The density of a gas is 4.00 grams per liter. Find the mass of the gas in a balloon that has a volume of 500 milliliters.
A.
B.
C.
D.
(2 Points)
20 grams
2.0 grams
0.002 grams
2000 grams

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

1000 mL = 1 L

500 mL = 0.5 L

We have

mass = 4 × 0.5

We have the final answer as

Hope this helps you

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e