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2 years ago

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation

2 answers:

7 0

<span>When an ice cube is placed on a kitchen counter, heat will flow from the ice cube to the counter, causing the molecules in the counter to move more slowly. The molecules of the counter move more slowly because the heat transferred to them from the ice has reduced their kinetic energy.</span>

kozerog [31]2 years ago

5 0

Answer:

Heat flows from the counter to the ice causing the molecules in the counter to move more slowly

Explanation:

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Use the formula M1V1=M2V2. 5(3)=1x

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Answer:

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Explanation:

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2 years ago

Two mixtures were prepared from three very narrow molar mass distribution polystyrene samples with molar masses of 10,000, 30,00

AnnZ [28]

Answer:

Hello some parts of your question is missing

Two mixtures were prepared from three very narrow molar mass distribution polystyrene samples with molar masses of 10,000, 30,000 and 100,000 g mol−1 as indicated below: (a) Equal numbers of molecules of each sample (b) Equal masses of each sample (c) By mixing in the mass ratio 0.145:0.855 the two samples with molar masses of 10,000 and 100,000 g mol−1 For each of the mixtures, calculate the number-average and weight-average molar masses and comment upon the meaning of the values.

Answers:

a) 46.666.66 g/mol

b) 20930.23 g/mol

c)43333.33 g/mol

Explanation:

A)The equal number of molecules of each sample can be calculated using $Mn = \frac{n(M1 + M2 + M3)}{3n}$

because for the number of molecules to be equal : n1 = n2 = n3 = n

Mn = 46666.66 g/mol

B ) To calculate the equal masses of each sample

we apply this equation

$Mn = \frac{W1 + W2 +W3}{\frac{W1}{M1} +\frac{W2}{M2}+ \frac{W3}{M3} }$

ATTACHED BELOW IS THE REMAINING PART OF THE SOLUTION

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2 years ago

18) Why are the large oak trees so important for storks? Where are<br> they found?<br> 1

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Explanation: There important because Storks only live in these types of trees

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2 years ago