John pushes his brother Danny on a skateboard. John applies a force of 39 N

and Danny's acceleration is 0.9 m/s2. What is the combined mass of Danny

and his skateboard?

A. 43 kg

B. 48 kg

C. 31 kg

D. 35 kg

Which property ofsulphuric acid makes it suitable to use as a catalyst for the preparation of esters?

When one reactant turns into several products, what is the reaction called

Ta Os Rh create what metal non metal metalloid or gas

Not including hydrogen or helium which element would you expect to bond covalently with an oxygen atom to form a two-atom molecule?

What are some arguments for and against the use of alternative energy sources rather than fossil fuels?

Select the single best answer. which of these factors influence buffer capacity? conjugate acid-base pair concentration of buffer components buffer range ph of the buffer pka of the acid component

Oxygen (O) will have chemical properties most like: sulfur (S). nitrogen (N). hydrogen (H). fluorine (F).

List the five major pollutants in the United States

What mass of MgCl2 was produced from 5.87 of Mg (OH) 2 reacting with 12.84 g of HCl? Identify the limiting and the excess reactants.

Use a Punnett square to predict the cross of a homozygous tall parent with a homozygous short parent, if tall is dominant over short. What will be the phenotype of the offspring described in this example. Select one: a. some tall some short b.