What is the mole to mole ratio between nitrogen gas and hydrogen gas

Explain why the atmosphere is classified as a mixture

What are two ways in which minerals can form from a solution?

Four of the following pairs of acids list the weaker acid at the left and the stronger acid at the right. Which pair is reversed? Weaker Acid Stronger Acid (a) HIO3 HClO3 (b) HNO2 HNO3 (c) H3PO4 HNO3 (d) H3PO4 H3AsO4 (e) HBrO3 HClO3

Janelle is observing a sample of matter. She notes that it is a shiny silver-colored solid, has a mass of around 20 grams, and conducts heat and electricity well.

Write the name of the chemical missing in this equation calcium carbonate + hydrochloric acid - -> calcium chloride + water + ... A) hydrogen B) oxygen C) nitrogen D) carbon dioxide

Evaporating water is an example of a physical change because

Given the number of mols equal to 1.28 and the molarity equal to 3.4M, determine the number of liters of solution

How many moles are in 36 g of Beryllium (Be) ? a. 0.25 mol b. 4.0 mol c. 45.0 mol d. 320 mol

Under which conditions can an eclipse occur? sun blocks Earth moon blocks the sun moon blocks Earth sun blocks the moon

In DNA, what base pairs with cytosine? A. adenine B. cytosine C. guanine D. thymine