In an atom of argon-40, the number of protons

(1) equals the number of electrons

(2) equals the number of neutrons

(3) is less than the number of electrons

(4) is greater than the number of electrons

Which of the following substances is most likely to be a liquid at room temperature? a. formaldehyde, H₂COH₂CO b. fluoromethane, CH₃FCH₃F c. hydrogen cyanide, HCN d. hydrogen peroxide, H₂O₂H₂O₂ e. hydrogen sulfide, H₂S

Describe how to convert between mass and the number of moles of a substance.

Ammonium carbamate (NH2COONH4) is a salt of carbamic acid that is found in the blood and urine of mammals. At 250.°C, Kc = 1.58 * 10-8 for the following equilibrium: NH2COONH4 (s) ⇌ 2 NH3 (g) + CO2 (g) If 11.51 g of NH2COONH4 is put into a 0.

Consider a 1.24 g mixture of magnesium nitrate and magnesium chloride. After dissolving this mixture in water, 0.500 M silver nitrate is added dropwise until precipitate formation is complete. The mass of the white precipitate formed is 0.419 g.

The radius of a hydrogen atom is 37 pm and its mass is 1.67 * 10-24 g. What is the density of the atom in grams per cubic centimeter? Assume the atom is a sphere with: Volume = (4/3) (3.14) (r^3)

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.

How are linear and nonlinear graphs alike

Uranium nuclei split during nuclear fission true or false

Calculate the mass of 2.25*10^22tungsten atoms.

Which weathering process involves physical forces but not chemical reactions or dissolving of minerals