Which of the following elements have the highest electronegativity?

a) F

b) N

c) Br

d) Cs

e) Al

A combination of chemical symbols and numbers that shows what molecule is made of

How many moles of copper atoms are in 150g of copper metal

During chemistry lab, Maria places sucrose in a glass beaker, adds water, and stirs. As the table sugar disappears, she loudly proclaims that she has chemically broken down the sucrose into fructose and glucose.

Which of the following you do NOT need to pay attention while using a centrifuge? Use the correct correct centrifuge tube Balance the centrifuge tube with the same amount of liquid Secure the centrifuge lid The radius of the centrifuge Use the

Which of the following is a physical change? explosion rotting of food evaporation rusting of iron

What is meant by "pressure of the atmosphere?" What causes this pressure?

A substance is analyzed and found to contain 85.7% carbon and 14.3% hydrogen by weight. A gaseous sample of the substance is found to have a density of 1.87 g/L, and 1 mol of it occupies a volume of 22.4 L.

Which property of a mineral sample does not influence how quickly it settles in water? 1) density 2) hardness 3) shape 4) size

Dinitrogen difluoride gas is collected at in an evacuated flask with a measured volume of. When all the gas has been collected, the pressure in the flask is measured to be.

How is the mass number of an isotope expressed in the name of an atom?