What is the chemical formula for magnesium hydroxide?
Question 21 options:
MgHO2
MgH2O
MgOH
Mg(OH)2
Answers
Answer:
the chemical formula of magnesium hydroxide is Mg(OH)2
Related Questions
how many moles are there in 4.00 moles of glucose, C₆H₁₂O₆
Answers
2.40 ×10²⁴ molecules are there in 4.00 moles of glucose, C₆H₁₂O₆. A molecule is a collection of at least two atoms.
What is molecule?According on the context, the word can or cannot encompass ions that meet this requirement. A molecule is a collection of at least two atoms bound together by the attractive forces called as chemical bonds.
When speaking of polyatomic ions, the difference between them and ions is frequently ignored in the fields of quantum theory, organic chemistry, especially biochemistry.
number of molecule = number of moles × 6.022×10²³
= 4× 6.022×10²³
= 2.40 ×10²⁴ molecules
Therefore, 2.40 ×10²⁴ molecules are there in 4.00 moles of glucose, C₆H₁₂O₆.
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How is carbon dioxide different than the other types of matter
Answers
what is the percentage of nitrogen in the fertilizer urea ((nh2) 2co)
Answers
Answer:
You have 1680 grams of urea. It means (in it) there are 787 grams of nitrogen, 112 grams of hydrogen, 336 grams of carbon, and 448 grams of oxygen.
Explanation:
What is the pH of a 0.0340 M HCl solution?
Answers
Answer:
HCl → H+ + Cl-
pH = -log[H+] = 1.469
Explanation:
Strong acid doesn't establish equilibrium. To determine the pH of a strong acid, the concentration of the acid is equal to the concentration of the hydrogen ion, so take the -log[H+], which will give you the pH. And you can see that it is a small number, and that's because HCl is a strong acid.
The pH of a solution can be calculated using the equation: pH = -log[H+]
What is pH?pH is a measure of the acidity or alkalinity of a solution. It is a scale that ranges from 0 to 14, with 7 being considered neutral. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity.
In this case, the HCl solution has a concentration of 0.0340 M, which represents the concentration of H+ ions. Since HCl is a strong acid, it completely dissociates in water, yielding one H+ ion for every HCl molecule.
Therefore, the concentration of H+ ions is equal to the concentration of the HCl solution, which is 0.0340 M.
Taking the negative logarithm of 0.0340, we have:
pH = -log(0.0340)
Using a calculator, we find that the pH of the 0.0340 M HCl solution is approximately 1.47.
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What is the amount of space occupied by a sample of matter
Answers
The amount of space that matter occupies is called its volume. Solids, liquids, and gases all have volume.
An elephant and a parakeet standing on ledge will have a different amount of potential energy because of their . this is for science actually
Answers
Answer:
Mass
Explanation:
Cody's car accelerates from 0m/s to 45m/s northward in 15 seconds. What is the acceleration of the car?
Answers
Cody's vehicle accelerates by 3 m/s2 (northward) in the 15 seconds it takes to go from 0 m/s to 45 m/s (northward).
What is the secret to motion?Newton's second law, which states that the force acting on a body is equal to the mass of the body, is the fundamental equation of motion in classical mechanics acceleration an of its center of mass, or F = ma.
When the final velocity is 45 m/s (northward), the beginning velocity is 0 m/s, and the time is 15 seconds, we can calculate the acceleration using the formula acceleration = (final velocity - initial velocity) / time.
When these values are added to the formula, we obtain:
acceleration = (45 m/s - 0 m/s) / 15
acceleration = 3 m/s² (northward).
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an ideal gas occupies 1.2 m3 at a pressure of 1.0 x 105 pa and a temperature of is compressed ti a volume of 0.60 m3 and heated to a temperature of . what is the new pressure?
Answers
the ideal gas law equation: PV = nRT Since the gas is an ideal gas, we can assume that the number of moles and gas constant remain constant throughout the process.
the missing temperature value and I would be happy to help you solve for the final pressure.
Hi, I'd be happy to help you with your question. To find the new pressure of an ideal gas when it is compressed to a volume of 0.60 m³ and heated to a certain temperature, we can use the Ideal Gas Law equation:PV = nRT
where P is pressure, V is volume, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature. . However, the initial temperature is not provided in your question. Please provide the initial and final temperatures to calculate the new pressure accurately.
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in an experiment with 1m ch4, 2m h2s, 1mcs2, and 2mh2, if ch4 is 1.39 m at equilibrium, what are the concentrations of the other substances?
Answers
Generally, Equilibrium is defined as a state in which opposing forces or actions are balanced so that one is not stronger or greater than the other.
