Given the equation zn (s) + 2 hcl (aq) → zncl2 (aq) + h2 (g), what mass of hydrogen gas is produced when 2.8 g zn is reacted with excess aqueous hydrocholric acid?

Two liquids that are soluble in each other in any proportion are said to be what?

What is the name of the compound Ca (NO3) 2? A. calcium nitride B. calcium nitrate C. calcium nitrite D. calcium nitrile

What is this element 1s22s22p6?

What do we call elements that always travel in pairs?

A solution a) has a heterogeneous composition and is able to be separated by physical means b) has a uniform composition and is only able to be separated by chemical means c) has a uniform composition and is able to be separated by physical means d)

Sound waves travel fastest through? A.) Air B.) Steel C.) Water D.) Vacuum

Which of the following combinations will result in a reaction that is never spontaneous? 1) positive enthalpy change and positive entropy change 2) positive enthalpy change and negative entropy change 3) negative enthalpy change and positive entropy

Which of the formed elements is present in the greatest concentration?

A compound has a percent composition of 24.74% potassium (molar mass = 39.10 g/mol), 34.76% manganese (molar mass = 54.94 g/mol), and 40.50% oxygen (molar mass = 16.00 g/mol).

What would be the saturation concentration (mole/L) of oxygen (O2) in a river in winter when the air temperature is 0°C if the Henry's law constant at this temperature is 2.28 * 10-3 mole/L-atm? What would the answer be in units of mg/L?