Why does a weather balloon filled with Helium rise? (Refer to "Densities of Common Substances" table.)

a) Its density is greater than air.

b) Its density is less than air.

What size container do you need to hold 0.0459 mol of N2 gas at stp

If 2.29 kg of hydrazine are used in a rocket engine and 3.14 kg of oxygen are available for reaction, Determine the limiting reactant, amount of reactant in excess, mass of each product formed

Hey! Can I get all the chemicals formula from ch-4 carbon and it's compound ...

Which statement is true about the gravitational force? A. It only acts on objects that are close to each other. B. It acts on all objects all of the time. C. It only acts on objects that are in contact. D.

Water is known as a polar molecule because check all that apply. the oxygen atom has a greater attraction for electrons than the hydrogen atom does. the hydrogen atom attracts electrons much more strongly than the oxygen atom.

What elements are found in a 9 volt battery

Predict the empirical formula of these compounds. a. C2N2. b. P4O10. c. N2O5. d. NaCl. e. C9H20. f. B2H6. g. K2Cr2O7. h. Al2Br6. i. C6H6. j. SiCl4

What happens when the cold finger is placed in the hot water? what direction did the heat travel from the hot water?

For a neutral Nitrogen, how many electrons are in the 2p electron orbitals?

A neutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and electrons are found within the atom?