If the atomic number is 3 and the mass number is 7 what is the number of protons

How do you know if a equation is balanced or unbalanced

Calculate the relative atomic mass of this sample of Germanium, giving your answer to two decimal places ...

Which of the following most likely has neither a fixed shape nor a fixed volume? neon gas solid copper liquid nitrogen liquid mercury

If a non-cyclic alkane shows a molecular ion peak at m/z 184, what is the chemical formula?

A reaction mixture initially contains 22.02 g Fe2O3 and 14.66 g CO. Assume that the reaction will progress to 100% completion. What mass (in g) of the excess reactant is leftover?

An analytical chemist is titrating 242.5 mL of a 1.200 M solution of hydrazoic acid HN3 with a 0.3400 M solution of NaOH. The pKa of hydrazoic acid is 4.72. Calculate the pH of the acid solution after the chemist has added 1006.

A gas stream contains 18.0 mol% hexane and the remainder nitrogen. the stream flows to a condenser, where its temperature is reduced and some of the hexane is liquefied. the hexane mole fraction in the gas stream leaving the condenser is 0.0500.

What type of solution is aerated water. why is it so.

What elements form chemical bonds

Which of the following is not a pseudoscientific claim