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
krek1111 [17]
3 years ago
6

Exercícios: Fazer a distribuição em subníveis, dizer qual o de maior energia e a configuração da camada de valência; fazer a dis

tribuição em camadas: 1 - 12 Mg (Magnésio) 2 - 35 Br (Bromo) 3 - 47 Ag (Prata) 4 - 55 Cs (Césio) 5 – 14 Si (Silício) 6 – 30 Zn (Zinco) 7 – 92 U (Urânio) 8 – 19 K (Potássio)
Chemistry
1 answer:
AURORKA [14]3 years ago
6 0
Can u write that in English
You might be interested in
I need 2 examples of chemical and physical change. *15 points
melamori03 [73]
*Chemical: Burning of paper and log of wood. - Digestion of food. - Boiling an egg. - Chemical battery usage. - Electroplating a metal. - Baking a cake. - Milk going sour.

*Physical: An ice cube melting into water in your drink. - Freezing water to make ice cubes. - Boiling water evaporating. - Hot shower water turning to steam. - Steam from the shower condensing on a mirror.
3 0
3 years ago
Which of the following is an example of a heterogeneous mixture A.salt-water B.granite C.water(Na)
sladkih [1.3K]
Hi!

B. Granite is an example of a heterogenous mixture.
5 0
2 years ago
A compound with a molar mass of 60g/mol is 40.4% carbon, 6.7% hydrogen and 53.3% oxygen (by mass). determine the emperical and m
Fittoniya [83]

<span>A compound is found to be 40.0% carbon, 6.7% hydrogen and 53.5% oxygen. Its molecular mass is 60. g/mol. 
</span>Q1)
Empirical formula is the simplest ratio of whole numbers of components making up a compound.
the percentages have been given, therefore we can calculate for 100 g of the compound.

                                C                            H                        O
Mass in 100 g      40.0 g                       6.7 g                   53.5 g
Molar mass            12 g/mol                1 g/mol                 16 g/mol
Number of moles   40.0/12= 3.33         6.7/1 = 6.7          53.5/16 = 3.34
Divide by the least number of moles  
                             3.33/3.33 = 1           6.7/3.33 = 2.01   3.34/3.33 = 1.00
after rounding off
C - 1 
H - 2
O - 1

Empirical formula - CH₂O

Q2)
Molecular formula is the actual number of components making up the compound.
To find the number of empirical units we have to find the mass of one empirical unit.
Mass of one empirical unit = CH₂O - 12 + (1x2) + 16 = 30 g
Mass of one mole of compound = 60 g
Number of empirical units = 60 g / 30 g = 2
Therefore molecular formula - 2(CH₂O) 
 Molecular formula - C₂H₄O₂
4 0
2 years ago
soaps do not work well in hard waters. But they can still be effected it large quantities of soap are added to water. Explain wh
zmey [24]
The minerals in hard water react with soap and affect its cleaning capacity. It's still possible to use hard water when washing by using more soap. The additional soap will no longer be affected by the minerals in the water, so they can clean just as effectively, but you'll be wasting more soap this way.
8 0
2 years ago
Which is a NOT a freshwater source on Earth?
cluponka [151]

Answer:

B the atmosphere it's not on earth and I'm pretty sure  the atmosphere doesn't have water in

Explanation:

7 0
2 years ago
Other questions:
  • Select all the items on the following list that are ions.
    11·2 answers
  • In any chemical reaction, the quantities that are preserved are O A. the number of moles and the volumes B. the number of molecu
    10·1 answer
  • Is Italian salad dressing a pure substance or a mixture ?
    9·1 answer
  • Which of the following is not organic?
    9·1 answer
  • Limestone has a density of 2.72 g/cm3. What is the mass of 8.92 cm3 of limestone?
    7·2 answers
  • What is the oxygen number of N in NO2-¹​
    12·1 answer
  • According to the picture above, which layer contains :
    11·1 answer
  • A gas has a volume of 240.0mL at 25.0 oC and 0.79 atm. Calculate its volume at STP (1 atm and 0 oC).
    14·1 answer
  • Which is not an example of a
    6·1 answer
  • The half-life of I-37 is 8.07 days. If 25 grams are left after 40.35 days, how many grams were in the original sample?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!