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svp [43]
2 years ago
15

Making homemade ice cream is one of life's great pleasures. fresh milk and cream, sugar, and flavorings are churned in a bucket

suspended in an ice–water mixture, the freezing point of which has been lowered by adding rock salt. one manufacturer of home ice cream freezers recommends adding 2.50 lb (1130 g) of rock salt (nacl) to 16.0 lb of ice (7250 g) in a 4-qt freezer. calculate the weight percent of nacl of the solution that will result when this mixture melts.
Chemistry
2 answers:
vampirchik [111]2 years ago
6 0

We know that weight percent can be calculated as

weightpercent=\frac{weight-of-substanceX100}{totalweight}

total weight = weight of NaCl + weight of water

weight of NaCl = 1130 g

weight of water = 7250 g

total weight = 1130 + 7250 = 8380g

Therefore

weight % of NaCl = \frac{1130X100}{1130+7250}=13.48%

Thus weight % = 13.48 %

crimeas [40]2 years ago
4 0
It should be 13.48%.

 1130g NaCL/7250g Ice + 1130 NaCl=0.1348 x 100%= 13.48%
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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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3 years ago
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  • <em><u>it's </u></em><em><u> </u></em><em><u>6</u></em><em><u>!</u></em><em><u>!</u></em>

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2 years ago
An exponent of "2" means that if we double the concentration of the reactant the rate doubles as well Exponents in rate laws are
Karo-lina-s [1.5K]

Answer:

- False.

- False.

- True.

- True.

Explanation:

Hello, for each statement we state:

- An exponent of "2" means that if we double the concentration of the reactant the rate doubles as well.

FALSE because considering a rate law like:

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The exponent of "2" powers the concentration to the second power, not doubles the rate law, thus, if C is 3, for k=1, r will be -9. On the other hand if the rate is like:

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FALSE because for nonelemental chemical reactions, the exponents do not match with each species' stoichiometric coefficients in the rate law.

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TRUE, since the Arrhenius equation allows us to prove the effect of the activation energy and the temperature:

k=Aexp(-\frac{Ea}{RT})

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TRUE as they are given like:

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