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enot [183]
2 years ago
9

Which statement describes an important role of carbon dioxide in Earth’s atmosphere? *

Chemistry
2 answers:
Leokris [45]2 years ago
8 0

Answer:

Plants use carbon dioxide to make food.

Explanation:

maw [93]2 years ago
7 0

Answer:B

Explanation: i did it

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Consider these elements: p, ca, si, s, ga.<br> a. write the electron configuration for each element
dimulka [17.4K]
Method:

1) Find the atomic number in a periodic table: the number of electrons equal the atomic number

2) Use Aufbau rule

Element     atomic number       electron configuration
<span>
P                15                            1s2 2s2 2p6 3s2 3p3

Ca              20                            </span><span><span>1s2 2s2 2p6 3s2 3p6 4s2

</span>Si                14</span><span>                            1s2 2s2 2p6 3s2 3p2

S                 16</span><span><span>                            1s2 2s2 2p6 3s2 3p4

</span>Ga               31.                   </span><span><span>        1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p</span>       </span>
7 0
3 years ago
When do acids follow the same naming conventions as other covalent componds
Valentin [98]
Jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjgccccccccccccccccccccc
3 0
3 years ago
You have 15.42g of C2H6. How many moles of H2O can be made?
Amiraneli [1.4K]

<u>Answer:</u> The moles of water produced are 1.54 moles.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass of ethane = 15.42 g

Molar mass of ethane = 30.07 g/mol

Putting values in above equation, we get:

\text{Moles of ethane}=\frac{15.42g}{30.07g/mol}=0.513mol

The chemical equation for the combustion of ethane follows:

2C_2H_6+5O_2\rightarrow 4CO2+6H_2O

By Stoichiometry of the reaction:

2 moles of ethane produces 6 moles of water

So, 0.513 moles of ethane will produce = \frac{6}{2}\times 0.513=1.54mol of water

Hence, the moles of water produced are 1.54 moles.

4 0
3 years ago
Pls Help! one multiple-choice question for 13 points and brainliest!
goblinko [34]

Answer:

B

Explanation:

They use energy from sunlight to synthesise glucose from carbon dioxide and water.  

6 0
2 years ago
What is the mass of a steel cylinder that has a density of 75.0 g/mL and a volume of 12 mL?
siniylev [52]
<span>
hey there!:

density = 75.0 g/mL

Volume = 12 mL

mass = ?

Therefore:

D = m / V

75.0 =m / 12

m = 75.0 * 12

m = 900 g

Answer B

</span>
5 0
3 years ago
Read 2 more answers
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