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
soldier1979 [14.2K]
2 years ago
5

THIS IS URGENT PLEASE HELPPPPPP (NO LINKS PLEASE)

Chemistry
1 answer:
WARRIOR [948]2 years ago
3 0

Answer: The chemical formula for barium chloride shows the number of ATOMS of each element in the SMALLEST representative unit of the substance.

Explanation:

The chemical formula of compound are ways in which a chemical substance is being expressed using chemical symbols to show types of atoms and subscripts to indicate the number of atoms of each element. It shows the number of atoms in a single ( smallest) representative unit of the substance. Using the compound BaCl2;

"Ba" represents the abbreviation for the element "Barium" while "Cl2" represents the abbreviation for the element "chloride" with the subscript of two indicating the number of atoms of chlorine.

There are steps to be considered while writing a chemical compound of a substance, they include:

--> write the symbol of all the elements that forms the compound ( Ba and Cl).

--> write the valency of each element. (Ba has 2 valence electrons while Cl has 1 valence electron).

--> exchange the valency of the both elements such that Ba bears valency of 1 and Cl bears valency of 2 electrons.

--> finally, write the valency of second atom as subscript of first and Write valency of first atom as subscript of second. You will achieve BaCl2 as your chemical formula.

You might be interested in
Do subatomic particles have mass
katovenus [111]

Answer:

Yes

Explanation:

Masses for the three subatomic particles can be expressed in amu (atomic mass units) or grams. For simplicity, we will use the amu unit for the three subatomics. Both neutrons and protons are assigned as having masses of 1 amu each.

5 0
3 years ago
Conociendo el volumen de la solución y la masa del soluto y su masa molar, ¿qué concentración es posible determinar
NISA [10]

Answer:

Conociendo el volumen de solución, masa de soluto y su masa molar, es posible determinar: B) Concentración molar

La molaridad es la relación entre el número de moles de soluto y los litros de solución. Más:

M = No moles de solución de soluto / volumen (L)

Y a su vez los moles de soluto se encuentran por:

No moles de soluto = masa soluto / masa molar soluto

8 0
3 years ago
If 72.5 grams of calcium metal (Ca) react with 65.0 grams of oxygen gas (O2) in a synthesis reaction, how many grams of the exce
Natali5045456 [20]
2Ca + O2 = 2CaO
First, determine which is the excess reactant
72.5 g Ca (1 mol) =1.8089725036
(40.078 g)

65 g O2 (1 mol) =2.0313769611
(15.999g × 2)
Since the ratio of to O2 is 2:1 in the balanced reaction, divide Ca's molar mass by 2 to get 0.9044862518. this isn't necessary because Ca is already obviously the limiting reactant. therefore, O2 is the excess reactant.

Now do the stoichiometry
72.5 g Ca (1 mol Ca) (1 mol O2)
(40.078 g Ca)(2 mol Ca)(31.998g O2)

=0.0282669621 g of O2 left over
5 0
3 years ago
If 10.57 g of magnesium reacts completely with 6.96 g of oxygen, what is the percent by mass of oxygen in magnesium oxide? Round
Deffense [45]

Answer:

39.7 %

Explanation:

magnesium + oxygen ⟶ magnesium oxide

   10.57 g         6.96 g               17.53 g

According to the <em>Law of Conservation of Mass</em>, the mass of the product must equal the total mass of the reactants.

Mass of MgO = 10.57 + 6.96

Mass of MgO = 17.53 g

The formula for mass percent is

% by mass = Mass of component/Total mass × 100 %

In this case,

% O = mass of O/mass of MgO × 100 %

Mass of O = 6.96 g

Mass of MgO = 17.53 g

% O = 6.96/17.53 × 100

% O = 0.3970 × 100

% O = 39.7 %

5 0
3 years ago
Match these items with their examples.
kiruha [24]
Here you go! Feel free to ask questions!

7 0
3 years ago
Read 2 more answers
Other questions:
  • Alguien quien hable español ​
    5·2 answers
  • For the chemical equation SO 2 ( g ) + NO 2 ( g ) − ⇀ ↽ − SO 3 ( g ) + NO ( g ) the equilibrium constant at a certain temperatur
    5·1 answer
  • The table shows the students data from an investigation about a plant growth and five plants of the same type what is the best w
    10·1 answer
  • When 35.0 mL of 0.400 M hydrobromic acid and 35.0 mL of 0.400 M ammonia are combined, the pH of the resulting solution will be :
    8·1 answer
  • Which of the following is a polar molecule?
    13·1 answer
  • HCHO2 + NaOH = NaCHO2 + H2O complete ionic
    11·1 answer
  • What is the electron configuration of rubidium?
    12·1 answer
  • Can a cold front warm air moves which direction
    15·1 answer
  • PLEASE HELP WILL GIVE BRAINLIEST
    7·1 answer
  • Write an explanation of the relationship between genes, proteins, and traits for the Blue Lobster.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!