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
ddd [48]
4 years ago
15

Question 3 0

Chemistry
1 answer:
Tanya [424]4 years ago
5 0

Answer:

Option D. KBr < KCl < NaCl

Explanation:

We'll begin by calculating the number of mole of each sample.

This can be obtained as follow:

For NaCl:

Mass = 1 g

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mole of NaCl =?

Mole = mass /Molar mass

Mole of NaCl = 1/58.5

Mole of NaCl = 0.0171 mole

For Kbr:

Mass = 1 g

Molar mass of KBr = 39 + 80 = 119 g/mol

Mole of KBr =?

Mole = mass /Molar mass

Mole of KBr = 1/119

Mole of KBr = 0.0084 mole

For KCl:

Mass = 1 g

Molar mass of KCl = 39 + 35.5 = 74.5 g/mol

Mole of KCl =?

Mole = mass /Molar mass

Mole of KCl = 1/74.5

Mole of KCl = 0.0134 mole

Summary

Sample >>>>>>>> Number of mole

NaCl >>>>>>>>>> 0.0171

KBr >>>>>>>>>>> 0.0084

KCl >>>>>>>>>>> 0.0134

Arranging the number of mole of the sampl in increasing order, we have:

KBr < KCl < NaCl

You might be interested in
Determine the mass of 5.20 moles of C6H12 (gram-formula mass = 84.2 grams/mole).
SIZIF [17.4K]
5.20 mol C6H12* (84.2 g/mol C6H12)= 4.38*10^(2) g C6H12.

The answer should only have three significant figures, according to the numbers in the problem.

Hope this is helpful~
7 0
3 years ago
Arrange the following units in decreasing order: nm,km,pm,Dm,mm,m,cm,hm,gm
goblinko [34]

The units are nm (nano-meter), km (kilo-meter), pm (pico-meter), dm (decimeter), mm (millimeter), m (meter), cm (centimeter), hm (hectometer) and gm (gigameter). Now we can express each of these units in terms of m.

1 nm = 10^{-9}m, 1 Km = 10^{3}m 1 pm = 10^{-12}m, 1 dm = 0.1 m, 1 mm = 0.001 m, 1 cm = 0.01 m, 1 hm = 100 m, 1 gm = 10^{9} m. Thus the decreasing unit will be

gm>km>hm>m>dm>cm>mm>nm>pm      

3 0
3 years ago
1. The Yerkes-Dodson Law says
goblinko [34]

Answer:

The Yerkes-Dodson Law suggests that there is a relationship between performance and arousal. Increased arousal can help improve performance, but only up to a certain point.

Explanation:

4 0
3 years ago
Please help me with chemistry
jok3333 [9.3K]
I will, I am in a chemistry class right now. What’s up?
8 0
3 years ago
A 623 ml sample of gas at STP is allowed to expand (like the universe) until it
RSB [31]
12000 ml would be d to my calculations but then u can 12
7 0
3 years ago
Other questions:
  • Match the humidities with their description.
    14·1 answer
  • Which statements about oxygen and nitrogen are true? Select all the correct answers. a. They are both normally found as gases in
    15·1 answer
  • Consider the balanced chemical equation,
    14·2 answers
  • Which one of the following compounds is an example of a covalent molecule?
    7·1 answer
  • Which of the following is NOT a type of energy conversion process?
    9·2 answers
  • Classify each substance as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound. If
    9·2 answers
  • 0.25 L of aqueous solution contains 0.025g of HCLO4 (strong acid) what will be the Ph of the solution g
    15·1 answer
  • What is the equilibrium expression for the reaction below?<br> 2Na(s) + 02) Na2O2,(s)
    15·1 answer
  • Which of these are the starting materials for cellular respiration?
    10·1 answer
  • Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!