Select the correct answer.

Which particles make up the nucleus of an atom?

A.

protons and electrons

B.

neutrons and electrons

C.

protons only

D.

protons and neutrons

E.

neutrons only

4. What formed as a result of a hot spot? a) The San Andreas fault b) Mount St. Helens c) The Mid Atlantic Ridge

What is density a measure of.

A chemical reaction in which two or more elements switch places is called?

You are given a solution of sugar and sand and water your task is to separate sugar from sand which of the following experimental designs would you choose

A sample of trifluoroacetic acid, C2HF3O2, contains 38.9 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

Which of the following statements about water is true? It's strongest intermolecular forces are London dispersion forces It's a non-polar molecule It's a solid at room temperature and pressure It's a solid form is less dense than the liquid form

At 25.0 degrees Celsius, one milliliter of mercury has a mass of 13.6g. How many liters of mercury are required to have a mass of 500 Kg of mercury?

Propane (C3 H8 (g), Hf = - 103.8 kJ/mol) reacts with oxygen to produce carbon dioxide (CO2, Hf = - 393.5 kJ/mol) and water (H2 O, Hf = - 241.82 kJ/mol) according to the equation below. What is the enthalpy of combustion (per mole) of C3 H8 (g) ? Use.

How many gold atoms would have to be lined up to span 6.5mm

Determine how many grams of co2 are produced by burning 4.37 g of c4h10.