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Roman55 [17]
3 years ago
10

What is a pure substance

Chemistry
1 answer:
Semmy [17]3 years ago
6 0
A pure substance is a element made up of only one type of atom or molecule.
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HELP ASAP
borishaifa [10]

Answer:

O2

Explanation:

At standard temperature and pressure, oxygen is found as a gas consisting of two oxygen atoms, chemical formula O2.

7 0
3 years ago
Silver and gold are both considered coinage metals. How does a mole of 10 points
Reil [10]

Answer:

They both have the same number of atoms

Explanation:

quizlet

3 0
3 years ago
Water is a polar molecule, meaning it carries partial charges (δ or δ–) on opposite sides of the molecule. for two formula u
Zielflug [23.3K]
The side of each water molecule with the oxygen atom uncovered will be marginally negative. 
The side of each water molecule with the hydrogen atoms uncovered will be marginally positive. 
So the two Cl{-} particles will be pulled in to the biggest number of positive charges, which happen in the boxes on the upper right and lower left. 
The two Na{+} particles will be pulled in to the biggest number of negative charges, which happen in the boxes on the upper left and lower right.
3 0
3 years ago
Read 2 more answers
First to answer correctly gets brainleist
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When it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere. It could be A I’m not sure if this helps.
6 0
3 years ago
What is the osmolarity of .00001 grams (0.1 mg%) of ethanol (does not dissociate) in one liter?
MrMuchimi

Explanation:

As it is known that non-electrolytes do not dissociate. Therefore, molarity of such a solution is equal to the osmolarity of solution.

As, molar mass of ethanol = 46.07 g/mol

Therefore, no. of moles of ethanol will be calculated as follows.

               No. of moles = \frac{mass}{\text{molar mass}}

                                     = \frac{0.00001 g}{46.07 g/mol}

                                     = 2.17 \times 10^{-7} mol

As, molarity is moles of solute in liter of solution. Hence, molarity of ethanol is as follows.

                           Molarity = \frac{\text{no. of moles}}{volume}

                                          = \frac{2.17 \times 10^{-7} mol}{1 L}

                                          = 2.17 \times 10^{-7} mol/L

Since, for the given solution Molarity = osmolarity

Thus, we can conclude that osmolarity of .00001 grams (0.1 mg%) of ethanol  in 1 L is 2.17 \times 10^{-7} osmol/L.

8 0
3 years ago
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