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
AURORKA [14]
3 years ago
14

How much potassium chlorate (KCIO3) must decompose in order to produce 150 grams of oxygen gas (O2)?

Chemistry
1 answer:
horrorfan [7]3 years ago
4 0

Answer:

765.95 grams.

Explanation:

2 moles of KClO3 produce 3 moles of oxygen.

Using molar masses:

2 * 122.545 g of KCLO3  produces 47.997 grams of oxygen.

47.997 g O2 is produced from 245.09 g KCLO3

150 g    ..........................................    150 * 245.09 / 47.997

= 765.95 grams.

You might be interested in
How much heat do you need to raise the temperature of 100g of aluminum from 30 C to 150 C
SVEN [57.7K]

Answer:

Q = 10.8 KJ

Explanation:

Given data:

Mass of Al= 100g

Initial temperature = 30°C

Final temperature = 150°C

Heat required = ?

Solution:

Specific heat of Al = 0.90 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 150°C - 30°C

ΔT = 120°C

Q = 100g×0.90 J/g.°C× 120°C

Q = 10800 J       (10800j×1KJ/1000 j)

Q = 10.8 KJ

4 0
3 years ago
Read 2 more answers
Which statements accurately describe volume? Check all that apply. Volume is a physical property of an object. Volume is measure
Alex17521 [72]

Answer:

- Volume is a physical property of an object.

- One unit of volume is the milliliter.

- Liquids and solids have constant volumes.

Explanation:

5 0
3 years ago
Read 2 more answers
Cryogenics has the potential to be useful in a variety of fields, including medicine. Suppose you have engineered a method to su
tatiyna

Explanation:

It is known that the specific heat capacity of Liver (C_{p}) is 3.59 kJ kg^{-1}.K^{-1}

It is given that :

Initial temperature of Liver = Body temperature = 37^{o}C = 310 K

Final temperature of Liver = 180 K

Relation between heat energy, mass, and change in temperature is as follows.

                        Q = m \times C_{p} \times \Delta T

Now, putting the given values into the above formula as follows.

                    Q = m \times C_{p} \times \Delta T

                    Q = 1.5 kg \times 3.59 kJ/kg.K \times (310 - 180) K

                         =  700.05 kJ

Therefore, we can conclude that amount of heat which must be removed from the liver is 700.05 kJ.

7 0
3 years ago
What is the molar mass of a molecule that contains one sodium atom, one oxygen atom, and one hydrogen atom?
GrogVix [38]

wherears one hydrogen atom has a mass of approximately 1 u ,1 mol of h atoms has a mass of approximately 1 gram and wherears one sodium atom has an approximately 1 gram and one sodium atom have approximate mass of 23 u

7 0
3 years ago
The ages of rocks that contain fossils can be determined using the isotope 87Rb. This isotope of rubidium undergoes beta
AVprozaik [17]

Answer:

Age of rock = 722 million years old

Explanation:

Using the formula; <em>fraction remaining = 0.5ⁿ</em>

where n = number of half lives elapsed.

However, from the given values, fraction remaining = 1.000 - 0.0105

fraction remaining = 0.9895

Substituting in the formula to determine the number of half-lives:

0.9895 = 0.5ⁿ

log 0.9895 = n log 0.5  

-0.0045842 = -0.30103 n

number of half lives elapsed, n = 0.0152

Therefore age of rock = 0.0152 x 4.75 x 10¹⁰ years =  7.22 x10⁸ years

Age of rock = 722 million years old

7 0
3 years ago
Other questions:
  • You are a scientist conducting an experiment on energy transfers. During the reaction you measure a large transfer of heat energ
    13·2 answers
  • How many grams of lead(II) iodide are produced from 6.000 moles of NaI according to the balanced equation: Pb(NO3)2 + 2 NaI à 2
    13·1 answer
  • Why do two isotopes of an element have the same atomic number but different mass numbers?
    11·1 answer
  • 0.00000000082 -<br> scientific notation
    11·1 answer
  • The smallest part of an element that can combine with other elements is an ________.
    7·2 answers
  • Which of the following is commonly used as a sacrificial metal?
    5·1 answer
  • Select the correct answer. Elements Electronegativity aluminum (Al) 1.61 calcium (Ca) 1 carbon (C) 2.55 chlorine (Cl) 3.16 fluor
    11·2 answers
  • Which of the following molecules has one lone pair of electrons?
    5·2 answers
  • What volume would a 23.8 g sample of sulfur dioxide take up if it were stored at STP7
    8·1 answer
  • Electrons must be able to flow through a material in order for the material to conduct
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!