_Fe(CN)2+ _HI-> ___Fel2 + _HCN

Answer:

4

Explanation:

your chosen answer is right as unsaturated mean contains double bond and 1st and 3rd is Wrong as Carbon only can have 4 bonds and 2nd is Wrong as it is saturated.

hope this helps :)

Answer:

Which index fossil in sedimentary surface bedrock most likely indicates that a marine environment once existed in the region where the sediments were deposited? The timeline below represents the entire geologic history of Earth. The lettered dots on the timeline represent events in Earth's history.

Explanation:

Plz mark me as a brainlist

Answer: The chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]

Explanation:

An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).

The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.

Element X has the atomic number 11 which is sodium. The electronic configuration of it is [tex]1s^22s^22p^63s^1[/tex]

This element will lose 1 electron to form [tex]X^+[/tex] ion of [tex]Na^+[/tex]

Chlorine has the atomic number 17. The electronic configuration of it is [tex]1s^22s^22p^63s^23p^5[/tex]

This element will gain 1 electron to form [tex]Cl^-[/tex] ion

When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of [tex]XCl[/tex] or [tex]NaCl[/tex]

Hence, the chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]

Answer:

"soot" or "smoke" or "particulates" or "ash" or "carbon particulates"

Explanation:

The carbon that does not undergo combustion is released as particles. This  particles are called soot or dust. Incomplete combustion also leads to the production carbon monoxide.

Combustion is an exothermic process in which a gas reacts with the atmospheric oxygen producing carbon dioxide and water. This reaction involves heat to the surroundings.

Sometimes the combustion does not occurs completely. When there is insufficient oxygen for the fuel to completely react with the air to form carbon dioxide and water leads to  incomplete combustion. It also occurs when a heat sink, such a solid surface or flame trap, extinguishes the combustion.

One of the byproducts of incomplete combustion is carbon monoxide. The typical incomplete combustion process releases carbon, which results in the formation of soot and dust.

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Answer:

to get a job and why does she not have money

Explanation:

Have a nice day :)

Answer:

V=0.3×22.4=6.72 liters hope this helps

Answer:

hi

Explanation:

Answer:

I and III only

Explanation:

Ammonium carbonate is soluble in water

Barium sulphate is not soluble in water

Lead nitrate is soluble in water

Answer:

D. It tells how long it takes for a radioactive isotope to become a daughter element

Explanation:

The other answer was wrong

Option B. It describes what fraction of radioisotope exists present after each half-life has passed is the information does the half-life of a radioisotope give.

Radioisotopes exist as radioactive isotopes of an element. They can also be described as atoms that contain an unstable assortment of neutrons and protons, or surplus energy in their nucleus.

A radionuclide exists as a nuclide that has surplus nuclear energy, creating it unstable. This excess energy can be utilized in one of three methods: emitted from the nucleus as gamma radiation; transferred to one of its electrons to release it as a transformation electron; or used to produce and emit a new particle from the nucleus.

Radioactive half-life exists the time needed for a quantity of a radioisotope to decay by half. If the half-life of an isotope exists relatively short, e.g. a few hours, most of the radioactivity will be gone in a rare day.

Hence, Option B. It describes what fraction of radioisotope exists present after each half-life has passed is the information does the half-life of a radioisotope give.

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Answer:

170.362 L

General Formulas and Concepts:

Atomic Structure

Gas Laws

Stoichiometry

Explanation:

Step 1: Define

Identify variables

[Given] 106.476 g N

[Solve] L N

Step 2: Identify Conversions

[STP] 1 mol = 22.4 L

[PT] Molar Mass of N: 14.01 g/mol

Step 3: Convert

Answer:

when u press the brakes

Explanation:

the newton third law of motion is applied on tyres

Answer:

NEWTONS SECOND LAW,

both vehicles have the same speed, but the truck has a larger mass than the car,

so according to F=mass× acceleration

the truck driver has to apply much force than the car driver

Answer:

35.9%

Explanation:

The percent volume of the coffee solution can be calculated as follows:

% volume of coffee solution = volume of coffee/total volume of coffee solution × 100

According to this question, a cup of coffee has 71 mL of coffee and 127 mL of water. This means that, the total volume of coffee solution is;

71mL + 127mL = 198mL

% volume = 71/198 × 100

= 0.359 × 100

Percent volume of coffee solution = 35.9%

Answer:

The pOH of the solution is 11.23.

