If there was an airplane that went 2,000 miles in 3.5 hours. Find the average speed
Answers
Answer:
The answer is 571.43 mi/hrExplanation:
The average speed in the question can be found by using the formula
\(v = \frac{d}{t} \\ \)
where
d is the distance
t is the time taken
We have
\(v = \frac{2000}{3.5} \\ = 571.428571...\)
We have the final answer as
571.43 mi/hrHope this helps you
Related Questions
Yo sum help would be sick
Each shape in the chart represents a different type of atom. Atoms with a line (stick) between them show a chemical
bond. Cells A through D tell you whether or not a chemical bond occurs when the atoms combine.
Use the drawing tool to fill in cells A through D in the chart. Show what will happen when the atoms or molecules
combine. Use stick models as necessary.
Answers
Answer:
A
Explanation:
Answer:
see photo
Explanation:
PLATO answer
The half life of a radioactive element is 20 days. How many days will it take for the radioactive sample to decay to 1/8 its size?
Answers
Answer: 40 days
Explanation: The substance completely disintegrates in 20 days the substance completely disintegrates in 40 days 1/8 part of the mass of the substance will be left intact at the end of 40 days.
Help me please and ty!
Answers
Answer:
Its 2 and 3
Explanation:
What is Decomposition Reaction
Answers
Answer:
Explanation:
Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.
The decomposition reaction can be represented by the general equation:
AB → A + B
Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.
There are different types of decomposition reactions, including:
Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):
CaCO3 → CaO + CO2
Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):
2H2O → 2H2 + O2
Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:
Cl2 → 2Cl
These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.
Answer:
Explanation:
reaction in which a compound breaks down into simpler substances or elements
Which type of pathway produces carbon dioxide and water?
Answers
Cellular respiration can occur either anaerobically (without oxygen) or aerobically. Glucose and oxygen interact during aerobic cell respiration. As byproducts, both water and carbon dioxide are produced.
In glycolysis, are CO2 and water produced?In the majority of cells, glycolysis turns glucose into pyruvate, which mitochondrial enzymes then oxidize to produce carbon dioxide and water. However, due to the absence of mitochondria in some platelets, most notably adult red blood mitochondria, glycolysis serves as the only method of ATP synthesis.
What is the carbon dioxide diffusion pathway?The carbon dioxide moves out of the circulation, via the capillaries, and onto the alveoli where it is ejected, while at the same time oxygen bonds with hemoglobin to be transported back to the tissues once the venous returns to the lungs.
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when do you use the roman numerals when naming ionic compounds
Answers
Oxidation State
In chemistry, when naming ionic compounds there will sometimes be a roman numeral after the first element. This number represents the oxidation state of the element. An oxidation state is defined as the hypothetical charge of an atom, assuming that all of its bonds are fully ionic. In other words, the oxidation state shows how many electrons an atom gives or receives after ionization.
In ionic compounds, there will only ever be a roman numeral after the first element. This element will always be the cation (positively charged ion). So, the roman numeral will show how many electrons each cation gave.
When Roman Numerals are Necessary
This is necessary when you deal with transition metals or any other element that has multiple oxidation states. For example, iron can give 2 or 3 electrons. So, when naming a compound with iron you need to use a (II) or (III) to show how many electrons each iron atom gave.
When Roman Numerals are Unnecessary
On the other hand, roman numerals are unnecessary when using an element that only has one possible oxidation state. For example, Na can only give 1 electron ever, so it does not need a roman numeral. Additionally, elements in the second group like Mg can only ever give 2 electrons, so they also don't need a roman numeral to follow their name.
Carbon cycle – What are the main reservoirs
of the carbon cycle? Where do the inorganic and organic carbon
cycles interact? What are the major differences and similarities
between the inorganic and organic carbon?
Answers
The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.
The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.
Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.
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7. This question is about calculating the area.
A nanoparticle is in the shape of a cuboid.
Calculate its surface area to volume ratio.
