A substance has a volume of 20mL and a density of 2.5 g/mL. what is it's mass?

0.125 g

8 g

22.5 g

50 g

An ion has a charge of - 1. Which of the following electron arrangements could form an ion with this charge? 2,8 2,8,7 2,1 2.8

What is an ice age? Aa recent increase in the average global temperature near Earth's surface Ba period of time when temperatures across the planet are colder than normal Ca characteristic of winter that returns seasonally Dthe loss of heat in

Describe the difference between thermal energy and temperature.

A major component of gasoline is octane c8h18. when octane is burned in air, it chemically reacts with oxygen gas o2 to produce carbon dioxide co2 and water h2o. what mass of oxygen gas is consumed by the reaction of 6.0g of octane?

A quantity of 1.922 g of methanol (CH3OH) was burned in a constant-volume bomb calorimeter. Consequently, the temperature rose by 5.72°C. If the heat capacity of the bomb plus water was 9.

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.