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
djyliett [7]
3 years ago
8

How many moles of magnesium oxide are formed when 4 moles of magnesium react with oxygen? this is the formula for the reaction:?

Chemistry
1 answer:
Alisiya [41]3 years ago
5 0
Mg + O2(o is a diatomic element)⇒ Mg O(UNBALANCED)
Mg is +2, o is -2, so MgO is the product.
BALANCED EQUATION :  2Mg + O2 ⇒ 2MgO
There are 4 moles of magnesium, so there should be 4/2*2=4 moles of oxygen, and the product will have 4+4=8 moles.
there will be 8 moles of magnesium oxide.


You might be interested in
A space air is at a temperature of 75 oF, and the relative humidity (RH) is 45%. Using calculations, find: (a) the partial press
earnstyle [38]

Answer:

A) Partial Pressure of dry air = 13.32 KPa

Partial Pressure of water vapour = 1.332 KPa

B) Humidity ratio; X = 0.0691

C) V_p = 0.8384 m³/Kg

Explanation:

A) We are given;

Temperature = 75°F

Relative Humidity = 45%

Now,to calculate the partial pressure, we will use the relationship;

Relative Humidity = (Partial Pressure/Vapour Pressure) × 100%

Making partial pressure the subject;

Partial Pressure = Relative Humidity × Vapour Pressure/100%

From the first table attached, at temperature of 75°F, the vapor pressure is 29.6 × 10^(-3) bar = 29.6 KPa

Thus;

Partial Pressure of dry air = (45 × 29.6)/100

Partial Pressure of dry air = 13.32 KPa

From online values, vapour pressure of water vapour at 75°F = 2.96 KPa

Thus;

Partial Pressure of water vapour = (45 × 2.96)/100 = 1.332 KPa

B) humidity ratio of moist air is given as;

X = 0.62198 pw / (pa - pw)  

where;

pw = partial pressure of the water vapor in moist air

pa = atmospheric pressure of the moist air

Thus;

X = (0.62198 × 1.332)/(13.32 - 1.332)  

X = 0.0691

C) Formula for moist air specific volume is;

V_p = (1 + (xRw/Ra) × RaT/p

Where;

V_p is specific volume

T is temperature = 75°F = 297.039 K

p is barometric pressure which in this case is standard sea level pressure = 101.325 KPa

pw is partial pressure of the water vapor in moist air = 1.332 KPa

Rw is individual gas constant for water = 0.4614 KJ/Kg.K

Ra is individual gas constant for air = 0.2869 KJ/Kg.K

V_p = (1 + (0.0691 * 0.4614/0.2869)) × 0.286.9 * 297.039/101.325

V_p = 0.8384 m³/Kg

6 0
3 years ago
Help help help help help help help help
ohaa [14]

Answer:Switch off lighting in refrigeration areas when not in use?

Explanation:

7 0
3 years ago
Is the production of nitrogen(II) oxide exothermic or endothermic?
LuckyWell [14K]
It’s a exothermic reaction.
3 0
2 years ago
Which atom’s ionization energy is greater than that of phosphorus (P)?
Anna71 [15]
The first ionisation energy of silicon is greater than that of phosphorus.
7 0
3 years ago
You are given a clear-water solution containing potassium nitrate. How could you determine whether the solution is unsaturated,
igor_vitrenko [27]

Answer:

If it is unsaturated, we can dissolve some more amounts of potassium nitrate into it Explanation:

5 0
3 years ago
Other questions:
  • There are 2.60 x 1015 short tons of oxygen in the atmosphere ( 1 short ton = 2000 lb). How many metric tons of oxygen are oresen
    9·1 answer
  • In which process are glucose and oxygen the reactants?
    13·2 answers
  • Why was Einstein named after Einsteinium <br><br> This is worth 15 points <br><br> Please help.
    6·1 answer
  • What main criterion determines major divisions in the geologic time scale?
    11·1 answer
  • Item 3
    8·1 answer
  • Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. Th
    5·1 answer
  • So I lost my sense of taste yesterday.
    7·2 answers
  • True or False: Just like protons, the
    11·1 answer
  • One sugar produced by photosynthesis is called
    11·1 answer
  • What is the limiting reactant if 12 moles of p4 react with 15 moles of o2?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!