How much heat, in calories, is given off when 1.25 grams of silver is cooled from 100.0°C to 80.0°C? (The specific heat of silver is 0.057 cal/g°C)

1.43 cal

0.0713 cal

5.70 cal

7.13 cal

0.314 g of a certain nonelectrolytic solute is dissolved in 2.95*102 mL of H2O. The osmotic pressure of this solution is 2.49*102 torr at 21.0 °C. Calculate the molar mass of the solute. (760 Torr = 1 atm)

Which of the following is an example of a compound? H2O Na Cl O

Calculate the width of the cheek cell in micrometers

What is the atomic number of xenon, the fifith element in group 18?

What are the properties of metal, nonmetal, and mellaloids

A (1. pathogen 2. Germ 3. Bacterium) is an agent that causes disease. All (1. bacteria 2. fungi 3. Viruses) are pathogens.

Calculate the solubility (in g/l) of calcium fluoride in water at 25°c if the ksp for caf2 is 1.5 * 10-10.

Distinguish between the terms accuracy and precision. In general, explain why a precise measurement does not always guarantee an accurate result.

Does it require more energy to melt an ionic compound or dissolve it in water? It requires much more energy to melt it. It takes about the same amount of energy. It requires much more energy to dissolve it. Ionic compounds are insoluble in water.

Which element has an ion that is smaller than an ion calcium? Potassium, strontium, cesium, magnesium