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tankabanditka [31]
3 years ago
13

Dorothy left a frozen juice pop out on the counter. When she returned, the juice pop had melted into a liquid. Which of the foll

owing is true of the molecules in the juice pop?
Group of answer choices

The molecules had more kinetic energy when the juice pop was frozen.

The molecules were closer together when the juice pop was frozen.

The molecules became more tightly packed when the juice pop melted.

The molecules moved less freely when the juice pop melted.
Chemistry
1 answer:
Brums [2.3K]3 years ago
8 0

Answer:

B) The molecules were closer together when the juice pop was frozen.

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D. Use x-ray radiation to see if there are any fractured bones.

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3 years ago
An organic compound (A) reacts with HCN to give (B). On hydrolysis of (B) in acidic medium gives (C). Compound (A) also produces
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3 years ago
Arrange the following aqueous solutions in order of decreasing freezing point: 0.10 m Na3PO4, 0.35 m NaCl, 0.20 m MgCl2, 0.15 m
GarryVolchara [31]

Answer: 0.35 m NaCl > 0.20 m MgCl_2 >0.10 m Na3PO_4 > 0.15 m CH_3COOH > 0.15 m C_6H_{12}O_6

Explanation:

Depression in freezing point:

T_f^0-T_f=i\times k_b\times m

where,

T_f= freezing point of solution

T^o_f = freezing point of solvent

k_f = freezing point constant

m = molality

1. For 0.10 m Na3PO_4

Na_3PO_4\rightarrow 3Na^++PO_4^{3-}

, i= 4 as it is a electrolyte and dissociate to give 4 ions. and concentration of ions will be 4\times 0.10=0.40

2. For 0.35 m NaCl

NaCl\rightarrow Na^++Cl^-

, i= 2 as it is a electrolyte and dissociate to give 2 ions. and concentration of ions will be 2\times 0.35=0.70 

3. For 0.20 m MgCl_2

MgCl_2\rightarrow Mg^{2+}+2Cl^-

, i= 3 as it is a electrolyte and dissociate to give 3 ions. and concentration of ions will be 3\times 0.20=0.60 

4. For 0.15 m C_6H_{12}O_6

, i= 1 as it is a non electrolyte and does not dissociate to give ions.

5. For 0.15 m CH_3COOH

CH_3COOH\rightarrow CH_3COO^-+H^+

, i= 2 as it is a electrolyte and dissociate to give 2 ions and thus have 2\times 0.15=0.30 

As concentration is highest for 0.35 m NaCl , freezing point depression will be highest and thus has lowest freezing point. As concentration is lowest for 0.15 m C_6H_{12}O_6 , freezing point depression will be lowest and thus has highest freezing point

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3 years ago
Balance the following equation and determine the coefficients in order
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Answer:

D 4,3,2

Explanation:

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