3 years ago

If you observe with the microscope that a cell contains chloroplasts can you conclude that this is a plant cell?

Chemistry

1 answer:

shusha [124]3 years ago

8 0

Obviously since plant cell contains chloroplasts.

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olganol [36]

The answer is false because a building is heavier

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2 years ago

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On average, Earth’s crust contains about 8.1% aluminum by mass. If a standard 12-ounce soft drink can contains approximately 15

MrMuchimi

Answer:

5400 cans

Explanation:

First we convert the total weight, 1 ton, to grams:

$1ton=1x10^{6}g$

Now we need to know the mass of aluminum:

$m_{Al}=\frac{10^{6}*8.1}{100} =81000g$

Now we make the relation between the mass of aluminum in 1 ton of the earth's crust and the mass of aluminum per can:

$n=\frac{81000g}{15g/can} =5400cans$

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3 years ago

How much heat is required to change temperature of 2g of water from 34°C to 68°C? (Water has a specific heat of 4.18)

statuscvo [17]

Answer: B

Explanation:

To find the amount of heat required, you would use q=mcΔT.

$q=2g(4.18J/g°C)(68-34°C)$

q=284.2 J

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4 0

2 years ago

In a solution with a pH of 4, the [OH-] is: 1x 10-10 1x 10-4 10 - 1x 10-8

e-lub [12.9K]

Answer:

1 x 10^-4

Explanation:

Use the equation pH = -log[OH-}

Rearranging it [OH-] = 10^-pH

Plugging in we get [OH-] = 1 x 10^-4

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3 years ago

Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?

Gnom [1K]

The field of Chemistry.

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2 years ago