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3 years ago

All of the stars in the sky, except for one, are so far away that they look like small points of light.

Chemistry

1 answer:

kiruha [24]3 years ago

8 0

Answer:

The sun.

Explanation:

It is closer to Earth, therefore bigger to us, and not just a small point of light.

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The equilibrium expression for a reaction is Keq=[H+]6[Bi2+]2[H2S]3. Which of the following could be the reaction? A. 6H+(aq) +

Bezzdna [24]

So the question ask to calculate the equilibrium and ask on which of the following choices is the possible reaction and based on my calculation and the use of the formula i came up with an answer of letter B. I hope you are satisfied with my answer and feel free to ask for more.

8 0

4 years ago

Read 2 more answers

HELP ASAP!!!

Paraphin [41]

Solution..
---------------

Let's calculate the mass of CO₂.

We have (12+(16*2))
= 12+32
=44gmol¯¹..

a. What is the percent by mass of carbon?

Mass of carbon /mass of CO₂ × 100%

12/44 × 100%

=27.3%...

b. What is the percent by mass of oxygen?

Mass of oxygen/mass of CO₂ × 100%

(2×16)/44 × 100%

32/44 × 100%

=72.7%....

To check.. You'll add this two percentage compositions together and see of it gives 100%... If it does then we're good...

27.3%+72.7% = 100%.... Checked..

Hope this helped....?

8 0

3 years ago

Read 2 more answers

Chrysanthenone is an unsaturated ketone. If Chrysanthenone has M+ = 150 and contains 2 double bond(s) and 2 ring(s); what is its

snow_lady [41]

Answer:

the Molecular formula will be; C10H14O

Explanation:

Given the data in the question;

Chrysanthenone is an unsaturated ketone,

it has M+ = 150 and contains 2 double bond(s) and 2 ring(s).

molecular formula = ?

we know that ketone contain 1 oxygen and mass of oxygen is 16

so mass of the C and H remaining will be;

⇒ 150 - 16 = 134

Now we determine the number of C atoms;

⇒ 134 / 13 = 10

hydrocarbon with 10 hydrogen atom have CnH2n+2 means

⇒ ( 10 × 2 ) +2 = 22 hydrogens

But then we have 3 unsaturation meaning 6 hydrogens less and also we have ring meaning 2 more hydrogens

⇒ 22 - 6 - 2 = 14

Hence the Molecular formula will be; C10H14O

4 0

3 years ago

Somebody help me with this please very much appreciated

Flauer [41]

The answer for the following answer is explained below.

The answer is NH_{4} ^{+}

Explanation:

Bronsted-Lowry acid :

It is a solution that donates protons, and is known as a proton donor.It donates protons in the form of hydrogen ion( $H^{+}$ ).This is reinforced by the definition of an acid ,which is a solution that has hydrogen ions.

In Bronsted-Lowry aci it must contain a hydrogen io that it can give up.When the acid gives a hydrogen ion,the charge of an acid decreases.

Here,

NH_{4} ^{+} loses one hydrogen ion and forms ammonia molecule.

So therefore the Bronsted-Lowry acid is NH_{4} ^{+}.

7 0

3 years ago

PLEASE HELP! IM TRYNA GET A GOOD GRADE! I ONLY HAVE 6 MINS LEFFTT

Arte-miy333 [17]

Answer:

<h2>answer - b molarity </h2>

Explanation:

<h2>please like me</h2><h2>I hope answer correct</h2>

6 0

3 years ago