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4 years ago

What is the force of attraction between the particles in a salt crystal

Chemistry

1 answer:

Papessa [141]4 years ago

4 0

Answer:

Electrostatic attraction between the ions

Step-by-step explanation:

A salt crystal consists of Na⁺ and Cl⁻ ions stacked together in a crystal.

The ions have opposite charges, so they are electrostatically attracted to each other.

Because the ions are so close together, the attractive forces are quite large.

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A student measures a volume as 25 ml, wheras the correct volume is 23 mL. What is the percent error?

otez555 [7]

Answer:

the other number is different

Explanation:

6 0

3 years ago

At constant temperature and pressure, increasing the amount of a gas will __________.

aivan3 [116]

At constant temperature and pressure, increasing the amount of gas will increase the volume.

6 0

3 years ago

Calculate the specific heat capacity for a 22.7-g sample of lead that absorbs 237 J when its temperature increases from 29.8 °C

soldier1979 [14.2K]

Answer:

$\boxed {\boxed {\sf c\approx 0.159 \ J/ g \textdegree C}}$

Explanation:

We are asked to find the specific heat capacity of a sample of lead. The formula for calculating the specific heat capacity is:

$c= \frac{Q}{m \times \Delta T}$

The heat absorbed (Q) is 237 Joules. The mass of the lead sample (m) is 22.7 grams. The change in temperature (ΔT) is the difference between the final temperature and the initial temperature. The temperature increases from 29.8 °C to 95.6 °C.

ΔT = final temperature -inital temperature
ΔT= 95.6 °C - 29.8 °C = 65.8 °C

Now we know all three variables and can substitute them into the formula.

Q= 237 J
m= 22.7 g
ΔT = 65.8 °C

$c= \frac {237 \ J}{22.7 \ g \ \times \ 65.8 \textdegree C}$

Solve the denominator.

22.7 g * 65.8 °C = 1493.66 g °C

$c= \frac {237 \ J}{1493.66 \ g \textdegree C}$

Divide.

$c= 0.1586706479 J /g \textdegree C$

The original values of heat, temperature, and mass all have 3 significant figures, so our answer must have the same. For the number we found that is the thousandth place. The 6 in the ten-thousandth place tells us to round the 8 up to a 9.

$c \approx 0.159 \ J/g \textdegree C$

The specific heat capacity of lead is approximately 0.159 Joules per gram degree Celsius.

3 0

3 years ago

2. Percent recovery and percent yield are occasionally used as if they are interchangeable terms. They do, however, have differe

Mnenie [13.5K]

Answer:

Answer is in the explanation.

Explanation:

The principal difference between percent recovery and percent yield is that the second involves a chemical reaction whereas the first is more about a purification process.

Thus, percent yield is defined as the ratio between amount of product and theoretical yield.

Percent recovery is the ratio between final amount of purified substance and initial amount of substance.

I hope it helps!

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3 years ago

What would happen if all individual in a species were not able to have babies

Korolek [52]

If ALL individuals of a species were not able to have offspring, then that species would eventually become extinct.

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3 years ago