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
STALIN [3.7K]
3 years ago
15

Need help on atoms and molecules​

Chemistry
1 answer:
balu736 [363]3 years ago
7 0

1-b

2-c

3-a

4-d

5-d

6-b

7-a

You might be interested in
If environmental scientists want to publish a paper on an experiment for an audience of fellow speacialist where do they do so
aliina [53]
It would be c. Newspaper story
5 0
3 years ago
Read 2 more answers
How many grams of sodium bromide must be dissolved in 500. 0 g of water to produce a 0. 600 molal solution? Show your work.
prisoha [69]

Answer:

20.6

Explanation:

I don't know how to show the work for  it without pencil and paper but go from there, Good Luck!

4 0
2 years ago
PLEASE HELP!
svetoff [14.1K]

Answer:

period 3 and group 3

Explanation:

I'm saying group 3 because that is how I learnt it at school, but if you count it then it's in group 13.

8 0
3 years ago
How much silver is produced is 15.00 grams of cu is added to the solution of excess silver nitrate?
il63 [147K]
First write out the balanced equation. 3Cu+2Ag(NO3)3=2Ag+3Cu(NO3)2
Then convert copper from grams to moles
15 g*1 mol cu/63.54 g= 15/63.54 mol cu
Then use the mole ratio to convert Moles Cu to Moles Ag
15/63.54 moles Cu* 2 moles Ag/3 moles Cu
The final awnser is (15*2)/(63.54*3) moles Ag =0.157 moles Ag. If the question wants the answer in grams, convert from moles Ag to grams Ag.
0.157 moles Ag*107.87 g Ag/ mol Ag=16.98 g Ag
6 0
3 years ago
Consider the following reaction at a high temperature. Br2(g) ⇆ 2Br(g) When 1.35 moles of Br2 are put in a 0.780−L flask, 3.60 p
UNO [17]

Answer : The equilibrium constant K_c for the reaction is, 0.1133

Explanation :

First we have to calculate the concentration of Br_2.

\text{Concentration of }Br_2=\frac{\text{Moles of }Br_2}{\text{Volume of solution}}

\text{Concentration of }Br_2=\frac{1.35moles}{0.780L}=1.731M

Now we have to calculate the dissociated concentration of Br_2.

The balanced equilibrium reaction is,

                              Br_2(g)\rightleftharpoons 2Br(aq)

Initial conc.         1.731 M      0

At eqm. conc.      (1.731-x)    (2x) M

As we are given,

The percent of dissociation of Br_2 = \alpha = 1.2 %

So, the dissociate concentration of Br_2 = C\alpha=1.731M\times \frac{1.2}{100}=0.2077M

The value of x = 0.2077 M

Now we have to calculate the concentration of Br_2\text{ and }Br at equilibrium.

Concentration of Br_2 = 1.731 - x  = 1.731 - 0.2077 = 1.5233 M

Concentration of Br = 2x = 2 × 0.2077 = 0.4154 M

Now we have to calculate the equilibrium constant for the reaction.

The expression of equilibrium constant for the reaction will be :

K_c=\frac{[Br]^2}{[Br_2]}

Now put all the values in this expression, we get :

K_c=\frac{(0.4154)^2}{1.5233}=0.1133

Therefore, the equilibrium constant K_c for the reaction is, 0.1133

7 0
3 years ago
Other questions:
  • I need help. ASAP! Look at the picture below. (2)
    8·1 answer
  • At STP, what physical property of aluminum always remains the same from sample to sample?
    6·1 answer
  • How many moles are in 300.1 g of ammonia, NH3? Be sure to show ALL work below!! (Hint: This question will require you to change
    9·1 answer
  • The diagram below shows the movement of Earth plates.
    5·2 answers
  • Help Asap plz Thx giving lots of points!!!
    7·1 answer
  • Which of the following genotypes would result in a red phenotype?
    7·1 answer
  • How many grams of H2O will be produced if 8.08x1024 atoms of Fe are produced?
    7·1 answer
  • Question 18
    9·1 answer
  • Miscible liquids that have different boiling points can be separated by _______.
    12·1 answer
  • A neutral cloth and a neutral rod are rubbed together. Electrons are transferred from the rod to the cloth. What will be the fin
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!