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Mazyrski [523]
2 years ago
11

Visible light has an average wavelength of 550 nm. How much energy would be in this wavelength of light? 5 x 10-19​

Chemistry
1 answer:
beks73 [17]2 years ago
3 0

Answer:

E = 3.6×10⁻¹⁹ J

Explanation:

Given data:

Wavelength = 550 nm  (550 ×10⁻⁹ nm)

Energy of wave = ?

Solution:

Formula:

E = h c/λ

c = 3×10⁸ m/s

h = 6.63×10⁻³⁴ Js

Now we will put the values in formula.

E = 6.63×10⁻³⁴ Js × 3×10⁸ m/s /550 ×10⁻⁹ nm

E = 19.89×10⁻²⁶ J.m /550 ×10⁻⁹ nm

E = 0.036×10⁻¹⁷ J

E = 3.6×10⁻¹⁹ J

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What are the four factors that affect the natural selection?
BaLLatris [955]

Answer:

• potential for a species to increase in number

• the heritable genetic variation/ which results from mutation in dna

• the size of a population increases

• competiton for resources that are limited in that specific environment.

Explanation:

these are all factors that would affect natural selection although there are many more.

6 0
3 years ago
Use the following chemical equation to answer the question:
garik1379 [7]

2 atome nitrogen , 1 is correct

5 0
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Besides water, what is the product of a Neutalization Reaction between HClO3 and Sr(OH)2?
nalin [4]

Answer:

The answer to your question is letter d. Sr(ClO₃)₂

Explanation:

Data

Reactants   HClO₃ and Sr(OH)₂

This is a neutralization reaction because the reactants are a base (Sr(OH)₂) and an acid (HClO₃).

The products in a neutralization reaction are always water and a salt.

Balanced chemical reaction

           Sr(OH)₂  +  HClO₃  ⇒  H₂O  +  Sr(ClO₃)₂

8 0
3 years ago
How many grams of NO will be produced from 60.0g of NO2 reacted with excess water in the following chemical reaction?
Lynna [10]

Answer:

Mass = 19.78 g

Explanation:

Given data:

Mass of NO produced = ?

Mass of NO₂ reacted = 60.0 g

Solution:

Chemical equation:

3NO₂(g) + H₂O(l)   →  2HNO₃(g) + NO(g)

Number of moles of NO₂:

Number of moles = mass/molar mass

Number of moles = 60.0 g/ 46 g/mol

Number of moles = 1.3 mol

Now we will compare the moles of NO₂ with NO.

                      NO₂         :           NO

                        3            :            1

                      1.3            :            1/3×1.3 = 0.43 mol

Mass of NO:

Mass = number of moles × molar mass

Mass = 0.43 mol × 46 g/mol

Mass = 19.78 g

6 0
3 years ago
In which equation does the oxidation of the underlined compound occur?
zhuklara [117]

Answer:

<em>This is an oxidation-reduction (redox) reaction: </em>

<em> 2 CuII + 4 e- → 2 Cu0 (reduction) </em>

<em> C0 - 4 e- → CIV (oxidation) </em>

<em> CuO is an oxidizing agent, C is a reducing agent. </em>

<em> cuO – Copper(II) oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02 </em>

<em>Other names: Cupric oxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Copper monoxide source: wikidata, accessed: 2019-09-02, Copper oxide source: wikidata, accessed: 2019-09-02 </em>

<em>Appearance: Black to brown powder </em>

<em>C </em>

<em>Names: Carbon black source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Acetylene black source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Channel black source: wikidata, accessed: 2019-09-02source: NIOSH NPG, accessed: 2019-09-02 </em>

<em>Appearance: Odourless black pellets or extremely fine powder source: ICSC, accessed: 2019-09-04; Black, odorless solid. source: NIOSH NPG, accessed: 2019-09-02 </em>

<em>Products:Cu </em>

<em>Names: Copper source: wikidata, accessed: 2019-09-07source: ICSC, accessed: 2019-09-04, Copper (dusts and mists, as Cu) source: NIOSH NPG, accessed: 2019-09-02, Cu source: wikidata, accessed: 2019-09-07 </em>

<em>Appearance: Solid in various forms. turns green on exposure to moist air source: ICSC, accessed: 2019-09-04; Reddish, lustrous, malleable, odorless solid. source: NIOSH NPG, accessed: 2019-09-02 </em>

<em>CO2 </em>

<em>Names: Carbon dioxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, {{plainlist| source: wikipedia, accessed: 2019-09-27, CO2 source: wikidata, accessed: 2019-09-02 </em>

<em>Appearance: Colorless gas source: wikipedia, accessed: 2019-09-27; Odourless colourless compressed liquefied gas source: ICSC, accessed: 2019-09-04; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.] source: NIOSH NPG, accessed: 2019-09-02</em>

4 0
3 years ago
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