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3 years ago

I WILL MARK BRAINLIEST ANSWER!

Chemistry

2 answers:

lawyer [7]3 years ago

6 0

Answer:

1. They are made up of two or more Pure substances that are not chemically bonded together and appear non-uniform

Explanation:

edge2020 :)

Zina [86]3 years ago

5 0

Answer:

Explanation:

1. They are made up of two or more Pure substances that are not chemically bonded together and appear non-uniform

A heterogeneous mixture is not chemically combined and its components are visible and can be seen.

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WILL GIVE BRAINLIEST

k0ka [10]

I think the answer would b C

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3 years ago

What are the benefits and dangers of the Iron element in our daily life?

Digiron [165]

Benefits; helps our red blood cells transport oxygen all around our body

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4 years ago

The teal line of the hydrogen emission spectrum has a wavelength of 486.0 nm. A hydrogen emission spectrum has a violet, a blue,

Sloan [31]

Answer:

The correct answer to the following question will be "4.08 × 10⁻¹⁹ Joule".

Explanation:

Given:

Wavelength, λ = 486.0 nm

As we know,

$E=h\upsilon =\frac{hc}{\lambda}$

On putting the estimated values, we get

⇒ $=\frac{1241.5 \ ev\ nm}{486 \ nm}$

⇒ $=2.554 \ ev$

∴ 1 ev = 1.6 × 10⁻¹⁹ J

Now,

Energy, $E=2.554\times 1.6\times 10^{-19}$

⇒ $=4.08\times 10^{-19} Joule$

7 0

3 years ago

A 15.00g solid mixture containing Ca(OH)2, among other non-basic components, was neutralized with 0.2000g of HCl. What was the m

azamat

Answer:

1.373 wt% Ca(OH)₂

Explanation:

Sample mix = 15.0g

Ca(OH)₂(aq) + 2HCl(aq) => CaCl₂(aq) + 2H₂O(l)

moles HCl = 0.2000g / 36 g·mol⁻¹ 0.0056 mol

moles Ca(OH)₂ = 1/2(moles HCl) = 1/2(0.0056 mol) = 0.0028 mol

mass Ca(OH)₂ = 0.0028 mol ( 74 g/mol ) = 0.206 g

mass % Ca(OH)₂ = (0.206/15.0)100% = 1.373 wt%

3 0

3 years ago

Can someone help me please

Romashka [77]

True, False , and I think the last one is true

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3 years ago