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3 years ago

Which formulas represent one iconic compound and one molecular compound

1 answer:

6 0

An ionic compound is any compound containing a metal and a nonmetal

For example: NaCl, MgO, etc

Sometimes they’ll include polyatomic ions, such as CN (cyanide), ClO3 (chlorate), and many others

For example: NaCN, LiClO3, etc

A covalent or molecular compound usually contains shared pairs of electrons

Some examples are H2O, CO2, CHCl3

Notice, that these are all composed of non-metals.

Hope this helps. It’s hard to answer specifically when I can’t see the options.

If this helps, give me a brainliest, so I know I was helpful.

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3 years ago

I need part 1 and 2 please , just separate answers

Vladimir79 [104]

First, we have to remember the molarity formula:

$M=\text{ }\frac{moles\text{ of solute}}{L\text{ solution}}$

Part 1:

In this case, our solute is sodium nitrate (NaNO3), and we have the mass dissolved in water, then we have to convert grams to moles. For that, we need the molecular weight:

$M.W_{NaNO_3}=\text{ 23+14+16*3= 85 g/mol}$

Then, we calculate the moles present in the solution:

$3.976\text{ g NaNO}_3\text{ * }\frac{1\text{ mol}}{85\text{ g}}=\text{ 0.04678 mol NaNO}_3$

Now, we have the necessary data to calculate the molarity (with the solution volume of 200 mL):

$M=\frac{0.04678\text{ mol}}{200\text{ mL*}\frac{1\text{ L}}{1000\text{ mL}}}=\text{ 0.2339 M}$

The molarity of this solution equals 0.2339 M.

Part 2:

In this case, we have the same amount (in moles and mass) of sodium nitrate, but a different volume of solution, then we only have to change it:

$M=\text{ }\frac{0.04678\text{ mol}}{275\text{ mL *}\frac{1\text{ L}}{1000\text{ mL}}}=\text{ 0.1701 M}$

So, the molarity of this solution is 0.1701 M.

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1 year ago