Which of the following reactions obeys the Law of Conservation of Atoms?

H2O → H2 + O2

CuSO4 + Zn → ZnCl2 + Cu

Zn + HCl → ZnCl2 + H2

PbCl2 + Al → AlCl3 + Pb

Zn + 2HCl → H2 + ZnCl2

How much energy (in JJ) is lost when a sample of iron with a mass of 29.2 gg cools from 79.0 ∘C∘C to 27.0 ∘C∘C?

Which has more energy water at 100°C or water vapor at 100°C

If the initial concentration of xy is 0.050 m, what is the concentration of xy after 55.0 s?

In maintaining proper acid-base balance, protein acts as

The formula C2H4 can be described as

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.

A gene is a to a chromosome as (A) a pea is to a pod (B) a front to a back (C) a bike is to a car (D) a building is to a window

How are you enjoying this weather? (i need good reasons}

In today's experiment, some lab students let their chromatograms elute slightly longer than others. If one student's solvent front traveled to 9.80 cm, and another student's solvent front traveled 8.

What does squeezing do to the particles of snow or ice?