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Anton [14]
2 years ago
10

How old was this tree when it was cut down?

Chemistry
1 answer:
son4ous [18]2 years ago
5 0
Do you have more information than this
Is it a story?
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A stock solution of ammonia in water is 28 wt% NH3. The Formal Weight (FW) of NH3 is 17.03 g/mol). The solution density at room
weqwewe [10]

Answer:

[NH₃] = 14.7 mol/L

Explanation:

28 wt% is a type of concentration that indicates that 28 g of ammonia is contained in 100 g of solution.

Let's determine the amount of ammonia:

28 g . 1 mol / 17.03g = 1.64 moles of NH₃

You need to consider that, when you have density's data it is always referred to solution:

Mass of solution is 100 g, let's find out the volume

0.90 g/mL = 100 g /V

V = 100 g / 0.90mL/g → 111.1 mL

We convert the volume to L → 111.1 mL . 1 L/1000mL = 0.1111 L

mol/L = 1.64 mol/0.1111L → 14.7 M

mol/L = M → molarity a sort of concentration that indicates the moles of solute in 1L of solution

4 0
2 years ago
The first law of thermodynamics states that . How is this also a statement of the principle of conservation of energy?
Eddi Din [679]

The answer is a change in internal energy causes work to be done and heat to flow into the system.  

<u>Explanation:</u>

  • The first law of thermodynamics is a similar version of the law of conservation of energy where the energy can neither be created nor be destroyed, it can be transformed from one form to the other.
  • It also defines that the work is done and heat flowing into the system is due to the change in internal energy. The sum of all energy including kinetic and potential energy except the displaced energy to the surrounding is known as internal energy.
  • ΔU represents the change in internal energy of the system, Q represents the net heat transferred into the system, and W represents the net work done by the system. So +ve Q adds energy to the system and =ve W takes energy from the system. Thus ΔU=Q−W.

8 0
3 years ago
Read 2 more answers
The substance which does the dissolving in a solution is
oksano4ka [1.4K]

Answer:

solvents dissolve in liquids

6 0
3 years ago
Which of the following elements has the highest ionization energy?
Sliva [168]

Answer:

C

It is Neon

:DDDDDDDDDDDDDDDD

Explanation:

MY BRAIN :D

6 0
3 years ago
A colligative property is when the addition of a solute to a solvent alters the boiling point or The freezing point of a solvent
Mrrafil [7]

Answer:

this cp, is probably vapor pressure.

4 0
3 years ago
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