Which statement best describes a mole?

In 1993 the Minnesota Department of Health set a health risk limit for chloroform in groundwater of 60.0 g/L Suppose an analytical chemist receives a sample of groundwater with a measured volume of 79.0 mL.

Which statement best describes the difference between a scientific theory and a scientific law A. A scientific theory is supported by more data than a scientific law. B. A scientific theory can be explained observations. C.

A scientist measures the pH of some rainwater and finds that it is acidic. Which pH corresponds with the acidic quality of the rainwater? A. 6 B. 7 C. 8 D. 9

Which of the following statements is a qualitative observation? A. The branch is three meters long. B. The substance tastes bitter. C. There are eleven students absent. D. The beaker contains four hundred milliliters of an unknown liquid.

The specific heat of a certain type of cooking oil is 1.75 j / (g·°c). how much heat energy is needed to raise the temperature of 2.83 kg of this oil from 23 °c to 191 °c?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda