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
castortr0y [4]
3 years ago
9

Help! What did I do wrong??

Chemistry
1 answer:
iogann1982 [59]3 years ago
4 0

The molecules  of hydrogen gas that are  formed is  when 48.7 g  of sodium are added to water  is  6.375  x 10²³  molecules


  <u><em>calculation</em></u>

2 Na +2H₂O →  2 NaOH  +H₂

Step 1: find the moles  of sodium (Na)

moles =mass÷   molar mass

from periodic table the molar mass of Na = 23 g/mol

moles= 48.7 g÷ 23 g/mol =2.117 moles

Step 2:use the mole ratio to determine  the  moles of H₂

  from  given equation  Na:H₂ is 2:1

therefore the moles  of H₂ = 2.117 moles x 1/2=1.059 moles

Step 3: find the molecules of H₂ using the Avogadro's law

According  to  Avogadro's  law  1 mole = 6.02 x 10²³ molecules

                                                      1.059 moles = ?  molecules

by cross multiplication

= [(1.059 moles x 6.02 x10²³  molecules) /  1 mole] =6.375  x 10²³  molecules

You might be interested in
What else is produced during the combustion of butane, C4H10?
denpristay [2]

Another product: CO₂

<h3>Further explanation</h3>

Given

Reaction

2C₄H₁₀ + 13O₂⇒ 8__+ 10H₂O

Required

product compound

Solution

In the combustion of hydrocarbons there can be 2 kinds of products

If there is excess Oxygen, you will get Carbon dioxide(CO₂) and water in the product

If Oxygen is low, you'll get Carbon monoxide(CO) and water

Or in other ways, we can use the principle of the law of conservation of mass which is also related to the number of atoms in the reactants and in the products

if we look at the reaction above, there are C atoms on the left (reactants), so that in the product there will also be C atoms with the same number of C atoms on the left

2C₄H₁₀ + 13O₂⇒ 8CO₂+ 10H₂O

5 0
2 years ago
Read 2 more answers
If two objects have the same mass, what must be true? choose the correct answer A. They have the same volume B. They are made of
Nataly_w [17]
C. Mass is kind of like a measurement of matter.
7 0
3 years ago
Read 2 more answers
Which of the following statements is TRUE? Question 5 options: The emission spectrum of a particular element is always the same
amm1812

Answer:

All of the above are true

Explanation:

a) The emission spectrum of a particular element is always the same and can be used to identify the element: It's true since the emission spectrum for each element is unique. It has the same bright lines at the same wavelength. This feature is used to identify elements. For example, the study of the emission spectra of light arriving from stars allow us to identify the elements presents in the star because the light contains the emission spectra of those elements.

b)The uncertainty principle states that we can never know both the exact location and speed of an electron:  It is true since the velocity of an electron is related to its wave nature, while its position is related to its particle nature and we cannot simultaneously measure electron's position and velocity with precision.

c) An orbital is the volume in which we are most likely to find an electron: An orbital is a probability distribution map that is used to decribe the likely position of an electron in an atom.

5 0
3 years ago
_____ is the degree of attraction of one atom for the valence electrons of another atoms. Electronegativity Ionization energy Co
yan [13]
<span>Electronegativity maybe.......</span>
4 0
3 years ago
Read 2 more answers
A chemistry student measures out 41 grams of sodium hydroxide, NaOH. They react it with an excess of hydrochloric acid, HCl, for
exis [7]
The answer will be around 687.928 grams
8 0
3 years ago
Other questions:
  • Which statement correctly describes the rate of decomposition of SO3 at equilibrium?
    15·1 answer
  • you need 16.66ml (+-0.01) of 53.4 (+-0.4)wt% of NaOH with a density of 1.52 (+-0.01)g/mL to prepare 2.00L of 0.169M of NaOH. Wha
    8·1 answer
  • Calculate the molar mass of CH4 gas at STP when 5.46Lof the gas weighs 4g??​
    6·1 answer
  • What is the rate for the second order reaction Products when [A] = 0.371 M? (k = 0.761 M's")​
    9·1 answer
  • Explain the importance of concentration as it pertains to a solution
    12·1 answer
  • Agitation causes the dissolving rate of most solutes to:
    5·1 answer
  • What is the average speed of a skateboarder who travels 20 km in 2 hours
    6·1 answer
  • 8.
    11·1 answer
  • Define An Atom.<br>Ty!!!​
    15·2 answers
  • The picture above shows a water wave hitting the beach. Which of the following is true about this process?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!