A piece of metal weighing 15.442 g is placed in 49.7 ml of ethyl alcohol (d = 798 g/ml) in a graduated cylinder. the alcohol level increases to 51.8 ml. the best value for the density of the metal from these data is:

Zn (s) + 2HCl (aq) - >ZnCl2 (aq) + H2 (g) Which statement is true at STP? (The atomic mass of Zn is 65.39 u.) 2 mol of HCl produce 1 L of H2 gas. 1 L of Zn produces 1L of H2 gas. 65.39 g of Zn produce 22.4 L of H2 gas.

Read the scenario. A balloon filled with air particles is held above a candle flame. What will happen as the air particles in the balloon experience an increase in temperature? (Select all that apply). 1.

A flexible container at an initial volume of 3.10 l contains 7.51 mol of gas. more gas is then added to the container until it reaches a final volume of 11.9 l.

Which statement about silver Ag metal is least reliable

What type of mountain are the andes mountains

7. Convert 158 g of C to moles.

How does molecular size affect solubility

Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining how this can be demonstrated.

For wach of the following cases, state whether the density of the object increases, decreases, or remains the same: (a) A sample of chlorine gas is compressed (b) A lead weight is carried up a high mountain. (c) A sample of water is frozen.

A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 0.