A swimming pool is 50 meters long. each day a swimmer swam total of 75 lengths of the pool for practice. how many kilometers did he swim over a 15 day period?

An aqueous solution contains 32.7% kcl (weight/weight %). how many grams of water are contained in 100 g of this solution

A 200. mL balloon of helium gas has a temperature of 293K. What is the temperature of the helium balloon if the volume expands to 600. mL? a 879 mL b 60.0 mL c 273 mL d 410. mL

Decode the following message. using the atomic number plus the highest principle quantum number = 5, 30, 58, 56, 99, 79, 19, 98, 9

True or False: Natural Gas is a renewable resource?

In a particular gravimetric analysis, the precipitate of caso4 was weighed before it was completely dried. the likely impact of this error on the calculated moles of caso4 will be:

Galena, a mineral of lead, is a compound of the metal with sulfur. Analysis shows that a 234-9 sample of galena contains 203 g of lead.

What is the relative charge carried by an electron

Which term best describes the type of bonding in magnesium chloride

This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat a. an exothermic reaction b. an endothermic reaction c. absorption reaction d. precipitation reaction

Given the balanced equation representing a reaction: C3H8 (g) + 5O2 (g) = = >3CO2 (g) + 4H2O (g) What is the total number of moles of O2 (g) required for the complete combustion of 1.5 moles of C3H8 (g) ? (1) 0.30 mol (3) 4.5 mol (2) 1.5 mol (4) 7.