What is an ion?

in chemistry

A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21 °C. After combustion of the french fries, the water has a temperature of 48 °C. What is the caloric value (kcal/g) of the french fries?

When you squeeze an air-filled ball, why is that it returns to its original position when you let go?

Which of the following forms a new substance? melting, evaporating, freezing or burning

After the universe was created, what was formed? (Choose all that apply.) Question 3 options: time space matter energy

Why is charcoal black? Question options: Charcoal has a black-colored pigment. Charcoal reflects black-colored light. Charcoal absorbs all wavelengths of light that fall on it. Charcoal reflects all wavelengths of light that fall on it.

What does mass is conserved in a chemical reaction mean

Which atom has a nucleus that contains 13 protons and 14 neutrons 1. Mg 2. Be 3. Al 4. N

Determine the oxidation state of the metal ion in [co (nh3) 5br]2+. express your answer as an integer.

Which functional group contains oxygen atom? a. Carbonyl group b. Amino group c. Sulfhydryl group

A mountain is a example of solid?