Explanation:

To solve this problem, we must remember the following formula for pH: pH = -log[H+].

If we plug in the value we are given, we can find the pH.

pH = -log[H+]

pH = -log(1.7*10^-3)

pH = 2.77

To find the pOH, we use the following formula:

pH + pOH = 14

To solve, we should plug in the value we found above for pH and solve for the pOH.

2.77 + pOH = 14

pOH = 11.23

Therefore, the correct answer is 11.23.

Hope this helps!

Answer:

0.017 M

Explanation:

The reaction that takes place is:

First we calculate how many KOH moles reacted, using the given volume and concentration:

As 1 mmol of KOH reacts completely with 1 mmol of HNO₃, in 14.9 mL of the HNO₃ solution there were 0.255 HNO₃ mmoles.

With that in mind we can calculate the concentration of the HNO₃ solution using the calculated number of moles and given volume:

Answer:

The combination of the polymer opening up and the water molecules sticking to it make a solution of the hydrogel get thicker and more viscous (sticky). Disposable nappies make use of the ability of hydrogels to take up and retain water, even under pressure.

Explanation:

Answer:d

Explanation:

obv

Answer:

b. Li

Explanation:

A reducing agent is a substance in a redox reaction that reduces another substance, but gets oxidized itself. It becomes oxidized by donating electrons to another substance, which accepts it and gets reduced.

According to the given equation in this question:

Cu2+ + 2 Li → Cu + 2Li+

In the above equation, lithium (Li) which was at an oxidation state of O in the reactant side has become oxidized in the product side i.e. Li → Li+. This means that lithium is the reducing agent.

Answer:

For a: The frequency produced by loudspeaker A is 200 Hz

For b: Loudspeaker B produces a higher frequency of vibrations.

Explanation:

To calculate the frequency of a loudspeaker, we use the formula:

[tex]\nu=\frac{\text{Number of vibrations}}{\text{Time period}}[/tex]          ......(1)

where,

[tex]\nu[/tex] = frequency

Number of vibrations = 200

Time period =  1 second

Putting values in equation 1:

[tex]\nu_A=\frac{200}{1s}=200Hz[/tex]

Number of vibrations = 400

Time period =  1 second

Putting values in equation 1:

[tex]\nu_B=\frac{400}{1s}=400Hz[/tex]

Hence, the frequency produced by loudspeaker A is 200 Hz and loudspeaker B produces a higher frequency of vibrations.

Answer:

1. 78.9g of CO

2. 104.9g Fe and 124.0g CO2

Explanation:

Based on the balanced reaction:

Fe2O3 (s) + 3CO (g) -> 2Fe(s) + 3CO2 (g)

1 mole of Fe2O3 reacts with 3 moles of CO to produce 2 moles of Fe and 3 of CO2

1. The moles of 0.150kg = 150g of Fe2O3 -Molar mass: are:

150g * (1mol / 159.69g) = 0.9393 moles Fe2O3

Moles CO:

0.9393 moles Fe2O3 * (3mol CO / 1mol Fe2O3) = 2.818 moles CO

Mass CO -Molar mass: 28.01g/mol-:

2.818 moles CO * (28.01g/mol) = 78.9g of CO

2. The moles of Fe produced are:

0.9393 moles Fe2O3 * (2mol Fe / 1mol Fe2O3) = 1.8786 moles Fe

Mass Fe -Molar mass: 55.845g/mol-:

