When an excited electron in an atom moves to the ground state, the electron ...

What is the def of chemical equation

What metric unit is used for measuring an eyelash?

In a redox reaction, what role does the reducing agent play? A - It gives up electrons B - It keeps its electrons C - it takes electrons D - it takes oxygen atoms

3. Which of the following could be a consequence of exercising and sweating on a day that's already hot? O A. Hypothermia O B. Heart attack O C. Heatstroke O D. Hypothalmia Mort for MAM bebisbliebted on the

60.0 mL of 0.100 M Ca (OH) 2 solution is mixed with 50.0 mL of 0.100 M HNO3. Calculate the volume of 0.100 M H2SO4 needed to neutralize the resulting mixture.

How many atoms of Hydrogen are in 67.2 L of H2 at STP?

If a 45 mM phosphate solution (solution A) had an absorbance of 1.012. What would be the absorbance if 11 mL of solution A was used to prepare a 20.0 mL of a new phosphate solution. Write answer to three significant figures.

Which choice best describes the specific heat of water compared with that of metals? A) The specific heat of water is less than the specific heat of metals. B) The specific heat of water is about the same as the specific heat of metals.

Which of the following answer choices best describes J. J. Thomson's plum-pudding model? An atom is surrounded by a firm outer shell and contains positively charged particles in its core.

A series of enzymes catalyze the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. What is substance X?