In a calorimeter, 6.68 kJ of heat was absorbed by 20 g of ice. What is the enthalpy of fusion of the ice? q=m∆ahf

As the sun gets higher in the sky, your shadow gets longer.

A planet similar to Earth has four moons roughly the same distance away. The moon that will MOST affect tides on the planet is the one that has the greatest A) mass. B) volume. C) density. D) amount of water.

Ba (CN) _ What is the compound

Convert this to metric units 0.000238 m to cm

How many moles of magnesium are added to a test tube if Micah and his lab partner could count the number of atoms in the piece of magnesium ribbon to be 1.50 X 1023?

What is the compound name for NF

A main goal of most environmental scientists is to achieve? A - biodiversity B - cost-benefit balance C - sustainability D - supply and demand

Theo is skiing with his friends when he sees an avalanche warning sign. What type of hazard is this? A. Biological B. Chemical C. Social D. Physical

A red blood cell contains 4.0 107 free electrons. what is the total charge of these electrons in the red blood cell?

The coefficients in a chemical equation? A; show the valence electrons for each atom B; are the molar masses of the substances C; show the number of grams of each substance that react D; indicate the number of moles of each substance that react