Which of the following elements is a noble gas?

a. rb

b. mn

c. cl

d. kr

If 5400. Joules of energy were supplied to 4.5 grams of ice at - 10 degree Celsius, how many grams of what phases would you have?

UU 7. This element is one of the lanthanides. You've probably never heard of it before, but it can be magnetized better than iron. Find Sm. What is this name of this element?

In the Tour de France, cyclists ride 3653.6 km over days. How many miles do they do?

Which is a element of the atoms

What can happen due to competition with a population?

A container with a volume of 3.46 liters contains a gas at a pressure of 1.30 atmospheres and a temperature of 274.27 Kelvins. How many moles of gas are in the container?

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?