How much salt is in 300 g of a 3.5 % solution of salt water?

Which of the following best accounts for the difference in mutagenic activity between PAHs and PAHs plus liver preparation? a.

A precipitation reaction is caused by mixing 100. mL of 0.25 M K2Cr2O7 solution with 100. mL of 0.25 M Pb (NO3) 2 solution. When the precipitate forms, it is filtered from the mixture.

How many moles of calcium carbonate-CaCO3 = 4.15 g

The reaction between ethanoic acid and solution hydroxide is an example of

The specific heat of gold is 0.031 calories/gram C. If 10.0 grams of gold were heated and the temperature of the sample changed 20.0C, how many calories of heat energy were absorbed by the sample?

How did primo levi use his chemistry to survive Auschwitz?

Calculate the percent yield when 500 grams of carbon dioxide react with an excess of water to produce 640 grams of carbonic acid. CO2 + H2O - --> H2CO3

Which of the following is a possible equivalence that can be used in a conversion? A. ten to the negative second power hL over one L B. ten to the negative second power cL over one L C. ten to the first power L over one daL D.

Which process is a chemical change? burning a match boiling water melting ice breaking glass

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid