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2 years ago

What is the mass of ca(oh)2 in 110. mL of 1.244 M ca(oh)2 solution

1 answer:

7 0

V= 110mL = 110cm³ = 0,11dm³
C = 1,244 mol/L = 1,244 mol/dm³

C = n/V
n = 1,244×0,11
n = 0,13684 moles

mCa(OH)₂ = 74 g/mol

1 mole Ca(OH)₂ ------------ 74g
0,13684 ---------------------- X
X = 74×0,13684
X = 10,12616g

:)

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A gaseous mixture contains 443.0 Torr H 2 ( g ) , 369.9 Torr N 2 ( g ) , and 82.7 Torr Ar ( g ) . Calculate the mole fraction, χ

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Answer:

χH₂ = 0.4946

χN₂ = 0.4130

χAr = 0.0923

Explanation:

The total pressure of the mixture (P) is:

P = pH₂ + pN₂ + pAr

P = 443.0 Torr + 369.9 Torr + 82.7 Torr

P = 895.6 Torr

We can find the mole fraction of each gas (χ) using the following expression.

χi = pi / P

χH₂ = pH₂ / P = 443.0 Torr/895.6 Torr = 0.4946

χN₂ = pN₂ / P = 369.9 Torr/895.6 Torr = 0.4130

χAr = pAr / P = 82.7 Torr/895.6 Torr = 0.0923

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What type of chemical bond would form between an atom of lithium (Li) and an atom of chlorine (Cl). Explain specifically why thi

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Explanation:

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And, chlorine is a non-metal with atomic number 17 and its electronic distribution is 2, 8, 7.

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Read 2 more answers

4. If the DNA nitrogen bases were TACCGGAT, how would the other half of

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Answer:

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For this we have to keep in mind that we have a specific relationship between the nitrogen bases:

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-) When we have C (Cytosine) we will have a bond with G (Guanine) and viceversa.

Therefore if we have: TACCGGAT. We have to put the corresponding nitrogen base, so:

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I hope it helps!

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