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
LUCKY_DIMON [66]
3 years ago
7

CHEM

Chemistry
2 answers:
castortr0y [4]3 years ago
3 0
Molarity = moles / liter

a) M = 2/4 = 0.5 M

b) Moles = 4/(30 + 16 + 1)
= 0.085
M = 0.085 / 2 = 0.0425 M

c) Moles = 5.85 / (23 + 35.5)
= 0.1
M = 0.1 / 0.4
= 0.25 M
Dmitrij [34]3 years ago
3 0
Molarity =moles of solute /volume of solution. A.) Molarity of glucose =moles of glucose /volume of solution =2/4 = 0.5 M B.) No of moles of KOH= weight of KOH / molecular weight of KOH = 4/ 56.10 =0.07 moles. Therefore, Molarity of KOH =moles of KOH /volume of solution = 0.07/2 = 0.035M. C.) No of moles of NaCl = weight of NaCl/ molecular weight of NaCl = 5.85/58.5 = 0.1moles. Therefore, Molarity of NaCl = moles of NaCl /volume of solution = 0.1/ 400 x 10^-3 = 0.25M
You might be interested in
HELP HELP HELP ME THANKS SHAWTYS ​
saw5 [17]
It’s A



Rjrjdhdnndkejdhdhejekek
6 0
3 years ago
Electronegativity tends to increase from left to right across a row, because A. the number of energy levels increases. B. the sh
goblinko [34]
C. is the answer I believe you are looking for

6 0
3 years ago
Read 2 more answers
90 g of 4 ºC water is heated until the temperature is 37 ºC. If the specific heat of water is 4.184 J/g ºC, calculate the amount
kirill115 [55]

Answer:

?

Explanation:

5 0
3 years ago
A boy fell off a 100 foot ladder. But he did not get hurt. Why not?
Alona [7]
He was not all the way up the ladder he was only on the first couple steps
7 0
3 years ago
Read 2 more answers
How many moles is 90.93 grams of aluminum?
Rashid [163]

Answer:

C) 3.37 moles .

Explanation:

Hello,

In this case, considering that the atomic mass of aluminum is 27.0 g/mol, the moles in 90.93 g of aluminum are computed via the following dimensional analysis:

n=90.93 gAl*\frac{1molAl}{27.0gAl} \\\\n=3.37molAl

Thus, answer is C) 3.37 moles .

Best regards.

6 0
3 years ago
Other questions:
  • What are four basics states of matter
    8·2 answers
  • What is the density of the marble when the mass = 10g
    14·1 answer
  • List two structures that have similar functions in plants and animals.how are they different
    10·1 answer
  • In which list are the elements arranged in order of increasing atomic mass?(1) Cl, K, Ar (3) Te, I, Xe(2) Fe, Co, Ni (4) Ne, F,
    8·1 answer
  • Why are the alkali metals and the halogens among the most reactive elements on the periodic table
    13·2 answers
  • A 5.40 mL sample of an H3PO4 solution of unknown concentration is titrated with a 5.000×10−2 M NaOH solution. A volume of 7.02 m
    12·1 answer
  • how many grams of solid lithium must be added to liquid after in order to obtain 15.0 L of hydrogen gas at STP?
    8·1 answer
  • At a pressure of 1.76 atm and 305 K, a certain gas has a volume of 350.0 mL. What will be the new volume of this gas under STP.​
    15·1 answer
  • Explain why on a hot sunny day it is cooler in the shade​
    14·1 answer
  • If 45.0 mL of a 4.00 M sodium sulfate (Na2SO4) solution is used for a reaction, how many moles of solute were present in the sol
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!