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3 years ago

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I have two solutions. In the first solution, 1.0 moles of sodium chloride is dissolved to make 1.0 liters of solution. In the se

cond one, 1.0 moles of sodium chloride is added to 1.0 liters of water. is the molarity of each solution the same?

1 answer:

charle [14.2K]3 years ago

6 0

i not sure but I think yes

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Two conditions are required for cloud formation:cooling of the air and

Lelechka [254]

Answer:

Presence of water molecules

Explanation:

Temperature decreases with an increase in altitude. At sufficiently high altitudes, the air is much colder than the air on the surface of the Earth. Water vapor has a low density and is capable to rise until it gets into a medium with a significantly low temperature and pressure to condense and produce water droplets out of water vapor. Those droplets then form clouds.

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3 years ago

For the following reactions, write a balanced equation using half-reactions and calculate the voltage to be expected.

Iteru [2.4K]

a) $2Na(s) +2H_2O(I)$ → $2Na^+(aq) + OH^-(aq)+ H_2(g)$

b) $2Ag (s) +2H^(aq)$ → $2 Ag^+ (aq) +H_2(g)$

<h3>What are half-reactions?</h3>

The half-reaction method is a way to balance redox reactions. It involves breaking the overall equation down into an oxidation part and a reduction part.

a)

$2Na(s) +2H_2O(I)$ → $2Na^+(aq) + OH^-(aq)+ H_2(g)$

$E^0 cell = E^0 (reduction) - E^0 (oxidation)$

= $E^0(\frac{H_2O}{H_2}, OH^-) -E^0(Na^+/Na)$

= -0.83 - (-2.71) =1.88V

b)

$2Ag (s) +2H^(aq)$ → $2 Ag^+ (aq) +H_2(g)$

$E^0cell$ = $E^0(H^+/H_2) -E^0(Ag^+/Ag)$

$E^0cell$ =-0. - (0.8) =-0.8V

Learn more about the half-reactions here:

https://brainly.in/question/18053421

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2 years ago

If a chemical reaction produces 20.0 grams of product, but by stoichiometry it is supposed to have 25.0 grams of product; what i

Vitek1552 [10]

ThThe percentage yield is 80

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2 years ago

1. A student determines the density of water to be 0.966g/ml at a

lions [1.4K]

<u>Answer:</u>

<em>The percentage error in the measurement is 2.4% </em>

<u>Explanation:</u>

The measurement made by the student is $0.966 g/cm^3$ .

But the actual value of density is $0.943 g/cm^3$

The formula to calculate percentage error is

percentage error = $\frac{(measured \ value-actual \ value)}{(actual \ value)} \times 100$

Hence percentage error in this case is given by

<em>Percentage error = $\frac{(0.966-0.943)}{0.943} \times 100$ </em>

<em>= $\frac{0.023}{0.943} \times 100=2.4%$ </em>

A physical quantities value will be determines by various quantities. If errors are made in measuring any of these quantities there will be error in the measurement of the final physical quantity as well.

Here density of a substance is a derived quantity determined by measuring mass and volume of that substance.<em> If errors are made in mass and volume measurements the density value will also be erroneous. </em>

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3 years ago

When one of the atoms involved in a covalent bond has a much higher electronegativity than the other atom, what type of bond res

ICE Princess25 [194]

If electronegativity difference between atoms is much higher then they form ionic bond.

Hope this helps!

5 0

4 years ago