Is a small whole number that appears in front of a formula in a chemical equation?

What is the volume of 7.25 g of oxygen gas at STP?

Think about a large pitcher of ice water and a small cup of ice water with a similar temperature. Which statement about these objects is true? A. Each has the same thermal energy because each has the same temperature. B.

a sample of gas has a volume of 12.0 L and a pressure o 1.00 atm. If the pressure of gas is increased to 2.00 atm, what is the new volume of gas if the temperature. stays constant?

How many moles are 8.8 grams of CO2?

The atoms in a copper bar are held together by a metallic bonding. what would happen if you ran over the copper bar with a car?

How many elements are in one molecule of Methane? How many elements are in one molecule of Ammonia? How many elements are in one molecule of Vinyl Alcohol? How many elements are in one molecule of Ethylene?

A banana split contains 1.12 million calories. What is the energy value in kilojoules? a. 1.12 kJ b. 4.686 x 10^3 kJ c. 4686 kJ d. 2.68 x 10^5 kJ e. 268 kJ

2 grams of a substance was dissolved in 75.0 g of water resulting in a temperature decrease from 23.1 ⁰C to 18.7 ⁰C. The specific heat of the solution is 4.18 J/g·⁰C. Calculate the amount of heat associated with the water.

Why do you think the soccer ball fell more slowly than the golf ball

Which of the following is an example of chemistry research in the main area of energy?. a. producing bioplastics. b. specific reactions between prescription drugs and chemicals in cells. c. developing rechargeable batteries. d.