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dybincka [34]
1 year ago
14

12.5 g of water are warmed from 12C to 72C. How much energy in J were absorbed? (specific heat of water=4.18 J/gC)

Chemistry
1 answer:
Marta_Voda [28]1 year ago
7 0

Answer

Energy = 3135 J

Explanation

<em>Given:</em>

Mass of water = 12.5 g

Final temperature = 72 C

Initial temperature = 12 C

Specific heat of water = 4.18 J/g C

<em>Required:</em> Energy

Solution

Q = m x Cp x ΔT

where Q is heat absorbed or released

m is the mass

Cp is the specific heat capacity

ΔT = final temperature - initial temperature

Q = 12.5 g x 4.18 J/gC x (72 - 12 C)

Q = 3135 J

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Answer : The products of the acid-base reaction between HClO_3 and LiOH are, LiClO_3 and H_2O

Explanation :

Neutralization reaction : It is a type of chemical reaction in which an acid react with a base to give salt and water as a product that means it reacts to give a neutral solution.  It is also known as acid-base reaction.

The acid-base reaction will be:

HClO_3+LiOH\rightarrow LiClO_3+H_2O

Therefore, the products of the acid-base reaction between HClO_3 and LiOH are, LiClO_3 and H_2O

6 0
4 years ago
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How many moles of gas occupy 56.3 L at 0.899 atm and 20.0°C? ​
zzz [600]

Answer:

n = 2.1 mol

Explanation:

Given data:

Number of moles of gas = ?

Volume of gas = 56.3 L

Pressure of gas = 0.899 atm

Temperature of gas = 20°C (20+273 = 293 k)

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

0.899 atm × 56.3 L  = n × 0.0821 atm.L/ mol.K  × 293 k

50.614 atm.L = n × 24.055 atm.L/ mol

n = 50.614 atm.L / 24.055 atm.L/ mol

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3 0
3 years ago
If it takes 100 N to move a box 5 meters, what is the work done on the box?
JulijaS [17]
<h3>Answer:</h3>

500 Joules

<h3>Explanation:</h3>

<u>We are given;</u>

  • Force is 100 N
  • Distance is 5 m

We are required to calculate the work done;

  1. Work done is the product of force and distance.
  2. That is, work done = Force × distance
  3. Work is measured in Joules

Thus, in this case;

Work done = 100 N × 5 m

                  = 500 Joules

Thus, the work done in moving the box is 500 joules

8 0
4 years ago
Which organelle, labeled X in the diagram, is found in both plant and animal cells? the cell wall the cell membrane mitochondria
arsen [322]

Answer:

it is actually the cell membrane.

Explanation:

the cell wall can only be found in plants

3 0
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