What is the electron structure of a beryllium ion with a net ionic charge of + 2?

1s1

1s2

2s1

2s2

What is the molarity of a solution that is made by dissolving 3.68 g of sucrose (c12h22o11) in sufficient water to form 275.0 ml of solution?

Why do you think forensic scientists are so careful that the tests they do are sensitive, reproducible, and specific?

If earth was like an hard boiled egg which part of earth would the egg white reprsent?

What principle requires that a chemical equation be balanced?

A 2.50 L flask was used to collect a 1.65 g sample of propane gas,. After the sample was collected, the gas pressure was found to be 736 mmHg. What was the temperature of the propane in the flask

Which describes the polarity in a water molecule? a). partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms b).

To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperature of the balloon is 25 degrees celsius.

In which changes of state do atoms lose energy?

Can you live without body tissue? This is a yes or no question, no explaining required, but you can add it if you want. : D

According to the graph, which activity has used the largest amount of water over the past twenty years?