Concentration of CH₄ = 1.39
So X here is = -1.39 + 4 = 2.61
So concentration of,
H₂S = 8 - 2 × (2.61) = - 2. 78 M
Cs₂ = 4 - 2.61 = 1.39 M
H₂ = 8 - 4 (2.61) = -2.44 M
Concentration is defined as the amount of a substance, such as a salt, that is in a certain amount of tissue or liquid, such as blood. When less water is present in a substance it usually becomes more concentrated.
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Read the article and answer the 6 questions in it.
Answers
Answer:
Yea.....where is the article and the 6 questions?
Answer:
Answering
Explanation:
do u want us to tell u what we got?
Maintenance rehearsal involves:
(A) Recalling the words at the end of a list
(B) Intentionally repeating information
(C) Processing visual memories
(D) Systematically recalling information
(E) Processing iconic memories
Answers
The correct answer is (B) Intentionally repeating information.
Maintenance rehearsal is a memory strategy that involves repeating information over and over again in order to maintain it in short-term memory. This type of rehearsal is typically used when we need to hold information in our working memory for a short period of time, such as when we need to remember a phone number or a name that we just heard.
Maintenance rehearsal is different from elaborative rehearsal, which involves processing information at a deeper level by connecting it to other information in long-term memory. In contrast, maintenance rehearsal simply involves repeating the information without any further processing.
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what type of force do you use when your brush your teeth? Is the force balanced or unbalanced?
Answers
Answer:
balanced forced
Explanation:
Animals use oxygen in the process of
blank
and emit CO2 as a byproduct.
Answers
Answer:
Respiration
Explanation:
The act of breathing, simple as that!
Hope this helped!!
Calculate the ph of a solution prepared by dilution 3.0 ml of 2.5 m hcl to a final volume of 100 ml with h2o.
Answers
The pH of the solution after dilution is 1.125.
HCl is hydrochloric acid. It is known by the name muriatic acid. It is among the strong acids. It has a pungent smell and is colorless. It has a molar mass of 36.4 g/mol. It's a common reagent used in pharmaceutical industries. It is also used in other industries such as textile, rubber, and metal.
The volume of HCl added to the solution = 3.0 ml
The molar concentration of HCl = 2.5 M
Let the molar concentration of the solution after dilution is x.
The volume of the diluted solution = 100 ml.
The molar concentration of the solution after dilution is,
\(M _{1} V _{2} = M_{2} V _{2} \)
\(M_{2} = \frac{ M _{1} V _{2}}{V _{2} }\)
\(M_{2} = \frac{2.5 \times 3}{100} \)
\( = 0.075 \: M\)
Thus, the molar concentration of the solution after dilution is 0.075 M.
The pH of the solution after the dilution is,
\([HCl] = [H ^{ + } ] = 0.075 \: M\)
\(pH = - log [H ^{ + } ] \)
\(pH = - log(0.075)\)
\(pH = 1.125\)
Therefore, the pH of the solution after dilution is 1.125.
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1) What do you mean by a reference point?
Answers
Answer:
A reference point is a place and/or object that is used for comparison, determining if something is in motion.
Draw the dot and cross diagram for CaCl2.
P.S:I need the answer ASAP
Answers
The dot structure of the compound that is referred to here is shown in the image attached.
What is a dot structure?
A dot structure, often called a Lewis structure or an electron dot structure, depicts how atoms and valence electrons are arranged in a molecule or ion. Around the atomic symbols, valence electrons are represented by dots.
Each atom's symbol in a dot structure is surrounded by dots that stand in for the atom's valence electrons. The electrons in an atom's outermost shell known as valence electrons participate in chemical bonding.
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If a sample of gas occupies 23. 5 ml at 315 k and 14. 8 atm of pressure, what volume will it occupy at 415 k and 12. 3 atm?.
Answers
The volume occupy at 415K and 12.3atm is 37.25ml.
Ideal gas:
An ideal gas is a theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions. It is one for which both the volume of molecules and forces between the molecules are so small that they have no effect on the behavior of the gas.
Here we have to find the volume occupied.
The formula for an ideal gas:
P1 V1 / T1 = P2 V2 / T2
V2 = P1 V1 T2 / T1 P2
P1 = 14.8atm
P2 = 12.3atm
V1 = 23.5 ml
T1 = 315K
T2 = 415K
Now putting these values in the equation we get:
V2 = (14.8× 23.5 × 415)/ ( 12.3 × 315)
= 144,337 / 3874.5
= 37.25 ml
Therefore the 37.25ml is the volume.
