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Arte-miy333 [17]
3 years ago
6

True or False

Chemistry
1 answer:
Masja [62]3 years ago
7 0

Answer:

1st:Make an observation

2nd:Ask a question

then you can make a hypothesis

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Unrestricted populations of organisms experience Exponential growth. 

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Gram The Moon was once much doser to E ffect do you think that this distance had What on eclipses?
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You need to prepare 2.00 L of 0.100 M Na2CO3 solution. The best procedure is to weigh out: ___________
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Answer:

The answer to your question is letter C

Explanation:

Data

Volume = 2 L

Molarity = 0.100 M

Molecular weight Na₂CO₃ = (2 x 23) + (1 x 12) + (3 x 16)

                                           = 46 + 12 + 48

                                           = 106 g

Process

1.- Calculate the grams of Na₂CO₃ needed

                         106 g ----------------  1 mol

                           x      ----------------  0.1 moles

                           x = (0.1 x 106) / 1

                           x = 10.6 g

2.- Calculate the grams of Na₂CO₃ needed for 2 liters of solution

                           10.6 g -------------- 1 liter

                            x        --------------  2 liters

                           x = (10.6 x 2) / 1

                           x = 21.2 grams of Na₂CO₃                        

                     

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This creates a buffer solution meaning it will just neutralize out and does not change the PH massively.

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