What particles in an,atom determine an elements atomic number and identity?

2 answers:

5 0

"Number of Protons" determines it's Atomic Number & Identity 'cause

Number of Protons = Atomic Number

Hope this helps!

ale4655 [162]3 years ago

4 0

Protons determine the atomic number and identity.

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What is the molarity of a solution in which 250 grams of NaCl are dissolved in 2.9 L of water?

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About 1.48 M.

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The formula for molarity is mol/L.

So firstly, you must find the amount of moles in 250 grams of NaCl.

I do this by using stoichiometry. First, I find how nany grams are in a single mole of NaCl. This is around 58.44 grams/mole. Now that I know this, I can now use a stoich table. (250 g NaCl * 1 mol NaCl / 58.44 g NaCl). I plug this into my calculator.

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I've attached a picture of my personal notes below which shows work I have done in similar equations.

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