What is the mass of 4 moles of helium, He?

I am finding the formula of a compound that has 60% Carbon, 32% Oxygen, and 8% Hydrogen. Although, when it comes to actually creating the formula I end up with a subscript of 2.5 for C, 1 for O, and 4 for H.

In an exothermic reaction, the potential energy of the products is lower than that of the reactants. Which of the following is also true for an exothermic reaction?

Send Message 12 of 14 The gravitational force on the moon is 1.6 m/s2. If an astronaut has a mass of 84 kg on Earth, what will be his mass when he is standing on the moon? O A. 52.5 N OB. 84.0 N 0 C. 134.4 N OD. 823.2 N

A galaxy type that is spherical or oval in shape

In which location is most of the mass of our solar system? A. The asteroid belt B. Earth and the other planets C. The various D. The sun

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda