Chemistry College

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Answers

Answer 1

Answer:

3. 116.5 V

4. 119.6 V

Explanation:

3. Determination of the voltage.

Resistance (R) = 25 Ω

Current (I) = 4.66 A

Voltage (V) =?

V = IR

V = 4.66 × 25

V = 116.5 V

Thus, the voltage is 116.5 V

4. Determination of the voltage.

Current (I) = 9.80 A

Resistance (R) = 12.2 Ω

Voltage (V) =?

V = IR

V = 9.80 × 12.2

V = 119.6 V

Thus, the voltage is 119.6 V

Related Questions

Hardness is the measure of a mineral's resistance to scratching.

True
False

Answers

Answer:

The answer to the question is true.

the answer is true

What is produced when concentrated aqueous sodium chloride is electrolysed?

Answers

When an electric current is passed through concentrated sodium chloride solution, hydrogen gas forms at the negative electrode , chlorine gas forms at the positive electrode, and a solution of sodium hydroxide also forms. You might have expected sodium metal to be deposited at the negative electrode.

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Which of the following is an example of water in its gas state?
1. A puddle
2. Water vapor
3. A glacier
4. A cloud

Answers

3. Water Vapour!! :)

I have an unknown initial volume of gas
held at a temperature of 115 K in a
container with a pressure of 6 atm. I
increase the temperature to 225 K and
decrease the pressure to 2,800 mmHg
and it causes the final volume of the gas
to be 29 L. What was the initial
volume?

Answers

Answer:

V₁ = 0.025 Liters = 25 ml

Explanation:

P₁ = 6 Atm      P₂ = 7800mm/760mm/Atm = 0.01 Atm

V₁ = ?              V₂ = 29 Liters

T₁ = 115 K        T₂ = 225 K

P₁V₁/T₁ = P₂V₂/T₂ => V₁ = P₂V₂T₁/P₁T₂

V₁ = (0.01 Atm)(29L)(115K)/(6 Atm)(225K) = 0.025 Liters = 25ml

PLZ HELP URGENT!!!!!

Answers

Answer:

A fluke because it is an vertebrae

Explanation:

Help plz now !
Which statement explains why a chemical equation must be balanced?
A. It must show the reactants and products on the correct sides of
the reaction arrow.
B. It must show that the mass of each element involved is conserved
by a chemical reaction.
C. It must show how each chemical formula is written to accurately
represent each substance.
D. It must show that coefficients and subscripts can be used in
chemical formulas.

Answers

Answer: B. It must show that the mass of each element involved is conserved  by a chemical reaction.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The correct statement why a chemical equation must be balanced is It must show that the mass of each element involved is conserved  by a chemical reaction.

Answer:

B. It must show that the mass of each element involved is conserved

by a chemical reaction.

Explanation:

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Which element, when combined with fluorine, would most likely form an
ionic compound?

A. phosphorus
B. lithium
C. carbon
D. chlorine

Answers

The answer is: B. Lithium

help, if anyone knows the correct answer??​

Answers

It’s will not change

help someone i need this

Answers

Wave D, because it’s frequently going up and down. Nonstop.

At what minimum temperature do rocks melt into lava?
A) 3,500 degrees Celsius
B) 6,332 degrees Fahrenheit
C) 800 degrees Fahrenheit
OD 800 degrees Celsius

Answers

The answer is D 800 degrees Celsius

Calculate the percent composition (out of 100) by weight of potassium in potassium carbonate decahydrate.

Answers

Answer:

12.26%

Explanation:

MM K = 39.1 g/mol

MM K2CO3 . 10H2O = 2x39.1 + 12.01 + 3 x 15.99 + 10 x 18.02= 318.38 g/mol

% by weight = (MM K/MM K2CO3.10H2O ) x 100= (39.1/318.8)  x 100=12.26 %

The percent composition by weight of potassium in potassium carbonate decahydrate is 13.98%

Let's represent the chemical formula of the compound as follows;

potassium carbonate decahydrate = CH₂0KO₁₃

The molecular mass of the compound can be calculated as follows:

Molecular mass of  CH₂₀KO₁₃molecular mass = 12 + 20 + 39 + (16×13) = 279 g/mol

mass of potassium = 39 g

Therefore,

% mass of potassium = 39 / 279 × 100

% mass of potassium = 3900 / 279

% mass of potassium = 13.9784946237

% mass of potassium = 13.98 %

learn more on percentage composition here: https://brainly.com/question/3905173

what is a 7 letter word that starts with f: Ancient plants and animals formed into rocks.

Answers

Answer:

Fossils?

