Name 5 descriptions of a key including mass
Answers
Answer:
I'm assuming you're talking about something like a regular housekey, in which case there are numerous things you can describe!
Its mass: how much it weighs, times the gravity of the system.
Its color: is it silver-colored, or gold, etc.?
Its volume: you could probably calculate this, though it would be hard because it's not a traditional shape, I assume.
Its density: this is mass/volume. It means how many of the atoms are in a given space; how tightly packed the atoms are.
Its tendency to rust / its specific combination of metals or alloys: is it made of copper, tin, steel.. and these are all things that can rust to varying degrees.
Related Questions
If an element has an atomic number of 12 how many protons does each atom have?
Answers
The atomic number is equal to the number of protons in the nucleus
Question 2 of 30
A television commercial shows happy people while describing some medical
symptoms. These symptoms include feeling tired and sad. The medication
being advertised by the commercial was approved by the FDA to treat a
disease that causes these symptoms. The narrator says that it is available by
prescription only and contains 1% of the active ingredient. What can you infer
about this medication?
OA. The people in the commercial are happy because they were
treated by the medication.
B. The medication would be more effective if it contained 10% of the
active ingredient.
C. Anyone who has the symptoms should request a prescription
from his or her doctor.
D. The medication can treat people who have the disease described.
Answers
The medication can treat people who have the disease described. According to the commercial, the drug has FDA approval to treat a condition whose symptoms are listed.
Additionally, the narrator notes that the medication only comes with a prescription and has 1% of the active substance. We can deduce from this information that the drug can effectively treat persons who have the condition generating these symptoms, but obtaining it requires a prescription. The commercial provides no support for the other possibilities.
Therefore, the correct option is D.
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Compare a mixture and a compound. How are they alike?
Contrast a mixture and a compound. How are they different?
Answers
Answer:
gnzl8303
gnzl8303vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
Explanation:
Answer:
how they are alike: Both compound and mixture are combined in a definite ratio or in any proportion. Both compound and mixture consist of two or more substances/elements. Both compounds and mixtures have physical and chemical properties.
how they are different: The chemical composition of compounds is always fixed. A mixture can have a variable composition of the substances forming it. Mixtures can either be homogeneous or heterogeneous in nature. The constituents of a compound can only be separated by either chemical or electrochemical methods (like extraction).
Explanation:
A list of changes is shown. Temperature decreases Intermolecular bonds become weaker Melting Intermolecular bonds become stronger Temperature remains constant Temperature increases Vibration of molecules slows down Molecules vibrate faster Which of the above changes would be accompanied by an increase of the kinetic energy of particles in a solid? (4 points)
Answers
Answer:
Intermolecular bonds become weaker
Melting
Temperature increases
Molecules vibrate faster
Explanation:
In the solid phase, intermolecular forces are found to be strongest. However, as the temperature is increased, the molecules of the solid begin to vibrate faster and intermolecular forces between them begin to weaken.
As intermolecular forces of a substance become weaker, the substance melts. The molecules in the liquid state possesses greater kinetic energy than the molecules in the solid state.
Hence the the answer above.
Answer:
B, C, F, and H
Explanation:
These are all things that happen in the increase of the kinetic energy of particles in a solid.
B. Intermolecular bonds become weaker
C. Melting
F. Temperature increases
H. Molecules vibrate faster
Also, just took the test and got it right.
1. Carson completed conductivity testing on the solutions shown in the data table below and recorded his findings in the conductivity column. After determining which solutions conducted electricity and which solutions did not conduct electricity, Carson needs to explain his findings so that he can make predictions about conductivity in the future without having to complete the testing. Why do some of the solutions conduct electricity and some of the solutions not conduct electricity?
Results of conductivity testing: image
Consider Carson's findings, then make a claim to answer the question. Be sure to support your claim with sufficient evidence and reasoning.
