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3 years ago

What structures are found in plant cells that are not found in animal cells?

Chemistry

1 answer:

Mila [183]3 years ago

3 0

Answer:

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells. The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

Explanation:

MOST BRAINLIEST

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What mass of lead (II) chloride is produced when 200.0 mL of a 0.250 M solution of sodium chloride is mixed with 200.0 mL of a 0

kow [346]

Answer:

Option d. 6.95 g

Explanation:

First of all, we state the reaction:

2NaCl + Pb(NO₃)₂ → PbCl₂ + 2NaNO₃

We determine the moles of each reactant, to state the limiting

Firstly we convert volume frm mL to L

0.200 L . 0.250M = 0.05 moles of NaCl

0.200L . 0.250M = 0.05 moles of Pb(NO₃)₂

Acording to stoichiometry we know that relation is 1:2, so the limiting reagent is the NaCl.

For 1 mol of Pb(NO₃)₂ I need 2 moles of NaCl

For 0.05 moles of Pb(NO₃)₂ I would need, the double → 0.1 moles

(We only have, 0.05 moles of NaCl)

Stoichiometry to the formed product is 2:1

From 2 moles of NaCl I produce 1 mol of PbCl₂

From 0.05 moles I would produce, the half → 0.025 moles

Let's convert the moles to mass → 0.025 mol . 278.1 g / 1mol = 6.95 g

8 0

3 years ago

Explain using the particle theory why objects generally expand when heated and contract when cooled?

seraphim [82]

When heated, particles vibrate faster, thus increasing the distance between one another. The distance between these particles results in changes of state. Therefore, increased molecular motion results in expansion of an object. This works vice versa for cooling. As the vibrations slow down, the particles become closer together. This results in contraction.

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3 years ago

Which functional group is found in methyl ethanoate

Romashka [77]

Answer:

ester

Explanation:

methyl ethanoate is also known as methyl acetate

3 0

3 years ago

Read 2 more answers

Do moles of any substance have the same number of atoms

love history [14]

The term mole refers to 6.02x10²³ atoms or molecules of any substance. so regardless of the substance one mole will always be equivalent to 6.02x10²³

Hope that helps

7 0

3 years ago

A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M., how many grams

geniusboy [140]

A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M. 0.5 grams will be present at 2:00 P.M. on the same day.

Half life is the amount of time required to reduce to one half of its initial value. The symbol of half life is $t_{1/2}$ .

<h3 /><h3>How to calculate the quantity remaining when half life given ?</h3>

It is expressed as:

$N_{t} = N_{0} (\frac{1}{2})^{n}$

where,

N(t) = quantity remaining

N₀ = initial quantity

n = half life that have passed

Now put the values in above expression we get

$N_{t} = 1.0\ g \times (\frac{1}{2})^{1}$

= $\frac{1}{2} g$

= 0.5 gram

Thus from the above conclusion we can say that A certain radioactive isotope has a half life of one hour. I you start with 1.0 g of the material at 1:00 P. M. 0.5 grams will be present at 2:00 P.M. on the same day.

Learn more about the Half life here: brainly.com/question/25750315

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6 0

1 year ago