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
12345 [234]
4 years ago
6

How do you balance a chemical eqation?

Chemistry
1 answer:
galina1969 [7]4 years ago
8 0
Make sure there are the same number of each kind of atom on each side of the equation
You might be interested in
A 100 W light bulb is placed in a cylinder equipped with a moveable piston. The light bulb is turned on for 2.0×10−2 hour, and t
drek231 [11]

Answer:

(a) ΔU = 7.2x10²

(b) W = -5.1x10²

(c) q = 5.2x10²

Explanation:

From the definition of power (p), we have:

p = \frac {\Delta W}{\Delta t} = \frac {\Delta U}{\Delta t} (1)

<em>where, p: is power (J/s = W (watt)) W: is work = ΔU (J) and t: is time (s) </em>  

(a) We can calculate the energy (ΔU) using equation (1):

\Delta U = p \cdot \Delta t = 100 \frac{J}{s} \cdot 2.0\cdot 10^{-2} h \cdot \frac{3600s}{1h} = 7.2 \cdot 10^{2} J  

(b) The work is related to pressure and volume by:

\Delta W = -p \Delta V

<em>where p: pressure and ΔV: change in volume = V final - V initial      </em>

\Delta W = - p \cdot (V_{fin} - V_{ini}) = - 1.0 atm (5.88L - 0.85L) = - 5.03 L \cdot atm \cdot \frac{101.33J}{1 L\cdot atm} = -5.1 \cdot 10^{2} J

(c) By the definition of Energy, we can calculate q:

\Delta U = \Delta W + \Delta q

<em>where Δq: is the heat transfer </em>

\Delta q = \Delta U - \Delta W = 7.2 J - (-5.1 \cdot 10^{2} J) = 5.2 \cdot 10^{2} J    

I hope it helps you!  

6 0
4 years ago
Identify the state of matter in between C&amp;D.
ladessa [460]

Answer:

Here's the answer in order

A

B

B

C

C

A

A

D

A

C

D

Explanation:

lol nvm

6 0
3 years ago
All changes in phase (solid-liquid-gas) are
tatuchka [14]

Answer:

States of matter

Explanation:

Three states of matter

7 0
3 years ago
Why is the atomic weight of carbon reported as 12.011 in the table of elements and the periodic table in the front inside cover
Oduvanchick [21]
The atomic weight reported in the periodic table of elements for Carbon is the average weight of all the known isotopes of Carbon occurring naturally. There are 3: Carbon-12, Carbon-13 and Carbon-14. The numbers represent the mass numbers, or the sum of neutrons and protons in the nucleus. Each of the individual masses are multiplied with their individual percentage abundances. Then, when you add them up, it will yield the average atomic weight equal to 12.011 amu or grams/mole C.
5 0
4 years ago
Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece
Taya2010 [7]

Answer:

The correct answer is B has a neutral pH

Explanation:

we all know that acid converts blue litmus to red on the other hand base converts red litmus paper to blue.

       According to the question the blue litmus paper does not change its colour or it stays blue that means the pH of solution is neutral or7 which prevent the colour change of the litmus paper.

    If the solution was acidic then the blue litmus paper changes into red .

5 0
3 years ago
Other questions:
  • Suggest two ways that chemical pollutants could be carried far from their sources
    8·1 answer
  • Which of the following is kept constant when using a coffee cup calorimeter? Temperature Density Mass Pressure
    15·2 answers
  • You have 1169.6 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams o
    10·2 answers
  • Josh is doing an experiment with water. He starts with a plastic cup of water that has a mass of 12 grams. He places the cup in
    6·2 answers
  • Name the basic assumptions that the kinetic theory makes about gases
    11·1 answer
  • Koolaid is a solution. What is the solute? What is the solvent?​
    13·1 answer
  • Atomic #
    14·1 answer
  • Question 5: Causes of Molecular Shape (3 points)
    7·1 answer
  • In what sense is peace necessary for education?​
    9·2 answers
  • Calculate the molarity of 0.5 moles NaHCO3<br> in 5,314 mL of solution.<br> How do I solve this?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!