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musickatia [10]
3 years ago
6

If I have 8 moles of Iron atoms in the products, how many moles of Iron atoms did I start with?

Chemistry
2 answers:
Vika [28.1K]3 years ago
6 0

Answer: You started with 8

Explanation: the amount of products is equal to the amount of reactants

wlad13 [49]3 years ago
6 0

Answer: 8 moles

Explanation: The Law of Conservation states that matter can neither be created nor destroyed. Therefore you must have the same mass after reaction, that you have had before reaction.

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stars,auroras,a neon sign

Explanation:

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3 years ago
At 2°C, the vapor pressure of pure water is 23.76 mmHg and that of a certain seawater sample is 23.09 mmHg. Assuming that seawat
wariber [46]

Answer:

0.808  M

Explanation:

Using Raoult's Law

\frac{P_s}{Pi}= x_i

where:

P_s = vapor pressure of sea water( solution) = 23.09 mmHg

P_i = vapor pressure of pure water (solute) = 23.76 mmHg

x_i = mole fraction of water

∴

\frac{23.09}{23.76}= x_i

x_i = 0.9718

x_i+x_2=1

x_2 = 1- x_i

x_2 = 1- 0.9718

x_2 = 0.0282

x_i = \frac{n_i}{n_i+n_2}  ------ equation (1)

x_2 = \frac{n_2}{n_i+n_2}  ------ equation (2)

where; (n_2) = number of moles of sea water

(n_i) = number of moles of pure water

equating above equation 1 and 2; we have :

\frac{n_2}{n_i}= \frac{0.0282}{0.9178}

= 0.02901

NOW, Molarity =  \frac{moles of sea water}{mass of pure water }*1000

= \frac{0.02901}{18}*1000

= 0.001616*1000

= 1.616 M

As we assume that the sea water contains only NaCl, if NaCl dissociates to Na⁺ and Cl⁻; we have \frac{1.616}{2} =0.808 M

3 0
3 years ago
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Explanation:

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Answer:

C. NaHCO3 → Na2CO3 + H2O + CO2

Explanation:

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» The balanced equations mus be;

{ \rm{ 2NaHCO _{3(aq)} → Na _{2}CO _{3(s)}+ H _{2} O _{(l)} + }CO _{2(g)} }

7 0
2 years ago
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Why did early people most likely choose to settle in Mesopotamia?
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People wanted to settle there because it had good living conditions. There was rich soil, and lots of water sources.

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