the trend for ionization energy is a general increase from left to right across a period. However phosphorus is found to have higher first ionization energy value than sulfur. Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion

Answers

Answer 1

Answer: Since phosphorus is in the 5th group it has the ability to gain or lose electrons

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Mendeleev saw trends in the physical and chemical properties of elements when he organized them by _____.atomic number

physical properties

atomic weight

density

Answers

Answer:

atomic weight

Explanation:

Mendeleev realised that the physical and chemical properties of elements were related to their atomic weight

hope it helps4

If the temperature of air increased, how would it affect the rate of condensation of water vapor

Answers

It will increase the rate of the condensation

when the temperature around the water vapor cooled down, it loses its capacity to hold the water, so they will for water droplets.

For example you can compare a warm cup of tea and a warm cup of tea with an ice in it. You will find a lot of water droplets in the iced one because cooler air could held less water than the warm one

A student measures the mass of a substance as 1.7132kg and it's volume as 0.65l. What is the density substance in g/mL? Round your answer to the correct number of significant figures

Answers

Answer:

The substance has a density of 2.636 grams per mililiter.

Explanation:

We must remember that density ( $\rho$ ), measured in grams per mililiters, is the mass of the substance ( $m$ ), measured in grams, divided by its volume ( $V$ ), measured in mililiters. That is:

$\rho = (m)/(V)$

In addition, a kilogram equals 1000 grams and a liter equals 1000 mililiters. If we know that $m = 1713.2\,g$ and $V = 650\,mL$ , then:

$\rho = (1713.2\,g)/(650\,mL)$

$\rho = 2.636\,(g)/(mL)$

The substance has a density of 2.636 grams per mililiter.

Trends in the periodic table indicate that the element with the greatest ionization energy is in which of the following periods and groups?a
Period 2, Group 1
b
Period 7, Group 2
c
Period 6, Group 17
d
Period 1, Group 18

Answers

Answer:

D Period 1, Group 18

Explanation:

it's helium

it's top right corner of the periodic table

Which numbers are used? Consider the balanced chemical equation that follows. You are asked to determine how many moles of water you can produce from 4.0 mol of hydrogen and excess oxygen. (Excess oxygen means that so much oxygen is available it will not run out.) Which of the numbers that appear in the balanced chemical equation below are used to perform this calculation?

Answers

I am assuming that the balanced equation is
2H₂ + O₂ ⇒ 2H₂O
Since the hydrogen is the limiting reagent (meaning if the hydrogen runs out the reaction stops), we need to compare the mole ratio between hydrogen and water.

The mole ratio between H₂ and H₂O is 2:2, or 1:1 (as seen on the coefficients of the balanced equation)
And so for every mole of hydrogen, it will be equal to water. Since hydrogen is 4 moles, 4 moles of water would be created.

So we use the coefficients of H₂ and H₂O in order to answer this question.

The number of moles of H2O is proportional to the number of moles of H2 as much as 4 moles

The calculation reference is the mole of the limiting reagent of the mole of H2O is based on the mol of H2

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Stokiometry in Chemistry learns about chemical reactions mainly emphasizing quantitative, such as calculation of volume, mass, number, which is related to the number of ions, molecules, elements, etc.

In chemical calculations, the reaction can be determined, the number of substances that can be expressed in units of mass, volume, mole, or determine a chemical formula, for example, the substance level or molecular formula of the hydrate.

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

In the reactionequation there are also manifestations of reagent substances namely gas (g), liquid (liquid / l), solid (solid / s) and solution (aqueous / aq).

Known variable

4.0 mol of hydrogen and excess oxygen

Asked

the balanced chemical equation

Answer

Reactions that occur:

2H₂ + O₂ ⇒ 2H₂O

The reaction coefficient shows the mole ratio of reactants and reaction products

In determining the mole of the reaction, the calculation reference is the mole of the limiting reagent or the reagent that runs out. Because here it is stated that oxygen (O₂) is reacted under excess conditions, the hydrogen ratio becomes the limiting reagent. So the determination of the mole of H₂O is based on the mol of H₂

In the equivalent equation, the mole of H₂ and H₂O is 2: 2 or can be simplified to 1: 1, so the number of moles of H₂O is proportional to the number of moles of H₂ as much as 4 moles

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Excess reactant

brainly.com/question/6857557

The percentage yield

brainly.com/question/12044319

Limiting reactant

brainly.com/question/5798341

Keywords: limiting reactant, excess, reaction coefficient, the balanced chemical equation, H₂O, O₂, H₂

Is zinc coMpund Plz help me

Answers

Answer:

it is indeed a compound

Explanation:

Zinc is NOT a compound.

A compound contains two or more elements or molecules like H2O. Where H is 1 element and Oxygen is another and together they make a compound.

Zinc itself is a single molecule (or element) and can be used in a compound like ZnO (zinc oxide)

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