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What happens when lead nitrate reacts with potassium iodide?

(a) They will not react

(b) Large amount of hydrogen release

(c) Yellow ppt of lead iodide and potassium nitrate will be produced

(d) Evolution of gas will occur
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The chemical reaction will be NaF

Answer:

2Na + F_2

Here Sodium is taken in solid form and Fluorine is taken as gaseus

The reactions are completed as folows;

2NaBr + Ca -----> CaBr2 + Na

2Mg + O2 ----> 2MgO

The electrochemical series has to do with the arrangement of atoms in order of reactivity. The metals that are up in the series are more reactive than the metals that are below.

In this case, the reactions are completed as folows;

2NaBr + Ca -----> CaBr2 + Na

2Mg + O2 ----> 2MgO

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Two blocks of platinum have a temperature of 200 Celsius. Both the blocks have the same amount of thermal energy because both are metals which conducts heat energy throughout their bodies.

Conduction is the process by which heat energy is transmitted between neighboring atoms or molecules. We know that metals are the good conductors of heat and electricity so if one part absorb heat, it will spread to the whole body so we can conclude that the thermal energy will remain the same amount throughout the whole body.

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Answer:

A

Explanation:

2 has 4, 3 and 4 both have 2.

(if 3 had a decimal point it would have 3 sig figs)

The mass measurement contains a total of three significant figures is 22.0 g. Thus option A is correct.

Mass is defined as the inertia, a fundamental feature of all stuff, is quantified.

It is also defined as a dimensionless quantity that represents the mass of a particle or object.

Mass can be expressed as

Mass = density x volume

Significant figure is defined as a number in positional notation is a set of digits that may be relied on to signify the quantity of anything.

It can also be defined as the amount of significant single digits from 0 to 9 in the coefficient of the expression that accurately conveys the meaning.

Thus, the mass measurement contains a total of three significant figures is 22.0 g. Thus option A is correct.

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The maximum mass of anhydrous zinc chloride that could be obtained from the products of the reaction is 8.18 g

From the question, we are to determine the maximum mass of anhydrous zinc chloride that could be obtained

From the given balanced chemical equation,

ZnO + 2HCl → ZnCl₂ + H₂O

This means 1 mole of ZnO will completely react with 2 moles of HCl to produce 1 mole of ZnCl₂ and 1 mole of H₂O

From the given information

Number of moles of ZnO = 0.0830 mole

Now, we will calculate the number of moles of HCl that is present

Volume of HCl added = 100 cm³ = 0.1 dm³

Concentration of the HCl = 1.20 mol/dm³

Using the formula,

Number of moles = Concentration × Volume

Number of moles of HCl present = 1.20 × 0.1 = 0.120 mole

Since

1 mole of ZnO will completely react with 2 moles of HCl to produce 1 mole of ZnCl₂

Then,

0.06 mole of ZnO will react with the 0.120 mole of HCl to produce 0.06 mole of ZnCl₂

Therefore, maximum number of moles of anhydrous zinc chloride that could be produced is 0.06 mole

Now, for the maximum mass that could be produced

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of ZnCl₂ = 136.286 g/mol

Then,

Mass = 0.06 × 136.286

Mass = 8.17716 g

Mass ≅ 8.18 g

Hence, the maximum mass of anhydrous zinc chloride that could be obtained from the products of the reaction is 8.18 g

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During a chemical reaction, the quantity of heat can only be added or removed in aim to maintain all of the components involved at almost the same temperature. It can be described by Hess's law.

The total enthalpy change for a reaction is the sum of all changes, according to Hess's Law of Constant Heat Summation. The fact that enthalpy is just a state function is demonstrated by this law.

Hess's law can be expressed as:

Δ[tex]H_{reaction}[/tex] = ∑nΔ[tex]H_{product}[/tex] - ∑nΔ[tex]H_{reactant}[/tex].

where, n indicates stoichiometric coefficients, ΔH indicates enthalpy of reaction( reactant and product)

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Answer: 176.18 kJ/mol

Explanation:

Answer:

awnser is true took the test

Explanation:

i took the test

Answer:A-density and B-mass is the answer.

Explanation:

Answer:

1.) Density

2.) Mass

Explanation:

Claim 2 is correct as during the chemical reaction, the rust and another substance were produced.

This is defined as two or more substances being converted to new substances known as products.

The reaction between iron pipes and the fertilizer will lead to the formation of products such as rust and another substance. The people of Westfield may likely have compounds such as Sodium nitrite in their water.

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Answer:

c.

Explanation:

Answer:

In displacement reactions

Explanation:

Answer:b

Explanation:

Both devices work because of electromagnetic induction, which is when a voltage is induced by a changing magnetic field.

Answer:

A

and B

Explanation: hope this helps, pls mark brainliest.

