Vanessa jogged 8 miles in 2 hours. What was her average speed?

2 miles per hour

8 miles per hour

16 miles per hour

4 miles per hour

Define oxidation and reduction in terms of electron transfer

A substance that cannot be broken down into a simpler substance by ordinary chemical or physical means is a what?

If a 2.0g sample of water at 5.0celcius absorbs 21.8Joules of energy, the temprature of the sample will be raised by

Quincy wants to see a real example of rock weathering. Where would be the best place for him to go? A. up on the roof of his house B. to a pond down the street C. downstairs in his basement D. up in the mountains

How does the burning of fossil fuels increase the greenhouse effect?

Gasoline catches on fire is it flammability?

Enzymes are proteins that speed up chemical reactions in the body how do they work A. they increase the surface area of reactants B. they increase the concentration of reactants C. they decrease the concentration of products D. They act as reactants

Atomic number for bromine

A reaction with ΔH = - 13 kJ/mol and ΔS = - 22 J/K·mol, at 2°C, the reaction is: A) spontaneous B) nonspontaneous C) at equilibrium D) impossible to determine reactivity E) none of the above

A sample of an unknown liquid has a volume of 30.0 mL and a mass of 6 g. What is its density? i need this hella quick