Describe the ways you can know that a chemical reaction has occurred.

A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be

A ball is thrown straight up in the air. When will its kinetic energy be the least before it is caught?

A sample of octane (c8h18 that has a mass of 0.750 g is burned in a bomb calorimeter. as a result, the temperature of the calorimeter increases from 21.0°c to 41.0°c. the specific heat of the calorimeter is 1.50 j / (g °c, and its mass is 1.00 kg.

5 Which polyatomic ion is found in the compound represented by the formula NaHCO3? (1) acetate (3) hydrogen sulfate (2) hydrogen carbonate (4) oxalate

How do substances differ after a chemical change? The physical properties of the substance stay the same. The physical property of the substance will change. The physical property of the substance will become better.

Given that the pka for the imidazole ring of a histidine has a pKa of 6.5 how many histidine side chains will be charged at a pH of 7.2?

Choose the nonmetallic elements from the list. Check all that apply. A. yttrium B. oxygen C. boron D. polonium E. argon F. gallium G. carbon

How many grams of Tin (SN) would be required to use 6.9 moles of chlorine (cl2)

Identify the values that should be tested to see if a change occurs • x-values • y-values • h-values • z-values

The number of moles of cl - ions needed to combine completely with 0.25 moles of mg+2 ions is: 0.50 0.125 0.75 0.25