Substance that undergoes a change in a chemical reaction is

a. a product

c. a reactant.

b. a chemical.

d. an enzyme.

Explain how resistance affects current in a circuit.

Technician A says that the exhaust valve is larger than the intake valve to ensure that all the exhaust gases leave the cylinder. Technician B says that the exhaust valve is larger than the intake valve to ensure proper heat dissipation.

Why do atoms bond?

A given substance is, meaning that is can easily pass through fatty substances and mix with them freely. However, this substance does not mix well with molecules that are polar. Only substances mix well with polar molecules.

Where is arrick?

If the molar mass of NaCl is 58.44 g/mol, what amount of NaCl (in mol) is contained in 250.0 mg of NaCl?

Which has more surface area, a rock the size of your hand or a handful of small rocks?

4Al (s) + 3O2 (g) - >2Al2O3 (s) the reaction is started by mixing 10.0g of Al and 10.0g of O2. What is the limiting reaction and how much Al2O3 is produced?

F 3.84 moles of methane are consumed in this reaction, how many moles of HCN will be produced?

Two metals with equal mass and different heat capacities are subject to the same amount of heat; which undergoes the smallest change? a) The metal with the higher heat capacity. b) The metal with the lower heat capacity.