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laiz [17]
3 years ago
15

In each pair of statements, choose the example that is more reliable.

Chemistry
2 answers:
TEA [102]3 years ago
3 0

Answer:

"statement 2" for the first pair and "statement 1" for the second pair

Explanation:

BlessedZay2 years ago
0 0

In each pair of statements, choose the example that is more reliable.

Statement 1
The company Herbal Remedies Inc. announced today that its antiobesity skin treatment is safe and effective.


Statement 2
The US Food and Drug Administration (FDA) announced today that cancer treatment X, manufactured by Pharma Inc., is safe and effective.


Statement 1
An independent chemical analysis paid for by local residents determined that wells are contaminated with dioxin at a concentration of 3 ppb.


Statement 2
The chemical company Chemicals Inc. insists that local groundwater has not been affected adversely by a leak in its waste handling system.


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i. When an acid reacts with metal, a salt and hydrogen are produced:

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iii. metal and water produce hydrogen gas

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¿Cuál de los siguientes no es un ejemplo de movimiento de masas?
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Which of the following is not an example of a mass movement?

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Answer:

b) acid rain

Explanation:

Acid rain is not an example or a type of mass movement.

Mass movement or mass wasting is the movement of rocks, soils and other debris downslope under the influence of gravity.

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density = mass/volume

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Yes, you're correct.

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When it passes from one medium
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A 50.0 g sample of scandium, sc, is heated by exposure to 1.50 x 10 3 j. The temperature of the sc is raised by 61.1 o
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Given mass of Scandium = 50.0 g

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Heat absorbed by Scandium = 1.50*10^{3}J

The equation showing the relationship between heat, mass, specific heat and temperature change:

Q = m C (deltaT)

Where Q is heat = 1.50*10^{3}J

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On plugging in the values and solving for C(specific heat) we get,

1.50*10^{3}J=50.0g(C)(61.1^{0}C)

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Specific heat of the metal = 0.491\frac{J}{g^{0}C }

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