A 40 g sample of water at an inital temperature of 40°C is heated to 99°C. How much heat did the water absorb? The specific heat of water is 4.18J/gºC

a. 413.82j

b.-9864j

c. 9864.8j

d.-413.82j

Is a stick of dynamite potential energetic or kinetic

What happens when two forces act in the same direction? A. They cancel each other out. B. The stronger one prevails. C. Their strengths are added. D. Their sum divided by two is the total force.

A chemist adds of a M zinc nitrate solution to a reaction flask. Calculate the mass in grams of zinc nitrate the chemist has added to the flask. Round your answer to significant digits.

Fluoridation of city water supplies has been practiced in the United States for several decades. It is done by continuously adding sodium fluoride to water as it comes from a reservoir.

Write the proper word equation to express the following chemical reaction: 3Li (s) + AuCI3 (aq) - > 3LiCI (aq) + Au (s)

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