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ch4aika [34]
3 years ago
7

Where did the mass of the forest trees come from?

Chemistry
1 answer:
jenyasd209 [6]3 years ago
8 0
The mass of a tree is primarily carbon. The carbon comes from carbon dioxide used during photosynthesis. During photosynthesis, plants convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.
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What mass of copper is required to replace silver from 4.00g of silver nitrate dissolved in water?
larisa [96]
The balanced chemical reaction is written as:

<span>Cu +2AgNO3 → Cu(NO3)2 + 2Ag
</span>
We are given the amount of silver nitrate to be used for the reaction. This value will be the starting point of our calculations. It is as follows:

4.00 g AgNO3 ( 1 mol / 169.87 g ) ( 1 mol Cu / 2 mol AgNO3 ) ( 63.456 g / 1 mol ) = 0.747 g Cu
3 0
3 years ago
Write the isotope notation for the following isotope: copper-63, copper-65, magnesium-24, magnesium-25, magnesium-26, lithium-6,
andrey2020 [161]
63/29 Cu (copper-63)
65/29 Cu (copper-65)
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25/12 Mg (magnesium 25)
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7/3 Li (lithium 7)

The top number is the mass number and you find that by adding the number of neutrons and atomic number
The bottom number is the atomic number and it’s the number or protons
3 0
2 years ago
The equation 2al(s) + 3br2(l) → 2albr3(s) is a(n) ______________ reaction.
Svetach [21]
Combination
Hope this helps :)
7 0
3 years ago
The specific heats at constant pressure of some common gases are provided as a thirdorder polynomial: �;&lt;&lt;&lt; = � + �� +
3241004551 [841]

Answer:

1.991 kJ

Explanation:

Calculate the amount of heat ( J )

CH4 ;

coefficients are :  a = 19.89 , b = 5.02 * 10^-2 , c = 1.269 * 10^-5 , d = -11.01 * 10^-9

attached below is the detailed solution

3 0
2 years ago
6. Three ice cubes are placed inside a glass of hot chocolate. Which of the following best
ycow [4]
It’s the first 1 M yea it’s the first one
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