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Oliga [24]
3 years ago
15

What does the plasma membrane do? A. makes food for the cell B. reproduces cells C. keeps the cell small D. encloses specific st

ructures
Chemistry
2 answers:
Hoochie [10]3 years ago
5 0

Answer:

the answer is  D. encloses specific structures

Explanation:

Mila [183]3 years ago
3 0
<span>D. encloses specific structures</span>
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A 30.0 mL sample of 0.200 M Ba(OH)2 is titrated with 0.100 M HCl.
Phantasy [73]

Answer:

what's the question? is it A

7 0
3 years ago
How many moles of carbon dioxide (CO2) are in a 22 gram sample?
Anvisha [2.4K]

Answer:

0.5 mole

Explanation:

C=12u

O=16u

1 mole carbon dioxide=44 grams

so 22grams = 0.5 mole

6 0
3 years ago
You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standar
torisob [31]

Based on Beer-Lambert's Law,

A = εcl ------(1)

where A = absorbance

ε = molar absorptivity

c = concentration

l = path length

Step 1: Calculate the concentration of the diluted Fe3+ standard

Use:

V1M1 = V2M2

M2 = V1M1/V2 = 10 ml*6.35*10⁻⁴M/55 ml = 1.154*10⁻⁴ M

Step 2 : Calculate the concentration of the sample solution

Based on equation (1) we have:

A(Fe3+) = ε(1.154*10⁻⁴)(1)

A(sample) = ε(C)(4.4)

It is given that the absorbances match under the given path length conditions, i.e.

ε(1.154*10⁻⁴)(1) = ε(C)(4.4)

C = 0.262*10⁻⁴ M

This is the concentration of Fe3+ in 100 ml of well water sample

Step 3: Calculate the concentration of Fe3+ in the original sample

Use V1M1 = V2M2

M1 = V2M2/V1 = 100 ml * 0.262*10⁻⁴ M/35 ml = 7.49*10⁻⁵M

Ans: Concentration of F3+ in the well water sample is 7.49*10⁻⁵M


7 0
3 years ago
Counting atoms and balancing....please help :)
Tresset [83]

Answer:

3H20 - 6

3NH4OH - 15

4Ca(C2H3O2)2 - 24

Explanation:

Not so sure but I tried

5 0
2 years ago
5.
SIZIF [17.4K]

Answer:

The term reduction means you are reducing the componenets of the air.

Explanation:

8 0
3 years ago
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