Answers
Answer:
See below :)
Explanation:
There is an evident reason why some of the solutions Carson's has listed and observed, does conduct electricity and some that do.
A flow of electrical charge is called an electric current. Ions are atoms, or sets of atoms, that contain an electrical charge. There are two types of ions, cation or a positively charged ion containing a deficiency of electrons, and anion or a negatively charged ion which contains a surplus of electrons. When a solution conducts electricity the charge is carried within by ions that move through the solution. The larger the number of ions in the solution, the better the conductivity of the solution is. Pure water does not conduct very well because it contains very few ions, but when table salt (NaCl) is dissolved in the water, this solution does conduct well because the solution contains a more abundance of ions. The majority of the ions come from the table salt, chemically names sodium chloride. Because Sodium contains its sodium ions, and these are positive charge and chloride ions which is a negative charge, it is called an ionic substance. Not every substance is made up of ions, one such example is sugar (C12H22O11). Sugar is made up of uncharged particles also called molecules. Although sugar is a substance its molecules do not hold a charge, thus when sugar is dissolved in water, the solution does not conduct electricity, due to the lack of ions in the solution.
Therefore, depending on the ions that make up the compound, the substance would or would not conduct electricity.
Help me pleaseeeeee thanks
Answers
Any electrically conducting path that makes up an electric circuit in which the entire current passes through each component is referred to as a series circuit.
Thus, A series circuit's total current is equal to the current flowing through each resistor.
All of the parts of a series circuit are wired together end to end to create a single path for current flow. In a parallel circuit, one component is linked across the other by the same voltage at exactly two electrically common nodes.
More than two circuit components can be connected in two basic ways: series and parallel. In order to build more sophisticated series-parallel circuits, these two fundamental connection techniques can be combined.
Thus, Any electrically conducting path that makes up an electric circuit in which the entire current passes through each component is referred to as a series circuit.
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Name the following compound: OH CH.CH.CHCH. CH,CH,CH.
Da. heptanol O b. 3-heptanol Old hydroxyheptanol D d.
5-heptanol
Answers
The compound OH CH.CH.CHCH. CH,CH,CH is named 3-heptanol because it has a chain of seven carbon atoms with an OH group attached to the third carbon atom.
The compound OH CH.CH.CHCH. CH,CH,CH is named 3-heptanol.
To understand why it is named 3-heptanol, let's break down the name step by step:
1. The OH group at the beginning of the compound indicates that it is an alcohol, specifically a hydroxyl group (-OH) attached to a carbon chain.
2. The CH.CH.CHCH part of the compound indicates a chain of four carbon atoms. The numbers in front of the CH groups represent the positions of these carbon atoms in the chain.
3. Since there is an OH group attached to the third carbon atom in the chain, the compound is named 3-heptanol. The "hept" in the name refers to the seven carbon atoms in the chain, and the "ol" at the end indicates that it is an alcohol.
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Find the mass of a 50.0 ml quantity of water if the density of water is 3.25 10 poin g/ml * O 15.38 g O 162.5 g 0.0659 O 124.3g What is an extensive property? * 10 poli
Answers
The behavior of an organism is influenced A. only by the organism's life experiences. B. only by the organism's evolutionary history. C. by both the organism's evolutionary history and its life experiences. D. by neither the organism's evolutionary history nor its life experiences.
Answers
calculate the p h h of a solution prepared from 0.201 mol m o l of nh4cn n h 4 c n and enough water to make 1.00 l l of solution. express your answer using two decimal places.
Answers
The pH of a solution prepared from 0.201 mol/L of NH4CN and enough water to make 1.00 L of solution is 4.24.
