General Chemistry Answers

what type of reaction is Na2O + H2O 

A chemical reaction requires 6.00 moles of Fe(NO₃)₃. What mass of Iron (III) Nitrate is needed?

A solution of ethanol is prepared by dissolving 25.0 ml of ethanol in enough water to give a total volume of 250.0 ml. What is the percent-by-volume concentration of ethanol?

Nitrogen monoxide reacts with oxygen according to the following reaction: 2NO(g) + O₂(g) --------- 2NO₂(g). If 12 moles of nitrogen monoxide are combined with 10 moles of oxygen, how many moles of NO₂ should form?

Iron metals react with hydrochloric acid ass follows:

2Fe(s) + 6HCl(aq)------- 2FeCl₃ (aq) + 3H₂(g). If 22.4g of iron reacts with excess HCl, and 59.4g of FeCl₃ are collected, what is the percent yield of Al₂(SO₄)₃

A 200.0 g sample of river water contains 6.5mg of lead. How many parts per million of lead are in the sample?

If the molar mass of the substance is 20.0 g/mol, what is the mass of 3.01 x 10²⁵ molecules of the substance?

What volume of CO₂ would be formed if 5.00 L of propane burns, assuming that all of the gases are under the same conditions.

Given a fixed amount of gas held at constant pressure, calculate the temperature to which the gas have to be changed if a 1.75 L sample at 23.0 degrees celsius were to have a final volume of 3.5 L

A 500 cm cube vessel contains Hydrogen gas at 400 torr and another 1 dm cube vessel contains oxygen gas at 600 torr . If these gases are transferred to 2 dm cube empty vessel , calculate the total pressure of the mixture of gases .