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Elis [28]
3 years ago
10

CAN SOMEONE PLS HELP ITS A VERY IMPORTANT GRADE PLS HELP ASAP

Chemistry
1 answer:
hjlf3 years ago
3 0
I believe the answer is respiratory bc of how blood exchange works in the body w the circulatory system. None of the other answers make sense either
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A chemist found that 4.69 g of sulfur combined with fluorine to produce 15.81 g of a gas. what is the empirical formula of the g
timofeeve [1]
Mass of sulfur combined - 4.69 g
Mass of gas produced is 15.81 g, therefore mass of fluorine is (15.81-4.69) = 11.12 g
Number of sulfur moles - 4.69 g/32 g/mol = 0.15 mol
Number of fluorine moles - 11.12 g/ 19 g/mol = 0.585 mol
divide both by least number of moles 
S - 0.15/0.15 = 1
F - 0.585/0.15 = 3.9 rounded off is 4
ratio of S to F = 1:4Therefore formula of the gas is SF₄
7 0
3 years ago
Read 2 more answers
What is the main function of the part labeled Yin the model?
NARA [144]

Answer:

The part labelled Y is the chloroplast and its main function is to produce food for the plant in the reactions of photosynthesis.

Explanation:

Plants are autotrophic organisms in that they are able to manufacture their own food. Plants are able to manufacture their own food due to the presence of the cell organelle known as the chloroplast.  The plant chloroplast has its own DNA and can reproduce independently, from the rest of the cell. They can as well produce amino acids and lipids required for the chloroplast membrane.

Chloroplasts are green-colored membrane-bound organelles found within the plant cell. Their green color is due to the presence of the pigment, chlorophyll. Chlorophyll in the chloroplasts are responsible for absorbing light energy from sunlight and using this absorbed energy to make simple sugars (carbohydrates) from carbon (iv) oxide and water. This is the main function of the chloroplasts in plant cells.

Photosynthesis occurs in the chloroplasts in two reaction steps:

1. The light reaction - involves the splitting of e=water molecules using the energy of sunlight

2. The dark reactions - carbon (iv) oxide from the air is used to produce sugars.

8 0
2 years ago
What kind of plant growth hormone to regular plant growth. We dissolve 5.0 mg of the solution into 2.0 kg of water. What is the
In-s [12.5K]

Answer:

The dosage of the solution is 2.5 parts per million.

Explanation:

The solvent proportion in parts per million is equal to the ratio of solution in miligrams to ratio of water in miligrams multiplied by a million. (A kilogram is equivalent to a million miligrams) That is:

p.p.m. = \frac{5\,mg}{2000000\,mg}\times 1000000

p.p.m. = 2.5\, ppm

The dosage of the solution is 2.5 parts per million.

3 0
3 years ago
Easy Chemistry/ Help
Sauron [17]
I’m not really sure what the qn is asking for but if i’m not wrong it should be ‘1’ for each blank!
4 0
3 years ago
Which of the following elements would you expect to be ductile and
aksik [14]

Answer:

ductile - germanium

mellabe - zirconium

8 0
3 years ago
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