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
ella [17]
3 years ago
11

Will mark brainliest if solved correctly.

Chemistry
2 answers:
Kamila [148]3 years ago
6 0

Answer:

The answers for the questions are in the picture.

rusak2 [61]3 years ago
4 0

Answer:0.25M

Moles

Explanation:

In a solution of 2.0 litres

The mole of kno3= reacting mass/molar mass

Reacting mass = 56

Molar mass =101

Substituting the values

Mole= 56/101*2

Mole 0.25M

Number 2

N= CV

C= concentration

V=volume

N= 3*2230/1000

N= 6690/1000

N= 6.69

N=6.7moles

You might be interested in
Students in a chemistry class are drawing molecular models based on molecular formulas they are given by the teacher.
Karo-lina-s [1.5K]
Sorry I need this marks
5 0
3 years ago
How many particles are in the nucleus of an atom of fluorine-19?
svetoff [14.1K]

Answer:

9 protons, 10 neutrons, and 9 electrons.

Explanation:

The particles of the nucleus of an atom of Fluorine-19 is

9 protons, 10 neutrons, and 9 electrons.

4 0
2 years ago
Read 2 more answers
An unknown compound displays singlets at δ 2.1 ppm and 2.56 ppm in the ratio of 3:2. what is the structure of the compound?
olasank [31]

1) As can be seen from any 1H NMR chemical shift ppm tables, hydrogens which have δ values from 2ppm to 2.3ppm are hydrogens from carbon which is bonded to a carbonyl group. From this, we can conclude that our hydrogens belong to the type, but from 2 different alkyl groups because of 2 different signals.

 

2) So, one alkyl group is CH3 and second one can be CH or CH2.

 

3) If we know that ratio between two types of hydrogens is 3:2, it can be concluded that second alkyl group is CH2. 


4) Finally, we don't have any other signals and it indicates that part of the compound which continues on CH2 is exactly the same as the first part.

The ratio remains the same, 3:2 ie 6:4

7 0
3 years ago
Which of the following can be used to neutralize an ammonia (NH3) solution?
german
Water or also known as H2O
6 0
3 years ago
She slams her fist onto the calculator with 8000 j of KE. If she moved her arm at 3 m/s, what is the mass of her fist?
Makovka662 [10]

Answer:

1777.7

Explanation:

kE =0.5mv^2

8000=9/2 m

1777.7

3 0
3 years ago
Other questions:
  • If you had a 5 gram sample of lawrencium how much would still remain in 30 minutes
    6·1 answer
  • Certain atoms emit photons of light with an energy of 3.820 ✕ 10−19 J. Calculate the frequency (in Hz) and wavelength (in nm) of
    15·1 answer
  • A lawnmower runs on gasoline.what type of energy transformation takes place in its engine?
    13·2 answers
  • a student balanced the chemical equation for the reaction of magnesium with oxygen by writing Mg + O2 ----> MgO2. What is wro
    12·1 answer
  • The energy to move water And allow it to change from a to a gas or solid ultimately comes from the
    13·1 answer
  • The general equation for an acid base reaction looks lik:
    9·2 answers
  • On a cool morning, Uyen’s breath can form a cloud when she breathes out. Which changes of state are most responsible for Uyen se
    7·2 answers
  • maye Iesult TUI di2... Warm-Up Exercises for Chapter 2 - Acid-Base Reactions roblem 2.68 Part C Which of the following reactions
    14·1 answer
  • Why are properties of covalent compounds so diverse
    6·1 answer
  • How is a pure substance different from a mixture? A.Pure substances are separated by physical means B. Mixtures cannot be separa
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!