Show working.
a
a = 80 nm
b = 15mm
c = 20nm
C
Surface area to volume ratio:
Answers
Answer:
Explanation
Finally, we can calculate the surface-area-to-volume ratio of the nanoparticle by dividing 4750 nanometers squared by 18750 nanometers cubed. It is important to place the surface area first because that is what the problem is asking us to compare.
An aluminum can is cut into small pieces. A 1. 16-g sample of the aluminum chips is used to prepare potassium alum according to the procedure described in this experiment. Calculate the theoretical yield (in grams) of potassium alum that could be obtained in the reaction using the correct number of significant figures. The molar mass of potassium alum is 474. 39g/mol.
Answers
To calculate the theoretical yield of potassium alum, we need to determine the number of moles of aluminum present in the 1.16 g sample and then use the stoichiometry of the reaction to find the corresponding number of moles of potassium alum.
Therefore, the theoretical yield of potassium alum that could be obtained in the reaction is approximately 10.23 grams.
First, we calculate the number of moles of aluminum using its molar mass:
Number of moles of aluminum = Mass of aluminum / Molar mass of aluminum
= 1.16 g / 26.98 g/mol (molar mass of aluminum)
≈ 0.043 moles
Next, we use the balanced chemical equation for the reaction between aluminum and potassium alum to find the mole ratio between aluminum and potassium alum. The balanced equation is:
2 Al + K2SO4 · Al2(SO4)3 + K2SO4
From the balanced equation, we see that 2 moles of aluminum react to form 1 mole of potassium alum.
Therefore, the theoretical yield of potassium alum is:
Theoretical yield = Number of moles of aluminum * (1 mole of potassium alum / 2 moles of aluminum)
= 0.043 moles * (1 mole / 2 moles)
= 0.0215 moles
Finally, we convert the number of moles of potassium alum to grams using its molar mass:
Theoretical yield in grams = Theoretical yield in moles * Molar mass of potassium alum
= 0.0215 moles * 474.39 g/mol (molar mass of potassium alum)
≈ 10.23 g
Therefore, the theoretical yield of potassium alum that could be obtained in the reaction is approximately 10.23 grams.
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the reaction of magnesium metal with hcl yields hydrogen gas and magnesium chloride. what is the volume, in liters, of the gas formed at 720 torr and 34 oc from 1.30 g of mg in excess hcl? (hint, first write the balanced equation.)
Answers
The volume of H₂ gas produced from 1.30 g of Mg in excess HCl is 0.0019 L.
The balanced equation for the reaction of magnesium metal with HCl is:
Mg + 2HCl → MgCl₂ + H₂
The molar mass of Mg is 24.31 g/mol.
The mass of Mg that reacted = 1.30 g
The moles of Mg that reacted = 1.30 g ÷ 24.31 g/mol = 0.0535 mol
According to the balanced equation, 1 mol of Mg reacts with 1 mol of H₂
Therefore, 0.0535 mol of Mg will produce 0.0535 mol of H₂.
Since, the volume of gas produced is proportional to the number of moles of the gas, we can use the ideal gas equation to find the volume of H₂
PV = nRT
Where, P = 720 torr = 720/760 atm (1 atm = 760 torr)
T = 34 + 273 = 307 K
R = 0.0821 L·atm/mol·K
V = n × 0.0821 L·atm/mol·K × 307 K/ 720 torr = 0.0535 mol/ 720 torr × 25.2047 L/molK =0.0019 L
At 720 torr and 34 °C, 0.0535 mol of hydrogen occupies a volume of 0.0019 L.
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help me with this science question for brainiest:)
Answers
Answer:
solid liquid and gas
Explanation:
Answer: Forms: Liquid water, solid water (ice) and gaseous water (water vapor)
Explanation:
Obviously liquid water comes from the sink, ice can be found in the freezer, and water vapor comes from boiling water, it is always in the air around us.
