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2 years ago

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The diagram below shows the structures of a plant cell. What is structure 1, and how does it help sustain life? A. Structure 1 i

s a vacuole, which temporarily stores wastes. B. Structure 1 is the cell wall, which provides structural support for the cell. C. Structure 1 is the nucleus, which is the control center of the cell. D. Structure 1 is a chloroplast, which is the site of photosynthesis.

2 answers:

Monica [59]2 years ago

6 0

Answer:

D Structure 1 is a chloroplast which is the site of photosynthesis.

Explanation:

I got it correct on my test

Aneli [31]2 years ago

4 0

From the diagram, structure 1 would be the chloroplast and it represents the site of photosynthesis.

<h3>Plant cells</h3>

The image (see attached) is that of a plant cell and structure labeled 1 is the chloroplast.

The chloroplast of plant cells acts as the site of photosynthesis where inorganic materials are used to synthesize carbohydrates.

Plants generally serve as producers in food chains and thus, chloroplast helps sustain life.

More on plant cells can be found here: brainly.com/question/1894299

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Calculate the molality of 75.0 grams of MgCl2 (molar mass=95.21 g/mol) dissolved in 500.0 g of solvent.

nordsb [41]

<u>Answer:</u> The molality of magnesium chloride is 1.58 m

<u>Explanation:</u>

To calculate the molality of solution, we use the equation:

$\text{Molality}=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

Where,

$m_{solute}$ = Given mass of solute (magnesium chloride) = 75.0

$M_{solute}$ = Molar mass of solute (magnesium chloride) = 95.21 g/mol

$W_{solvent}$ = Mass of solvent = 500.0 g

Putting values in above equation, we get:

$\text{Molality of }MgCl_2=\frac{75.0\times 1000}{95.21\times 500.0}\\\\\text{Molality of }MgCl_2=1.58m$

Hence, the molality of magnesium chloride is 1.58 m

5 0

4 years ago

Read 2 more answers

Enthalpy of combustion of ethyl alcohol, C2 H5 OH, is – 950 kJ mol–1. How much heat is evolved when one gram of ethyl alcohol bu

melomori [17]

<h3>Answer:</h3>

20.62 Kilo-joules

<h3>Explanation:</h3>

The Enthalpy of combustion of ethyl alcohol is -950 kJ/mol.
This means that 1 mole of ethyl alcohol evolves a quantity of heat of 950 Joules when burned.

Molar mass of ethyl ethanol = 46.08 g/mol

Therefore;

46.08 g of C₂H₅OH evolves heat equivalent to 950 kilojoules

We can calculate the amount of heat evolved by 1 g of C₂H₅OH

Heat evolved by 1 g of C₂H₅OH = Molar enthalpy of combustion ÷ Molar mass

= 950 kJ/mol ÷ 46.08 g/mol

= 20.62 Kj/g

Therefore, a gram of C₂H₅OH will evolve 20.62 kilo-joules of heat

7 0

3 years ago

How many sig fig does 0.000925g have

Assoli18 [71]

Answer:

Sig fig 3 decimal 6

Explanation:

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8 0

3 years ago

An alloy is a mixture that has

defon

Answer:

an alloy is a mixture of elements that has metallic properties

Explanation:

8 0

3 years ago

Read 2 more answers

Please help me with this question!!

mestny [16]

Answer: 824.6 g of NaCl are produced from 500.0 g of chlorine.

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$ $\text{Moles of} Cl_2=\frac{500.00g}{71g/mol}=7.04moles$

$2Na+Cl_2\rightarrow 2NaCl$

According to stoichiometry :

1 mole of $Cl_2$ produce = 2 moles of $NaCl$

Thus 7.04 moles of $Cl_2$ will produce= $\frac{2}{1}\times 7.04=14.08moles$ of $NaCl$

Mass of $NaCl=moles\times {\text {Molar mass}}=14.08moles\times 58.5g/mol=824.26g$

Thus 824.6 g of NaCl are produced from 500.0 g of chlorine.

3 0

3 years ago