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
olganol [36]
3 years ago
9

Chemistry unit one does anybody know how to the math part of the unit please .. like the ​

Chemistry
1 answer:
marin [14]3 years ago
3 0

Answer:

1. 156.818182 kg

2. 22.525 gallons

3. 437.4 yds

Explanation:

1. 345/2.2 (since 2.2 lbs equals 1 kg you would divide that by the number of pounds to find kg).

2. 85 x 1.06 = 90.1 (to find the number of qts)

90.1/4 = 22.525 (there are 4 quarts in a gallon so you would divide by 4)

3. 400 x 39.37 = 15,748 (multiply number of meters by the number of inches)

15,748/36 = 437.4 (divide by 36 since you are moving to a bigger unit)

You might be interested in
construct the lewis structure of oo . draw the structure by placing atoms on the grid and connecting them with bonds. include al
ankoles [38]

In Lewis dot structures, you draw the atom in the center and then surround the atom with its valence electrons. The Lewis structure for O is as shown in the attached diagram.

<h3>What is the Lewis structure of O ?</h3>

Lewis Structure of an atom of oxygen contains 6 electrons in the valence shell. Four valence electrons exist in lone pairs. It implies that oxygen atom must participate in two single bonds or one double bond in order to have an octet configuration.

A simplified representation of the valence shell electrons in a molecule  is called Lewis Structure. It shows how electrons are arranged around individual atoms in the molecule.

To know more about Lewis structure, refer

brainly.com/question/1525249

#SPJ4

8 0
1 year ago
Solid potassium chlorate decomposes upon heating to form
olga55 [171]

Answer:

32.6%

Explanation:

Equation of reaction

2KClO₃ (s) → 2KCl (s) + 3O₂ (g)

Molar mass of 2KClO₃ = 245.2 g/mol ( 122.6 × 2)

Molar volume of Oxygen at s.t.p = 22.4L / mol

since the gas was collected over water,

total pressure = pressure of water vapor + pressure of  oxygen gas

0.976 = 0.04184211 atm + pressure of oxygen gas at 30°C

pressure of oxygen = 0.976 - 0.04184211 = 0.9341579 atm = P1

P2 = 1 atm, V1 = 789ml, V2 = unknown, T1 = 303K, T2 = 273k at s.t.p

Using ideal gas equation

\frac{P1V1}{T1} = \frac{P2V2}{T2}

V2 = \frac{P1V1T2}{T1P2}

V2 = 664.1052 ml

245.2   yielded 67.2 molar volume of oxygen

0.66411 will yield = \frac{245.2 * 0.66411}{67.2}  = 2.4232 g

percentage of potassium chlorate in the original mixture = \frac{2.4232 * 100}{7.44} = 32.6%

3 0
3 years ago
When water reacts with potassium metal the hydrogen produced ignites explosively on the surface of water .What cause the ignitio
Julli [10]

Answer:

Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite

Explanation:

7 0
3 years ago
How can a scientist make sure that the results are not a mistake in an experiment?
olga55 [171]
Repeat trials multiple times
8 0
3 years ago
What is one way that fission and fusion are similar?
nignag [31]
The Correct Answer Is <span>Both Processes Produce Energy From Mass. </span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following correctly describe insulin and glucagon? select all that apply.
    11·1 answer
  • At 373.15K and 1 atm, the molar volume of liquid water and steamare 1.88 X 10-5 m3 and 3.06 X 10-2m3, respectively. Given that t
    7·1 answer
  • if an object is moving at a constant speed in one direction, what is needed to change its speed or direction?
    15·2 answers
  • A goose is flying south for the winter at a constant speed. Keep in mind that one mile is 1.61 km, and one pound is 454 g.The go
    11·1 answer
  • 3. What are vaccines? Are there different types?​
    5·2 answers
  • Which type of prevailing wind would carry more water vapor (humidity)? (Choose one)
    13·1 answer
  • Which best explains the difference between a monomer and a polymer?
    15·2 answers
  • Which sentence is a scientific statement?
    10·2 answers
  • Why does oxygen exist as a diatonic molecule and not simply the O atom
    8·1 answer
  • After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Ins
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!