What powers explosions and fire

Answers

Answer 1

Answer: Almost always oxidation,
the speed of the reaction is the big difference between fire and explosions
(and slower yet - the "respiration" reactions that keep you alive).

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Repulsion is a force or interaction among the atoms in a molecule in which the atoms attract one another. a. True
b. False

Answers

Repulsion is a force or interaction among the atoms in a molecule in which the atoms REPEL one another. By the word itself repulsion, meaning to repel, it automatically bans the idea of ATTRACTION. Therefore, the statement above is FALSE. The answer to this question is "B. False".

A solution of H2SO4 with a molal concentration of 5.25m has a density of 1.266 g/ml. what is the molar concentration of this solution?

Answers

There are a number of ways to express concentration of a solution. This includes molarity and molality. Molarity is expressed as the number of moles of solute per volume of the solution while molality is expressed as the number of moles solute per mass of solution.

Molarity = 5.25 mol / kg solution (1.266 kg / L) = 6.65 M

The recipe for pumpkin pie calls for 3 tablespoons of flour and 1.5 cups of sugar for each pie. Which of the following conversion factors would be used to find out how many pies could be made from 7.5 cups of sugar.

Answers

Answer:

5 pumpkin pies could be made with 7.5 cups of sugar.

Explanation:

The conversion factor to solve the problem is:

$7.5 cups of sugar*(1 pie)/(1.5 cups of sugar) = 5 pies$

Na+ + Cl– NaCl Which statement best describes the relationship between the substances in the equation?

Answers

Answer : The number of sodium ions is equal to the number of formula units of salt.

Explanation : In the given reaction of NaCl the statement which describes it the best is that the number of sodium ions is found to be same along with the formula units in the product side.

$Na^(+)$ + $Cl^(-)$ ----> NaCl.

Its clear from the equation that one mole of Na and one mole of Cl combines together to give the product, which is one mole of NaCl. The number of ions on both the sides are equal.

The correct answer for the question that is being presented above is this one: "The number of sodium ions is equal to the number of formula units of salt." The statement that best describes the relationship between the substances in the equation is that the number of sodium ions is equal to the number of formula units of salt.

An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. Which element is element X?

Answers

Element X is sodium. Sodium has one less valence electron than beryllium and it has the electron configuration of 2,8,1, thus it has one more shell of electrons.

Answer:

sodium

Explanation:

As the number of effective collisions between reacting particles increases the rate of reaction

Answers

the rate of reaction increases

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