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lidiya [134]
3 years ago
10

State the Periodic Law. Why is it so important in the study of chemistry?

Chemistry
1 answer:
gayaneshka [121]3 years ago
8 0

Answer:

Summary. To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

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Thermal decomposition of magnesium nitrate and magnesium hydroxide <br><br>​
iragen [17]

Explanation:

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2 years ago
If a girl is dating a guy and the guy is a catfish, what should the girl do to prove it?
dolphi86 [110]

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3 0
3 years ago
Which type of reaction occurs when 50mL quantities of 1 M Ba(OH)2 (aq) and H2SO4 (aq) are combined
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5 0
3 years ago
What is the molarity of a solution containing 8.9 g of NaOH in 550. mL of NaOH solution?
bulgar [2K]

Answer:

0.4 M

Explanation:

Molarity is defined as moles of solute, which in your case is sodium hydroxide,  

NaOH

, divided by liters of solution.

molarity

=

moles of solute

liters of solution

Notice that the problem provides you with the volume of the solution, but that the volume is expressed in milliliters,  

mL

.

Moreover, you don't have the number of moles of sodium hydroxide, you just have the mass in grams. So, your strategy here will be to

determine how many moles of sodium hydroxide you have in that many grams

convert the volume of the solution from milliliters to liters

So, to get the number of moles of solute, use sodium hydroxide's molar mass, which tells you what the mass of one mole of sodium hydroxide is.

7

g

⋅

1 mole NaOH

40.0

g

=

0.175 moles NaOH

The volume of the solution in liters will be

500

mL

⋅

1 L

1000

mL

=

0.5 L

Therefore, the molarity of the solution will be

c

=

n

V

c

=

0.175 moles

0.5 L

=

0.35 M

Rounded to one sig fig, the answer will be

c

=

0.4 M

Explanation:

6 0
2 years ago
If two objects have the same mass, what must be true? choose the correct answer A. They have the same volume B. They are made of
Nataly_w [17]
C. Mass is kind of like a measurement of matter.
7 0
3 years ago
Read 2 more answers
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