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almond37 [142]
3 years ago
14

What is the energy of a wave with wavelength of 2.25nm?

Chemistry
1 answer:
umka2103 [35]3 years ago
5 0

Answer:

E = 8.84×10⁻¹⁷ J

Explanation:

Given data:

Wavelength of wave = 2.25 nm (2.25×10⁻⁹ m)

Energy of wave = ?

Solution:

Formula:

E = hc/λ

c = 3×10⁸m/s

h =6.63 ×10⁻³⁴ Js

now we will put the values,

E = 6.63 ×10⁻³⁴ Js ×  3×10⁸m/s / 2.25×10⁻⁹ m

E = 19.89×10⁻²⁶ Jm / 2.25×10⁻⁹ m

E = 8.84×10⁻¹⁷ J

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In a short paragraph, describe how I fuel cell works.
nirvana33 [79]

Explanation:

passing hydrogen through the anode of a fuel cell and oxygen through the cathode.

hopes this helps

7 0
3 years ago
Which statement best describes the formula equation cl1(g) + 2kbr(aq) —> 2kcl(aq)+br2(i)
Zigmanuir [339]

Answer:

The chlorine gas and potassium bromide solution react to form liquid  bromine and potassium chloride solution.

Explanation:

Chemical equation:

Cl₂(g) + KBr (aq) → KCl (aq) + Br₂(l)

Balanced chemical equation:

Cl₂(g) + 2KBr (aq) → 2KCl (aq) + Br₂(l)

This equation showed that the chlorine gas and potassium bromide solution react to form liquid  bromine and potassium chloride solution.

Chlorine is more reactive than bromine it displace the bromine from potassium and form potassium chloride solution.

The given equation is balanced and completely hold the law of conservation of mass.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

8 0
3 years ago
The reducing agent in this catalytic hydrogenation reaction was molecular hydrogen (H2), which was produced in situ (in the reac
creativ13 [48]

Answer:

a)  After the balloon inflated after 440 uL of dropwise due to the reaction of 1-Decene and the solution in the conical vial. b) 4NaBH_{4} + 2HCl + 7H_{2}O ⇒ 16H_{2(g)}+ 2NaCl + Na_{2}B_{4}O_{7} c) No H_{2} was not the limiting reactant.

Explanation:

Generally, hydrogenation is the chemical reaction between a compound or element and molecular hydrogen in the presence of catalysts such as platinum.

a) After the balloon inflated after 440 uL of dropwise 1-Decene solution was added due to the reaction between 1-Decene and the solution in the conical vial.

b)  4NaBH_{4} + 2HCl + 7H_{2}O ⇒ 16H_{2(g)}+ 2NaCl + Na_{2}B_{4}O_{7}

c) H_{2} was not the limiting reactant based on the mol to mol ratio of H_{2} and decane which is 1:1. Therefore, if 0.8 mol of decane was produced then 0.8 mol of H_{2} would also be produced.

4 0
3 years ago
1. How many moles of hydrogen are needed to completely react with two moles of nitrogen?
Arlecino [84]

N2 + 3H2  -->  2NH3

Answer: 6 moles of hydrogen are needed to react with two moles of nitrogen.

Explanation:

4 0
3 years ago
How many meters does daniel have to walker
Tcecarenko [31]

14,200 because all you have to do to solve this is multiply 14.2 kilometers by 1,000 meters to find the distance that he walks.

8 0
4 years ago
Read 2 more answers
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