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2 years ago

14

True or false? the water-soluble portion of a phospholipid is the polar head, which generally consists of a glycerol molecule li

nked to a phosphate group.

1 answer:

juin [17]2 years ago

6 0

This answer would be true.

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What is the molar mass for 5 mol Na

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22.98977 g/

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Is Oxygen more reactive than Beryllium

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Sugar is used to fill a box that has a volume of 200 cm3. The sugar weighs 316 grams. What is the density of sugar? (Ignore the

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<u>Answer:</u> The density of sugar is $1.58g/cm^3$

<u>Explanation:</u>

To calculate the density of a substance, we use the equation:

$Density=\frac{Mass}{Volume}$

We are given:

Mass of sugar = 316 g

Volume of box = $200cm^3$

Putting values in above equation, we get:

$\text{Density of sugar}=\frac{316g}{200cm^3}\\\\\text{Density of sugar}=1.58g/cm^3$

Hence, the density of sugar is $1.58g/cm^3$

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3 years ago

Consider two solutions, solution A and solution B. [H+] in solution A is 500 times greater than that in solution B. what is the

Crank

Answer: The difference in the pH values of the two solutions is 2.7

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

a) For solution A, let $[H^+]$ = $0.0001\times 500M=0.05M$

Putting in the values:

$pH=-\log[0.05]$

$pH=1.3$

b) For solution B, $[H^+]$ = $0.0001M$

Putting in the values:

$pH=-\log[0.0001]$

$pH=4$

Thus the difference in pH will be (4-1.3)= 2.7.

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3 years ago

Ice floats in water because it _____. is less dense than water contains more oxygen than water has a higher pH than water has mo

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Answer:

it is less dense than water

Explanation:

odyssey ware

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3 years ago