Explanation:

Which phrase describes air density?

increases as altitude increases
equals mass divided by volume
pushes molecules in one direction
exerts less pressure as it increases
If you answer I love you

Answers

Answer:B equals mass divided by volume

Explanation:I got hacks :)

Answer:

Which phrase describes air density? well b  

increases as altitude increases

equals mass divided by volume

pushes molecules in one direction

exerts less pressure as it increases

Explanation:

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pls be fr will mark brainliest

Answers

Answer:

1. The two gases making the highest relative contribution to the greenhouse gases are: "CO2 and CH4."

2. The effect of increasing amount of greenhouse gasses is: "All of the above"

3. Which one of the following is a wrong statement?: "Eutrophication is a natural phenomenon in freshwater bodies"

4. The major contributors to the greenhouse gases are: "All of the above"

Explanation:

CO2 is carbon dioxide, and CH4 is methane. Also, the greenhouse gas effect is natural, except, the amount of greenhouse gases is not.

How many sulfur atoms are in 3.7 mol of SO2?

× 10 S atoms

Answers

Answer: 22.3 *10^23 S atoms

Explanation:

Hyenas eat larger mammals like antelope and wildebeest, but will also eat lizards, birds, snakes, and insects. What type of teeth would you expect a hyena to have?​

Answers

Answer:

Large Sharp Teeth

Explanation:

i got a 100 on my test!

Large Sharp Teeth !

i got it right on my quiz

Please help ASAP! Please and thank you have a great and blessed day!,

Answers

the answer is “Mineral”
Yea I confirm that the answer I indeed mineral.

Which part of a calcium atom in the ground state is represented by the dots in its Lewis electron-dot diagram?​

Answers

Answer:

There are two dots are present on the left side of calcium atom which represents the unpaired electrons present in the outermost shell. This structure is presented by Lewis in order to show the number of unpaired electrons in the atom.

Explanation:

how many moles of nitrogen gas are produced in the reaction if we started with 6 moles of ammonium nitrate

Answers

9moIN2 :
The molar ratio between Nitrogen and ammonia is
1
:
3
, therefore, to produce 18 moles of ammonia, we will need

How many molecules are in 13.2 L F2​

Answers

Answer:

3.55 x 10^23 molecules F2

Explanation:

molecules = moles x avogadro number

1 mole of gas occupies 22.4 L

moles of F2 = 13.2/22.4= 0.589 moles

moles F2 = 0.589 x 6.022 x 10^23 = 3.55 x 10^23 molecules F2

which property is a property of water

Answers

Answer: Polarity, Boiling and Freezing Points, Specific Heat Capacity, Density, Surface Tension, Heat of Vaporization and Vapor Pressure, Capillary Action, Solid State (Ice), Liquid State (Liquid Water), Gas State (Steam),  

Explanation:  Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion, and density.

which statement explains this observation?

Answers

Answer:

should be D. Hope this helpsss!

Respiration occurs at the cellular level
truebor false?​

Answers

the answer is : False

just did it

An aqueous solution contains
32.7% KCI (weight weight %)
How many grams of KCl are
contained in 100 g of this solution
Molar Mass
KCE: 74.55 g/mol
H20 18.016 g/mol

Answers

Answer:

32.7

Explanation:

I just did it and got it right

how many atoms are in 4.67 grams of sample of silicon

Answers

2.33 is the right answer.

How many particles are in 9.58 x 1023 of potassium sulfate (K2SO4)? (5.77 x 1047 particles)

Answers

Answer:

[tex]5.77x10^{47}particles.[/tex]

Explanation:

Hello!

In this case, since we are given 9.58x10²³ moles of potassium sulfate, it is possible to compute the particles according to the Avogadro's number:

6.022x10²³

As shown below:

[tex]9.58x10^{23}mol*\frac{6.022x10^{23}}{1mol}\\\\5.77x10^{47}particles.[/tex]

Best regards!

What is the molar mass of H2CO3?
(Molar mass of H = 1.0079 g/mol; C = 12.010 g/mol; O = 15.999 g/mol)

Answers

Answer:

molar mass of H2CO3 = 72.0228

Answer:

62.02 g/mol

Explanation:

Took the test and got it right. if you have enough faith in brainly youll choose the right answer

If 4 moles of sulfur reacts with 9.5 moles of oxygen, how many moles of oxygen would remain after the reaction ?

Answers

4 Na + O₂ = 2 Na₂O

4* 23 g Na --------> 16 g O₂
9.5 g Na ------------> ?

Mass of O₂ = 9.5 * 16 / 4 * 23

Mass = 152 / 92

Mass = 1.6521 g of O₂

Molar mass O₂ = 16.0 g/mol

1 mole O₂ ------------ 16.0 g
? mole O₂ ------------ 1.6521 g

mole O₂ = 1.6521 * 1 / 16.0

≈ 0.10325 moles of O₂

hope that helped!

Please help me with my homework thanks

Answers

Answer:

electrons are transferred from the clouds to the grounf

Explanation:

Answer:

the answer is circle 3 hope it helps

If you have 9.56 moles of aluminum oxide how many moles of sodium oxide could you produce?

Answers

Answer:

The answer is 28.68 moles

Explanation:

Hope this helped Mark BRAINLEST!!!

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