When you turn on a battery powered flash light you transform what two kinds of energy

Which of the following processes is exothermic? which of the following processes is exothermic? the chemical reaction in a "cold pack" often used to treat injuries the vaporization of water?

Given the following equation: Cu + 2 AgNO3 → Cu (NO3) 2 + 2 Ag How many moles of Cu are needed to react with 3.50 moles of AgNO3? mols

How is the atomic mass of an element calculated? A. by determining the number of electrons in the outer orbital B. by determining the number of protons in the nucleus C.

Condensation is the change from liquid to water cycle

How many molecules are in 237g (about a cup of water)

If you wanted to study the science of describing, naming, and classifying organisms, what would you study?

The specific heat of silver is 0.234 j / (g·c). calculate the amount of energy that is needed to raise the temperature of 175 g of silver from 22.5°c to 40.0°c.

Gypsum is hydrated calcium sulfate. a 4.89 g sample of this hydrate was heated. after the water was removed, 3.87 g anhydrous calcium sulfate remained. determine the formula of this hydrate and name the compound.

A chemical reaction produces CO2 (g). If 44 g is produced at 1.0 atm and 25°C, what volume will the gas occupy? (Assume that CO2 behaves as an ideal gas under these conditions.

What is the smallest carbohydrate called?