Question

In a ventilated hood in a lab, a student heats barium metal over a flame, and it begins to react with oxygen gas in the air. A white crystalline compound begins to form on the burning barium.

2 Ba (s) + O2 (g) --> 2 BaO (s) = energy

Which statement best describes the reactants and products?

A. Equal numbers of barium atoms are in the reactants as in the products.

B. Fewer overall atoms are in the products than in the reactants.

C. Twice as many oxygen atoms are in the reactants as in the products.

D. More atoms are in the products than in the reactants.

Answer 1

Answer:

The statement best describes the reactants and products is :

A. Equal numbers of barium atoms are in the reactants as in the products.

Explanation:

The balanced equation is:

$2Ba(s)+O_{2}(g)\rightarrow 2BaO(s)$

The law of conservation of Mass = It states that mass can neither be created nor destroyed in a chemical reaction.

Total mass of the reactant must be equal to total mass of the reactants.

Or

Number of atoms of element in the reactant = number of elements in the product.

Every equation in the universe must follow the law of conservation of Mass.

Now , consider the reaction

$2Ba(s)+O_{2}(g)\rightarrow 2BaO(s)$

Reactants , here are : Ba and O2

Number of Ba = 2

O = 2

Products = 2 BaO

Ba = 2x 1 = 2

O = 2 x1 = 2

Total number of Ba in both product and reactant = 2

Total number of O in both product and reactant = 2

So, Option A is correct.

Equal numbers of barium atoms are in the reactants as in the products.

Answer 2

The statement which best describes the reactants and products is: A. Equal numbers of barium atoms are in the reactants as in the products.

What is LOCOM?

LOCOM is an acronym for law of conservation of mass and it states that mass is neither created nor destroyed in any chemical reaction. Thus, the mass of any substance in a balanced chemical equation would remain the same at the end.

According to the law of conservation of mass (LOCOM), the mass of all the reacting chemical elements of any substance must be equal to the mass of the product formed during a chemical reaction.

The properly balanced chemical equation for the reaction of barium metal and oxygen gas is written as follows:

                                       $2 Ba(s) + O_2 (g) \rightarrow 2 BaO (s)$

From the above chemical reaction, we can deduce that equal numbers of barium atoms are in the reactants as in the products in accordance with the law of conservation of mass (LOCOM).

Read more on LOCOM here: https://brainly.com/question/24783543