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2 years ago

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What does the cell theory state? Answer F All organisms are composed of a nucleus G All prokaryotes are composed of multiple cel

ls H All prokaryotes are single celled organisms J All organisms are composed of cells

1 answer:

Sav [38]2 years ago

3 0

Answer:

(J) All organisms are composed of cells

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How many atoms of hydrogen (h) are present in 200 molecules of ammonia (nh3)? express your answer numerically?

natita [175]

<span>Chemical formula of ammonia = NH3 As we can see there are three atoms of hydrogen in one molecule of ammonia. So in the 200 molecule of ammonia there will be = 200*3 = 600 atoms of hydrogen. Answer - 600 atoms of hydrogen.</span>

6 0

3 years ago

Free point any who really needs them here you go

musickatia [10]

Answer:

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Explanation:

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3 years ago

Read 2 more answers

Please help fast :/

mash [69]

Answer: C- 1.65 moles

Explanation:

HCl = 1 + 35.45 = 36.45 g/mol

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3 years ago

A simplified version of photosynthesis can be represented as carbon dioxide

Rina8888 [55]

B) oxygen is oxidized.

<h3>Further explanation</h3>

Given

photosynthesis reaction

6CO2 + 6H20 ⇒ C6H12O6 + 602

Required

the oxidation compound

Solution

Oxidation-reduction reactions or abbreviated as Redox are chemical reactions in which there is a change in oxidation number

Oxidation is an increase in oxidation number, whereas Reduction is a decrease in oxidation number.

In the photosynthetic reaction, oxidation and reduction reactions occur in:

CO2 to C6H12O6 : reduction

Oxidation number of C from +4 to 0

H2O to O2 : oxidation

Oxidation number of O from -2 to 0

4 0

3 years ago

Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water (H2O) and carb

ICE Princess25 [194]

Answer : The mass of oxygen gas produced will be 4.45 grams

Explanation : Given,

Mass of water = 5.2 g

Molar mass of water = 18 g/mole

Molar mass of $O_2$ = 32 g/mole

The balanced chemical reaction will be,

$6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+6O_2$

First we have to calculate the moles of water.

$\text{Moles of }H_2O=\frac{\text{Mass of }H_2O}{\text{Molar mass of }H_2O}$

$\text{Moles of }H_2O=\frac{2.5g}{18g/mole}=0.139mole$

Now we have to calculate the moles of oxygen.

From the balanced chemical reaction, we conclude that

As, 6 moles of water react to give 6 moles of oxygen gas

So, 0.139 moles of water react to give 0.139 moles of oxygen gas

Now we have to calculate the mass of oxygen gas.

$\text{Mass of }O_2=\text{Moles of }O_2\times \text{Molar mass of }O_2$

$\text{Mass of }O_2=0.139mole\times 32g/mole=4.45g$

Therefore, the mass of oxygen gas produced will be 4.45 grams

7 0

3 years ago