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3 years ago

Why is the cell membrane essential for cell homeostasis?

Chemistry

2 answers:

Alenkasestr [34]3 years ago

5 0

Answer:

Hello! The answer is C. To allow waste to exit the cell.

Explanation:

I did the lesson and the quiz :) Im sure.

Nadya [2.5K]3 years ago

3 0

Hello,

Here is your answer:

The proper answer to this question is option C "To allow waste to exit the cell"! The cell membrane controls the matieral that goes in and out of the cell!

Your answer is C.

If you need anymore help feel free to ask me!

Hope this helps!

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Maurels

lora16 [44]

<h2>Answer:</h2>

the force of gravity turn that potential energy into enough kinetic energy to topple a domino larger than its self.

Explanation:

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6 0

2 years ago

Which of the following is the correct way to express 3,753 in scientific notation?

bekas [8.4K]

Answer:

to make it simple 10 to the power of 3 is 1000, and 1000 multiplied by 3.753 is equal to 3,753.

4 0

3 years ago

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide. Ca) + H2O --> Ca(OH)2 In a particular

mars1129 [50]

Answer:

Percent yield = 92.5%

Explanation:

The question asks for the percent yield which can be defined as:

$\frac{actual yield}{theoretical yield} .100$

Where the actual yield is how much product was obtained, in this case 6.11 g of Ca(OH)₂, and the theoretical yield is how much product could be obtained with the given reactants theoretically, that is if the reaction would work perfectly. So we need to calculate first the theoretical yield.

1. First lets write the chemical equation reaction correctly and check that it is balanced:

CaO + H₂O → Ca(OH)₂

2. Calculate the amount of product Ca(OH)₂ that can be obtained with the given reactants (theoretical yield), which are 5.00g of CaO and excess of water. So the amount of CaO will determined how much Ca(OH)₂ we can obtained.

For this we'll use the molar ratio between CaO and Ca(OH)₂ which we see it is 1:1. For every mol of CaO we'll obtain a mol of Ca(OH)₂. So lets convert the 5.00 g of CaO to moles:

Molar Mass of CaO: 40.078 + 15.999 = 56.077 g/mol

moles of CaO = 5.00 g / 56.077 g/mol = 0.08916 moles

As we said before from the molar ratio moles of Ca(OH)₂ = moles of CaO

So the moles of Ca(OH)₂ that can be obtained are 56.077 g/mol

We need to convert this value to grams:

Molar Mass of Ca(OH)₂ = 40.078 + (15.999 + 1.008)*2 = 74.092 g/mol

Theoretical yield of Ca(OH)₂ = 0.08916 moles x 74.092 g/mol = 6.606 g

3. Calculate the percent yield:

$\frac{actual yield}{theoretical yield} .100$

Percent yield = (6.11 g / 6.606g) x 100 = 92.5 %

5 0

3 years ago

Read 2 more answers

what is the theoretical yield (in mols) of magnesium when 1.1 x 102 mols of lithium reacts with excess magnesium chloride.

Bezzdna [24]

Explanation:

Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound by the molar mass of the compound expressed in grams.

6 0

3 years ago

A volatile organic liquid with known molecular weight is added to a vapor density flask which has a known volume. The flask is h

kakasveta [241]

Answer: Mass of the condensed vapor is 21.35 grams.

Explanation: As a gas, the Ideal Gas Law can be used to determine how many mols there are in the flask on the conditions described in question.

Temperature in K: 273 + 99.3 = 372.4K

Pressure in mmHg: P = 760.5 mmHg

Volume in L: V = 496.3. $10^{-3}$ = 0.5 L