Mid Quarter 1 Test Review How many protons

Mid Quarter 1 Test Review

How many protons, neutrons, and electrons are in an atom of 40 Ar?

What information can be derived from a mass spectrum for one particular element?

Calculate the percent by mass of hydrogen in ascorbic acid, HC 6 H 7 O 6.

How many hydrogen atoms are present in 1. 00 mg of aspartame, C 14 H 18 N 2 O 5?

Ca. H 2 + 2 H 2 O Ca(OH)2 + 2 H 2 How many grams of calcium hydride are needed to form 8. 500 g of hydrogen?

Write the net ionic equation for the precipitation reaction between solutions of iron(II) nitrate and potassium hydroxide.

If 2 moles of solids were added to 100 m. L of water, which of the following solutions would have the largest concentration of solvated protons? Explain. HI OR HF

3 Fe(NO 3)3 + 2 Al 3 Fe + 2 Al(NO 3)3 What is the substance reduced?

2 HCl + Mg(OH)2 2 H 2 O + Mg. Cl 2 What volume in m. L of 0. 128 M HCl is needed to neutralize 2. 87 g of Mg(OH)2?

Menthol is composed on C, H, and O. A 0. 1005 -g sample of menthol is burned in air producing 0. 2829 g of carbon dioxide and 0. 1159 g of water. Menthol’s molar mass is 156 g/mol. What is its molecular formula?

A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. Based on these observations, can we determine whether solids A and B and the gas C are elements or compounds? Explain your conclusions.