A balloon now occupies 9.7L at 25.0°C and 1.00 atm. What temperature was it initially, if it occupied 9.0 L and was in a freezer with a pressure of 0.92 atm?

If an isotope of oxygen (O) has 1 less neutron, how many electrons does it have? and If an isotope of sodium (Na) has 2 extra neutrons, what is it's atomic weight?

What is the symbolic formula for acetocholine?

For the cells in a human body, an isotonic solution is 0.9% NaCl. If a red blood cell is placed in a 1% NaCl solution, what will happen to the cell?

Why are experimental investigations the best type of scientific investigation to demonstrate cause-and-effect relationships?

The reaction for the decomposition of ammonia can be written as shown below. If a student starts with 21.7 g of ammonia how many grams of hydrogen gas will be produced by the reactions? Why 2NH3 = N2 + 3H2 A. 1.28g B. 2.55g C. 3.85g D. 32.5g

Given a diprotic acid, H 2 A, with two ionization constants of K a1 = 3.0 * 10 - 4 and K a2 = 4.0 * 10 - 11, calculate the pH for a 0.117 M solution of NaHA.

The freezing and thawing action of water affects a rock by? A. Transforming the rock into igneous rock B. Chemically changing the rock C. Gradually breaking down the rock into smaller pieces D.

Explain why there is a difference in climate between areas at 0º latitude and areas at 45º latitude.

1/12 The two worlds of the chemist are the and a world. world. Submit Answer I don't know this

How many valence electrons does zinc oxide have?