1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mekhanik [1.2K]
4 years ago
6

The heat of fusion for a substance is 122 joules per gram. How many joules of heat are need to melt 7.50 grams of this substance

at its melting point?
Chemistry
1 answer:
daser333 [38]4 years ago
4 0
<h3>Answer:</h3>

915 Joules

<h3>Explanation:</h3>
  • The heat of fusion is the heat that is required to convert a given mass of a substance from solid state to liquid state without change in temperature.
  • In this case, we are given specific heat of a substance as 122 joules per gram
  • It means that amount of heat equivalent to 122 joules is required to change 1 gram of the substance from solid state to liquid state.
  • Therefore, we can determine the amount of heat needed to change 7.5 grams of the substance from solid to liquid state.

1 g = 122 Joules

7.5 g = ?

       = 122 × 7.5

      = 915 Joules

Thus, 7.5 g of the substance at its melting point will require 915 Joules of heat to melt.

You might be interested in
If the earth was a guava fruit, the space where the seeds are would be the core/mantle​
Bezzdna [24]
Good analysis lol ...
8 0
3 years ago
Read 2 more answers
How many dimes could you trade for 360 pesos? $1 = 1500 pesos.
sveta [45]

Answer:

The correct option is (d).

Explanation:

It is given that,

1$ = 1500 pesos

We need to convert 360 pesos into dimes

We can convert 360 pesos to dollars as follows:

360\ \text{pesos}=\$\dfrac{1}{1500}\times 360\\\\=$0.24

360 pesos is equal to $0.24

Also, 1 dollar = 10 dimes

We can covert 0.24 dollar to dimes as follows :

0.24 dollar = 10 × 0.24 dimes

0.24 dollar = 2.4 dimes

or

360 pesos = 2.4 dimes

7 0
3 years ago
Why was it significant that amino acids were produced from a mixture of methane gas, hydrogen gas, ammonia, and water vapor?
melisa1 [442]

Answer:

It was significant because thanks to Miller's experiment, it was possible to test many years later and with modern techniques, the progress of the evolution of life on Earth.

Explanation:

In Miller's experiment, he subjected a mixture of methane, ammonia, hydrogen, carbon dioxide, nitrogen and water to strong electric shocks and high temperatures. He noted that organic molecules such as glucose, amino acids such as glycine, alanine, glutamic acid and aspartic acid were formed. Subsequently, in 2008 other scientists analyzed these compounds using more sensitive devices. Their analyzes found the formation of 20 amino acids (proteins) and 6 components found in the nucleus of the cells, thus checking the progress of the evolution of life on Earth.

8 0
3 years ago
Less energy was entering Earth's
ololo11 [35]

Answer:

The temperatures on Earth increase

Explanation:

more energy results in more heat.

6 0
3 years ago
Which of the following is not a symbol of an element?<br><br> a. Na<br> b. CO<br> c. S<br> d. He
kvv77 [185]
CO is not an element because CO is a Compound. Elements contain One capital and one lowercase letter. While Compounds contain two or more capital letters.
5 0
3 years ago
Other questions:
  • A sheet of steel 2.5-mm thick has nitrogen atmospheres on both sides at 900°C and is permitted to achieve a steady-state diffusi
    12·1 answer
  • Question 5 Unsaved Which of the following changes can alter the form of a substance but does not necessarily change it to an oth
    8·1 answer
  • Dibenzyl ketone and benzil undergo an aldol condensation in base to make the reactant shown, which then undergoes a second aldol
    6·1 answer
  • 1)Describe the industrial Manufacture of
    12·1 answer
  • solution of silver chloride at constant temperature: AgCl(s) ↔ Ag+(aq) + Cl-(aq) As NaCl(s) is dissolved in the solution, the co
    14·1 answer
  • Why is fair weather common during periods of high pressure?(1 paragraph)
    9·1 answer
  • Please please please help me ill give brainliest
    9·1 answer
  • A sample of an oxide of nitrogen is found to contain 30.4% nitrogen. What is its empirical formula?
    9·1 answer
  • PLS HELP ME
    13·1 answer
  • The energy of the universe is zero and the mass of the earth is also zero. True or false and why. please I need help​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!