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You are doing a science experiment and watching the temperature change in Celsius degrees. If the temperature changes by 5°C, how does it change in Kelvins?
Answers
Answer:
Explanation:
Hi!
The kelvin tempreture is 273.15, so if you need to convert from celsius to kelvin, all you need to do is add the celsius to that number.
Here is the formula we'll be using K = C + 273.15.
5°C + 273.15 = 278.15K
Hope that was clear!
A 6. 0 L sample of nitrogen gas contains 0. 50 mole of a gas. If enough gas is added to make a total of 0. 75 moles at the same pressure and temperature, what is the resulting total volume of the gas? 2. 3 L 4. 8 L 7. 5 L 9. 0 L.
Answers
The resulting total volume of the gas is 9.0 L.
According to the ideal gas law, the number of moles of gas is directly proportional to the volume of the gas when pressure and temperature are held constant. In this case, the initial volume of the gas is 6.0 L, and it contains 0.50 moles. The goal is to determine the resulting total volume when the number of moles is increased to 0.75.
Since the number of moles and volume are directly proportional, we can set up a proportion to solve for the resulting volume:
0.50 moles / 6.0 L = 0.75 moles / x
Cross-multiplying the equation gives:
0.50 moles * x = 0.75 moles * 6.0 L
Simplifying the equation yields:
x = (0.75 moles * 6.0 L) / 0.50 moles
x = 9.0 L
Therefore, the resulting total volume of the gas is 9.0 L.
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A 23. 6 g sample of Na3PO4 (molar mass 163. 94 g/mol) is dissolved in enough water to produce
750. ML of solution
Calculate the concentration of Nations in solution.
Write your answer using three significant figures.
Answers
The concentration of sodium ion, Na⁺ in the solution, given that 23.6 grams of Na₃PO₄ is dissolved in 750 mL of water is 0.576 M
How to determine the concentration of sodium ion, Na⁺ ?We'll begin by obtaining the molarity of the solution. This is illustrated below:
Mass of Na₃PO₄ = 23.6 gMolar mass of Na₃PO₄ = 163.94 g/molMole of Na₃PO₄ = 23.6 / 163.94 = 0.144 moleVolume = 750 mL = 750 / 1000 = 0.75 LMolarity = ?Molarity = mole / volume
Molarity = 0.144 / 0.75
Molarity = 0.192 M
Finally we shall determine the concentration of the sodium ion, Na⁺. Details below:
Na₃PO₄(aq) <=> 3Na⁺(aq) + PO₄³⁻(aq)
From the balanced equation above,
1 mole of Na₃PO₄ contains 3 moles of Na⁺
Therefore,
0.192 M Na₃PO₄ will contain = 0.192 × 3 = 0.576 M Na⁺
Thus, the concentration of Na⁺ is 0.576 M
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The atoms of elements A (blue) and B (orange) form 2 compounds shown here. Do these compounds obey the law of multiple proportions?
Answers
Hello. You have not presented the image that presents the two elements mentioned in the question. This makes it impossible for your question to be answered. However, I will try to help you as best I can.
To say whether the compounds obey the law of multiple proportions, you should observe whether one of the elements, formed from the compounds, maintains a fixed mass, while the other element presents the mass in a varied amount of small, whole numbers, spread across the formed compounds .
This is because the law of multiple proportions states that an element must have a fixed mass when reacting with another element to create compounds. This reaction will allow this element to keep the mass fixed, while the other element will generate different compounds, where each one presents a part of the mass of the forming element, in small and whole numbers.
Is it Ca₂C or CaC₂ which is calcium carbide?
Answers
The correct chemical formula for calcium carbide is CaC₂, not Ca₂C. It is a compound that is formed by the combination of calcium and carbon.
What is Calcium?
Calcium is a chemical element with the symbol Ca and atomic number 20. It is a soft, silvery-white metal that belongs to the alkaline earth metals group.
Calcium carbide is an important industrial chemical that is used in a variety of applications, including the production of acetylene gas, which is used as a fuel and in welding and cutting applications. It is also used in the production of calcium cyanamide, which is used as a fertilizer, and in the production of various organic chemicals. The difference between CaC₂ and Ca₂C is significant, as the latter compound does not exist. It is important to use the correct chemical formula when referring to a particular compound, as using an incorrect formula can lead to confusion and potentially dangerous situations in industrial settings.
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- Write equations for (a) the decomposition of carbon monoxide-
co_to produce carbon--and oxygen gas and (b) the synthesis reaction for the formation of carbon monoxide from carbon and Oxygen.
