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
kondor19780726 [428]
3 years ago
5

C= 51.89% H= 9.82% Br=38.29%

Chemistry
1 answer:
maks197457 [2]3 years ago
3 0

Answer:

a

Explanation:

You might be interested in
Name a lustrous non- metal ?​
kogti [31]

Answer:

it is iodine it seems very right

5 0
3 years ago
Read 2 more answers
How many kilograms are in 4 moles of Na2CO3?
castortr0y [4]
First you need to find the amount of mass of Na2CO3 in one moles
(Use periodic chart)

Na= 22.99 x 2 = 45.98
C = 12.01
O = 16.00 x 4 = 64.00

Add the molar masses together to get 121.99

To find how many grams are in 4 moles, times 121.99 by 4
This gives you 487.96

But the questions asks for the answer to be in kilograms nor grams, to change into kilograms divide by 1000
This gets you the answer: 0.49 kg

6 0
3 years ago
Lead can be prepared from galena [lead(II) sulfide] by first roasting the galena in oxygen gas to form lead(II) oxide and sulfur
Vesna [10]

Answer:

a) Step 1:

2PbS(g)+3O_2(g)\overset{roasting}\rightarrow 2PbO(s)+2SO_2(g)

Step 2:

2PbO(s)+PbS(s)\overset{\Delta }\rightarrow 3Pb(l)+SO_2(g)

b) The overall balanced reaction for given process is ;

3PbS(s)+3O_2(g)\rightarrow 3Pb(l)+3SO_2(g)

Explanation:

a)

Galena = PbS

Lead(II) oxide = PbO

Sulfur dioxide = SO_2

Step 1:

Roasting the galena in oxygen gas to form lead(II) oxide and sulfur dioxide.

Balanced equation of step 1:

2PbS(g)+3O_2(g)\overset{roasting}\rightarrow 2PbO(s)+2SO_2(g)..[1]

Step 2:

Heating the metal oxide with more galena forms the molten metal and more sulfur dioxide.

Balanced equation of step 2:

2PbO(s)+PbS(s)\overset{\Delta }\rightarrow 3Pb(l)+SO_2(g)..[2]

b)

For over all reaction add [1] and [2]. The overall balanced reaction for given process is ;

3PbS(s)+3O_2(g)\rightarrow 3Pb(l)+3SO_2(g)

5 0
3 years ago
Read 2 more answers
A piece of silver is observed to be scratched bent and coated with tarnish. which is the chemical change?
Tomtit [17]

Answer:

The answer is D.

Explanation:

Silver consists of 92.5% silver, and the remaining part is copper. ... Pure silver is not susceptible to tarnish in a pure oxygen environment. However, the copper that is contained in 925 sterling silver may react to the ozone and hydrogen sulfide in the air and cause sterling silver to tarnish.

4 0
3 years ago
Read 2 more answers
Pls help with this ​
Natalka [10]
Hirlkrrkkrkrmmrrmmejekkeowoow
3 0
3 years ago
Other questions:
  • What do scientists arrange data in
    10·1 answer
  • How are amphibians different from reptiles
    11·2 answers
  • Can artificial selection aid in the evolution of an organism?
    7·1 answer
  • Write the net ionic equation for the reaction that takes places between aqueous copper and nitrate.
    7·1 answer
  • What gas does photosynthesis produce
    5·2 answers
  • Which of the following is a salt that will form from the combination of a strong base with a weak acid?
    5·1 answer
  • वर्षा के तीन पृकार लिखिए<br>​
    6·1 answer
  • Newton determined that the attractive force between two masses was DIRECTLY proportional to:
    12·1 answer
  • Which statement about stars is correct?
    8·1 answer
  • Which of the following is the best explanation for the fact that crushing increases the rate at which a solid dissolves in a liq
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!