If an element, X, can form an oxide that has theformula X2O3, then element X would most likely be located on the Periodic Table in the same group as(1) Ba (3) In
(2) Cd (4) Na

Answers

Answer 1

Answer:

Answer: (3) In

Explanation: As the given compound is $X_2O_3$ , it can be said that X has a valency of 3.

1)Barium (Ba): Atomic no: 56: $Xe6s^2$ : In order to complete its octet, it needs to donate 2 electrons, and thus the valency is 2.

2) Cadmium (Cd) : Atomic no: 48: $Kr5s^24d^(10)$ : In order to complete its octet, it needs to donate 2 electrons, and thus the valency is 2.

3) Indium (In): Atomic no: 49: $Kr5s^25p^(1)$ : In order to complete its octet, it needs to donate 3 electrons, and thus the valency is 3.

4) Sodium (Na): Atomic no: 11: $Ne3s^1$ : In order to complete its octet, it needs to donate 1 electron, and thus the valency is 1.

So the given element could only belong to the group containing Indium (In) as all the elements in the same group exhibit similar valency.

Answer 2

Answer: In! This is becasue it has a valency of 3

Related Questions

Life is possible on earth because of suitable air water and temperatures true or false
Potassium has nineteen protons. how many electrons does a neutral potassium atom have? a. 0 b. 17 c. 19 d. more information is needed to figure this out.
To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 4.4-L bulb, then filled it with the gas at 1.00 atm and 22.0 ∘C and weighed it again. The difference in mass was 5.1 g . Identify the gas.
Which of the following is the smallest volume? (2 points) 2500 mL 250 cm3 2.5 x 10-2 L 25 m3
Calculate the massa of water produced if 1.00 gran of hydrogen is burned in 10.00 grams of oxygen(work as well pleaseee)

If the current in a wire is directed upward, what is the direction of the magnetic field produced by the current?

Answers

Horizontal if I am correct

The amount of oxygen formed when 12.26 g of KClO3 is heated is ________.

Answers

Answer:

approximately 4.8 grams of oxygen gas is formed.

Explanation:

To determine the amount of oxygen (O2) formed when 12.26 grams of potassium chlorate (KClO3) is heated, we need to consider the chemical reaction that occurs during this process. When KClO3 is heated, it decomposes into potassium chloride (KCl) and oxygen gas (O2).

The balanced chemical equation for this reaction is:

2 KClO3(s) → 2 KCl(s) + 3 O2(g)

From the equation, we can see that 2 moles of KClO3 produce 3 moles of O2.

Calculate the molar mass of KClO3:

K: 39.10 g/mol

Cl: 35.45 g/mol

O: 16.00 g/mol

Molar mass of KClO3 = (39.10 + 35.45 + 3 * 16.00) g/mol = 122.55 g/mol

Calculate the number of moles of KClO3 in 12.26 grams:

Moles of KClO3 = (12.26 g) / (122.55 g/mol) = 0.1 moles

Now, we can determine the number of moles of O2 produced using the mole ratio from the balanced equation:

Moles of O2 = (0.1 moles of KClO3) * (3 moles of O2 / 2 moles of KClO3) = 0.15 moles

Finally, convert moles of O2 to grams:

Mass of O2 = (0.15 moles) * (32.00 g/mol for O2) = 4.8 grams

So, when 12.26 grams of KClO3 is heated, approximately 4.8 grams of oxygen gas is formed.

Considering the law of conservation of mass, if 56 g samples of solid iron (Fe) reacts with 24 g of oxygen (O2), how many grams of Iron Oxide (FeO) are obtained?

Answers

Answer:

62_grams of FeO

Explanation:

Molar mass of Fe = 55.845_g/mol

Molar mass of O2 = 15.999_g/mol

From law of conservation of mass

2 moles of Fe combines with one mole of O2 to form 2 moles of FeO

Number of moles of Fe and O2 present = mass/(molar mass) = 56/55.845~1

and 24/16 = 1.1.5

Therefore

1 part of Fe will react with 0.5 part of one mole of O2

which is 54_g of Fe reacts with 8_g to form 54+8 = 62_grams of FeO

Did Pb2+ react with KI? Yes or No? State the reason of your answer.

Answers

Yes, Pb2+ react with KI.

Pb2+ is lead (II) ion
KI is a compound. It is a combination of potassium (K) and iodine (I). It is called potassium iodide.

Both potassium and iodine are highly reactive elements. Thus, when they are combined with another element like Pb2+, Pb2+ reacts with KI

Answer: Yes, lead ion will react with potassium iodide.

Explanation: When lead ion reacts with KI, a bright yellow colored precipitate is formed.

The reaction of these two follows:

$Pb^(2+)(aq.)+2KI(aq.)\rightarrow PbI_2(s)+2K^+(aq.)$

Hence, $Pb^(2+)$ ion reacts with KI to yield $PbI_2$

This test is the confirmatory test for lead ion which is present in Group I.

a cylinder of oxygen gas is cooled from 300K to 150K by what factor does the average kinetic energy of the oxygen molecules in the cylinder decrease

Answers

Answer:

The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

$K=(3RT)/(2N_A)$

where,

K = Average kinetic energy

R = Gas constant

T = Temperature of the system

$N_A$ = Avogadro's number

Average kinetic energy of oxygen gas molecule at 300 K.

$K.E=(3R* 300 K)/(2N_A)$ ..[1]

Average kinetic energy of oxygen gas molecule at 150 K.

$K.E'=(3R* 150 K)/(2N_A)$ ..[2]

[1] ÷ [2]

$(K.E)/(K.E')=((3R* 300 K)/(2N_A))/((3R* 150 K)/(2N_A))=(300)/(150)=2$

$K.E'=0.5* K.E$

The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.

Temperature is a measure of average kinetic energy thus absolute temperature is proportional to average kinetic energy. It should be half: same factor as the temperature.

If solving for the slope of the best fit line it is a good choice to choose the points on the line.True
False

Answers

I think that statement is trueThe best fit line is a straight line that best represents the data on a scatter plot.This line may pass through some of the points, none of the points, or all of the points, choosing the points on the line will make it esier to find the best fit line

The correct answer its True

hope it helps

can i get brainlyest please??

Other Questions

How many moles of water will be generated during the combustion of 0.38 moles of methyl alcohol (CH3OH)? 2CH3OH + 3O2 2CO2 + 4H2O

Saltwater _____. has a pH of 10 is mostly used for irrigation and farming can be desalinized and used for drinking is mostly found in glaciers, ice caps, and aquifers

My sister is a peach" is a metaphor. TrueFalse

If a crystal added to an aqueous solution causes many particles to come out of the solution, the original solution wasa. saturated.b. unsaturated.c. supersaturated.d. an emulsion.