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3 years ago

Predict the following reaction Kl+Pb(NO3)2->?

Chemistry

1 answer:

Nonamiya [84]3 years ago

6 0

Answer:

The answer to your question is KNO₃ + PbI₂

Explanation:

Data

Chemical reaction

KI + Pb(NO₃)₂ ⇒

Process

We know that this is a double displacement reaction because there are two reactants and each reactant has a cation and an anion (a positive atom and a negative atom or a polyatomic molecule).

To know the products just interchange the cations in each molecule considering the oxidation numbers.

K⁺¹I⁻¹ + Pb⁺²(NO₃)₂⁻¹ ⇒ K⁺¹NO₃⁻¹ + Pb⁺² I₂⁻¹

KI + Pb(NO₃)₂ ⇒ KNO₃ + PbI₂

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PLEASE HELP! DUE TODAY! How many gram of magnesium react with 120 ml H3PO4 (with molar concentration 2M)?

nika2105 [10]

Answer:

3.89 g Mg

Explanation:

2M = 2 mol/L

120 mL = 0.120 L

2 mol/L *0.120 L = 0.240 mol H3PO4

3Mg + 2H3PO4 ----> Mg3(PO4)2 + 3H2

from reaction 3 mol 2 mol

given 0.240mol x mol

x = 0.240*2/3 = 0.16 mol Mg

M(Mg) = 24.3 g/mol

24.3 g/mol *0.16 mol = 3.89 g Mg

8 0

3 years ago

What types of matter could be separated by physical methods?

rewona [7]

I believe the correct answer to this question is:

“Mixtures”

By definition, mixtures are combination of substances which are not really chemically combined and hence separable by physical means. There are two types of mixtures, homogeneous and heterogeneous, both are also separable by physical means.

<span>This is as opposed to Compounds which are chemically bonded and cannot be separated by physical means.</span>

4 0

4 years ago

A sample of helium, at 20 °c, occupies a volume of 3.17 l at a pressure of 6.21 atm. what volume does this helium sample occupy

Lynna [10]

Boyle's law gives the relationship between pressure of a gas and volume.
It states that at a constant temperature the pressure of gas is inversely proportional to volume of gas.
PV = k
where P - pressure, V - volume and k - constant
P1V1 = P2V2
where parameters for the first instance are given on the left side and parameters for the second instance are given on the right side of the equation.
substituting these values in the equation
6.21 atm x 3.17 L = 5.57 atm x V
V = 3.53 L
new volume is 3.53 L

8 0

4 years ago

Which of the following is a correct formula unit of an ionic compound?

goldenfox [79]

Answer : The correct formula unit of an ionic compound is Ca(OH)2

Explanation :

An ionic compound is formed when a metal atom donates one or more electrons to a non metal atom.

During this process, metal gains a positive charge and a nonmetal gets a negative charge.

In an ionic compound, these charges on the ions are balanced so that the overall compound is neutral.

Let us check which of the given compounds have a neutral charge.

1) Al2F3 : Charge on Al is +3 and that on F is -1.

The total charge on 2 Al is 2x3 = +6.

The total charge on 3 F atoms is 3x(-1) = -3

The overall charge on the compound is +6-3 = +3.

That means the given formula unit is not correct.

2) Ca2O : Charge on Ca is +2 and that on O is -2

Total charge on Ca is 2x2 = +4

The overall charge is +4-2 = +2

Therefore the given formula unit is not correct.

3) Ca(OH)2 : The charge on Ca ion is +2 and that on OH is -1.

The total charge on 2 OH ions is 2x(-1) = -2

The overall charge is +2-2 = 0

This gives a neutral compound.

Therefore the given formula unit is correct.

6 0

4 years ago

Read 2 more answers

Identify a predator from a Himalayan Mountain ecosystem. How else can this animal be classified in terms of feeding relationship

postnew [5]

Answer:

A snow leopard is one of the top consumers in the Himalayas who lives in dens that are close to somewhere to look down to watch its prey. They also use it's large paws to climb up slopes and snow and a long tale to balance on thin spaces to catch markhhors.

Explanation:

6 0

2 years ago