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
topjm [15]
3 years ago
7

Given 13.5 grams of substance Z, if the substance absorbs 36 kilojoules of energy and the temperature increases by 25 degrees Ce

lsius, what is the specific heat of the substance? 1.07 x 102 J/g·°C 1.22 x 104 J/g·°C 1.07 x 10-1 J/g·°C 1.22 x 107 J/g·°C
Chemistry
1 answer:
kirza4 [7]3 years ago
3 0

Answer:

1.07 ×10² j/g.°C

Explanation:

Given data:

Mass of substance Z = 13.5 g

Amount of heat absorbed = 36 Kj (36×1000 = 36000 j)

Increase in temperature= ΔT  = 25°C

Specific heat of substance = ?

Solution:

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

Now we will put the values in formula.

Q = m.c. ΔT

36000 j = 13.5 g ×c×25°C

36000 j / 13.5 g×25°C = c

c = 36000 j /337.5 g.°C

c = 1.07 ×10² j/g.°C

You might be interested in
Write the electron configuration of the element that has Z = 3 *
Natasha2012 [34]

Answer:

1s²2s^1

Explanation:

Lithium Z = 3

8 0
3 years ago
Octane (C8H18)reacts oxygen gas (O2) to form carbon dioxide and water
iren [92.7K]

Answer:

i believe this is true

Explanation:

5 0
3 years ago
Give three examples of energy being changed to other forms.
dimaraw [331]
Solar: rays from the sun shine on solar pannels creating energy which is a renewable energy.
Water: water stored at a dam flows through turbines creating energy which is a renewable energy
Fossil fuels: fossil fuels are extracted from the ground the burned to create energy and this is a nonrenewable resource.
Hope this helps :)
6 0
3 years ago
The mass number for an atom is numerically equal to which quantity
Misha Larkins [42]

Answer:

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.

Explanation:

protons

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

4 0
3 years ago
What is the concentration of no3- ions in a solution prepared by dissolving 15.0 g of ca(no3)2 in enough water to produce 300. m
r-ruslan [8.4K]

Ca(NO3)2 -------> Ca²⁺ +2NO3⁻

M(Ca(NO3)2)= M(Ca) + M(N) + 6M(O)= 40.0 +14.0 +6*16.0 = 150 g/mol

15.0 g Ca(NO3)2 * 1mol/150 g = 0. 100 mol Ca(NO3)2


Ca(NO3)2 -------> Ca²⁺ +2NO3⁻
1 mol                               2 mol
0.100 mol                           0.200 mol

We have 0.2 mol NO3⁻ in 300. mL=0.300 L of solution,
so
0.200 mol NO3⁻ / 0.300 L solution ≈ 0.667 mol NO3⁻ /L solution = 0.667 M

Concentration of NO3⁻ is 0.667 M.



4 0
3 years ago
Other questions:
  • A solution is made by dissolving 4.35 g of glucose (C6H1206) in 25.0 mL of water at 25 °C.Calculate the molality of glucose in t
    9·1 answer
  • Of the following, which can be used to identify an element present in a sample?
    11·1 answer
  • The vitamin A molecule has the formula C20H30O, and a molecule of vitamin A2 has the formula C20H28O. Deter- mine how many moles
    13·1 answer
  • Why does chromium have a 3 charge? why is chromium (vi) oxide [cro3} not chromium 3 oxide?
    12·1 answer
  • We know that the law of conservation of energy states that energy can not be created or destroyed. It only changes form. Conside
    11·2 answers
  • Lab: Environmental Changes in a Watershed<br> Lab Report Essay please!:)
    6·1 answer
  • What process is represented by the letter on the diagram?
    15·1 answer
  • Explain, in your own words, what volumic mass is?
    6·1 answer
  • A coefficient is a number listed before a compound or atom, telling how many of the compounds are needed so that the Law of Cons
    7·1 answer
  • Balance FeCl3 + MgO ---&gt; Fe2O3 + MgCl2
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!