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2 years ago

Which statement describes electromagnetic waves with wavelengths greater than 700 nanometers?

Chemistry

2 answers:

Stells [14]2 years ago

7 0

Answer:

They take the form of heat.

Explanation:

Electromagnetic waves with wavelengths greater than 750 nm are infrared light.

They are not visible to human eyes, but we can feel them as heat on our skin.

B is wrong. It is UV light that causes skin cancer and sunburn.

C is wrong .Visible and UV light have shorter wavelengths.

D is wrong. Human eyes cannot see IR radiation

Digiron [165]2 years ago

5 0

Your're answer is.

(A) They take the form of heat.

Hope this helps you my friend and good luck on the quiz or test.

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6)Explain why a 0.010 M solution of hydrochloric acid, HCl has a pH of 2.00 but a 0.010 M solution of

ExtremeBDS [4]

0.010 M solution of hydrochloric acid, HCl has a pH of 2.00 but a 0.010 M solution of acetic acid, HCH₃COO, is 3.37 is because HCl dissociates more.

<h3>Dissociation</h3>

This is the separation of ions of an ionic compound when it dissolves.

<h3>Hydrogen ion concentration of HCl</h3>

Since 0.010 M solution of hydrochloric acid, HCl has a pH of 2.00 its hydrogen ion concentration is gotten from

pH = -log[H⁺]

So,

$[H^{+} ] = 10^{-pH}$

So, [H⁺] = 10⁻²

<h3>Hydrogen ion concentration of HCH₃COO</h3>

Also, since 0.010 M solution of acetic acid, HCH₃COO, has a pH of 3.37, its hydrogen ion concentration is gotten from

pH = -log[H⁺]

So,

$[H^{+} ] = 10^{-pH}$

So, [H⁺] = 10⁻³°³⁷ = 0.000427 = 4.27 × 10⁻⁴

Since the hydrogen ion concentration of HCl is 10⁻² and the hydrogen ion concentration of HCH₃COO is 4.27 × 10⁻⁴, we see that HCl dissociates more than HCH₃COO.

So, 0.010 M solution of hydrochloric acid, HCl has a pH of 2.00 but a 0.010 M solution of acetic acid, HCH₃COO, is 3.37 is because HCl dissociates more.

Learn more about dissociation here:

brainly.com/question/25854432

5 0

1 year ago

A student has a balloon that looks shiny like a metal and wants to perform an experiment to determine if it contains any metal.

zheka24 [161]

Answer:

Charge the balloon, hold it near an electroscope, and determine if the electroscope leaves move.

Explanation:

The gold leaf electroscope is an instrument used to detect if a body is charged. It has two gold leafs suspended from a brass stem in a vacuumed glass jar and connected to a metal cap(Toppr).

When the test body is allowed to touch the metal cap, a change in the size of the leaves shows whether the body is charged or not.

Since we are suspecting the balloon to be made up of a metal; metals can be charged. We can test if there is really a charge on the balloon by bringing it near an electroscope to see if the electroscope moves.

3 0

2 years ago

Who first arranged the elements according to nuclear charge?

vazorg [7]

Dmitri Mendeleev
<span> Dmitri Mendeleev and Lothar Meyer individually came up with their own periodic law "when the elements are arranged in order of increasing atomic mass,
certain sets of properties recur periodically.</span>

3 0

2 years ago

Read 2 more answers

What are household items that are made up from carbon?

sweet-ann [11.9K]

you’re made partly of carbon so is clothes, furniture, plastics, yr household machines

4 0

1 year ago

Read 2 more answers

The three conditions that encourage the presence of marine life in the ocean are proximity to land, water depth and ____________

Alja [10]

The answer is exposure to sunlight