All categories

3 years ago

Please help with this I do not under stand

Chemistry

1 answer:

svetoff [14.1K]3 years ago

3 0

Answer:

See below:

Explanation:

The grasshopper doesn't require an exchange of gasses (air) using a circulatory system because the gasses directly reach its cell's from the "air sacs" which spread out into tiny tubes close to each cell.

You might be interested in

. Name at least 3 intertidal organisms.

Alex Ar [27]

I think 3 intertidal organisms would be
Crabs, starfish, and tube worms.
I hope that helped

7 0

3 years ago

Read 2 more answers

Perform the following

Ghella [55]

Answer:

1.85 × 10⁻⁶

Explanation:

0.0003 ÷ 162 = 1.851851852 × 10⁻⁶ ⇒ 1.85 × 10⁻⁶

Hope that helps.

4 0

3 years ago

What is the mole ratio of calcium carbonate to carbon dioxide in the reaction between hydrochloric acid and calcium carbonate? 2

tigry1 [53]

Answer:

B. 1:1.

Explanation:

Hello!

In this case, given the following chemical reaction:

$2HCl+CaCO_3 \rightarrow CaCl_2 +CO_2 +H_2O$

We can see that the coefficient in calcium carbonate is 1 and that of carbon dioxide is also 1, therefore the mole ratio between them is B. 1:1.

Best regards

4 0

3 years ago

A person who exercises vigorously several hours a day might take in about 22 m3 of air per day. A tree about 33 m tall and 0.55

Maurinko [17]

Answer:

<u><em>95 people can breath with five such trees supplying oxygen.</em></u>

Explanation:

Given data:

a man take in oxygen in a day : 22 $m^{3}$ (1 $m^{3}$ = 1000L)

Tree length: 33 m

Tree diameter : 0.55 m

tree produce oxygen in a year : 84,000 L

Tree oxygen in the air : 20%

1 $m^{3}$ = 1000 L

To find:

number of people can breath with 5 such trees: ?

Calculation:

Calculate the oxygen produced by 5 trees:

= 5 x 84,000

= 420.000 L

= 420 $m^{3}$

Calculate the air

= 420 x 100% / 20%

= 2100 m^3

Calculate the number of people:

= 2100 m^3 / 22 m^3

= 95.5

= 95 people

4 0

4 years ago

The tiny particle of an atom moves around the nucleus is the

Dahasolnce [82]

Answer:

Explanation:

1.) Plasma is not found in electrons

2.) Protons are found in the nucleus

3.) Neutrons are found in the Nucleus

4.) Electrons orbit the nucleus in the electron cloud

6 0

3 years ago