Helium has two protons, two neutrons and two electrons. what is the charge of this atom?

a. 0

b. 2

c. 4

d. more information is needed.

The reaction between ethyl bromide (C2H5Br) and hydroxide ion in ethyl alcohol is shown below at 330 K. C2H5Br (alc) + OH - (alc) → C2H5OH (l) + Br - (alc) The reaction is first order each in ethyl bromide and hydroxide ion. When [C2H5Br] is 0.

Explain why molybdenum is malleable?

Calculate the number of kg, g, and mg in 1/4 lb of margarine

The ionic charge of an element in Group 6A is 2-. -True -False

Which event occurs during a high tide?

2K3N + 3CaCrO4 → Ca3N2 + 3K, CrO Give the formula for the second reactant: How many potassium atoms on the reactant side: How many oxygen atoms on the product side?

Why does aluminum most often have an oxidation state of + 3

In the thermal decomposition of copper carbonate, the black solid left behind weights less than the original copper carbonate. Why?

How many joules are needed to warm 675 grams of water (specific heat = 4.186 J/g degrees Celsius) from 12 degrees Celsius to 85 degrees Celsius?

Pentaborane b5h9 (s) burns vigorously in o2 to give b2o3 (s) and h2o (l). what is δh° for the combustion of 1 mol of b5h9 (s) ? substance δh°f (kj/mol) b2o3 (s) - 1273.5 b5h9 (s) + 73.2 h2o (l) - 285.8