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Ierofanga [76]
3 years ago
7

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?

Chemistry
1 answer:
kipiarov [429]3 years ago
5 0
The answer is evaporation<span>.Evaporation is the vaporization of the liquid from its surface into gaseous phase, without boiling the liquid. When all the liquid has passed to gaseous phase the salt dissolved in the salt water will remain as solid crystals.</span><span />
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N2+3H2—&gt; 2NH3 What volume of NH3 at STP is produced if 25.0g of N2 is reacted with an excess of H2 ?
Butoxors [25]

Answer:

The answer to your question is 40 L of NH₃

Explanation:

Data

Volume of NH₃ = x

mass of N₂ = 25 g

mass of H₂ = excess

Balanced chemical reaction

                     N₂  +  3H₂   ⇒  2NH₃

Process

1.- Find the molar mass of N₂ and NH₃

N₂ = 14 x 2 = 28g

2NH₃ = 2[ 14 + 3] = 34 g

2.- Write a proportion to solve this problem

                    28 g of N₂ --------------- 34 g of NH₃

                     25 g of N₂ -------------   x

                     x = (25 x 34)/28

                     x = 30.36 g of NH₃

3.- Calculate the volume of NH₃

                     17 g of NH₃ -------------- 22.4 L

                     30.36 g of NH₃ --------  x

                     x = (30.36 x 22.4) / 17

                     x = 40 L

6 0
3 years ago
Which of the following equalities is not correct?
Kryger [21]

1cm^3 = 1L would be the correct answer. One cubic centimeter equals .001 liter, so this equality above is not correct.

Please let me know if you have any questions! :)

8 0
3 years ago
Read 2 more answers
A gram is one million times larger than a microgram but one billion times smaller than a _______________.
Len [333]
Answer : A hectogram

Explanation:
6 0
3 years ago
ITS MY WORK FROM SCIENCE, AND I NEED THAT FOR NOW, I DONT EVEN KNOW HOW TO ANSWER THAT​
m_a_m_a [10]

Answer:

TEEHEE

Explanation:

5 0
3 years ago
A 3.00 L flexible container holds a sample of hydrogen gas at 153 kPa.
Lisa [10]

The volume of the flexible container that holds a sample of hydrogen gas at 153 kPa is 1.51L (option B).

<h3>How to calculate volume?</h3>

The volume of a substance can be calculated using the following formula:

P1V1 = P2V2

Where;

  • P1 = initial pressure
  • P2 = final pressure
  • V1 = initial volume
  • V2 = final volume

153 × 3 = 304 × V2

459 = 304V2

V2 = 459/304

V2 = 1.51L

Therefore, the volume of the flexible container that holds a sample of hydrogen gas at 153 kPa is 1.51L.

Learn more about volume at: brainly.com/question/2098026

#SPJ1

8 0
2 years ago
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