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
Lostsunrise [7]
4 years ago
15

What coefficient is assumed if no coefficient written before a formula in a chemical equation

Chemistry
1 answer:
Mice21 [21]4 years ago
7 0

Answer:

1

Explanation:

Consider the following reaction:

Phosphorus burn in the presence of air and produced diphosphorus pentoxide.

Chemical equation:

P₄ + O₂ → P₂O₅

Balanced chemical equation:

P₄ + 5O₂ → 2P₂O₅

Equation is balanced because there are four phosphorus atoms ans ten oxygen atoms in both side of equation.

Coefficient with reactant and product:

P₄         1

O₂        5

P₂O₅    2

There is no coefficient written before P₄ it means only one P₄ is present.

You might be interested in
When aluminum, AlAl, metal is dipped in an aqueous solution of hydrochloric acid, HClHCl, hydrogen gas, H2H2, is produced with t
kifflom [539]

Answer:

Balanced equation: 2Al(s)+6HCl(aq.)\rightarrow 2AlCl_{3}(aq.)+3H_{2}(g)

Explanation:

  • Al is an metallic species with a standard reduction potential of -1.66 V( E_{Al^{3+}\mid Al}^{0}=-1.66V).
  • H_{2} is present at the intermediate position in electrochemical series with a standard reduction potential of 0 V (E_{H^{+}\mid H_{2}}^{0}=0V).
  • So, when Al is dipped in aqueous solution of HCl, Al is readily oxidized to produce Al^{3+} whereas H^{+} is reduced to H_{2} .
  • Hence, as a whole, aqueous AlCl_{3} and gaseous H_{2} is produced as products.

Balanced equation: 2Al(s)+6HCl(aq.)\rightarrow 2AlCl_{3}(aq.)+3H_{2}(g)

5 0
4 years ago
0.0045 cm or 0.0045 in. Larger quantity​
just olya [345]

Hello There!

0.0045 Inches are larger than centimeters.

6 0
3 years ago
Read 2 more answers
Josie draws models of the particles within a substance. Which model best represents the particles in
Pachacha [2.7K]
D I'm pretty sure...........
5 0
3 years ago
How would you find the mass of an object from its density and volume ?
Lina20 [59]

Answer:

Mass= volume x density

Explanation:

Multiply the density by the volume.

7 0
3 years ago
A 50.0 mL of 0.88 M H2O2 and 10.0 mL of 0.50 M Fe(NO3)3 were combined and a temperature change of 7.47 was observed. The specifi
Shtirlitz [24]

Answer:

The heat of reaction -1.9 kilo Joules.

Explanation:

Volume of the hydrogen peroxide solution = 50.0 mL

Volume of the ferric nitrate solution = 10.0 mL

Total volume of the solution = 50.0 mL + 10.0 mL = 60.0 mL

Mass of the final solution = m

Density of water = density of the final solution = d = 1 g/mL

Mass=density\times Volume

m=1 g/ml\times 60.0 ml=60.0 g

Heat capacity of the mixture = c = 4.18 J/g°C

Change in temperature of the mixture = ΔT = 7.47°C

Heat absorbed by the mixture = Q

Q=mc\Delta T

Q=60.0 g\times 4.18 J/g ^oC\times 7.47 ^oC=1873.48 J=1.873 kJ\approx 1.9 kJ

Heat release due to reaction = -Q'

-Q' =Q (law of conservation of enrage)

Q'= -Q = -1.9 kJ

The heat of reaction -1.9 kilo Joules.

7 0
4 years ago
Other questions:
  • What characterizes the calcite compensation depth (CCD), in terms of input and destruction (dissolution)?
    13·1 answer
  • Ethanol is an example of an ____________ (carboxyl/alcohol).
    11·1 answer
  • Select all that apply. The rate law for the reaction 2NO(g) + CU(g) rightarrow 2NOCl(g) is given by R = k[NO][Cl2] If the follow
    5·1 answer
  • 1) Describe enthalpy and the role specific heat plays in the formula. 2) Explain the significance of the sign of the enthalpy va
    12·1 answer
  • Look at the image of the moon which moon phase does it show
    14·2 answers
  • What percent of earths total volume is the crust
    5·1 answer
  • In which of the following cases does the reaction go to farthest to completion ?
    6·1 answer
  • The empirical formula of glucose is CH2O, and the molecular formula of glucose is 6 times than the empirical formula. What is th
    13·1 answer
  • What is the new pressure if the temperature outside is 296k and his weight causes the tire's volume to drop to 2.0 liters
    14·1 answer
  • Please help fast, I will give brainliest!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!