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
Romashka-Z-Leto [24]
2 years ago
14

What are the diaganol relationship between lithium and magnesium?​

Chemistry
1 answer:
olga55 [171]2 years ago
6 0

Answer:

Explanation:

Diagonal relationship of lithium with magnesium

1) Both have almost similar electronegativities. 2) Both Li and Mg are quite hard. They are harder and lighter than other elements in their respective groups. 3) Both LiOH and Mg(OH)2 are weak bases.

You might be interested in
Which is the MOST accurate description of diffusion of materials through the cell membrane in order to maintain homeostasis?
krok68 [10]
Hello there! 

I believe "<span>b. Nutrients move from an area of lower concentration to an area of higher concentration." is correct!

Have a cool day! -Wajiha</span>
7 0
3 years ago
Read 2 more answers
What is solubility?
erik [133]

2) Solubility is how much solvent will dissolve in solute.

4 0
2 years ago
Read 2 more answers
Which of the following statements holds true for a chemical change?
ad-work [718]

Answer : The correct option is C.

Explanation :

Chemical change : It is defined as a change in which a new compounds are formed by the chemical reaction. Changes occurs in their chemical composition and properties.

The molecular structure of a substance changes in a chemical reaction is a chemical change.

  • Change in molecular structure means that there is a breaking and formation of bonds in a molecule.

The example of chemical change in terms of change in molecular structure is the reaction of hydrogen with oxygen.

The reaction of hydrogen with oxygen is,

H_2(g)+O_2(g)\rightarrow 2H_2O(l)

In this reaction, the H-H bond is break and O-H bond is form.


6 0
3 years ago
Read 2 more answers
What is a wind turbine often used for?
kirill115 [55]

Answer:

A

Explanation:

Converting thermal energy into electrical energy

5 0
3 years ago
Read 2 more answers
The vapor pressure of water at 25.0°c is 23.8 torr. determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500.
svp [43]
Q: A
according to this formula, we can get the mole fraction of water (n):
P(solu) = n Pv(water)
when we have Pv(solu) = 22.8 and Pv(water) = 23.8 so by substitution:
22.8 = n * 23.8
n= 0.958
- we need to get the moles of glucose:
moles of water = 500 g(mass weight) / 18 (molar weight)= 27.7 mol
n = moles of water / ( moles of water + moles of glucose)
0.958   = 27.7 / ( 27.7+ moles of glucose)
0.958 moles of glucose + 26.5 = 27.7
0.968 moles of glucose = 1.2
moles of glucose = 1.253 mol
∴ the mass of glucose = no.of glucose moles x molar mass 
                                      = 1.253 x 180 = 225.5 g
Q: B
here we also need to get n (mole fraction of water )by using this formula:
Pv(solu) = n Pv(water)
when we have Pv(solu)=132 & Pv(water)=150 so, by substition:
132= n * 150
n = 0.88
so, mole fraction of solution = 1 - 0.88 = 0.12
and we can get after that the moles of water = (mass weight / molar mass)
- no.moles of water = 85 g / 18 g/mol = 4.7 moles
- total moles in solution = moles of water / moles fraction of water 
                                        = 4.7 / 0.88 = 5.34 moles 
∴ moles of the solution = total moles in solu - moles of water 
                                       = 5.34 - 4.7 = 0.64 moles solute
∴ the molar mass of the solute = mass weight of solute / no.of moles of solute
                                                    = 53.8 / 0.64 = 84 g/mole

Q: C

moles of urea (NH2)2 CO = mass weight / molar mass
                                           = 4.49 g / 60 g /mol
                                           = 0.07 mol
moles of methanol = mass weight / molar mass 
                                 = 39.9  g / 32  g/mol = 1.25 mol
moles fraction of methanol = moles of methanol / (moles of methanol + moles of urea )
moles fraction of methanol = 1.25 / ( 1.25+0.07) = 0.95
by substitution in Pv formula we will be able to get the vapour pressure of the solu :
Pv(solu) = n P°v
Pv(solu) = 0.95 * 89 mm Hg 
∴Pv(solu) = 84.55 mmHg


 
7 0
3 years ago
Other questions:
  • When 80 g of sodium hydroxide, naoh, are dissolved in enough water to make 500 ml of solution, the molarity of the solution is?
    9·1 answer
  • The molecule h2so4is ionized to h+ ions and so4- ions in water. would you predict this to result in a solution that is acidic or
    14·1 answer
  • PLEASE HELP! 50 POINTS IF CORRECT!
    5·2 answers
  • What is an output force?
    13·2 answers
  • Describe one everyday situation in which it would be useful to identify an unknown substance
    9·1 answer
  • Calculate the molarity of a solution obtained dissolving 10.0 g of cobalt(Ⅱ) bromide hexahydrate in enough water to make 450 mL
    10·1 answer
  • What feature appears at point A on the topographic map?<br> depression<br> swamp<br> road<br> school
    7·2 answers
  • ASAP HELP PLZZZZ
    11·1 answer
  • How much heat is absorbed when 15.0 g of liquid water is
    9·1 answer
  • Give an example for multi cellular fungi​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!