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seraphim [82]
3 years ago
11

1. The most basic units of any element are its

Chemistry
1 answer:
baherus [9]3 years ago
5 0

Answer:

The atom

Explanation:

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A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg
bulgar [2K]

Answer:

  1140 mmHg

Explanation:

1 atmosphere is 760 mmHg, so 1.5 atmospheres is ...

  1.5×760 mmHg = 1140 mmHg

4 0
3 years ago
Determine the number of moles in 4.21 x 10^23 molecules of CaCI2?????
Alla [95]

Explanation:

Given parameters:

Number of molecules = 4.21 x 10²³ molecules

Unknown parameters:

Number of moles

Solution:

A mole can be defined as the amount of a substance that contains the avogadro's number of particles i.e 6.02 x 10²³

  To find the number of moles:

          Number of moles = \frac{number of molecules }{[tex]6.02 x 10^{23}}[/tex]

  Number of moles =  \frac{4.21 x 10[tex]^{23} }{6.02 x 10^{23}}[/tex]

Number of moles of CaCl₂ = 0.699moles

Learn more;

mole calculation brainly.com/question/13064292

#learnwithBrainly

8 0
3 years ago
Will a helicopter work in a vacuum
Viefleur [7K]
No, there’s not any pressure
5 0
3 years ago
POSSIB
siniylev [52]

Answer:

96.99 C degree change

Explanation:

  480 cal  / ( 150 g * .033 cal/g-C )  = 96.99 C

8 0
2 years ago
Is the enthalpy change when 1 mole of a substance undergoes complete
ipn [44]

Answer:

Explanation:

Standard enthalpy of combustion (ΔH∘C) is the enthalpy change when 1 mole of a substance burns under standard state conditions;

7 0
3 years ago
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