Ask question

Ask question

All categories

2 years ago

15

Lead of mass 0.75kg is heated from 21°c to its melting point and continues to be heated unit it has all melted. Calculate how mu

ch energy is supplied to the lead. [Melting point of lead 372.5°c specific latent heat of fusion of lead = 23000 Jkg 'k ']

1 answer:

maksim [4K]2 years ago

7 0

Answer:

65.5J

Explanation:

ML=Q

ML=MC(change in temperature)

0.75 X 23000 =0.75 X 351 X C

C= 65.5J

You might be interested in

Helllppppppppp Don’t Guess

ruslelena [56]

Answer:

C. Lithium

Explanation:

I Goo gled it and I think that's right.

3 0

2 years ago

A solution in a dish contains 4.0 grams of salt dissolved in 100 grams of water. If 50 grams of the water evaporates, this is ev

MaRussiya [10]

D. A mixture

If the water is evaporating while the salt remains, it means the two are not chemically bonded and therefore are not a compound.

6 0

3 years ago

kifflom [539]

True. Nuclear fusion of hydrogen to form helium occurs naturallyin the sun and other stars. It takes place only at extremely high temperatures.

8 0

2 years ago

A 42.0 mL sample of an NaOH solution is placed in a flask with a few drops of phenolphthalein (indicator). If 11.7 mL of a 0.325

olganol [36]

Please like if you get the answer :)

8 0

2 years ago

Which of the following information can be determined from this isotope: sodium 23 and why?

JulsSmile [24]

<h2>YOUR ANSWER Is number of istopes</h2>

✌️

4 0

2 years ago