A substance has a volume of 20mL and a density of 2.5 g/mL. what is it's mass?

0.125 g

8 g

22.5 g

50 g

If a nail made of elemental iron [Fe (s) ] is placed in an aqueous solution of a soluble palladium (II) salt [Pd2 + (aq) ], the nail will gradually disappear as the iron enters the solution as Fe3 + (aq) and palladium metal [Pd (s) ] forms.

H, N, Si, Al, Mg, O a) identify the two elements which react together to form a molecule with the same shape as methane molecule. b) Identify the two elements which form an ionic compound with a formula of type X2Y3, where X is a metal.

Predict how the addition of a catalyst would affect the rate of the reaction below, and explain your prediction. h2 (g) + i2 (g) 2hi

The compound diborane (b2h6) was at one time considered for use as a rocket fuel. its combustion reaction is b2h6 (g) + 3 o2 (â) â 2 hbo2 (g) + 2 h2o (â) the fact that hbo2, a reactive compound, was produced rather than the relatively inert b2o3 was

Three facts about the troposphere

1. Simplify. | A. O 16 B. O C. 04 D. O

What is the (H+), if the pH of a solution is 3.20?

In an open system, the vapor pressure is equal to the outside air pressure. T or F?

Could acetic acid be used in the esterification, instead of acetyl chloride? Why or why not?

9. In a sample of gas, what causes pressure? Answer in a completesentence.