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8090 [49]
3 years ago
5

In which situation is an object accelerating?

Chemistry
1 answer:
Nady [450]3 years ago
3 0
I would say D, because the object's speed moves up, therefore accelerating. 
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Many types of scientific equipment are used to perform different functions in the science lab. Which of the following combinatio
alisha [4.7K]

The scientific instruments used to heat water to 85 degree Celsius has been graduated cylinder, beaker, thermometer, and hot plate. Thus, option B is correct.

Scientific equipments have been defined as the instruments and glassware that has been used in the scientific study and experimentation.

<h3>Equipments for heating the water</h3>

The water has been heated to the temperature of 85 degrees Celsius. The temperature has to be monitored thus, a thermometer has been used.

The water has been measured to be 1 L, thus the graduated cylinder, and beaker has been used for the measurement and heating of water.

The heat has been provided to the beaker by placing it on a hot plate.

Thus, the scientific instruments used to heat water to 85 degree Celsius has been graduated cylinder, beaker, thermometer, and hot plate. Thus, option B is correct.

Learn more about scientific equipments, here:

brainly.com/question/24690874

3 0
2 years ago
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Compute the equilibrium constant,K, at 25 ∘C for the reaction between Ni2+(aq) and Zn(s), which form Ni(s) and Zn2+(aq)
ANEK [815]

Answer:

The answer to the question is;

The equilibrium constant,K, at 25 °C for the reaction between Ni²⁺(aq) and Zn(s), which form Ni(s) and Zn²⁺ is 2.04×10¹⁷.

Explanation:

The half reactions are as follows

Ni²⁺ (aq) + 2e⁻ -> Ni (s)

Zn (s) -> Zn²⁺ (aq) + 2e⁻

For the Ni²⁺/Ni system we have the potential given as -0.23V (Reduction)

For the Zn²⁺/Zn sytem, the potential is -0.76. Here however, we should note that the zinc is being oxidized and therefore the potential is positive, that is;

Zn/Zn²⁺ = 0.76

Therefore the voltage for the sum of the reactions on both sides of the process is

-0.23 V + 0.76 V = 0.53 V    

We then call upon the Nernst equation to calculate the equilibrium constant as follows

E⁰_{cell} = \frac{0.0592}{n} logK

Where:

E⁰_{cell} = Standard cell potential = 0.53 V

n = Number of moles of electrons = 2 moles of e⁻

K = Equilibrium constant

Therefore we have

0.53 V = \frac{0.0592}{2} logK

Therefore log K = 17.905

and K =   10^{17.9054} = 2.04×10¹⁷.

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3 years ago
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A proton has a charge that is opposite the charge of
emmainna [20.7K]
An electron

proton=positive charge
electron=negative charge
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3 years ago
Is evaporation/condensation a physical or chemical change? Explain
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Physical change because it still has the same chemical formula
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O=O is not a compound; it's a molecule.

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