White powder, when heated, produces a colourless gas and a black solid. Is the white powder and element?

The molecular mass of methyl ethanoate is 74.1 amu. calculate the molecular mass of propanoic acid, an isomer of methyl ethanoate. express your answer with the appropriate units.

Using this equation 2H2+O2->2H2O when 47g of water are produced, how many grams of hydrogen must react

How many moles are there in 135g of aluminum?

Baking soda is an example of a

Which of the following should most favor the solubility of an ionic solid in the water? Note: high and low refers to the magnitudes (i. e. the absolute value) of lattice and hydration energies.

On melting of ice, there is a decrease in volume instead of increase. Why?

When a dolphin jumps, it moves its muscles and chemical potential energy is converted to kinetic energy. Some of this energy is lost to the dolphin. Explain why this phenomenon does not violate the Law of Conservation of Energy.

If a bat with a mass of 5 kg and acceleration of 2 m/s2 hits a ball whose mass is 0.5 kg in the forward direction, what is the reaction force of the ball on the bat? A) 0 N, forward B) 10 N, forward C) 10 N, backward D) 0.5 N, upward

Which statement best explains why heating a liquid affects its viscosity?

Calculate the ph of a 3.78*10-3 m solution of naf, given that the ka of hf = 6.80 x 10-4 at 25°c.