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
Diano4ka-milaya [45]
3 years ago
7

Plz help me.......

Chemistry
1 answer:
tatyana61 [14]3 years ago
4 0
I think it’s 4 ........
You might be interested in
What is Q= mc delta t
Mariulka [41]

Answer:

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

The substances with higher value of specific heat capacity require more heat to raise the temperature by one degree as compared the substances having low value of specific heat capacity.For example,

The specific heat capacity of oil is 1.57 j/g. K and for water is 4.18 j/g.K. So, water take a time to increase its temperature by one degree by absorbing more heat while oil will heat up faster by absorbing less amount of heat.

Consider that both oil and water have same mass of 5g and change in temperature is 15 K. Thus amount of heat thy absorbed to raise the temperature is,

For oil:

Q = m.c. ΔT

Q = 5 g× 1.67 j/g K × 15 K

Q = 125.25 j

For water:

Q = m.c. ΔT

Q = 5 g× 4.18 j/g K × 15 K

Q = 313.5 j

we can observe that water require more heat which is 313.5 j to increase its temperature.

6 0
3 years ago
Earth’s mantle is a _____.
liubo4ka [24]
A layer of hot liquid rock
8 0
3 years ago
Read 2 more answers
What is the concentration of a phosphoric acid solution of a 25.00 mL sample if the acid requires 42.24 mL of 0.135 M NaOH for n
kaheart [24]
0.0760 m

do this by:

finding the moles of NaOH which will be <span>5.702 E -3 m
</span>
next find the moles of H3PO4 which will be <span>1.90 E -3 m</span><span>
calulcate </span>25 ml sample molarity = 0.07603 m, just put 0.0760<span>

</span>
8 0
3 years ago
Read 2 more answers
If 10.7 grams of NH4Cl is dissolved in enough water to make 800 mL of solution,what will be it's molarity
olga nikolaevna [1]
<h3><u>Answer;</u></h3>

Molarity = 0.25 M

<h3><u>Explanation;</u></h3>

Molarity is given by moles/Liter.

First we find moles:

Number of moles = Mass /molar mass

= (10.7g NH4Cl)/(53.5g/mol NH4Cl)

= 0.200 moles NH4Cl  

Then  we convert to liters:

= (800mL)*(1L/1000mL) = 0.800L  

Therefore; molarity = 0.2moles/0.8L

                                = 0.25M

6 0
3 years ago
What is used to measure heat?
castortr0y [4]

Answer:

O constant specific heat

Explanation:

3 0
3 years ago
Other questions:
  • Which of the following is not a fossil fuel?<br><br> Natural Gas<br> Petroleum<br> Nitrogen<br> Coal
    11·2 answers
  • WILL MARK BRAINIEST
    11·2 answers
  • If 2g of an isotope has a half life of 7days,the half life of 1g of sample will be?
    12·1 answer
  • Please help me quickly with all questions!
    13·2 answers
  • What is the number of moles of 25.0 grams of molecules of SO and NO? How to compare and contrast?
    8·1 answer
  • When gas molecules collide with other gas molecules or the walls of a container, does it affect their speed?
    15·1 answer
  • What effect has impurities on the melting and boiling points of pure substances? illustrate your answer with an example
    11·1 answer
  • Number of molecules in 16 grams of h2co3
    8·2 answers
  • What is past form of be<br>​
    10·2 answers
  • An object has a mass of 40 grams and a volume of 20 ml. What is the object's density?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!