To calculate the pH of this solution, you first need to calculate the concentration of H+ ions in the solution. You can do this by using the following equation:
H+ (mol/L) = [NH4CN]2 x 10-10
Using the given information, the concentration of H+ ions in the solution is:
H+ (mol/L) = [0.201 mol/L]2 x 10-10 = 4.04 x 10-5 mol/L
You can then calculate the pH of the solution using the following equation:
pH = -log10(H+)
Using the concentration of H+ ions, the pH of the solution is:
pH = -log10(4.04 x 10-5) = 4.24
Therefore, the pH of a solution prepared from 0.201 mol/L of NH4CN and enough water to make 1.00 L of solution is 4.24.
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which element has chemical properties that are most similar to potassium?
a. calcium
b. cesium
c. nitrogen
d. sulfur
Answers
Answer:
CESIUM
Explanation:
Potassium is one of the alkali metals. The alkali metals are the elements that make up Group 1 (IA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to one another. The alkali metals also include lithium, sodium, rubidium, cesium, and francium.
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The element which contains similar chemical properties as of Potassium would be:
B). Cesium
'Potassium' is described as the element that is 'soft and waxy in appearance' with the symbol K and atomic number 19 and "Cesium' is also soft in nature and it possesses a goldy finish.
The similarity between the chemical properties of 'Potassium' and 'Cesium' include:
Both are the components of the group of alkali metals. Both of them are highly responsive metals. 'Potassium' and 'Cesium,' both are soft in texture.Thus, option B is the correct answer.
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You have three elements, A, B, and C, with the following electronegativity values:
A = 0. 9
B = 3. 0
C = 3. 5
You react the elements to form the substances AB, AC, and BC. Answer the following questions:
What type of substance is AB? What types of bonds are present? Explain your answer. What type of substance is AC? What types of bonds are present? Explain your answer. What type of substance is BC? What types of bonds are present? Explain your answer. If any of the substances are ionic compounds, which element is the cation and which is the anion? Explain your answer. Answer:
Answers
Because the difference in electronegativity between A and B is rather tiny (2.1), below the cutoff for an ionic bond, AB is a polar covalent compound.
Covalent bonds, which are created when two atoms share electrons, are the sorts of bonds that are present.Because the electronegativity difference between A and C is high (2.6), above the cutoff for an ionic bond, AC is an ionic compound. Ionic bonds, which are created when electrons are moved from one atom to another, are the sorts of bonds that are present.Due to the high (0.5) electronegativity difference between B and C, which is above the ionic bond threshold, BC is likewise an ionic compound. Ionic bonds, covalent bonds, and other types of bondsas a result of the transfer of electrons from one atom to another.As both elements share electrons to create a covalent bond, there are no cations or anions in AB.The cation in AC is A, and the anion is C. C acquires an electron, making it negatively charged, whereas A loses an electron, making it positively charged.B is the cation and C the anion in BC. While C receives an electron to become negatively charged, B loses one to become positively charged.
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What do you think? Is our current understanding ofthe Universe backed up with facts? Is it a good theory
Answers
Answer:
Yes
Explanation:
The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not expand "into" anything and does not require space to exist "outside" it.
HCL is pure covalent compound but soluble in solvent water why
Answers
Answer:
HCl is a polar covalent compound, because of electronegativity difference between Cl(3.5) and hydrogen (2). Hence in this way, the bond between HCl breaks and they formed ions in the polar solvent like water .
The equilibrium constant for the chemical equation N2(g) + 3H2(g) arrow 2NH3(g) is Kp = 7.82 at 195 degrees Celsius. Calculate the value of Kc for the reaction ..
Answers
The value of Kc for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) at 195 degrees Celsius is 4.16 x 10^2 mol/L.
Given
At 195 degrees Celsius, the chemical equation N2(g) + 3H2(g) arrow 2NH3(g) is Kp = 7.82.
To Find
the value of Kc for the reaction.
Solution
We must apply the relationship between Kp and Kc, which is given by: to determine the value of Kc for the reaction.
Kc = Kp (RT) n
where:
Partial pressures are used to express Kp, the equilibrium constant.
In molar concentrations, Kc represents the equilibrium constant.
