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3 years ago

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What would happen if there were not enough plants on earth

2 answers:

Sati [7]3 years ago

7 0

Then we would not have oxygen because plants give oxygen in order to breathe

noname [10]3 years ago

4 0

If there was not enough plants on Earth, you would not be able to stay alive because plants give you oxygen, and if there was not enough plants you would not have any oxygen so you would die.

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Arrange these molecules in order of decreasing mass: C6H14 , NO2 , Fe2O3 , and CaCO

babunello [35]

The following is the arrangement of the given molecules in decreasing order of mass: $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

<u>Solution:</u>

First inorder to arrange the elements in descending order of their mass we have to calculate the molecular mass of each element. The calculation is as follows:

<u>Mass of C6H14:</u>

$C\rightarrow6\times12.01 = 72.06$

$H\rightarrow14\times1.008 = 14.112$

<em>Mass of C6H14 is 86.172</em>

<u>Mass of NO2:</u>

$N\rightarrow1\times14.0067 = 14.0067$

$O\rightarrow2\times15.9994 = 31.9988$

<em>Mass of NO2 is 46.0055</em>

<u>Mass of Fe2O3:</u>

$Fe\rightarrow2\times55.845 = 111.69$

$O\rightarrow3\times15.9994 = 47.9982$

<em>Mass of Fe2O3 is 159.6882</em>

<u>Mass of CaCO:</u>

$Ca\rightarrow1\times40.078 = 40.078$

$C\rightarrow1\times12.01 = 12.01$

$O\rightarrow1\times15.9994 = 15.9994$

<em>Mass of CaCO will be 68.0874</em>

So, the order will be $159.6882>86.172>68.0874>46.0055$ which is $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

6 0

3 years ago

There are 34 qeustions on a test John answers 22 of them correctly what is his percent error

Aleks [24]

Answer:

35.29%

Explanation:

% error = |experimental value - Accepted value| / Accepted Value x 100

Number of questions: 34

Number of questions answered: 22

%error = |22-34| / 34 x 100

Hence, John's percentage error is 35.29 % or 35.3%

4 0

3 years ago

What is the percent by mass of aspartame in iced tea that has 0.75 g of aspartame in 250 g of water?

Vesnalui [34]

Answer:0.30%

Explanation:

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3 years ago

Write the scientific notation in numerals. 1.2 x 104

ivanzaharov [21]

1.2*104 is 12000 it is easy just try ur best

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3 years ago

Which of the following is stored in the skeletal system?

tensa zangetsu [6.8K]

Answer:

b calcium

Explanation:

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3 years ago