If an atom has an atomic number of 15 and an atomic mass of 31, how many protons, neutrons and electrons does the atom contain?

Table salt and water are examples of

How is petrol separated from the mixture of hydrocarbons in crude oil?

Tuning a musical instrument like a guitar change the what?

In one or two sentences, summarize what happens during each of the two stages of cellular respiration.

You move a book 100 centimeters with a force of 15 newtons. How much work did you perform?

At a certain temperature, 0.4011 mol of N 2 and 1.501 mol of H 2 are placed in a 3.00 L container. N 2 (g) + 3 H 2 (g) - ⇀ ↽ - 2 NH 3 (g) At equilibrium, 0.1801 mol of N 2 is present. Calculate the equilibrium constant, K c. K c =

How many moles of N are in 0.203 g of N2O?

Given the unbalanced equation: al + cuso4 - - > al2 (so4) 3 + cu. when properly balanced, the sum of the balancing coefficients is select one: a. 7 b. 6 c. 9 d. 8

A particle that has a negative charge is called

Which group of elements will readily lose one electron to meet the octet rule? Alkaline Earth Metals c. Halogens Alkali Metals d. Both A and B