1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Angelina_Jolie [31]
3 years ago
15

15 points for only two question :) please help

Chemistry
1 answer:
vodomira [7]3 years ago
8 0
Ionization energy increases as you move left to right in a period . that's why noble gases have high ionization energies.
shielding effect increases from top to bottom in a group atomic size also increases from top to bottom in a group
You might be interested in
How many moles of calcium oxide are formed when 3 moles of calcium react with oxygen?
Temka [501]

Answer:

3 moles of CaO

Explanation:

The chemical balanced equation is;

2Ca + O₂ → 2CaO

The ratio of calcium(Ca) to Calcium Oxide(Cao) in this equation is 2:2.

Now, when 3 moles of calcium react with oxygen, Cao produced will be;

3 moles of O₂ × 2 moles of CaO/2 moles of Cao = 3 moles of CaO

7 0
3 years ago
Refer to the following illustration. How many hydrogen atoms could bond with oxygen?
WITCHER [35]
2. 

The reason why is because there are 2 available electron spots on the orbital for the oxygen atom. Hydrogen atoms have one proton and one electron, thus, in order to fill the oxygen atom orbital to a full outer shell, a maximum of 2 atoms could bond with the oxygen atoms. 

6 electrons (oxygen)+ 1 electron (hydrogen)+ 1 electron (hydrogen)= 8 
4 0
3 years ago
Read 2 more answers
I’m not too sure about this
sergey [27]
Answer 1: molecules
3 0
3 years ago
Many factors influence the amount of a solute which will dissolve in a solvent.<br> True<br> False
Nikitich [7]
This is true there are many factors that influence the amount of a solute.
8 0
2 years ago
At high temperatures, sulfur combines with iron to form brown-black iron(II) sulfide:
taurus [48]

The percent yield : 79.9%

<h3>Further eplanation </h3>

Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

Fe(s)+S(s)⇒FeS(s)

The reaction produces 6.29 g of iron(II) sulfide⇒an actual yield

The maximum  amount that can be produced is 7.87 g ⇒ A theoretical yield

\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{6.29}{7.87}\times 100\5=79.9\%

3 0
3 years ago
Other questions:
  • A solid precipitate is formed from the reaction of lead nitrate and sodium chromate. What would be the best method to separate t
    11·2 answers
  • You are using a beaker to measure volume. the beakers graduation begin at 20ml and in indicate every 10ml up to 80 ml. the botto
    9·1 answer
  • The arrows in the image show the direction in which carbon is moving Which process of the carbon cycle is indicated
    8·1 answer
  • Which atom attracts electrons more strongly?
    7·2 answers
  • A compound is a pure substance composed of two or more elements, combined by chemical means, in a definite ratio. Which containe
    5·1 answer
  • Which is the strongest acid? Ch3ch2ch2chfch2co2h ch3ch2ch2cbr2ch2co2h ch3ch2ch2cf2ch2co2h ch3chbrch2ch2ch2co2h ch2clch2ch2ch2ch2
    14·1 answer
  • Identify the structure of a compound of molecular formula C4H8O2 that gives the following 1H NMR data: 0.95 (triplet, 3 H), 1.65
    15·1 answer
  • Explain how Newton's idea about inertia has helped in astronomy?
    15·2 answers
  • What is the atomic number for an element whose mass number is 78,
    7·2 answers
  • What factors have caused the rise in global temperatures over the past century?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!