Answer:
Chlorophyll
Explanation:
chlo·ro·phyll
noun
a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.
S p d and f. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10 4f..
Answer:
700 mL of ethanol would be added
Explanation:
Given data:
Volume of ethanol added to make 40% v/v solution = ?
Total volume of solution = 1750 mL
Solution:
We will calculate the 40% 1750 mL which will be the volume of ethanol added to the water to make 40%v/v solution.
(40/100)× 1750 mL
0.4 × 1750 mL
700 mL
700 mL of ethanol would be added.
Answer:
The Moon weighs about 7.349*10^22 kg
How much does “an elephant” weigh? Grown-up elephants vary between 1.7 tons (small wood elephant cow) and 6 tons (big African elephant bull). Let us pick 2.720 tons or 2720 kg as an average weigh one, this is valid for Asian elephants.
A mole of elephants weighs 6.022 * 10^23 x 2720 kg = 1.638 * 10^27 kg.
That is 1,638 * 10^27 / 7,349*10^22 = 22289 times more.
<u>Answer:</u> The given mass in kilograms is 0.00399 kg
<u>Explanation:</u>
Gram and Kilograms are the units which are used to express the mass of a substance. These units are inter changeable.
We are given:
Mass of a substance = 3.99 g
To convert the given mass into kilograms, we use the conversion factor:
1 kg = 1000 g
Converting the given value, we get:
Hence, the given mass in kilograms is 0.00399 kg
