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yaroslaw [1]
3 years ago
15

Which of the following statements is correct?

Chemistry
2 answers:
marshall27 [118]3 years ago
8 0

Answer:

that was wrong

ty

Explanation:

RoseWind [281]3 years ago
7 0
D. Blue litmus paper turns red when placed in a base.
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Whats the main difference between a double replacement reaction and a single replacement
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Answer:

a single-replacement reaction replaces one element for another in a compound. A double-replacement reaction exchanges the cations, or the anions, of two ionic compounds.

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3 years ago
How many moles of atoms are in 9.00 g of 13c?
Blababa [14]
<span>The atomic weight of 13C should be pretty close to 13.0. (If you have the exact mass, use it in the problem.) So, 9.00 g / 13.0 g/mol = 0.692 moles Therefore, the answer should be 0.692 moles are in 9.00 g of 13C.</span>
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3 years ago
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What is the charge of the nucleus in an Adam of oxygen -17
Ivenika [448]
Charge of nucleus is always positive whether it is element or isotope.
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3 years ago
!!!!HELP PLEASE!!!!!Which of the following molecules has a trigonal pyramidal shape?
aksik [14]

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No.D is the molecules that has trigonal pyramidal sape

8 0
3 years ago
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What is the pressure in a 245 L tank that contains 5.21 kg of helium at 27 Celsius ​
Kitty [74]
<h2><u>Answer:</u></h2>

(These are not rounded to the correct decimal)

130.94 atm

13,266.6 kPa

99,571.4 mmHg

<h2><u>Explanation:</u></h2>

<u></u>

PV = nRT

V = 245L

P = ?

R = 0.08206 (atm) , 8.314 (kPa) , 62.4 (mmHg)

T = 273.15 + 27 = 300.15K

n = 1302.5 moles

How I found (n).

5.21kg x 1000g/1kg x 1 mole/4.0g = 1302.5 moles

Now, plug all the numbers into the equation.

Pressure in atm = (1302.5)(0.08206)(300.15) / 245 = 130.94 atm (not rounded to the correct decimal)

Pressure in kPa = (1302.5)(8.314)(300.15) / 245 = 13,266.6 kPa (not rounded to the correct decimal)

Pressure in mmHg = (1302.5)(62.4)(300.15) / 245 = 99,571.4 mmHg (not rounded to the correct decimal)

5 0
3 years ago
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