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3 years ago

Hi, I need these 3 answers to these question

Chemistry

2 answers:

babunello [35]3 years ago

7 0

1.C I'm making a guess

ZanzabumX [31]3 years ago

5 0

The third answers are food production medical research and scientific research <span />

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Write the overall, balanced molecular equation and indicate which element is oxidized and which is reduced for the following rea

REY [17]

Explanation:

Mg(s) + Cr(C2H3O2)3 (aq)

Overall, balanced molecular equation

Mg(s) + Cr(C2H3O2)3(aq) --> Mg(C2H3O2)3(aq) + Cr(s)

To identify if an element has been reduced or oxidized, the oxidation number is observed in both the reactant and product phase.

An increase in oxidation number denotes that the element has been oxidized.

A decrease in oxidation number denotes that the element has been reduced.

Oxidation number of Mg:

Reactant - 0

Product - +3

Oxidation number of Cr:

Reactant - +3

Product - 0

Note: C2H3O2 is actually acetate ion; CH3COO- The oxidatioon number of C, H and O do not change.

Oxidized : Mg

Reduced : Cr

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3 years ago

What is one way to increase the solubility of sugar in water? a. Heat the water. b. Chill the water. c. Increase the amount of s

geniusboy [140]

C.............................

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4 years ago

The measure of how heat can travel through a substance is Called

Doss [256]

Answer:

Tempature is the measurment of how heat travels through a substance

Explanation:

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3 years ago

Carbon dioxide, when it is at -145 degreesC has a density of 2.54 g/L. What is the pressure in torr??

Black_prince [1.1K]

Answer: The pressure in torr is 461 torr

Explanation:

To calculate the relation of density and molar mass of a compound, we use the ideal gas equation:

PV=nRT

P = pressure

V = Volume

n = number of moles

R = gas constant = 0.0821 Latm/Kmol

T = temperature = $-145^0C=(273-145)K=128K$

Number of moles (n) can be written as:

$n=\frac{m}{M}$

where, m = given mass

M = molar mass = 44 g/mol

$PV=\frac{m}{M}RT\\\\PM=\frac{m}{V}RT$

where,

$\frac{m}{V}=d$

where d = density = 2.54 g/L

The relation becomes:

PM=dRT

$P=\frac{dRT}{M}$

$P=\frac{2.54\times 0.0821\times 128}{44}=0.607atm$

$P=461torr$ (760torr=1atm)

Thus the pressure in torr is 461 torr

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3 years ago

200 grams of an organic sample which contains only carbon, hydrogen, and oxygen is analyzed and found to contain 97.30 grams of

ipn [44]

The empirical formula for 200 grams of an organic sample which contains carbon,hydrogen, and oxygen is C3H6O

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3 years ago

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