How many valence electrons does a nitrogen atom have?

Is borax solution (water and borax) a suspension or a mechanical mixture?

0.32 g of a walnut is burned under an aluminum can filled with 58.1 mL of water. The water temperature in the can increases by 3.1 °C. How many calories did the walnut release?

How many moles are in 2.35 x 10^21 Ba atoms

What does it mean for a solution to be in equalibrium

How do I find the mass of MgO2 in grams?

What are the products of photosynthesis? A. Glucose and oxygen B. Oxygen, solar energy, and glucose C. Carbon dioxide, water, and solar energy D. Hydrogen, oxygen, and carbon

A sample of a substance that has a density of 0.824 g/mL has a mass of 0.421 g. Calculate the volume of the sample.

The tyndall effect is used to detect A: suspensions B:liquid solitions C:tyndalls D:colloida

Which of the following is not an empirical formula? A. C3H8O B. Sb2S3 C. C2N2H8 D. BeCr2O7

The molar heat of fusion for water is 6.01 kJ/mol. How much energy must be added to a 75.0-g block of ice at 0°C to change it to 75.0 g of liquid water at 0°C?