Liquid water is used for hydration or for food preparation. Ice is used to cool things down or in drinks, and water vapor isn't really used by humans. Rather, it serves as a natural greenhouse gas.
List two functions organ systems can perform
Answers
Answer:
nervous system- sends signals to the brain
respiratory system- sends oxygen to the body
How many moles of magnesium (mg2+) metal would be produced if 12 moles of potassium (k+) reacted?
Answers
6 moles of magnesium (Mg) would be produced if 12 moles of potassium (K) reacted.
balanced chemical equation for reaction of potassium with magnesium chloride is:
2 K + MgCl2 ⇔ 2 KCl + Mg
From this equation, every 2 moles of potassium (K) that react, 1 mole of magnesium (Mg) is produced.
Therefore, if 12 moles of potassium react, we can calculate the number of moles of magnesium produced as:
12 moles K × (1 mole Mg / 2 moles K) = 6 moles Mg
So, 6 moles of magnesium (Mg) would be produced if 12 moles of potassium (K) reacted.
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A gaseous product of a reaction is collected at 280K and 0.95 atm. Given
R= 0.0821L⋅atm/mol⋅K , what is the molar mass of the gas, in grams per mole, if 3.25 g of gas occupies 2.56 L?
Answers
The molar mass of the gas, given that 3.25 g of the gas occupied 2.56 L is 30.66g/mol
How do I determine the molar mass of the gas?To obtain the molar mass of the gas, we shall first obtain the number of mole of the gas. This can be obtained as follow:
Temperature (T) = 280 KPressure (P) = 0.95 atmVolume (V) = 2.56 L Gas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) =?PV = nRT
0.95 × 2.56 = n × 0.0821 × 280
Divide both sides by (0.0821 × 280)
n = (0.95 × 2.56) / (0.0821 × 280)
n = 0.106 mole
Haven obtain the mole of the gas, we shall determine the molar mass of the gas as follow:
Mole of gas = 0.106 moleMass of gas = 3.25 gMolar mass of gas =?Molar mass = mass / mole
Molar mass of gas = 3.25 / 0.106
Molar mass of gas = 30.66g/mol
Thus, the molar mass of the gas is 30.66g/mol
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When an experiment is repeated and the new results are different from the original results what may likely be inferred?
A)
Additional test/trials are needed.
B)
Both results are wrong due to the discrepancy.
C)
The hypothesis is incorrect and must be modified.
D)
The first must be inaccurate because you are sure the second results
are correct.
Answers
Answer:
A ) additional test/trial are needed
Select the correct answer.
Based on the law of conservation of energy, which statement is correct?
A.
Energy is always being added to all parts of the Universe.
B.
Energy is often destroyed in some parts of the Universe.
ОО
C.
Energy in a closed system cannot change forms.
D.
Energy in an isolated system remains constant.
Reset
Next
Answers
Answer:
D
Explanation:
Energy can neither be destroyed or created but can change forms.
Hope this helps!
5. Which concentration of HCI will yield the fastest reaction rate for this reaction?
2 HCI
+ FeS (s)→ H₂S (g) + FeCl2 (aq)
0.05 M
0.5 M
1.0 M
0.1 M
Answers
1.0 M. 1.0 M HCl has the highest concentration of hydrogen ions, which are required for the reaction to take place. The presence of more hydrogen ions will therefore result in a higher reaction rate.
Reaction of HClThis reaction involves the combination of two molecules of hydrochloric acid (HCl) with iron sulfide (FeS) to produce hydrogen sulfide (H₂S) and ferrous chloride (FeCl₂).
The reaction rate is affected by the concentration of the HCl, and the highest reaction rate would be achieved with a 1.0 M solution of HCl. The reaction is exothermic, meaning it releases energy in the form of heat.
This reaction is commonly used in industrial processes to produce H₂S, which has a variety of uses such as in the production of fertilizers, dyes, and various chemicals.
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Which of these is a way that bio stimulation can be used ?
