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stiks02 [169]
2 years ago
12

PLEASE HELP !!!

Chemistry
1 answer:
mart [117]2 years ago
4 0

Explanation:

measuring the change of temperature when 2 liquids are mixed

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Cedrick & Astrid titrated a 10.00 mL aliquot of grapefruit juice with a 0.171 M NaOH solution to the end point. They calcula
Strike441 [17]

Answer:

17 mg/ml.

Explanation:

Since NaOH was titrated against Citric acid in the grape fruit, therefore

Converting g to mg,

0.1698 g * 1000 mg/1 g

= 169.8 mg

Volume of grapefruit juice = 10 ml

Mass of Citric acid in ml of juice = 169.8/10

= 17 mg/ml.

5 0
2 years ago
a sample of nitrogen gas occupies 1.55l at 27.0c and 1.00 atm what will the volume be at -100.0c and the same pressure
Alborosie

V₂=0.894 L

<h3>Further explanation</h3>

Given

V₁=1.55 L

T₁=27 + 273 = 300 K

P₁=1 atm

T₂=-100+273 = 173 K

Required

The final volume(V₂)

Solution

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}

Input the value :

V₂=V₁T₂/T₁

V₂=1.55 x 173/300

V₂=0.894 L

6 0
1 year ago
Light energy (in both visible and invisible forms) is a form of _____ energy.
Ainat [17]

Answer:

D: Electromagnetic

Explanation:

Chemical energy is the energy in chemical bonds which is a type of potential energy, eliminating both B and C. While kinetic energy is the energy of motion, photons are a wave/ particle so thinking it would have kinetic energy wouldn't be your fault but light is on the electromagnetic spectrum making D the most likely answer.

7 0
2 years ago
Read 2 more answers
Explain which of the following are correct statements of the Second Law of Thermodynamics and which are not. a. All reversible h
Ivan

Answer:

a. False

b. False

c. True

d. False

Explanation:

The Second Law of Thermodynamics (2LT) has two principal states, one about the heat engines, and other about the entropy.

Heat engines are machines that work by converting heat at work. According to the 2LT, a machine like that can't convert all of the heat in work, some of it must be lost by the surroundings.

Thus, those machines, which is cyclic, can't have an efficiency of 100%, but, depending on the temperature, and the fluid used, it will vary, so, the letter "a" is false.

The engine must be connected to a hot heat reservoir, which will be a high temperature and will warm up the fluid, and to a cold heat reservoir, which will a low temperature and will be the deposit of the heat loss. So, the letter "b" is incorrect, and the letter "c" is correct.

According to the other statement of the 2LT, the entropy, a measure of the randomness, intends to increase in all of the systems, including the universe. So, as more unorganized is a system, as large as the entropy. So, the letter "d" is incorrect.

3 0
2 years ago
14. Which of the following use radio Communication?(Multiple select) *
Anon25 [30]

Answer:

the one that uses radio communication is FM Radio

5 0
2 years ago
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