What is the formula mass (in amu) and molar mass (in g mol) for magnesium permanganate? A: 262.19; 262.19

Why was 2.303 multiplied in the equation? Where did that value come from? Why is the temp not 298.15 K?

Evaluate the following expression: 1.723 x 102 + 7.38 × 103

Which molecules are enantiomers? Which molecules are the same? (A). H Br

Estimate the value of62.273 × 4.137

Compute (4.29 x 105) · (1.89×10-4). Express your answer to three digits.

How do you convert 0.485L into mm using unit fractions?

where did the 0.0257 come from?

Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of the balloon and the mass of the air it displaces. That is, if the balloon occupies the same volume as 10 kg of air, but the balloon only weighs 2 kg, then the gas density kg 0.090 3 m H, balloon can lift 8 kg. Airships have sometimes been filled with hydrogen (H,), but hydrogen is very flammable, and kg 0.18 Не m after the Hindenburg caught fire and crashed in 1937 with serious loss of life airships have nearly always been filled with helium (He) instead. kg 1.23 3 m' air Suppose a new airship Star of Balogna will have the shape of a cylinder 100. m long, with a radius of 15.0 m, and will weigh 9400. kg without any gas inside it. Suppose also the average passenger weighs 81 kg. Calculate how many passengers the Balogna could carry if it were filled with hydrogen, and also if it were filled with helium. Passengers with H,: Passengers with He:

The world population is estimated to be 7.4 x 109. Nauru is the smallest island nation and comprises 1.5 x 10-4% of the world population. If the percentage of left-handed people is approximately 12%, estimate the number of left-handers on the island of Nauru.