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
Flauer [41]
3 years ago
11

20. Tell one thing that is true about these balanced chemical equations. Explain your answer. A + B → CDE.     H2 + O2 → H2O2.  

  Reactant → Product.                a. They are balanced so they have more reactants than products. b. They are not balanced so they have more products than reactants. c. The chemical reaction used up some of the reactants mass. d. The mass of the reactants and the mass of the products are equal.
Chemistry
1 answer:
sweet-ann [11.9K]3 years ago
4 0
D because the mass evens out the objct
You might be interested in
You have 0.21 moles of Al how many atoms do you have
ZanzabumX [31]

Number of atoms : 1.26 x 10²³

<h3>Further explanation  </h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

0.21 moles of Al, so n = 0.21

Number of atoms :

\tt N=0.21\times 6.02\times 10^{23}\\\\N=1.26\times 10^{23}

8 0
2 years ago
What is the net ionic equation for the following? :)
I am Lyosha [343]

Answer:

1. Mg (s) + 2Na+(aq) → 2Na(s) + Mg²⁺(aq)

2. 2K(s) + Cd²⁺(aq) → 2K⁺(aq) + Cd(s)

Explanation:

The net ionic equation of a reaction express only the chemical species that are involved in the reaction:

1. Mg (s) + Na2CrO4 (aq) → 2Na + MgCrO4(aq)

The ionic equation:

Mg (s) + 2Na+(aq) + CrO4²⁻ (aq) → 2Na + Mg²⁺ + CrO4²⁻(aq)

Subtracting the ions that don't change:

<h3>Mg (s) + 2Na+(aq) → 2Na + Mg²⁺</h3>

2. 2K(s) + Cd(NO3)2(aq) → 2KNO3(aq) + Cd(s)

The ionic equation:

2K(s) + Cd²⁺(aq) + 2NO3⁻(aq) → 2K⁺(aq) + 2NO3⁻(aq) + Cd(s)

Subtracting the ions that don't change:

<h3>2K(s) + Cd²⁺(aq) → 2K⁺(aq) + Cd(s)</h3>

3 0
3 years ago
You need 1.2 moles of H2SO4 for an experiment. You weigh out 100g of this colorless syrupy liquid. Do you have enough?
Sladkaya [172]
Answer is: not enough <span>colorless syrupy liquid.
</span>n(H₂SO₄) = 1,2 mol.
M(H₂SO₄) = 2Ar(H) + Ar(S) + 4Ar(O) · g/mol.
M(H₂SO₄) = 2·1 + 32 + 4·16 · g/mol.
M(H₂SO₄) = 98 g/mol.
m(H₂SO₄) = n(H₂SO₄) · M(H₂SO₄).
m(H₂SO₄) = 1,2 mol · 98 g/mol.
m(H₂SO₄) = 117,6 g needed.
100 g is less that 117,6 g.
8 0
4 years ago
Which of the following is a salt that will form from the combination of a strong base with a weak acid?
zaharov [31]

Answer:

A. NaHCO₃

Explanation:

NaHCO₃ ⇒ NaOH + H₂CO₃

NaOH is a strong base and H₂CO₃ is a weak acid. Therefore, NaHCO₃ is a salt of a strong base-weak acid reaction. The salt is basic because carbonic acid (H₂CO₃) is a weak acid so it remains undissociated. So, there is a presence of additional OH⁻ ions that makes the solution basic.

Hope that helps.

8 0
3 years ago
An ionic bond is a bond
vesna_86 [32]

Answer:

That involve the complete transfer of an electron from one atom of an element to another

7 0
3 years ago
Other questions:
  • What is the meaning of weight?
    9·2 answers
  • What does the word terrestial mean?
    10·2 answers
  • The following data were obtained for the reaction 2A + B → C where rate = Δ[C]/Δt [A](M) [B](M) Initial Rate (M/s) 0.100 0.0500
    15·1 answer
  • An aqueous solution of ammonia is found to be basic. This observation can be explained by the net ionic equationHNO3(aq) + H2O(l
    10·1 answer
  • 08 03 M
    9·1 answer
  • The +3 charge more common than +2 charge for transition metals in the Fe group. What accounts for this trend?
    14·1 answer
  • What is the difference between covalent bonding and electrovalent bonding​
    7·1 answer
  • The repeating subunits that are responsible for the chance of a crystal are know as
    8·1 answer
  • Convert 1.25 atm to torr.​
    9·1 answer
  • 8. How much heat, in kilojoules, is needed to produce 1850 grams of ammonia (NH3),
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!