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3 years ago

What do molecular clocks have to do with reaction rates?

1 answer:

5 0

The atomic clock is a procedure that uses the change rate of biomolecules to reason the time in ancient times when at least two living things veered. A device utilized by developmental scientists to gauge the rate of speciation utilizing changes in DNA.
Change in DNA/time = biological rate

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A 21.496 grams sample of magnesium is burned in air to form magnesium oxide and magnesium nitride. When the products are treated

Bond [772]

25.898 g is the amount of magnesium nitride and magnesium oxide formed.

Step1 2Mg(s)+ O2(g)-----> 2 MgO(s)

3Mg(s)+N2(g)------> Mg3N2(s)

Mg3N2(s)+ 6 H2O(l)---> 3Mg(OH)2 + 2 NH3(g)

Step2 Moles of NH3 = (2.813/17)

Moles of Mg3N2= (1/2) Moles of NH3 = (2.813/2x17)= 2.813/34

Mass of Mg3N2 = (2.813/34) x100 =8.274g (Molar mass of Mg3N2=100)

Step3 Mass of Mg in Mg3N2 =(72/100) x8.274 =5.957g

Mass of Mg converted in MgO= 21.496-5.957=15.539

Moles of MgO= Moles of Mg = 15.539/24

Mass of MgO = 15.539x40/24 =25.898 g.

Magnesium is a cofactor for over 300 enzymatic systems that regulate various biochemical reactions in the body, including protein synthesis, muscle and nerve function, glycemic control, and blood pressure regulation [1-3].

Learn more about magnesium at

brainly.com/question/5759562

#SPJ1

8 0

1 year ago

Write and balance sodium when it burns in air to form sodium peroxide

Zanzabum

Answer:7.229 grams of oxygen is formed by the complete reaction of 35.23 g of metallic sodium with oxygen at 130–200 °C, a process that generates sodium oxide, which in a separate stage absorbs oxygen: 4 Na + O2 → 2 Na2O. The ozone oxidizes the sodium to form sodium peroxide.

7 0

2 years ago

Putting a straw in a glass of water can often make the straw look broken, even though it is in perfect condition. Which of the f

nika2105 [10]

Explanation:

B. The light bends in the water causing the straw to look different.

This happens due to the refraction of light.

6 0

3 years ago

Geothermal energy is an alternative energy source. However, it is not resourceful enough to replace more than a minor amount of

Brums [2.3K]

A- Drilling through the Earth to reach areas is useful but expensive

6 0

4 years ago

N2(g) + 3H2-> 2NH3(g) How many grams of ammonia (NH3) can be produced from the reaction of 28.0 g of N2 and 25.0 g of H2?

Mars2501 [29]

Answer:

34 g of NH₃ were produced in the reaction

Explanation:

N₂ (g) + 3H₂ (g) → 2NH₃ (g)

Moles of N₂ → 28 g / 28 g/m = 1 mol

Moles of H₂ → 25g / 2 g/m = 12.5 moles

Clearly, the limiting is the nitrogen.

1 mol of N₂ produced 2 moles of ammonia

So, If I have 1 mol, I'll produce the same amount

2 moles of NH₃ = Mol . Molar mass

2 m . 17 g/m = 34 g

4 0

3 years ago