Answers
Answer:
To combat the spread of invasive species
hope that helped <3
How many grams of HNO3 is needed to make 1.5 L of a 3 M solution of HNO3? Show work
Answers
Answer:
283.5g
Explanation:
first u need to know the molar mass of hno3 which is 63.01
the g=1.5×3×63.01
g= 283.5
The maximum number of electrons that can be placed into a single 2p orbital is
a. 2
b. 6
c. 3
d. 10
Answers
Given that E o = 0.52 V for the reduction Cu+(aq) + e− → Cu(s), calculate E o , ΔG o , and K for the following reaction at 25°C: 2Cu+(aq) ⇌ Cu2+(aq) + Cu(s)
Answers
25°C, the standard cell potential for the reaction 2Cu+(aq) ⇌ Cu2+(aq) + Cu(s) is 0.18 V, the standard Gibbs free energy change is -35,023 J/mol, and the equilibrium constant is 5.4 × 10^17.
The overall reaction is the sum of two half-reactions:
Cu+(aq) + e− → Cu(s) E° = 0.52 V
Cu2+(aq) + 2e− → Cu(s) E° = 0.34 V
To find the standard cell potential for the reaction, we can subtract the second half-reaction from the first one:
Cu+(aq) + e− → Cu(s) E° = 0.52 V
Cu2+(aq) + 2e− → Cu(s) E° = 0.34 V
2Cu+(aq) → Cu2+(aq) + Cu(s) E° = 0.52 V - 0.34 V = 0.18 V
The standard Gibbs free energy change for the reaction can be calculated using the equation:
ΔG° = -nFE°
where n is the number of moles of electrons transferred in the reaction and F is the Faraday constant (96,485 C/mol).
In this case, n = 2 (because two electrons are transferred) and:
ΔG° = -2 × 96,485 C/mol × 0.18 V = -35,023 J/mol
Finally, we can use the equation:
ΔG° = -RT ln K
where R is the gas constant (8.314 J/(mol·K)), T is the temperature in kelvins (25°C = 298 K), and K is the equilibrium constant.
Solving for K, we get:
K = e^(-ΔG°/RT) = e^(-(-35,023 J/mol)/(8.314 J/(mol·K) × 298 K)) = 5.4 × 10^17
Therefore, at 25°C, the standard cell potential for the reaction 2Cu+(aq) ⇌ Cu2+(aq) + Cu(s) is 0.18 V, the standard Gibbs free energy change is -35,023 J/mol, and the equilibrium constant is 5.4 × 10^17.
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Which of the follow is not a physical change?
a. The boiling of room temperature water to produce steam.
b. The combustion of hydrogen gas and oxygen gas to produce liquid water.
c. The cutting of a block of sharp cheddar cheese to make smaller pieces for hors d'oeuvres for a social gathering
d. The slow melting of solid coconut oil on the stove.
Answers
Answer:
d. The slow melting of solid coconut oil on the stove.
Explanation:
Matter can exist in three major states; solid, liquid and gas. These state can be converted from one to another through various processes that could lead to a physical or chemical change or both.
A physical change is a process that involves the transformation, i.e change of state, of a substance with no chemical change. While a chemical change would produce one or more products different from the initial substance.
From the question, the slow melting of solid coconut oil on the stove requires both physical and chemical change.
calculate the number of neutrons in the chorine 17CI and 17CI
Answers
Answer:
18 neutrons
Explanation:
In the element;
₁₇Cl
The number of electrons in the chlorine atom is 17.
The mass number of chlorine is 35.
Mass number is the number of protons plus number of neutrons.
Mass number = Protons + neutrons
Neutrons = mass number - protons
Number of protons in chlorine is 17;
So;
Neutrons = 35 - 17 = 18
Calculate the molarity of 6.631 g NANO3 in 100.0 mL of solution
please add steps
Answers
Taking into account the definition of molarity, the molarity of the solution is 0.78 \(\frac{moles}{liter}\).