The mass of propane, C₃H₈ that will vaporise as a result of absorbing 100 KJ of energy is 280.25 g

1 mole of propane C₃H₈ = (3×12) + (1×8) = 44 g

From the question given above,

15.7 KJ of heat energy vaporised 44 g of propane.

Therefore,

100 KJ of heat energy will vaporise = (100 × 44) / 15.7 = 280.25 g of propane

Thus, 280.25 g of propane were vaporised from the tank.

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Answer:

D

Explanation:

The temperature increases

Answer:

Explanation : Ethanoic acid has the lowest vapor pressure i.e 0.08 atm at the temperature of 50°C compared to the other given options

Explanation:

Answer:

V2 = 2.79

Explanation:

T1 = 15C = 288.15K

P1 = 1 atm

V1 = 2.58L

T2 = 38C = 311.15K

P2 = 1 atm

V2 = ?

311.15 x 1 x 2.58 ÷ 288.15 ÷ 1 = V2

V2 = 2.79 L

So 2.79 L is the answer!!

The net ionic equation for potassium fluoride and ammonium chloride is

NH_4^++F^-(aq)--->NH_3(aq)+HF(aq)

Generally, The net ionic equation can simply be defined as a chemical equation that records solely those species experiencing the reaction.

Therefore,  net ionic equation for potassium fluoride and ammonium chloride

NH_4Cl(aq) and KF(aq) are both salys

Therefore, the ionic equation excludes them and is

NH_4^++F^-(aq)--->NH_3(aq)+HF(aq)

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Answer:

15

Explanation:

Answer:

D. a nonpolar covalent bond

Answer:

D a nonpolar covalent bond

Explanation:

edge 2020

Answer:

17.8 grams

Explanation:

The mass of  Na₂SO₄ produced is 35.5g

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Mass of NaOH = 10 g

Molar mass of NaOH = 23 + 16 + 1 = 40

Molar mass of NaSO = (23 × 2) + 32 + (4 × 16) = 142

                      Moles = mass ÷ molar mass

moles of NaOH = 10 ÷ 40

                           = 0.25

From the reaction, 1 mole of NaOH gives 1 mole of Na₂SO₄.

Thus, 0.25 moles of NaOH gives 0.25 moles of Na₂SO₄.

Mass of Na₂SO₄.  = 0.25 × 142

                              =35.5g

Therefore, the mass of  Na₂SO₄ produced is 35.5g

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Answer:

a and d but were in America so d

Answer:

D. Ester

Polyesters are defined as (snooze alert!) long-chain polymers chemically composed of at least 85 percent by weight of an ester and a di-hydric alcohol and a terephthalic acid. The term refers to many (poly) esters (the building block compound—many fats and fragrances are esters).

Manufactured cellulose fibers come from plants that are processed into a pulp and then extruded in the same ways that synthetic fibers like polyester or nylon are made. Rayon or viscose is one of the most common "manufactured" cellulose fibers, and it can be made from wood pulp.

Answer:

carbon dioxide nd water

Explanation:

mark brainliest

Answer:

B.

Explanation:

An ammonia solution contains only a few ions, and it conducts electricity only poorly.

Answer:

[tex]1.90[/tex] [tex]moles[/tex]

Glycerol is the three-carbon backbone of triglycerides, while fatty acids are longer chains of carbon molecules attached to the glycerol backbone.

The best way to represent the concentration of a 1.75 m K₂CrO₄ solution is [K₂CrO₄] = 1.75M.

Concentration of any substance will give idea about the quantity of that substance present in given volume.

Concentration will be express in many ways like molarity, molality, mole fraction and so on. And to express the quantity in concentration we will use the big square closed bracket like this [ ].

Hence, best way is [K₂CrO₄] = 1.75M.

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Answer:

B.

Explanation:

Answer:

c. 640.51

Explanation:

Given: 2.54 cm = 1 inch weighed 3.88 ounces

1 g = 0.035273 ounces

?   = 3.88 ounces

? = (3.88 x 1) / 0.035273

? = 109.999 = 110 g

110 g = 3.88 ounces

2.54 cm = 110 g

14.79 cm = ?

? = (14.79 x 110) / 2.54

? = 640.51 g

According to unit conversion, there are 640.51 g would a 14.79 cm length of same iron rod weigh.

Unit conversion is defined as a multi-step process which involves multiplication or a division operation by a numerical factor.The process of unit conversion requires selection of appropriate number of significant figures and the rounding off procedure.

It involves a conversion factor which is an expression for expressing the relationship between the two units.A conversion ratio always has value which equals to one which indicates that numerator and denominator have values which are expressed in different units.

Given: 2.54 cm = 1 inch weighed 3.88 ounces,1 g = 0.035273 ounces

x  = 3.88 ounces

x= (3.88 x 1) / 0.035273

x = 109.999 = 110 g

110 g = 3.88 ounces

Thus,2.54 cm = 110 g

14.79 cm = x

x= (14.79 x 110) / 2.54

x = 640.51 g

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