Given: 4na + o2 → 2na2o in this chemical reaction, how many moles of na2o will be produced if 2.90 moles of na react completely? express your answer to three significant figures.

Since we already have the balanced equation, we know that the ratio between is respectively.

So then we can set up a proportion to find the number of moles produced when 2.90 moles of Na react completely:

Then we cross multiply and solve for x:

Therefore, we know that when 2.90 moles of Na react completely, there are 1.45 moles of that are produced.

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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