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3 years ago

Which best explains how photosynthesis is helpful to humans?

Chemistry

1 answer:

marissa [1.9K]3 years ago

5 0

Answer:

It reduces the amount of harmful rays released by the sun. It increases the levels of carbon dioxide in the air.

Explanation:

<em>PWLS MARK ME BRAINLIEST*</em>

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A spinner is divided into sections of equal size, of which some are red, some are blue, and the remaining are green. The probabi

Mariana [72]

There's a total of 3 colors, the percent will add up to 100%

100%-50%(red)= 50%
50%-10%(blue)=40%

There is a 40% chance it will land on green

7 0

3 years ago

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Balance the following chemical equation

ratelena [41]

Answer:

Explanation:

4). Ca(NO₃)₂ + Na₂SO₄ → CaSO₄ + 2Na(NO₃)₂

This question is incorrect.

Since, the final product by reacting Na⁺⁺ and NO₃⁻⁻ is NaNO₃

Correct equation will be,

Ca(NO₃)₂ + Na₂SO₄ → CaSO₄ + 2NaNO₃

This equation is in the balanced form.

5). Ni(NO₃)₂ + KI → NiI + 2K(NO₃)₂

Correct equation will be,

Ni(NO₃)₂ + KI → NiI₂ + 2KNO₃

[Since final product by reacting Ni⁺⁺ and I⁻ is NiI₂]

Balanced form of this equation will be,

Ni(NO₃)₂ + 2KI → NiI₂ + 2KNO₃

6). Ni(NO₃)₂ + KOH → NiOH + K(NO₃)₂

Correct form of the equation will be

Ni(NO₃)₂ + KOH → Ni(OH)₂ + KNO₃

[Since reaction of Ni⁺⁺ and OH⁻ gives Ni(OH)₂ and the reaction of K⁺ and NO₃⁻ gives KNO₃]

Now balancing this equation,

Ni(NO₃)₂ + KOH → Ni(OH)₂ + 2KNO₃

↓

Ni(NO₃)₂ + 2KOH → Ni(OH)₂ + 2KNO₃

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4 years ago

Calculate the wavelength in nm of ultraviolet light with frequency of 5.5 x 10¹⁵ Hz.

snow_tiger [21]

Answer: Wavelength of ultraviolet light is 54 nm.

Explanation:

Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.

The relationship between wavelength and frequency of the wave follows the equation:

$\nu=\frac{c}{\lambda}$

where,

$\nu$ = frequency of the wave = $5.5\times 10^{15}Hz$

c = speed of light = $3\times 10^8ms^{-1}$

$\lambda$ = wavelength of the wave

Putting in the values we get:

$5.5\times 10^{15}s^{-1}=\frac{3\times 10^8ms^{-1}}{\lambda}$

$\lambda=0.54\times 10^{-7}m$

$1nm=10^{-9}m$

$\lambda=54nm$

Thus wavelength of ultraviolet light is 54 nm.

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3 years ago

Careless work, fraud, biases, confirmation bias, are all examples of ________________.

Naddika [18.5K]

Answer:

Poor Science

Explanation:

I took the quiz also just think that doesn't seem like a good, higher level scientist, or popular one, SO THERE YOU GUYS GO!!!

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3 years ago

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Can you think of other possible ways scientists can determine what climate was like in the past besides studying ice cores?

Digiron [165]

Answer:

glacer changing

Explanation:

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4 years ago

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Which best explains how photosynthesis is helpful to humans?​

Which best explains how photosynthesis is helpful to humans?