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ki77a [65]
3 years ago
7

A student is asked to balance an equation by using the half-reaction method. He determines the two half reactions as shown below

.
What should he write as the final, balanced equation?

Chemistry
1 answer:
lina2011 [118]3 years ago
6 0

Answer:

Cl2 + 2Br -> Br2 + 2Cl

Explanation:

There are 2 electrons in each side, so you can substract them and then up with 0 electrons

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The compound tyrosine contains 59.66% C, 6.12% H, 7.73% N, and 26.49% O by mass. What is the empirical formula of tyrosine?
Bezzdna [24]

Answer: C9H11O3N

Explanation:

The percentage by mass of each element is divided by its relative atomic mass. The lowest ratio is now observed. Each ratio is now divided by this lowest ratio and approximated to whole numbers. All these are shown in detail in the image attached.

3 0
3 years ago
How many joules are needed to change the temperate of 22g of water from 18°C to 33°C?
Ira Lisetskai [31]

Answer:

Q =  1379.4 J

Explanation:

Given data:

Mass of water = 22  g

Initial temperature = 18°C

Final temperature = 33°C

Heat absorbed = ?

Solution:

Specific heat capacity:

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

Specific heat capacity of water is 4.18 J/g. °C

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

ΔT = 33°C - 18 °C

ΔT =  15°C

Q = 522 g ×4.18 J/g.°C× 15°C

Q =  1379.4 J

5 0
3 years ago
Two liquids are known to be miscible. They are placed in a beaker and shaken. Which of the following describes what will happen?
Karolina [17]

If they are miscible, they will mix together. They don't necessarily make a new compound. It is sort of like a dilution problem. You can mix say water and antifreeze. You don't get a chemical reaction.

No solidification occurs.

There are no layers.

There is no chemical reaction.

Answer: they will form a solution

7 0
3 years ago
Read 2 more answers
2. Calculate the joules of energy required to heat 454.3g of water<br> frum 5.4°C to 98.6°C.
Tasya [4]

Answer:

176984.38J

Explanation:

E = mC∆T

Where E is the energy in joules

M is the mass of water

C is the specific heat capacity of water =4.184J/g°C

It is known that it will take 4.184J of energy to change the temperature of water by one degree Celsius.

∆T = 98.6°c - 5.4°c

= 93.2°c

∆H = 454.3g × 4.18J/g°C × 93.2°c

= 176984.3768

176984.38J

7 0
4 years ago
Each side of a cube is 42.6mm long. what is the volume of the cube in cm cubed
GarryVolchara [31]
77308.78 is the answer 
3 0
4 years ago
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