1.8786 moles Fe * (55.845g/mol) = 104.9g Fe

The moles of CO2 produced are:

0.9393 moles Fe2O3 * (3mol CO2 / 1mol Fe2O3) = 2.818moles CO2

Mass CO2 -Molar mass: 44.01g/mol-:

2.818moles CO2 * (44.01g/mol) = 124.0g CO2

Answer:

here, i think this helps

https://www.crestwoodschools.org/userfiles/867/Classes/9260/Moles%20Worksheet.pdf

Answer:

A

Explanation:

because they are non polar so would not conduct electricity :)

The type of bonding does the compound have non polar covalent.

A non-polar covalent bond is just a sort of chemical bond that occurs when two atoms share electrons evenly. As a result, the count of electrons shared by neighboring atoms in an atom would be identical.

A compound would be a material made up of two or maybe more chemical elements that have been chemically bonded together.

They still wouldn't conduct electricity even though they can non-polar.

Therefore, the correct answer will be option (A).

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Answer:

308.2 g of NH₃.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

3H₂ + N₂ —> 2NH₃

Next, we shall determine the mass of N₂ that reacted and the mass of NH₃ produced from the balanced equation. This can be obtained as follow:

Molar mass of N₂ = 2 × 14 = 28 g/mol

Mass of N₂ from the balanced equation = 1 × 28 = 28 g

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3 = 17 g/mol

Mass of NH₃ from the balanced equation = 2 × 17 = 34 g

Summary:

From the balanced equation above,

28 g of N₂ reacted to produce 34 g of NH₃.

Finally, we shall determine the mass of NH₃ produced by the reaction of 253.8 g of N₂. This can be obtained as illustrated below:

From the balanced equation above,

28 g of N₂ reacted to produce 34 g of NH₃.

Therefore, 253.8 g of N₂ will react to produce = (253.8 × 34)/28 = 308.2 g of NH₃.

Thus, 308.2 g of NH₃ were obtained from the reaction.

Answer:

Water molecules forming hydration shells around Na+ and Cl- ions. The partially positive ends of the water molecules are attracted to the negative Cl- ion, while the partially negative ends of the water molecules are attracted to the positive Na+ ion.

Explanation:

I got this from another source, I hope this helps tho!

Answer:

52 mL of H₂O.

Explanation:

The balanced equation for the reaction is given below:

2H₂ + O₂ —> 2H₂O

From the balanced equation above,

2 mL of H₂ reacted with 1 mL of O₂ to produce 2 mL of H₂O.

Finally, we shall determine the volume of H₂O that will be produced by the reaction of 52 mL of H₂ at the same temperature and pressure.

This can be obtained as follow:

From the balanced equation above,

2 mL of H₂ reacted to produce 2 mL of H₂O.

Therefore, 52 mL of H₂ will also react to produce 52 mL of H₂O.

Thus, 52 mL of H₂O were obtained from the reaction.

Answer:

C + 2H2 = CH4

Given 30.2g of H2

Find the Moles

Mole =Mass/Molar Mass

Molar Mass of H2 = 1x2 = 2g/mol

Mole = 30.2/2

= 15.1moles of Hydrogen gas.

Now from the balanced equation of Reaction above...

1mole of Carbon reacts completely with 2moles of Hydrogen gas.

"x" moles of carbon with react with 15.1moles of Hydrogen

x = 15.1/2

=7.55moles of carbon.

We now have moles of carbon.

To find mass

Mole =Mass/Molar Mass

Mass = Mole x Molar Mass

Molar mass of carbon = 12g/mol

Mass = 7.55 x 12

Mass = 90.6g of carbon is needed.

Answer:

c

Explanation:

Answer:
B: They must be cooler than the air inside the house.

Explanation:

I got it right on edge!

Answer:

Yes, because the water solvent is better

Explanation:

Hope this helps