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
Marrrta [24]
3 years ago
5

A 4.000 g sample of iron was heated from 0.0°C to 21.0°C. If it has a specific heat of 0.440 kJ/kg °C, how many kilojoules of he

at does it absorb?
Chemistry
1 answer:
Mashutka [201]3 years ago
6 0
M = 4 g = 4/1000 kg = 0.004 kg, θ₂ = 21.0°C, θ₁ = 0°C , c = 0.44kJ/kg°C,

Q = mc(θ₂ - θ₁)

Q = 0.004*0.440*(21 - 0)

Q  =  0.03696 kJ 

0.03696 kJ<span> of heat is absorbed.</span>
You might be interested in
Can someone help me out plz
rosijanka [135]

Answer:

#2 you multiply the numbers

Explanation:

5 0
3 years ago
. How many moles of ammonia gas, NH3, are required to fill a volume of 50 liters at STP?
murzikaleks [220]
In STP every 22.4 litters is 1 mol
6 0
3 years ago
Read 2 more answers
The average propane cylinder for a residential grill holds approximately 18 kg of propane. How much energy (in kJ) is released b
brilliants [131]
Combustion is a chemical reaction between a fuel and an oxidant, oxygen, to give off combustion products and heat. Complete combustion results when all of the fuel is consumed to form carbon dioxide and water, as in the case of a hydrocarbon fuel. Incomplete combustion results when insufficient oxygen reacts with the fuel, forming soot and carbon monoxide. 

The complete combustion of propane proceeds through the following reaction:
C_{3} H_{8} + 5O_{2} --> 3CO_{2} + 4H_{2}O

Combustion is an exothermic reaction, which means that it gives off heat as the reaction proceeds. For the complete combustion of propane, the heat of combustion is (-)2220 kJ/mole, where the minus sign indicates that the reaction is exothermic. 

The molar mass of propane is 44.1 grams/mole. Using this value, the number of moles propane to be burned can be determined from the mass of propane given. Afterwards, this number of moles is multiplied by the heat of combustion to give the total heat produced from the reaction of the given mass of propane.

 14.50 kg propane  x <u> 1000 g </u> x <u>  1 mole propane   </u>  x <u>  2220 kJ  </u>   
                                     1 kg              44.1 g                     1 mole

= 729,931.97 kJ
8 0
2 years ago
The measurement 1.00540 g contains<br> significant figures. *<br> 10<br> 3<br> 4<br> 5<br> O<br> 6
antiseptic1488 [7]
It contains 6 sig figs
4 0
3 years ago
Which comparison accurately states why phylogenetic trees based on molecular data can be more informative than those based on mo
Romashka [77]


Molecular data is more informative than morphology because this examines the DNA sequence and protein composition. This then provide a more comprehensive detail on what species are more related and distant with one another. .  
Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
6 0
3 years ago
Other questions:
  • What trend do you note for the atomic radii of the third period?
    13·2 answers
  • When 2-methylpropane is treated with bromine in the presence of UV light, one product predominates a. Identify the structure of
    8·1 answer
  • The pressure in a car tire is 198 kPa at 27°C. After a long drive, the pressure
    12·1 answer
  • Name the phase change:
    7·1 answer
  • Why boron trifluoride is nonpolar and sulphur dioxide is polar
    5·1 answer
  • For the following reaction, 4.77 grams of carbon (graphite) are allowed to react with 16.4 grams of oxygen gas.
    14·1 answer
  • What evidence can be used to explain the type of mutualistic relationship present between the water buffalo and frog?
    14·1 answer
  • Which transfer of heat is depicted in the figure?
    7·1 answer
  • Which of the following is created when solids, liquids, or gases mix together with one another?
    15·1 answer
  • When you see or visit grasslands, what do you know about the climate? (Select all that apply.)
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!