The gas constant, or R, is 0.08206 L atm/K mol.
The temperature in Kelvin is T.
The stoichiometric coefficient n is the difference between the total of the gaseous products' and the gaseous reactants' stoichiometric coefficients (in this case, n = 2 - (1+3) = -2).
To find Kc, we can rearrange this equation as follows:
Kp = Kc / (RT)
Inputting the values provided yields:
Kc is calculated as 7.82 / (0.08206 L atm/K mol * (195+273) K).(-2)
Kc equals 4.16 x 102 mol/L
Therefore, the value of Kc for the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) at 195 degrees Celsius is 4.16 x 10^2 mol/L.
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(28) CCC Cause and Effect Young's modulus is a measure
of a solid material's stiffness. A highly ductile
material will typically have a very low modulus. The
table shows several different metals, their crystalline
structure, and their Young's modulus. Describe the
pattern you observe and explain the connection
between structure and stiffness.
Answers
From the table, it is very clear that as the crystallinity increases, its stiffness also increasing. The FCC structures are having less crystallinity and is more ductile than BCC structure.
What is ductility of a material ?Ductility of a material is the ability to make very thin elongated wires. Whereas, stiffness of a material is the resistance to any elongation or compression.
The more crystalline the material, more will be the stiffens. The material with higher Young's modulus (Y) are more crystalline and stiff. As Y decreases, stiffness decreases, the material becomes ductile.
Because the body-centered cubic (BCC) lattice is not tightly packed despite being cubic, the face-centered cubic (FCC) crystalline structure has greater ductility than the BCC.
Due to the fact that a hexagonal close-packed (HCP) lattice is densely packed but not cubic, HCP metals are less ductile than BCC and FCC metals.
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A change that produces a new substance is a _______ change
Answers
Answer is chemical change
a chemical change, also known as a chemical reaction, is a process in which one or more substances are altered into one or more new and different substances. in other words, a chemical change is a chemical reaction involving the rearrangement of atoms.
look at image please
Answers
The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g
How do i determine the mass of oxygen produced?From the question given, the following data were obtained:
Mass of potassium permanganate = 15.8 gMass of remaining material after heating = 14.2 gMass of oxygen gas =?The mass of oxygen gas produced from the reaction can be obtained as follow:
Mass of potassium permanganate = Mass of remaining substance + mass of oxygen
Inputting the given parameters, we have:
15.8 = 14.2 + mass of oxygen
Collect like terms,
Mass of oxygen = 15.8 - 14.2
= 1.6 g
Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g
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based on figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment (phph near 6) to a basic environment will have on peroxidase activity?
Answers
Peroxidase activity increases and then decreases due to a change from a moderately acidic environment (pH near 6) to a basic environment.
What is peroxidase activity?Peroxidase is an enzyme found in a wide variety of organisms, from plants to humans to bacteria. Its function is to decompose hydrogen peroxide (H₂O₂). Hydrogen peroxide is one of the toxins produced as a by-product of using oxygen to breathe. (The fact that hydrogen peroxide is toxic makes it useful in first aid kits.
Peroxidase activity is strongly influenced by pH factors. Peroxidase works best at pH 7, but increasing or decreasing pH adversely affects its activity. Therefore, when moving from a weakly acidic environment close to pH 6 to a basic one, the peroxidase activity increases as the neutral environment approaches and decreases as the basic environment approaches, so that the peroxidase activity varies with the pH of the solution.
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The complete question is as follows:
Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH . The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C . The results of the experiment are represented in Figure 1.
Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity?
answer choices
Peroxidase activity will decrease.
Peroxidase activity will increase.
Peroxidase activity will stay the same.
Peroxidase activity will increase at first and then decrease.
The pressure of Cl2 gas in a 2.0-L cylinder is 300. kPa at 25°C. What is the pressure (in kPa) when this gas is released into a 100-L chamber at 25°C? ______ kPa
Answers
The Final Pressure of the gas is 6 kPa
What is Boyle's Law ?At constant Temperature , the absolute pressure exerted by the gas is inversely proportional to the volume of the gas.
