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3 years ago

Please I would like some help. Will give brainliest for correct answer.

Biology

1 answer:

zheka24 [161]3 years ago

6 0

Answer

Explanation

The conservation of mass principle says that whatever you do to a chemical, the mass of the reactants must equal the mass of the products.

There is a loss somewhere that has not been accounted for.The ribbon and oxygen add up to 6.95 which means that the reactants (oxygen and Magnesium ribbon) added up to more than the mass of the product.

The product was only 6.53 grams. Why that is so is another matter and how they measured the oxygen is still yet something else.

A is wrong. The mass of Mg was measured, it was not calculated.

B is wrong. The experiment really depends on moles not raw mass (which is measured and then converted to mass.)

C is wrong. They are not equal. The products are a little less than the mass of the reactants added together. They do not differ by much, but they do differ.

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9/10+1/4 ?????????..

o-na [289]

9/10+1/4=18/20+5/20=23/20
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3 years ago

Chemical reactions convert to . In nonliving systems, the presence of a(n) allows the reaction to proceed very quickly and have

Dafna11 [192]

<h2>Answer:</h2>

reactants,  products

catalyst

activation energy

enzymes

<h2>Explanation:</h2>

Chemical reactions convert reactants to products. In nonliving systems, the presence of a(n) catalyst allows the reaction to proceed very quickly and have a lower activation energy. In living systems, this function is carried out by proteins called enzymes.

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3 years ago

How did the agreement that no state could stop a fugitive slave form being returned to his or her owner affect slaves?

ELEN [110]

This affected slaves in a negative way because since the fugitive slaves would be returned to their owner, the slaves would later suffer punishment, beatings, and even death due to them escaping their master. It was a terrible agreement that no state could stop a fugitive slave from being returned to his/her owner.

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3 years ago

Which part of the eye changes its shape to enable us to focus first on a distant object and then on a nearby object?

irina [24]

I believe it is the retina that changes shape to focus on distant objects.

7 0

3 years ago

Read 2 more answers

How do I identify controls, independent and dependent variables

frosja888 [35]

Answer:

what you change vs what you are testing

Explanation:

The independent variable is the variable that you change. For example, if we were growing plants and wanted to see if more sun made them grow higher, you would change the amount of sun that each plant is exposed to.

The dependent variable is what you measure. This depends on the independent variable. So, in our plant experiment, the height of the plant is the dependent variable.

Control. The control is what stays the same. So in our plant experiment, the amount of water, type of plant, type of soil, and all of these things would stay the same to insure that the results are equal.

You affect the independent variable and the control and you test the dependent variable.

5 0

4 years ago