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Aleksandr-060686 [28]
2 years ago
12

Radiation takes place with________ between a heat source and an object.

Chemistry
1 answer:
creativ13 [48]2 years ago
8 0

Answer:

radiation takes place with energy between a heat source and an object

Explanation:

g o o g l e

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A uranium atom has 92 protons in its nucleus. how many electrons does it have?
sweet [91]
In a balanced, non-charged atom, the number of protons (positive charge) is equal to the number of electrons (negative charge)

So there are 92 electrons
4 0
3 years ago
Read 2 more answers
The diagram above shows the repeating groups of atoms that make up two samples. Will the
Tcecarenko [31]
Yes it’s d yes yes yes
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3 years ago
Determine the concentration of a solution (M) made by dissolving 18.8 g of sodium chloride (NaCl) in 750.0 mL of solution.
Viefleur [7K]

Answer:

0.429 M

Explanation:

To find the molarity, you need to (1) convert grams to moles (using the molar mass), then (2) convert mL to L, and then (3) calculate the molarity (using the molarity ratio).

(Step 1)

Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol

Molar Mass (NaCl): 58.443 g/mol

18.8 grams NaCl               1 mole
--------------------------  x  ------------------------  =  0.322 moles NaCl
                                     58.443 grams

(Step 2)

1,000 mL = L

 750.0 mL                1 L
------------------  x  -----------------  =  0.7500 L
                            1,000 mL

(Step 3)

Molarity (M) = moles / volume (L)

Molarity = 0.332 moles / 0.7500 L

Molarity = 0.429 M

5 0
1 year ago
673.5 in scientific notation
Sholpan [36]
673.5 in scientific notation would be 6.735 X 10^2.
7 0
3 years ago
If 22.6 grams of an aqueous solution of zinc nitrate, Zn(NO3)2, contains 5.08 grams of zinc nitrate, what is the percentage by m
sesenic [268]

Answer:

22.5%

Explanation:

To find percentage by mass, you divide the mass of the solute by the mass of the solvent.

5.08 g/22.6 g = 0.2248 = 22.5%

5 0
3 years ago
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