\(\rm P_1V_1 = P_2V_2\)
It is given that
\(\rm P_1 = 300k.Pa\\T_1 = 25 \; Degree\\V_1 = 2L\\V_2 = 100L\\T_2 = 25 Degree\\P_2 = ?\)
To determine Final Pressure , Boyle's Law will be applied
300 * 2 = P₂ * 100
P₂ = 300 * 2 / 100
P₂ =6 kPa
Therefore the Final Pressure of the gas is 6 kPa.
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Calculate the molality of 14.3 grams of sucrose (C12H22O11) in 676 grams of water.
Answers
Answer:
The molality of 14.3 grams of sucrose in 676 grams of water is approximately 0.0618 mol/kg.
Explanation:
To calculate the molality of a solute in a solvent, we need to use the formula:
Molality (m) = moles of solute / mass of solvent (in kg)
Given:
Mass of sucrose (solute) = 14.3 grams
Mass of water (solvent) = 676 grams
Step 1: Convert the mass of the solute to moles.
The molar mass of sucrose (C12H22O11) can be calculated by adding up the atomic masses of each element:
C = 12.01 g/mol, H = 1.01 g/mol, and O = 16.00 g/mol.
Molar mass of sucrose = (12 × 12.01) + (22 × 1.01) + (11 × 16.00) = 342.34 g/mol
Now, we can calculate the number of moles of sucrose:
Moles of sucrose = mass of sucrose / molar mass of sucrose
= 14.3 g / 342.34 g/mol
= 0.0418 mol
Step 2: Convert the mass of the solvent to kilograms.
Mass of water = 676 grams = 0.676 kg
Step 3: Calculate the molality.
Molality (m) = moles of solute / mass of solvent (in kg)
= 0.0418 mol / 0.676 kg
≈ 0.0618 mol/kg
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The molality of 14.3 grams of sucrose in 676 grams of water is approximately 0.0618 mol/kg.
To calculate the molality of a solute in a solvent, we need to use the formula:
Molality (m) = moles of solute / mass of solvent (in kg)
Given:
Mass of sucrose (solute) = 14.3 grams
Mass of water (solvent) = 676 grams
Step 1: Convert the mass of the solute to moles.
The molar mass of sucrose can be calculated by adding up the atomic masses of each element:
C = 12.01 g/mol, H = 1.01 g/mol, and O = 16.00 g/mol.
Molar mass of sucrose = (12 × 12.01) + (22 × 1.01) + (11 × 16.00) = 342.34 g/mol
Now, we can calculate the number of moles of sucrose:
Moles of sucrose = mass of sucrose / molar mass of sucrose
= 14.3 g / 342.34 g/mol
= 0.0418 mol
Step 2: Convert the mass of the solvent to kilograms.
Mass of water = 676 grams = 0.676 kg
Step 3: Calculate the molality.
Molality (m) = moles of solute / mass of solvent (in kg)
= 0.0418 mol / 0.676 kg
≈ 0.0618 mol/kg
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Name these compounds according to IUPAC. (ASAPP)
Answers
Propanal and acetone are the IUPAC names for the chemical.
What is the difference between propanal and acetones?Propanal, commonly known as propanaldehyde, is an aldehyde with one double bond and one oxygen atom.
Acetone is a ketone compound. R2CO is the functional group of ketones.
Thus, Propanal and acetone are the IUPAC names for the chemical.
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Calculate the mass of 4.95 x 10^15 Ag atoms
Answers
Answer:
8.87 × 10⁻⁷ grams
Explanation:
Moles = No. of Particles / 6.022 × 10²³ Particles/mol
Moles = 4.95 × 10¹⁵ atoms / 6.022 × 10²³ atoms/mol
Moles = 8.22 × 10⁻⁹ mol
Also,
Mass = Moles × M.Mass
Mass = 8.22 × 10⁻⁹ mol × 107.87 g/mol
Mass = 8.87 × 10⁻⁷ grams
4. An organism that creates its own food is called
• Decomposer
• Producer
• Scavenger
Consumer
hurry please!!
