An atom of oxygen has atomic of 8 and a mass number of 18. How many of each type of subatomic particle doe it contain?

Why does a cell make a copy of its DNA before it dvides?

Harry put 20 mL of water in a beaker and wanted to track how the water evaporated each day. What would be the best estimate as to the amount of water left in the beaker at the start of day 5?

An athlete is running a 5-km race at am average speed of km/h. She has to stop to tie her shoe. After tying her shoe, she continues running at 8km/h. Why would her average speed for the entire race be less than 8km/h

When the heat of reaction (H=ve), the reaction is Endothermic reaction True False

What is the concentration of h + ions in a 2.20 m solution of hno3?

Which statement correctly describes the interaction between magnetic poles? North and south poles attract each other. North and south poles repel each other. Two north poles will attract each other. Two south poles will attract each other.

You are measuring the mass of various shapes objecys and identifying their shaped ypu then record the qualitative and quanatitave data in a table is qualitataive wnd which is quatitaive

A positively charged wire is attracted to a negatively charged piece of metal. What force causes this?

Two identical atoms from Area B bond together. What type of bond will they most likely form A. Electrostatic B. Metallic C. Ionic D. Covalent

Which would be the best way to represent the concentration of a 1.75 M K2CrO4 solution? 1.75% K2CrO4 [K2CrO4] (K2CrO4) K2CrO4, [M] = 1.75