A train covers 168 km in 4 hours. Find its speed.

Which statement describes acids

How does the negative control of the lac operon by glucose function through inducer exclusion? See Section 18.3 (Page 373).

What's needed to build a neutral atom?

The calvin cycle: A). Was named after an american biochemist B). does not require light energy to work C). produces glucose and water D). All of the above

Breads and other whole grain foods are composed of very large polysaccharide molecules which contain hydrogen, oxygen, and which other element? A) carbonB) ironC) nitrogenD) water

The heat of combustion of propane, C3H8, is 2220 kJ/mol. The specific heat of copper is 0.385 J/g°C. How many grams of propane must be burned to raise the temperature of a 10.0 kg block of copper from 25.0°C to 65.

Which is an example of Temporal Isolation? A. Flowers that bloom in different months. B. Birds that have different mating calls C. Fruits flies that mate in different locations. D. Squirrels that have different fur colors

A chemical reaction can start when enough activation energy is added to the reactants. Do you think the activation energy for chemical reactions in living things is high or low / Explain your answer

20 Which statement describes a reversible reaction at equilibrium? (1) The activation energy of the forward reaction must equal the activation energy of the reverse reaction.

Count the total number of atoms in CaCO3: 2 3 4 5 6