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
tiny-mole [99]
3 years ago
11

Classify each of these statements as always true, AT, sometimes true, ST, or never true, NT. _____ 1. A mole of a pure substance

contains 6.02 x 1023 atoms. _____ 2. The representative particle of a compound is a molecule. _____ 3. A mole of CCl4 is composed of one atom of carbon and 4 atoms of chlorine. _____ 4. One mole of gas occupies 22.4 L _____ 5. The formula of methane is CH4. If methane contains 75% carbon, then 100 grams of methane contains 25 grams of carbon. _____ 6. The formula for methane CH4 is both an empirical and molecular formula. _____ 7. The empirical formula of C6H12O6 is C2H4O2.
Chemistry
1 answer:
poizon [28]3 years ago
8 0

Answer:

1. AT

2. NT

3. AT

4. ST

5. NT

6. AT

7.ST.

Explanation:

1. AT

This is so because a mole of a pure substance contains that number of atoms at any point in time. The only criterion needed there is if the compound is pure or not.

2. NT.

3.AT

IN CCl4, we have one atom of carbon and 4 atoms of chlorine.

4. ST

This is only true in some instances and not at all times. The relation is only true at s.t.p. It does not hold at other conditions which are not s.t.p

5. NT

Methane contains 75% carbon. It is only right that 100gm methane would contain more than what the hydrogen would have as it has a higher percentage by mass and hence the 25gm is wrong.

6. AT

YES. The molecular formula of methane is also it's empirical formula

7. ST

This is not always true as we have more than one way in which the outside multiple n can multiply the inner numbers to yield the molecular formula. In the case quoted above, n = 3. Analysis can also show that n = 6 in which case the empirical formula would be CH2O.

You might be interested in
Please help me with chemistry
Murljashka [212]

Answer:

60.052 g/mol (molar mass of vinegar)

84.007g/mol (baking soda )

7 0
2 years ago
Draw the Lewis structure for carbonate
Nadusha1986 [10]
There you go try that out.

8 0
2 years ago
Which of the following describes experiences initiated spontaneously by children as they go about their daily activities?
Harlamova29_29 [7]

Answer:

naturalistic

Explanation:

4 0
2 years ago
A hardware salesman measures the mass of a box containing
sattari [20]

Step 1

<u>find the mass of a single washer</u>

Divide the total mass by the number of washers

\frac{0.4168}{1000} =0.0004168\ Kg

0.0004168kg=4.168*10^{-4} kg

Step 2

<u>Convert kg to mg</u>

we know that

1 kg=1*10^{6} mg

so

4.168*10^{-4}*10^{6} =4.168*10^{2}mg=416.8 mg

therefore

<u>the answer is</u>

416.8 mg

8 0
3 years ago
Read 2 more answers
3. If all the waves were measured for a period of 5 seconds, which wave had the highest frequency?
Vanyuwa [196]

Answer:

Correct answer is A.

Explanation:

Frequency is the number of oscillations that a wave have per unit time. Since time is measured in seconds, the wave with the highest frequency must register the highest number of oscillation per second. Hence, correct answer is A.

8 0
2 years ago
Other questions:
  • determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy
    8·1 answer
  • What is the ph of an acetic acid solution if 10 drops are titrated with 70 drops of a 0.65 m koh solution? (ka for acetic acid =
    15·1 answer
  • Uranium-236 is ____.
    13·2 answers
  • In nature, rings with ____ carbon atoms are the most abundant
    6·2 answers
  • How many grams of iron metal do you expect to be produced when 325 grams of an 87.5 percent by mass iron (II) nitrate solution r
    10·1 answer
  • Use this condensed chemical structure
    10·1 answer
  • Which if the following is likely to be found in placer deposits
    15·1 answer
  • Help me, I’m bad a science.
    11·1 answer
  • What cause a earthquake
    14·1 answer
  • A typical engagement ring has 0.77 cm^3 of gold. What mass is present?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!