The molarity of a solution prepared by dissolving. 50 g of nacl in 100 ml water is?

What happens to the reactivity of metals from left to right across the periodic table?

1. If you increase the air temp. a crickets chirp will A) decrease B) increase C) stay the same 2. If you double the air temp. the chirp rate will A) double B) be halved C) remain the same D) all of the above 3.

This unbalanced equation describes a redox reaction. what is the total increase in oxidation number of the species being oxidized? fe2o3 (s) + co (g) → fe (s) + co2 (g) + 1 + 2 + 3 + 6 description

insert the missing coefficients in the following partially balanced chemical equations S+6HNO=HSO4+NO+H2O

A sample of gas confined in a cylinder with a movable piston is kept at constant pressure. The volume of the gas doubles when the temperature of the gas is changed from (1) 400. K to 200. K (3) 400.°C to 200.°C (2) 200. K to 400. K (4) 200.°C to 400.

Mr Smith is walking his dog. He walks for 5 minutes (300 seconds) at a speed of 1.5 m/s. His dog runs at a speed of 5 m/s for the same time. a How far does Mr Smith walk? b How far does the dog run?

Gasoline has a density of 0.749 g/mL. How many pounds does 19.2 gallons of gasoline weigh? Use significant figures. Do not enter "pounds" as part of your answer.

Which of these changes involved a physical change and not a chemical change?

Which of the following statements is true? Running an electric current through a magnet can create a magnetic field. Electric engines change electricity into magnetism. The strength of a magnetic field increases with distance.

valancy of x is 3 while that of y is 1. write a formula of the compounds when each of the seperaty combines with oxygen