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
Olenka [21]
3 years ago
6

Help please the second question. I really need help guys

Chemistry
1 answer:
statuscvo [17]3 years ago
6 0

Answer:

106g/mol

Explanation:

Mass of Na=2×23=46

Mass of C=12

Mass of O=3×16=48

Total mass of Na2CO3=106g/mol

You might be interested in
Which statement best describes how sediment forms?
Anit [1.1K]

Weathering breaks down rock and other material

8 0
3 years ago
A laboratory requires 2.0 L of a 1.5 M solution of hydrochloric acid (HCl), but the only available HCl is a 12.0 M stock solutio
ira [324]
The amount of the solute is constant during dilution. So the mole number of HCl is 2*1.5=3 mole. The volume of HCl stock is 3/12=0.25 L. So using 0.25 L stock solution and dilute to 2.0 L.
6 0
3 years ago
Read 2 more answers
Using the following equation
Valentin [98]
Thermal energy when solid, liquor , and gas combine
7 0
3 years ago
Read 2 more answers
During an experiment, 104 grams of calcium carbonate reacted with an excess amount of hydrochloric acid. If the percent yield of
postnew [5]

Answer:

92.4 grams.

Explanation:

  • From the balanced reaction:

<em>CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O,</em>

1.0 mole of CaCO₃ reacts with 2.0 moles of HCl to produce 1.0 mole of CaCl₂, 1.0 mole of CO₂, and 1.0 mole of H₂O.

  • We need to calculate the no. of moles of (104 g) of CaCO₃:

<em>no. of moles of CaCO₃ = mass/molar mass</em> = (104 g)/(100.08 g/mol) = <em>1.039 mol.</em>

<u><em>Using cross multiplication:</em></u>

1.0 mole of CaCO₃ produce → 1.0 mole of CaCl₂.

∴ 1.039 mole of CaCO₃ produce → 1.039 mole of CaCl₂.

∴ The amount of CaCl₂ produced = no. of moles x molar mass = (1.039 mol)(110.98 g/mol) = 114.3 g.

∵ percent yield of the reaction = [(actual yield)/(theoretical yield)] x 100.

Percent yield of the reaction = 80.15%, theoretical yield = 115.3 g.

<em>∴ actual yield = [(percent yield of the reaction)(theoretical yield)]/100 </em>= [(80.15%)/(115.3 g)] / 100 = <em>92.42 g ≅ 92.4 g.</em>

7 0
3 years ago
1. There is no formation of volcanoes in the convergence between
tester [92]

A volcano is caused by a rupture in the crust from which molten magma

escapes

The correct options are;

  1. B. Two continental plates
  2. C. Volcanoes
  3. C. A tsunami in the ocean
  4. C. The temperature in the mantle is higher than in the crust
  5. A. Volcanic island arcs
  6. A. Earthquake
  7. B. Trench
  8. C. Subduction
  9. A. Fault
  10. C Tsunami
  11. A. Convergent plate boundary
  12. See attached drawing (<em>Based on Department of Education Science Module)</em>
  13. D. a, b and c
  14. C. Converging oceanic plates
  15. It is where the oceanic plates subduct under the continental plate

Reasons:

1. Due to the equal densities and buoyancy of the plates, there is no

subduction and the plates rise to form mountain ranges and no volcanoes.

2. The subduction causes the plates to form magma and then volcanoes.

3. Shallow earthquakes that have their epicenter at the fault line in the

ocean generate a tsunami.

4. The mantle lay under each plate and therefore, the high temperatures

of the mantle does not support the fact.

5. Volcanic arcs are formed in the convergence of two oceanic or oceanic

and continental plates.

6. When two continental plates converge, shallow earthquakes occur.

7. A crack called a trench is formed by the interaction of an oceanic crust

and another crust.

8. A subduction occurs when oceanic plates converge.

9. A fault is produced by horizontal plate movement.

10. A Flip or kick upwards of water is known as a tsunami.

11. Subduction occurs during convergence of two plates such that a

subducted plate goes down beneath an overriding plate.

12. The illustration of seafloor spreading consists of two plates moving

away from each other.

<em>Question 12: Based on Department of Education Science Module</em>.

<em />

13. Earthquake occur at places where the plates are moving (including

subducting).

14. Volcanic island arcs are formed by two oceanic plates.

15. At the location where the continents meet the seas, oceanic plates are

subducted under the continental plate, melted to magma in the mantle

from which volcano is formed.

Learn more about volcanoes here:

brainly.com/question/19424796

5 0
3 years ago
Other questions:
  • What characterizes an Arrhenius acid
    6·1 answer
  • Which of the following mixture can be separated by sedimentation?
    8·1 answer
  • Write the balanced molecular equation for the reaction of barium hydroxide with perchloric acid. What is the coefficient of H2O?
    8·2 answers
  • What is the weight of a 90kg man standing on Earth, where gᵉᵃʳᵗʰ = 9.82 m/s^2?
    7·1 answer
  • A particular container holds 4.29 mol of neon gas. The volume of this container can be altered by sliding a piston in or out. Th
    9·1 answer
  • Which method of heat transfer can take place without matter? O Conduction O Convection O Insulation O Radiation​
    15·2 answers
  • To fight a bacterial infection, a patient was given an antibiotic to take for 10 days.
    6·1 answer
  • What is the chemical properties of milk
    7·1 answer
  • According to the following reaction, how many grams of carbon tetrachloride will be formed upon the complete reaction of 27.7 gr
    5·1 answer
  • Which compound is produced by a neutralization?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!