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frozen [14]
3 years ago
11

1. You have three molecules of glucose (3C6H12O6). How many carbon atoms do you have?. . A. 3. . B. 6. . C. 18. . D. 36. 2. Whic

h of the following is a homogenous mixture of two or more pure substances? . A. oxygen. B. water. C. air. D. alcohol.
Chemistry
2 answers:
Juliette [100K]3 years ago
6 0

Answer:

1. C. 18 atoms of carbon

2. C. Air

Explanation:

1. The formula of one molecule of glucose is

C_{6}H_{12}O_{6}

In this formula we have:

Carbon: 6 atoms

Hydrogen: 12 atoms

Oxygen: 6 atoms

if we have three glucose molecules, we have to multiply the formula (C_{6}H_{12}O_{6}) by three

3(C_{6}H_{12}O_{6})\\C_{18}H_{36}O_{18}

In this formula we have:

Carbon: 18 atoms

Hydrogen: 36 atoms

Oxygen: 18 atoms

2. A homogeneous mixture is the combination of 2 or more unidentifiable elements or substances within the solution.

Homogeneous mixtures are characterized by being uniform, this means that the elements that compose it are not distinguishable.

A. Oxygen is molecule O_{2}

B. Water is molecule compose by 2 elements H_{2}O

C. Air is a mixture of several gases.

D. Alcohol is compound of carbon, hydrogen and oxygen.C_{2}H{5}OH

Leviafan [203]3 years ago
3 0
One molecule of glucose has 6 carbon atoms. So if you have three molecules of glucose, simply multiply 3 by 6 carbon atoms. The correct answer is C. 18 Carbon atoms. 

The correct answer for the second questions is C. Air. A homogenous mixture is a mixture in which its components are uniformly distributed throughout the mixture. It has a sigle phase.
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Margarita [4]

Answer:

This question is incomplete; the complete part is:

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Explanation:

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6 0
3 years ago
Write the chemical formula for disilicon hexabromide.
Rasek [7]

Answer:

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Explanation:

5 0
3 years ago
4.45 kcal of heat was added to increase the temperature of a sample of water from 23.0 °C to 57.8 °C. Calculate
Alona [7]

Answer:

m = 4450 g

Explanation:

Given data:

Amount of heat added = 4.45 Kcal ( 4.45 kcal ×1000 cal/ 1kcal = 4450 cal)

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Specific heat capacity of water = 1 cal/g.°C

Mass of water in gram = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

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ΔT = 34.8°C

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Explanation:

When a solid substance is dissolved in a liquid such as water, the intermolecular forces of attraction between the molecules in the solid substance are overcome and they exist as ions in the solution. Hence the answer is 2.

6 0
3 years ago
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Gwar [14]

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