A5.0 - gram sample of zinc and a 50.-milliliter sample of hydrochloric acid are used in a chemical reaction. which combination of these samples has the fastest reaction rate?
1. a zinc strip and 1.0 m hcl (aq)
2. a zinc strip and 3.0 m hcl (aq)
3. zinc powder and 1.0 m hcl (aq)
4. zinc powder and 3.0 m hcl (aq)

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign