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Elena L [17]
3 years ago
10

The universe displays _____.

Chemistry
2 answers:
stiks02 [169]3 years ago
7 0
ITS B) THE FULL SPECTRUM OF LIGHT


EXPLANATION:





Orlov [11]3 years ago
4 0

Answer:

B) the full spectrum of light

Explanation:

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Thomas has 235 grams of K2S in the chemistry lab. How many atoms of potassium (K) are in 235 grams of the compound?
iVinArrow [24]

The  number of atoms  of K that are in 235 g  of the compound  is

2.57 x10^24 atoms


 calculation

Step 1:  find the moles of K2S

= moles = mass/molar mass

=  235 g/110 g/mol= 2.136  moles

Step 2: multiply  2.136 moles  by no. of K atoms in K2S

= 2.136  x2 = 4.272 moles


Step 3: use the Avogadro's  law to determine number of K atoms

that is according to Avogadro's law  1 mole = 6.02 x 10^23  atoms

                                                            4.272 moles= ? atoms

by cross multiplication

= (4.272  moles x 6.02 x10^23 atoms)  / 1 mole = 2.57 x10^24 atoms

4 0
3 years ago
How many moles of carbon are in 3.5 L?
SashulF [63]

Answer:

0.16mole

Explanation:

To solve this problem, we are going to assume that the number of moles of carbon to be determined is that at STP, standard temperature and pressure.

The number of moles of a substance at STP is given as;

 Number of moles  = \frac{volume}{22.4}  

Given volume  = 3.5L

Now, insert the parameters;

     Number of moles  = \frac{3.5}{22.4}   = 0.16mole

8 0
3 years ago
Using the periodic table as a reference, which pair of elements are nonmetals?
mr_godi [17]

Answer:

Hello Friend, I've done my personal research, if the answer that's provided is incorrect, my apologies.

A. Oxygen and Sulfur.

Explanation: There are about 10 non metal elements on the periodic table. The pair (Oxygen and Sulfur) are both non metal.

5 0
3 years ago
When a hydrochloric acid solution is combined with
adoni [48]

Answer:

HCl(aq) + KOH(aq --> KCl(aq) + H₂O(l)

Explanation:

4 0
3 years ago
Which is an example of heat energy being transferred by radiation? * 10 points A A pot of water boils on a stove B Hot water mel
andrew11 [14]

Answer:

A

Explanation:

The stove is a form of gas, you feel the heat of the fire via radiation. CONVECTION. Heat transfer in fluids generally takes place via convection.

5 0
3 years ago
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