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Elden [556K]
3 years ago
15

Select the correct answer. Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears. Samuel takes

a sip to discover that the water tastes salty. What kind of change has occurred? OA It's a chemical reaction because a new substance has formed. O B. It's a physical change because the water and the salt kept their original properties. O C. It's an example of synthesis because two substances reacted to give one substance. O D. It's a chemical reaction because the water now tastes salty but originally did not.
HELLLPPPP PLEASEEEEE!!!!!
​
Chemistry
2 answers:
harkovskaia [24]3 years ago
6 0
: B is your answer
:
Neko [114]3 years ago
4 0

Answer:

B. It's a physical change because the water and the salt kept their original properties.

Explanation:

Even though it tastes like salty water, the salt is still present, just in smaller molecules. It can be brought back so it is a physical change.

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Answer:

2.15 atm

Explanation:

P1=P2V2T1/V1T2

7 0
3 years ago
What is the theoretical yield of Li3N in grams when 12.7 g of Li is heated with 34.7 g of N2
Nata [24]
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34.7 g N2(1 mole N2/28 g N2)=1.23
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3 0
3 years ago
(b) Which of the following is a mixture?
bija089 [108]

Answer:

a

Explanation:

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4 0
3 years ago
A potassium bromide solution is 8.34% potassium bromide by mass and its density is 1.03 g/ml. what mass of potassium bromide is
jenyasd209 [6]

Answer:-  3.84 grams

Solution:-  Volume of the sample is 44.8 mL and the density is 1.03 gram per mL.

From the density and volume we calculate the mass as:

mass = volume*density

44.8mL(\frac{1.03g}{mL})

= 46.1 g

From given info, potassium bromide solution is 8.34% potassium bromide by mass. It means if we have 100 grams of the solution then 8.34 grams of potassium bromide is present in. We need to calculate how many grams of potassium bromide are present in 46.1 grams of the solution.

The calculations could easily be done using dimensional analysis as:

46.1gSolution(\frac{8.34gKBr}{100gSolution})

= 3.84 g KBr

Hence, 3.84 grams of KBr are present in 44.8 mL of the solution.

8 0
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The image represents the reaction between a certain number of molecules of N2 and H2
sertanlavr [38]
2 molecules of N2, because the hydrogen is the limiting reactant, leaving there to be more N (4 molecules) so those 4 molecules create 2 N2 molecules.
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