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madam [21]
3 years ago
13

Ill give u brainliest plz help

Chemistry
1 answer:
givi [52]3 years ago
6 0
Photosynthesis is when a plant takes in carbon dioxide produced by all breathing organisms and reintroduces oxygen into the atmosphere also creating sugar (glucose), it is so important for humans and animals because it provides the basic energy source for virtually all organisms
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If oil spills continue, all of the following should be expected except (2 points)
Ilia_Sergeevich [38]

Answer:

Polluted ground water.

Explanation:

The rocks through which water flows into the ground sieves most of the contaminants whose molecules are larger than most bacteria. Such molecules include but are not limited oil molecules. Therefore as it descends to the lower levels of the soil profile, water is subjected to continuous filtration by the layers and it is the least susceptible to contamination by oil spills.

4 0
3 years ago
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Which elements have isotopes with the same number of protons and neutrons
yan [13]

Answer:

Atoms of the same element, containing the same number of protons, but different numbers of neutrons, are known as isotopes. Isotopes of any given element all contain the same number of protons, so they have the same atomic number

Explanation:

7 0
4 years ago
Which of the following provides support and protection for many insects
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D

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4 0
3 years ago
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A mixture of A and B is capable of being ignited only if the mole percent of A is 6 %. A mixture containing 9.0 mole% A in B flo
atroni [7]

Explanation:

As it is given that mixture (contains 9 mol % A and 91% B) and it is flowing at a rate of 800 kg/h.

Hence, calculate the molecular weight of the mixture as follows.

             Weight = 0.09 \times 16.04 + 0.91 \times 29

                          = 27.8336 g/mol

And, molar flow rate of air and mixture is calculated as follows.

                    \frac{800}{27.8336}

                     = 28.74 kmol/hr

Now, applying component balance as follows.

                0.09 \times 28.74 + 0 \times F_{B} = 0.06F_{p}

                   F_{p} = 43.11 kmol/hr

                   F_{A} + F_{B} = F_{p}

                          F_{B} = 43.11 - 28.74

                                      = 14.37 kmol/hr

So, mass flow rate of pure (B), is F_{B} = 14.37 \times 29

                                                    = 416.73 kg/hr

According to the product stream, 6 mol% A and 94 mol% B is there.

             Molecular weight of product stream = Mol. weight \times 43.11 kmol/hr

                                  = 0.06 \times 16.04 + 0.94 \times 29

                                  = 28.22 g/mol

Mass of product stream = 1216.67 kg/hr

Hence, mole of O_{2} into the product stream is as follows.

                    0.21 \times 0.94 \times 43.11

                      = 8.5099 kmol/hr \times 329 g/mol

                      = 272.31 kg/hr

Therefore, calculate the mass % of O_{2} into the stream as follows.

                 \frac{272.31}{1216.67} \times 100

                     = 22.38%

Thus, we can conclude that the required flow rate of B is 272.31 kg/hr and the percent by mass of O_{2} in the product gas is 22.38%.

4 0
3 years ago
Identify the processes involved in changes of state between liquids and solids
artcher [175]
Liquid is water or drink and solid is hard
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3 years ago
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