How many molecules are there in 21.4 grams of Ca (OH) 2?

give a general description of the location of metals, non metals and metalloids on the periodic table

The specific heat capacity of gold is 0.128 J/g ºC. How much heat would be needed to warm 250.0 grams of gold from 25.0 ºC to 100.0 ºC? A. 2.4 x10-3J B. - 2.40 x 103J C. 2.40 x 103J D. - 2.40 x 10-3J

Name two bases which react with dillute sulfuric acid to give zinc sulfate

Determine whether each molecule is polar or nonpolar. a. scl2 b. scl4 c. brcl5

What causes the matter and energy for plate motion?

What types of rocks must form near Earth's surface?

Explain why an aqueous solution of Na2SO4 is neutral while an aqueous solution of Na2CO3 is basic in nature?

What mass of naturally occurring uranium is closer to 238 u, 235 u or 234 u?

A flask with a volume of 12.0 l contains 4.25 mol of oxygen gas at 15ºc. how many moles of nitrogen gas must be added to give a total pressure of 10.0

Which of the following states of matter has a definite shape? A. solids and liquids only B. liquids and gases only C. liquids only D. solids only