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
german
3 years ago
7

Help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
1 answer:
bearhunter [10]3 years ago
4 0

Answer:

2Na + 2H₂O -> 2NaOH + H₂; 4 moles of H₂ will be produced

Explanation:

Begin by balancing the equation:

2Na + 2H₂O -> 2NaOH + H₂

Reactants: 2 Na, 4 H, 2 O

Products: 2 Na, 4 H, 2 O

Convert 8 moles of Na to H₂ by using the stoichiometric ratios from the balanced equation:

8 mol Na x 1 mol H₂/2 mol Na = 4 mol H₂

You might be interested in
At Jim's auto shop, it takes him minutes to do an oil change and minutes to do a tire change. Let be the number of oil changes h
Juli2301 [7.4K]

Answer:

The total time that Jim needs to change x oil changes and y tire changes is less than 180 min.

The time needed for x oil changes is 12 * x.

The time needed for y tire changes is 18 * y.

The total time is the sum of the above times and needs to be less than 180 that is

12 * x + 18 * y < 180 divide both sides of equation by 6

12/6 * x + 18/6*y < 180/6

2*x + 3*y < 30

2*x < 30 - 3*y divide both sides by 2 to get the inequality for x

x < 30/2 - 3/2*y = 15 - 1.5 y < 15 that is x < = 15

2*x + 3*y < 30

3*y < 30 - 2*x divide both sides by 3 to get the inequality for y

y < 30/3 - 2/3 *x = 10 - 2/3*x < 10 that is y < = 10

Also we can write x + y < x+ 3/2 * y < 15.

Explanation:

Jim's can do not more then 5 oil changes and not more then 10 tire changes or all together she can do not more then 15 total of oil and tire changes.

5 0
4 years ago
Given the equation:
Archy [21]
X will be hydronium (H3O)
3 0
3 years ago
Read 2 more answers
diamond has a density of 3.26 g/cm3. what is the mass of a diamond that has a volume of 0.313 cm cubed
DaniilM [7]
D = m / V

3.26 = m / 0.313

m = 3.26 x 0.313

m = 1.02038 g

hope this helps!
6 0
3 years ago
A study of the decomposition reaction 3RS2  3R + 6S yields the following initial rate dat
shutvik [7]
Missing question: What is the rate constant for the reaction?
<span>[RS2](mol L-1) Rate (mol/(L·s))
0.150                0.0394
0.250                0.109
0.350                0.214
0.500                0.438</span>
Chemical reaction: 3RS₂ → 3R + 6S.
Compare second and fourth experiment, when concentration is doubled, rate of concentration is increaced by four. So rate is:
rate = k·[RS₂]².
k = 0,438 ÷ (0,500)².
k = 1,75 L/mol·s.
3 0
3 years ago
Rocky objects that are massive enough will have a spherical shape due to the force of gravity. (no links or else I will report y
Vesnalui [34]
“About 300 kilometers across have irregular shapes because their internal gravity is not strong enough to compress the rock into a spherical shape” so I’m guessing it’s false ?
5 0
3 years ago
Other questions:
  • Why is it possible to use physical properties to separate a mixture
    13·2 answers
  • Why is carbon the basis for the many different kinds of organic molecules? Select all that apply. A. It can connect with several
    5·1 answer
  • One step in the production of hydraulic power involves _____
    12·1 answer
  • An element's atomic number is 68. How many protons would an atom of this element have?
    9·2 answers
  • What do you use to test ph in swimming pool
    12·1 answer
  • Which of the following statements is not true?
    8·1 answer
  • Identify the base in this acid-base reaction:
    15·1 answer
  • Why is sexual reproduction beneficial
    12·1 answer
  • What happen when molten zinc bromide is electrolysised
    14·1 answer
  • 0/10<br> The molar mass of iron
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!