Answers
Explanation:
here's the answer to your question about
What is the first stage of a lunar eclipse?
Answers
The first stage of a lunar eclipse:
Penumbral eclipse.
There are 7 stages of a total lunar eclipse. The first one is when the Penumbral eclipse begins. his begins when the penumbral part of Earth's shadow starts moving over the Moon. This phase is usually not feasible to be seen with the naked eye.
2. in the stream table diagram below, draw what you see in the stream table once the water has stopped flowing through it. Make sure to draw any landforms that the flowing water formed. Remember, you are looking at the stream table from above (bird's-eye view).
Answers
Once the water has stopped flowing through the stream table, it would form a valley, or a gorge, or a canyon.
The landform that the flowing water forms on the stream table is a valley. Valleys are created by the action of flowing water. Overland water movement creates rills, which ultimately transform into gullies. Valleys are formed as these gullies gradually deepen and widen.
A gorge is a deep valley with abruptly straight or extremely steep sides. A canyon can be as deep as a gorge and is characterized by steep, step-like side slopes. A canyon is broader at its top than at its bottom and is created in horizontally bedded sedimentary rocks, as opposed to a gorge, which is approximately equally wide at its top and bottom.
Therefore, when we look at the stream table from above with a bird's-eye view, we would find the formation of a valley.
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How many grams of sodium hydroxide are present in 250.0 mL of a 0.300 M NaOH solution?
Answers
………………………………….
Given: 36.7 grams of CaF2 is added to 300 mL water. Find molarity?
Answers
2 M
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Unit 0
Reading a Periodic TableUsing Dimensional AnalysisAqueous Solutions
Molarity = moles of solute / liters of solutionExplanation:Step 1: Define
36.7 g CaF₂
300 mL H₂O
Step 2: Identify Conversions
Molar Mass of Ca - 40.08 g/mol
Molar Mass of F - 19.00 g/mol
Molar Mass of CaF₂ - 40.08 + 2(19.00) = 78.08 g/mol
1000 mL = 1 L
Step 3: Convert
Solute
Set up: \(\displaystyle 36.7 \ g \ CaF_2(\frac{1 \ mol \ CaF_2}{78.08 \ g \ CaF_2})\)Multiply: \(\displaystyle 0.470031 \ mol \ CaF_2\)Solution
Set up: \(\displaystyle 300 \ mL \ H_2O(\frac{1 \ L \ H_2O}{1000 \ mL \ H_2O})\)Multiply: \(\displaystyle 0.3 \ L \ H_2O\)Step 4: Find Molarity
Substitute [M]: \(\displaystyle x \ M = \frac{0.470031 \ mol \ CaF_2}{.3 \ L \ H_2O}\)Divide: \(\displaystyle x = 1.56677 \ M\)Step 5: Check
Follow sig fig rules and round. We are given 1 sig fig as our lowest.
1.56677 M ≈ 2 M
Assertion: An object floats if it displaces an amount of liquid whose weight is greater than the actual weight of the object.
Reason: During floatation an object experiences no net force in the downward direction.
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(c) Assertion (A) is true but reason (R) is false. (d) Assertion (A) is false but reason (R) is true
(d) Assertion (A) is false but reason (R) is true
Answers
Based on the assertion and the reason regarding the weight of an object and upthrust experienced by the body in a fluid; Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
The correct option is A.
What is the principle of floatation?The principle of floatation states that an object will float in a fluid if the upthrust that is experienced by the object is equal to or greater than the weight of the object.
The upthrust experienced by a body is the upward force that a liquid or gas exerts on a body floating in it.
Upthrust on a body depends on the acceleration due to gravity, the density of the liquid, and the volume of the body immersed in the liquid.
The weight of a body is the force of gravity acting on the body. The weight of a body acts downward.
Thus in a fluid, the weight of an object acts downward while the upthrust on the object acts in an upward direction.
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2In what way are liquids different from solids?
Answers
Answer:
solid: Relatively rigid, definite volume and shape. In a solid, the atoms and molecules are closely bonded that they vibrate in place but don't move around. liquids: Definite volume but able to change shape by flowing. In a liquid, the atoms and molecules are loosely bonded.
Explanation:
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Which of the following ions is formed when the positive hydrogen ions from an acid bond to water molecules? он- ООН- он20* ОНО*
Answers
Answer:
2ND ONE
Explanation:
The ion that is formed when the positive hydrogen ions from an acid bond to water molecules is он20* .
What is an acid?An acid is a substance that produces only hydrogen ions or oxonium ions in water.
The oxonium ions have the formula H3O^+ which corresponds to the formula он20* as shown.
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