How many variables are there in science

2 Calculate What is the density of a liquid with a mass of 17.4g and a volume of 20 mL?

What are the coefficients that will balance this skeleton equation? AlCl3 + NaOH → Al (OH) 3 + NaCl

Which of the following is the correct description of momentum? the product of mass and acceleration the product of mass and velocity velocity divided by mass acceleration divided by mass

Whcih kind if material would best accomplish this task

What two conditions meat be met in order for a collision to be effective

We are all familiar with the general principles of operation of an internal combustion engine: the combustion of fuel drives out the piston.

A first order reaction has a rate constant of 0.816 at 25 oC. Given that the activation energy is 22.7 kJ/mol, calculate the rate constant at 34 oC. (enter answer to 3 decimal places)

Part b select the ester that is formed when propanoic acid reacts with isopropyl alcohol in the presence of heat and an acid catalyst.

Do metals form anions or cations

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon