3. Which half-reaction equation represents reduction?

Mark the oxidation nos

Then

Gain of electron is reduction

Copper is reduced .

Option D

Answer:

-22750.5J or -2.28× 10⁴J

Explanation:

q=(75.0g)(4.184J)(27.5°C-100.0°C)

q= -22750.5J

q= -2.28× 10⁴J

Answer:

it is because of the bacteria and different things that go into waters such as ponds, rivers, lakes, seas, oceans, streams, and other body of waters and I should also add the chemicals that go into them as well

Explanation:

Answer:

CONDENSATION When steam is cooled, it releases thermal energy and turns into its liquid state. This process is called condensation.

Explanation:

Propanal and acetone are the IUPAC names for the chemical.

Propanal, commonly known as propanaldehyde, is an aldehyde with one double bond and one oxygen atom.

Acetone is a ketone compound. R2CO is the functional group of ketones.

Thus, Propanal and acetone are the IUPAC names for the chemical.

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⇒ 0.018

-use pH=-log[H3O+]

-solve for H3O+

Answer:

the correct answer is a. the lewis structure represents only the outer energy level

Answer:

The answer would be "Yellow"

Explanation:

Hope this helps!

Answer:

It's the basic unit of an element.

something that makes up everything that has mass

Explanation:

Answer:

soft water can leath with soap whiles hard water cannot be leathers with soap

Answer:

Hard water is water with excess calcium and magnesium, while soft water lacks harsh minerals that can hurt your body.

Explanation:

Also, in hard water, soap is not so effective (little or no foam) and in soft water soap is easily effecive (foams easily).

Answer:

4.5 gm left

Explanation:

45 /15   = 3 half lives     (1/2 )^3 =1/8 th

1/8  * 36 = 4.5 gm

Answer:

3AlCl₃

Explanation:

molar mass of aluminum chloride AlCl₃ is 133.33 g/mole

133.33 times 3 is 400

put 3 in front of AlCl₃

3AlCl₃

https://study.com/academy/lesson/aluminum-chloride-formula-molar-mass-decomposition.htm

Copper is a soft, ductile, and malleable metal that bends and stretches easily without breaking. Copper is a versatile metal for construction and manufacturing because of this.

Answer:

D. has characteristics between conductor and insulator

Answer:

its probably all of the above, if not then it should be the formation of a new liquid, and a color change

Explanation:

Answer:

abt 2 moles

Explanation:

1 mole of carbon atoms per mole of carbon dioxide = 6.02 x 1023 carbon atoms. 2 mole of oxygen atoms per mole of oxygen atoms = 2 x 6.02 x 1023 oxygen atoms.

The heat produced when iron oxide reacts with carbon monoxide is -23.47 kJ/mol.

The standard enthalpy of the reaction is given by the enthalpy of formation of the products and the reactants. The reactants and the products of the reaction are:

Fe₂O₃ (s) + 3CO (g) → 2Fe(s) + 3CO₂ (g)

We know,

The standard enthalpy of formation of iron oxide = −825.50 kJ/mol

The standard enthalpy of formation of carbon monoxide = −110.53 kJ/mol

The standard enthalpy of formation of carbon dioxide = −393.52 kJ/mol

The standard enthalpy of reaction is calculated as:

[tex]\rm \Delta H_{rxn}[/tex] = [2(0) + 3(−393.52)] - [1(-825.50) + 3(-110.53)]

= (0−1180.56+825.50+331.59)

= −23.47 kJ/mol

Therefore, −23.47 kJ/mol is produced.

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Answer:

=71.439911 u

Explanation:

We know that 1 mass of hydrogen atom = 1.00784 u

If it's measured at 72u: 72/1.00784=71.439911 u

Mass of 1 mol hydrogen atoms =1.00784u

Total mass in 72u

Answer:

2fe2o3+3c=4fe+3co2

Explanation:

because 2×2 =4 fe &2×3=6 so we put it like 3co2

Molarity is the ratio of the moles and the volume. The mass of 2.6 M sodium phosphate solution is 2131.22 gms.

Mass is the product of the moles and the molar mass of the substance. It is given as,

Mass = Moles × Molar mass

The moles from molar concentration is used to calculate mass as:

Mass = Molarity × volume × molar mass

= 2.6 × 5.0 × 163.94

= 2131.22 gms

Therefore, 2131.22 gms is the mass of sodium phosphate.

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In order to satisfy charge conservation and lepton number conservation the other products must be neutron.

The principle of conservation of mass states that, the sum of the initial mass of reactants must be equal to final mass of the products.

[tex]_{15}^{30}P\ --- > \ _{14}^{30} Si \ + \ ^{0}_{1} n[/tex]

The balanced reaction of radioactive decay of phosphorous shows conservation of mass.

Thus, in order to satisfy charge conservation and lepton number conservation the other products must be neutron.

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Answer:

n=15 moles H2O

1:2

x:15

x=7.5 moles of O2

Answer:

in illustration 1

the mother told her son not to play with the boy having cough because it is a transferable disease which could cause him also to get sick and would get cough.

while in

illustration 2

the mother let the boy play with the boy having asthma because it is not a transferable disease which wold not affect him or any one else.

Explanation:

this is the reason

#1

#2

Answer:

b

Explanation:

is the dictionary definition of a word.

is the feeling or idea associated with a word.

Answer:

As temperature increases, its solubility increases as well. Notice, however, that it does not increase significantly. In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C

Explanation:

As temperature increases, its solubility increases as well. Notice, however, that it does not increase significantly. In fact, you can expect to be able to dissolve no more than 40 g of sodium chloride per 100 g of water at 80∘C

Answer:

answer

Explanation:

I think it's e hope it right

Yes, at high temperature and pressure (1011 kpa), diamond can change directly (sublime) into gaseous form.

Diamond is a solid form of the carbon element with its atoms arranged in a crystal structure called diamond cubic.

Diamond has some interesting properties, which is written below;

A diamond interacts with oxygen in the air and disappears to form carbon dioxide.

Thus, at high temperature and pressure (1011 kpa), diamond can change directly (sublime) into gaseous form.

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Dust clouds that moved to the east coast of the united states were composed mostly of silt and clay particles due to constant ploughing during drought.

This is defined as dry period in the climate due to insufficient rainfall in the area at a given time.

The drought led to the soil being constantly ploughed thereby loosening and changing the soil type which is susceptible to wind erosion.

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