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3 years ago

How much cooking liquid is needed when employing the pasta method?

Chemistry

2 answers:

Sonbull [250]3 years ago

8 0

A l l of IT? idk im 7

Crank3 years ago

8 0

Answer: A lot, but depending of how much pasta/rice you´re cooking.

Explanation: There are several users of the pasta method around the Internet that define the correct amount of water with "what seems right to you", and believe it or not this migh not be a lie at all. One of the constants that I've found on this method is the instinct. Put as much water as you wish, but your boiling vessel has to look good! A recipe that generates crave at sight.

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Which mass is easily forgotten about when trying to prove the law of conservation of mass in a chemical reaction.

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3 years ago

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sodium reacts with chlorine gas to form sodium chloride. if you have 60 L of chlorine gas at STP and 30 g of sodium, how many gr

Stels [109]

Answer:

75.9 grams of salt

Explanation:

The reaction is the following:

2Na(s) + Cl₂(g) → 2NaCl(s) (1)

We have:

m(Na): the mass of sodium = 30 g

V(Cl₂): the volume of the chlorine gas at STP = 60 L

So, to find the mass of NaCl we need to calculate the number of moles of Na and Cl₂.

$n_{Na} = \frac{m}{A_{r}} = \frac{30 g}{22.99 g/mol} = 1.30 moles$

The number of moles of Cl₂ can be found by the Ideal gas law equation:

$PV = n_{Cl_{2}}RT$

Where:

P: is the pressure = 1 atm (at STP)

R: is the gas constant = 0.082 L*atm/(K*mol)

T: is the temperature = 273 K (at STP)

$n_{Cl_{2}} = \frac{PV}{RT} = \frac{1 atm*60 L}{0.082 L*atm/(K*mol)*273 K} = 2.68 moles$

Now we need to find the limiting reactant. From the stoichiometric relation between Na and Cl₂ (equation 1), we have that 2 moles of Na react with 1 mol of Cl₂, so:

$n_{Na} = \frac{2 moles Na}{1 mol Cl_{2}}*2.68 moles Cl_{2} = 5.36 moles$

Since we have 1.30 moles of Na, the limiting reactant is Na.

Finally, we can find the number of moles of NaCl and its mass.

$n_{NaCl} = n_{Na} = 1.30 moles$

$m_{NaCl} = n_{NaCl}*M = 1.30 moles*58.44 g/mol = 75.9 g$

Therefore, would be formed 75.9 grams of salt.

I hope it helps you!

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2 years ago

What is the best definition of the enthalpy change Hr

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Answer:

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2 years ago

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MArishka [77]

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Now the last time i have done physics was last year. but i'm pretty confident in this answer. Hope this helps!

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3 years ago

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When sugar is dissolved in hot tea, physical changes occur. Write two physical properties of sugar

kompoz [17]

Answer:

When you mix the sugar into the tea and stir, it dissolves so you can't see it. Also when you stir the sugar into the tea the taste changes and it turns sweeter.

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