Answers
Answer:
producer
Explanation:
just believe me
A bottle of Nitroglycerin has the labeled strength of l/200 grains. What would this strength be in milligrams
Answers
strength in milligrams is 0.3mg
What is Strength?Mass of the solute in grams/Volume of the solution in litres equals the strength of the solution. The overall formula must be multiplied by 1000 if the volume is measured in millilitres (mL). The concentration of the solution, measured in grammes per litre, can be used to determine the solution's strength.
Molarity - The moles of solute per litre of solution is measured as molarity. For instance, when table salt is dissolved in water, water serves as both the solution and the solute. Sodium chloride weights 58.44 grammes per mole. One molar solution, or 1M, is created by dissolving 58.44 grammes of sodium chloride in one litre of water.
Relation between Molarity and Strength?
The volume of solute in one litre of a solution determines its strength. As a result, a solution's strength is calculated by multiplying its molecular mass by its molarity.
1 grain = 64.8 milligrams.
1/200 grains = 64.8/200
= 0.3mg
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A cup sits on a table. Due to its position, the potential energy of the cup is 3.00 joules. Ignoring frictional effects, if the cup falls off the table, how much kinetic energy will it have when it is halfway to the floor? a) 3.00 J b) 1.50 J c) 0.00 J d) cannot be determined without knowing the mass and the height of the cups
Answers
Answer: 1.50 J
Explanation:
Answer:
1.5 joules
Explanation:
Due to conservation of energy, half way the potential energy will be 1.5J so the remaining 1.5J is kinetic energy.
Which term describes the conversion of substances into different substances? (1 point)
O ionic bonding
O fossilization
O chemical reaction
O photosynthesis
Answers
Chemical reaction is the term which describes the conversion of substances into different substances.
What is chemical reaction?Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.
There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical reactions:
1) inorganic reactions
2)organic reactions
3) biochemical reactions
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The pH of a solution is tested and found to be 5.5. What can be concluded about the solution?
1: The solution is acidic.
2:The solution is basic.
3:The solution is dilute.
4:The solution is neutral.
Answers
Answer:
The correct answer is - option 1. the solution is acidic.
Explanation:
The pH is a scale to measure or check the acidity or basicity of an aqueous solution. The lower values on the pH scale indicate the acidity of the solution as on the pH bar 0 indicating the highest acidic value and the higher value indicates the alkaline or basic value of the solution and 14 indicating the highest alkaline. The pH of water is 7 which is a neutral condition.
Therefore, the pH of a solution with 5.5 on pH solution represents the acidic property of the solution, however, it is slightly acidic as it is near the neutral value.
Answer:
The solution is acidic
Explanation:
The lower the number, the more acidic the solution is
He….llllllllllllpppp
Answers
Answer: its millimeters
Explanation: we use millimeters foe liquids like water for example
Explain how acids and bases directly or indirectly affect the hydrogen ion concentration of a solution.
Answers
By taking hydrogen ions, certain bases directly lower the H+ than OH- concentration. Other bases break down to create hydroxide ions, which indirectly lowers the H+ concentration.
What is the difference between acid and base?H+ ion concentration is raised by an acid. A base is a chemical that, in an aqueous solution, produces hydroxide (OH-) ions, gives electrons, and receives protons. A donor of protons is an acid. A proton can enter a base. When dissolved in water, an acidic chemical compound produces a solution that has more H+ ion activity than clean water. A base is an aqueous material that releases hydroxide (OH-) ions, receives protons, or contributes electrons. A donor of protons is an acid. A base is a proton acceptor.
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