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Ad libitum [116K]
3 years ago
13

How many protons does Mg²₊ have?

Chemistry
1 answer:
Varvara68 [4.7K]3 years ago
5 0
Mg has a total of12 protons.
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In the laboratory you dissolve 22.0 g of nickel(II) nitrate in a volumetric flask and add water to a total volume of 125
Ahat [919]

Answer:

<u>1.364 M</u>.

Explanation:

Molarity formula: M= n/v, where n is moles of solute, and v is liters of solution.

Now, we need to convert the grams of nickel to moles and the volume of water to liters.

125mL/1000= 0.125 L.

To convert nickel grams to moles, we need to take a look at it's chemical formula, which is:

Ni(NO_{3} )_{2}

Now we count how many molecules of each element we have:

Ni= 1

N= 2

O= 6

Calculate the weight (g) of each element (the values of g/mol can be found on the periodic table and they may vary slightly between one table and the other):

Ni: (1) (58.6934)= 58.6934

N= (2) (14.007)= 28.014

O= (6) (15.999)= 95.994

Sum all the values to obtain the total weight of 1 mole of this compound:

58.6934+28.014+95.994= 129(g/mole)

Now that we know the that 129 grams equal 1 mole of nickel(II) nitrate, we can convert the 22.0 g to moles:

129g ------- 1 mole

22.0g ----- x

x= (22*1)/129= 0.1705 moles.

Now, we have all the values needed to calculate the molarity of this solution. All we have to do is substitute the values in the formula:

M= (0.1705 moles) / (0.125 L)= <u>1.364 M</u>.

3 0
2 years ago
MATCH
almond37 [142]
I wanna say it would be 1 would be A 2 would be C 3 would be D 4 would be B and 5 would be E



hope this helps
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3 years ago
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I need to have a sentence with the word neap tide in it.
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In the absence of neap tide transect data this hypothesis cannot be tested directly, but three pieces of indirect evidence weigh against it as a complete explanation.
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HELP!! 50 POINTS! PLEASE ANSWER AND EXPLAIN WHY:
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The correct set of measurement is D

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Ions have an extra or lost an electron. Isotopes have different numbers of neutrons.
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