CHEMISTRY HIGH SCHOOL

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 1
Answer:

Answer:

D Period 1, Group 18

Explanation:

it's helium

it's top right corner of the periodic table

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What would be the temperature of 0.6 moles of fluorine that occupy 15 L at 2,300 mmHg?

Which air pollutant affects people who have heart disease?Carbon monoxide
Pollution
Particulate matter
Ozone

Answers

The correct answer is the third option. Particulate matter is the air pollutant known to affect people with a heart disease. According to research, this pollutant is associated with an increased risk of cardiovascular diseases.

Answer:

the answer is Particulate matter

Explanation:

How many primary oxygen systems are there? One Five Three Ten

Answers

The answer is three.
There are three type types of oxygen therapy system. The Compressed Oxygen Cylinders or commonly known as green tanks, the Oxygen Concentrators, and the Liquid Oxygen Systems. The type of oxygen system you need varies on the amount oxygen you need. 

How many liters of chlorine gas can react with 56.0 grams of calcium metal at standard temperature and pressure? Show all of the work used to find your answer.Ca + Cl2 CaCl2

Answers

The balanced chemical reaction is:

Ca + Cl2 =  CaCl2

We are given the amount of calcium metal to be used for this reaction. This will be the starting point for the calculations.

56 g Ca ( 1 mol Ca / 40.08 g Ca) (1 mol Cl2 / 1 mol Ca) ( 22.414 L Cl2 / 1 mol Cl2 ) = 31.32 L Cl2 gas produced from the reaction

Answer:

31.36 L of chlorine gas will react with 56 g of calcium.

Explanation:

Ca + Cl_2\rightarrow CaCl_2

Mass of calcium = 56 g

Moles of calcium gas = (56 g)/(40 g/mol)=1.4 moles

According to reaction, 1 mole of calcium react with 1 mole of chlorine gas.

Then 1.4 mol of calcium wiull react with :

(1)/(1)* 1.4 = 1.4 mol chlorine gas

At standard temperature and pressure. 1 mol of gas occupies 22.4 L of volume.

Then 4.1 moles of chlorine gas will occupy :

22.4 L\tmes 4.1 =31.36 L

31.36 L of chlorine gas will react with 56 g of calcium.

An aqueous solution of lithium hydroxide contains hydroxide ions as the only negative ion in the solution. Lithium hydroxide is classified as an

Answers

An Arrhenius acid refers to a component, which dissociates in water to produce hydrogen ions, or it can also be stated as that the acid enhances the concentration of hydrogen ions in an aqueous solution. On the other hand, an Arrhenius base refers to a component, which gets dissociate in water to produce hydroxide ions, or it can be said that a base enhances the concentration of hydroxide ions in an aqueous solution.  

Therefore, an aqueous solution of lithium hydroxide comprising hydroxide ions as the sole negative ion in the solution is classified as an Arrhenius base.

Answer is an Arrhenius Base.

Put the elements potassium iron bromine and krypton in order of increasing electro negativity

Answers

Answer:

K < Fe < Br < Kr

Explanation:

Given chemical elements;

      Potassium

      Iron

      Bromine

      Krypton

Problem; arrange in order of increasing electronegativity

Solution:

The electronegativity of an element measures the relative tendency with which the atoms of the element attracts valence electrons in the chemical bond.

 To solve this problem, we are going to use values of electronegativity from the Pauling's electronegativity table of elements;

       For;

            Potassium  = 0.8

            Iron = 1.83

            Bromine  = 2.8

            Krypton = 3.0

So;

  K < Fe < Br < Kr

Which of the following factors renders a species more susceptible to disease and infertility?

Answers

The correct answer is this one: "B. inbreeding." Inbreeding renders a species more susceptible to disease and infertility. On the other hand, Large genetic diversity tends to be perceived as beneficial so that a single disease does not wipe out a species. 

Here are the choices
A. Large genetic diversity 
B. inbreeding 
C. crossbreeding 
D. recessive traits

Answer:

inbreeding

Explanation:
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