1

An unknown substance has a hydronium concentration of [H3O+]=6.8 x

10^-11 M. What kind of substance is this?

A. acid

B. base

C. neutral

D. saline

How many atoms of hydrogen are there in one molecule of C3H5 (OH) 3?

45.1g + 1.786g = (calculator display) & (final answer)

Whats the atomic mass of an atom

How many milliliters of a 8.20 m licl solution contain 18.4 g of licl?

Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S (g) + 3F2 (g) - >SF6 (g) If 50 g S is allowed to react as completely as possible with 105.0g F2 (g), what mass of the excess reactant is left.

How many of the following elements have 2 unpaired electrons in the ground state? C Te Hf Si A) 1. B) 2. C) 3. D) 4.

Which has a higher frequency, a neutron or electron? Why?

1) Identify the intensive properties of a sample of matter: A. mass B. hardness C. color D. volume E. reflectivity

Suppose you have a buffer containing 0.400 M hydrazine and 0.300 M hydrazinium chloride at equilibrium. Then you add 25.2 g of NaOH to 2.0 L of the buffer. What change in pH is caused by the addition of the base? A) 0.99 B) 0.40 C) 8.71 D) - 0.36

The heart is an example of which level of organization within an organism? O cell organ tissue organ system O O