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3 years ago

Please help with this chemistry question it’s due by midnight

Chemistry

1 answer:

Scilla [17]3 years ago

3 0

Answer:

HF is the limiting reactant

Explanation:

The balanced equation for the reaction is given below:

SiO₂ + 4HF —> SiF₄ + 2H₂O

From the balanced equation above,

1 mole of SiO₂ reacted with 4 moles of HF.

Finally, we shall determine the limiting reactant. This can be obtained as illustrated below:

From the balanced equation above,

1 mole of SiO₂ reacted with 4 moles of HF.

Therefore, 7.5 moles of SiO₂ will react with = 7.5 × 4 = 30 moles of HF.

From the calculation made above, we can see clearly that it will take a higher amount (i.e 30 moles) of HF than what was given from the question (i.e 5 moles) to react completely with 7.5 moles of SiO₂.

Therefore, HF is the limiting reactant and SiO₂ is the excess reactant.

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According to Le Chatelier’s principle, what happens when the concentration of reactants is doubled ina chemical reaction that wa

Paraphin [41]

The equilibrium shifts to the right to favor the formation of the products. Le Chatelier's principle states that a system will do what it takes to negate any changes made or added to it.

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4 years ago

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Each carbon atom has six protons. what does this tell you?

Liula [17]

The answer is A.) because each carbon atom has six electrons meaning that there are six protons.

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3 years ago

The triple point of nitrogen occurs at a temperature of 63.1 K and a pressure of 0.127 atm. Its normal boiling point is 77.4 K.

yulyashka [42]

Nitrogen has a normal boiling point of 77.4 K and a melting point (at 1 atm) of 63.2 K. Its critical temperature is 126.2 K, and its critical pressure is 2.55 * 104 torr. It has a triple point at 63.1 K and 94.0 torr.

<h3>What is the triple point?</h3>

The temperature and pressure at which the solid, liquid, and vapour phases of a pure substance can coexist in equilibrium.

- Normal melting point: 63.2 K.

- Normal boiling point: 77.4 K.

- Triple point: 0.127 atm and 63.1 K.

- Critical point: 33.5 atm and 126.0 K.

In such a way:

- N2 does not exist as a liquid at pressures below 0.127 atm: that is because below this point, solid N2 exists only (triple point).

- N2 is a solid at 16.7 atm and 56.5 K: that is because it is above the triple point, below the critical point and below the normal melting point.

- N2 is a liquid at 1.00 atm and 73.9 K: that is because it is above the triple point, below the critical point and below the normal boiling point.

- N2 is a gas at 0.127 atm and 84.0 K: that is because it is above the triple point temperature at the triple point pressure.

Learn more about triple point here:

brainly.com/question/23307017

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2 years ago

The measured quantity 0.00410 g written in scientific notation is _______. Using prefixes, the number can be written as ________

vovangra [49]

Answer:

4.10x10⁻³g.

4.10 mg.

Explanation:

Hello,

In this case, considering the given number, we can see it has two digits after the first nonzero digit that is four (4) which is also at the third decimal place, it means that the scientific notation has a negative power as it is at the left of the given zeros, therefore it is:

4.10x10⁻³g.

Moreover, since the proper prefix for the factor x10⁻³ is milli, the number with prefix is:

4.10 mg.

Best regards.

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3 years ago

Why would soap be unable to get laundry completely clean in areas with hard water?

Vesna [10]

Answer:

Soaps behave differently in hard water than soft and it’s not good behavior. Soaps in soft water are able to function as a cleaning agent whereas soaps in hard water are not. The same amount of soap in soft water will form more suds than it will in hard water. This is because hardness minerals react and combine with soap.

Not Going To Be a Idiot. Hope This Helps.

Explanation:

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3 years ago