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AVprozaik [17]
2 years ago
10

I have a question can someone answer these questions for me please?

Chemistry
1 answer:
Kitty [74]2 years ago
8 0
1. C
2. E
3. A
4. B
5. D
I hope that helps <3
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An aluminum ion has a +3 charge. What change did the atom undergo to attain this charge?
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When an ion loses electrons, it becomes a positive ion even though it does not lose protons. If there are more protons than electrons in the ion, the ion will have a positive charge.
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3 years ago
What percentage of the formula mass of Na2SO4 does sodium constitute?
Ganezh [65]

Molar mass of Na2SO4*10H2O is 322.1949 g/mol

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True or false(Internal forces act on the outside of an object, and external forces act within an object.)
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4 0
3 years ago
What volume of 24% trichloroacetic acid (tca) is needed to prepare eight 3 ounce bottles of 10% tca solution?
Sever21 [200]

Answer:

295.7 mL of 24% trichloroacetic acid (tca) is needed .

Explanation:

Let the volume of 24% trichloroacetic acid solution be x

Volume of required 10% trichloroacetic acid solution =8 bottles of 3 ounces

= 24 ounces = 709.68 mL

(1 ounces =  29.57 mL)

Amount of trichloroacetic acid in 24% solution of x volume of solution will be equal to amount of trichloroacetic acid in 10% solution of volume 709.68 mL.

x\times \frac{24}{100}=709.68 mL\times \frac{10}{100}

x = 295.7 mL

295.7 mL of 24% trichloroacetic acid (tca) is needed .

6 0
3 years ago
What volume in litres will 38gr of F2 occupy at 0.999 bar and 273 K
FrozenT [24]

Answer:

V=22.68L

Explanation:

Hello,

In this case, we use the ideal gas equation to compute the volume as shown below:

PV=nRT\\\\V=\frac{nRT}{P}

Nonetheless we are given mass, for that reason we must compute the moles of gaseous fluorine (molar mass: 38 g/mol) as shown below:

n=38 g *\frac{x}{y}  \frac{1mol}{38 g} =1mol

Thus, we compute the volume with the proper ideal gas constant, R:

V=\frac{1mol*0.083\frac{bar*L}{mol*K}*273K}{0.999bar} \\\\V=22.68L

Best regards.

7 0
3 years ago
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