Matter is niether created nor destroyed in any chemical change. Is this a theory or a law?

What is the answer to it

How has the fishing industry along the Chesapeake Bay changed in the last 25 years?

1. Which of these show a diatomic element? CO H₂ He SO₂ 2. Which of these substances is an element? Chlorine Ice Methane Sodium chloride 3. When the elements lead and bromine combine together, the name of the substance formed is called ...

How many independent variables should be in your experimment A. 3 or more B. 0 C. 2 D. 1

Determine the number of significant figures in each of the following measurements A). 11 soccer player B). 0.070020 meter C). 10,800 meters D). 0.010 square meter E). 5.00 cubic meters F). 507 thumbtacks

A 126-gram sample of titanium metal is heated from 20.0°C to 45.4°C while absorbing 1.68 kJ of heat. What is the specific heat of titanium?

What pressure (in atm) will a sample of o2 gas occupy at 100.0 ml, if o2 has a volume of 25.00 ml at 2.0 atm?

What happens when francium and nitrogen are mixed

Which type of chemical reaction occurs in 2KClO3 Right arrow. 2KCl + 3O2

An electrochemical cell is constructed using two half-cells: Al (s) in Al (NO2) 3 (aq) and Cu (s) in Cu (NO3) 2 (aq). The two half cells are connected by a KNO3 salt bridge and two copper wires from the electrodes to a voltmeter.