Which form of coal is used in explosives

Answers

Answer 1

Answer:

Answer: Coal Dust

Explanation: Grounded-up coal, coal dust, is used in explosives.

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Calorimetric studies show that the reaction is exothermic. 2NO2(g) N2O4(g) + 14.1 kcal. Based on this information, which one--if any--of the following additional changes would increase the molar concentration at equilibrium of N2O4(g)?
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In real life, a given system can approach equilibrium from different starting points but will still have the same equilibrium constant. How is this possible? Explain your answer in complete sentences.

Answers

In real life, a given system can approach equilibrium from different starting points but will still have the same equilibrium constant. It is because the rate of reaction for product formation and reactants forming is the same. It came to a point where their reaction attains equilibrium.

What is the molarity of a solution that contains 12 moles of cacl2 in 3 liters of solution?

Answers

Molarity is defined as the number of moles of solute dissolved in a volume of 1 L.
the number of moles of CaCl₂ present - 12 mol
Volume of solution - 3 L
Therefore if 3 L contains 12 mol of CaCl₂
then 1 L of CaCl₂ contains - $(12 mol)/(3 L)$ = 4 mol/L
Therefore molarity of CaCl₂ is 4 M

Formula for sulfur tetrafluoride

Answers

The answer is SFl4 tetra means four

Methane (CH4, 16.05 g/mol) reacts with oxygen to form carbon dioxide (CO2, 44.01 g/mol) and water (H2O, 18.02 g/mol). Assume that you design a system for converting methane to carbon dioxide and water. To test the efficiency of the system in the laboratory, you burn 5.00 g methane. The actual yield is 6.10 g water. What is your percent yield?

Answers

Answer:

The percent yield of reaction is 54.32%.

Explanation:

$CH_4+3O_2\rightarrow CO_2+2H_2O$

Moles of methane = $(5.00 g)/(16.05 g/mol)=0.3115 mol$

According to reaction, 1 mole of methane gives 2 moles of water .

The 0.3115 moles of methane will give:

$(2)/(1)* 0.3115 mol=0.623 mol$ of water

Mass of 0.9345 moles of water = 0.623 mol × 18.02 g/mol = 11.23 g.

Theoretical yield of methane = 11.23 g.

Experimental yield of methane = 6.10 g.

The percent yield of reaction:

$\%(Yield)=\frac{\text{Experimental yield}}{\text{Theoretical yield}}* 100$

The percent yield of reaction is :

$\%(Yield)=(6.10 g )/(11.23 g)* 100=54.32\%$

Answer:54.5

Explanation:

The elements that do not ordinarily form compounds area. elements in the carbon family.
b. metals.
c. halogens.
d. noble gases.

Answers

The elements that do not ordinarily form compounds are noble gases as they have complete octet.

What are elements?

An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number of the element.All atoms with same atomic number are atoms of same element.

Learn more about element,here:

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Noble gases, the have all 8 valence electrons so they do not have a need to bond

During a chemical reaction substances called reactants During a chemical reaction substance called reactants are combined to form a new substance called products which of the following are currently describes reactions and products of a chemical reaction

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Answer:

During a chemical reaction, substance called reactants are combined to form a new substance called products.

this sentence describes reaction and products of a chemical reaction

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A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?

Which is true about the temperature of a gas?At a higher temperature, the particles have a higher average kinetic energy. At a higher temperature, the volume of the gas is smaller. At a lower temperature, there are more particles in the gas. At a lower temperature, the particles in the gas move faster.

The hole in the ozone layer can lead to increases in skin cancer.a. Trueb. False