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
\(molarity=\frac{number of moles}{volume}\)
Molarity is expressed in units \(\frac{moles}{liter}\).
Molarity of a solution of NaNO₃
In this case, you know:
number of moles= 6.631 g× \(\frac{1 mole}{85 g}\)= 0.078 moles (being 85\(\frac{g}{mole}\) the molar mass of NaNO₃, this is,the amount of mass that a substance contains in one mole.)volume= 100 mL= 0.1 LReplacing in the definition of molarity:
\(molarity=\frac{0.078 moles}{0.100 L}\)
Solving:
molarity= 0.78 \(\frac{moles}{liter}\)
Finally, the molarity of the solution is 0.78 \(\frac{moles}{liter}\).
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Sodium chlorate decomposes into sodium chloride and oxygen gas as seen in the equation below.
2NaClO3 --> 2NaCl +3O2
How many moles of NaClO3 were needed to produce 36 moles of O2? Round your answer to the nearest whole number.
Answers
According to the stoichiometry of the given chemical reaction, 6 moles of NaCl were produced by 6 moles of NaClO₃.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
In the given example, 2 moles of sodium chlorate gives 2 moles of sodium chloride, thus, for 36 moles of sodium chlorate 36×2/2=36 moles of NaCl is produced.
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the responsibility for all chemical evaluations rests with your employer.
Answers
While employers have a significant role in ensuring safety and compliance in the workplace, chemical evaluations involve a collective effort involving multiple stakeholders.
This includes chemical manufacturers, regulatory agencies, research institutions, and individuals handling chemicals. Each party has distinct responsibilities in chemical evaluations, such as conducting hazard assessments, providing safety data sheets, complying with regulations, and implementing safe practices. Ultimately, all stakeholders have a shared responsibility to prioritize the safety and well-being of individuals and the environment when it comes to chemical evaluations and handling.
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A protozoan gains shelter as it lives in the intestine of a termites, helping the termite to be able to digest the wood that it eats. This symbiotic relationship between the termite and protozoan is known as:
Answers
Answer:
The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of mutualism. Thank you for posting your question here at brainly. I hope the answer will help you.
For each of the following choose the variable that will be more favorable in solution formation. A) Weak or Strong Solvent intermolecular forces B) Weak or Strong Solute intermolecular forces C) Weak or Strong Solvent-Solute intermolecular force D) Increase or Decrease in Entropy E) Increase or Decrease in Enthalpy
Answers
Based on factors affecting solution formation;
Strong solvent-solute intermolecular forces favors solution formation.Increase in entropy favours solution formationDecrease in enthalpy favours solution formationWhat is a solution?A solution is a substance formed when a substance known as solute dissolves in another substance know as solvent.
Factors that affect solution formation include:
strength of intermolecular forces between solute and solvententropyenthalpyStrong solvent-solute intermolecular forces favors solution formation.
Increase in entropy favours solution formation
Decrease in enthalpy favours solution formation.
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Write the Electron Configuration using the box diagram or orbital diagram of each element.
11vNa
1s^2 2s^2 2p^6 3s^1
18vAr
1s^2 2s^2 2p^6 3s^2 3p^6
Answers
Answer:
Explanation:
1s^2 2s^2 2p^6 3s^1
wich combonations form compounds?how do you know ?
Answers
The combinations that will form compounds are:
metal and non-metals to form ionic bondsnon-metals and non-metals to form covalent bondsThe reason is that electrons are transferred or shared.
What are compounds?Compounds are formed when two or more elements combine together chemically to form a new substance.
The formation of compounds is a result of the formation of chemical bonds between the atoms of the elements that are combined.
There are two main types of chemical bonds in compounds:
Ionic or electrovalent bonds - these are bonds that are formed between oppositely-charged ions of two elements as a result of the transfer of electrons.
Covalent bonds - these are formed as a result of the sharing of electrons between atoms of elements.
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