2 years ago

A 12.2-g sample of x reacts with a sample of y to form 78.9 g of xy. what is the mass of y that reacted?

1 answer:

4 0

We will assume that the only reactants are x and y and that the only product is xy.

Based on the law of mass conservation, mass is an isolated system that can neither be created nor destroyed.

Applying this concept to the chemical reaction, we will find that the total mass of the reactants must be equal to the total mass of the products,
therefore:
mass of x + mass of y = mass of xy
12.2 + mass of y = 78.9
mass of y = 78.9 - 12.2 = 66.7 grams

You might be interested in

Given the statements:

olga nikolaevna [1]

C. The salt bridge maintains the flows of ions and allows electrons to move from the anode to the cathode.

3 0

2 years ago

Read 2 more answers

Justin is making a snack. He toasts a piece of bread and spreads peanut butter and jelly on it. Then he cuts an apple into sever

Leona [35]

Answer:

One chemical change- It was when he toasted the bread. The heat changed the bread so that it has the crust on the outside.

Explanation:

6 0

2 years ago

Read 2 more answers

A 60.0 mL sample of 0.250 M NaOH is added to a beaker containing 125 mL of 0.120 M HOCl. Ka for HOCl is 3.5 x 10-8 at 25o C. Fin

pishuonlain [190]

Answer: pH = 1.1

Explanation: see attachment

7 0

2 years ago

Which techniques would be best for separating a colloid mixture but would not work well with solutions? Check all that apply.

kotegsom [21]

Answer:

b, c, f,

Explanation:

5 0

1 year ago

Read 2 more answers

Which compound(s) contain the most hydrogen atoms per molecule or formula unit? hydrogen selenide ammonium bromide strontium dih

igomit [66]

The answer is strontium dihydrogen phosphate

That is strontium dihydrogen phosphate, is the compound containing the most hydrogen atoms per molecule or formula unit.

The formulas of the following compounds are as follows:

Hydrogen selenide H₂Se

Ammonium bromide NH₃Br

Strontium dihydrogen phosphate Sr(H₂PO4)₂

Sodium bicarbonate NaHCO₃

As it can be seen from the formula of strontium dihydrogen phosphate Sr(H₂PO4)₂ , that it contains the most hydrogen atoms per molecule or formula unit.

3 0

2 years ago