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
Citrus2011 [14]
3 years ago
8

Which observations is the best evidence that unknown liquid X is a composed of only pure substance

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
4 0

Answer:

A substance that is composed only of atoms having the same atomic number is ...  36 grams of an unknown liquid at its boiling point,.

You might be interested in
What can you infer about copper's properties?
tiny-mole [99]

Answer:

good electrical conductor

lustre in appearance

7 0
3 years ago
Brainly is so boring like upgrade it to be better or something
Nikitich [7]

Answer:

ya same here i hope so btw

7 0
3 years ago
How many grams of lead(II) sulfate (303 g/mol) are needed to react with sodium chromate (162 g/mol) in order to produce 0.162 kg
Afina-wow [57]

Answer : The mass of PbSO_4 needed are, 1.515 grams.

Explanation :

First we have to calculate the mole of PbCrO_4.

\text{Moles of }PbCrO_4=\frac{\text{Mass of }PbCrO_4}{\text{Molar mass of }PbCrO_4}=\frac{0.162g}{323g/mole}=0.005mole

Now we have to calculate the moles of PbSO_4.

The balanced chemical reaction will be,

PbSO_4+Na_2CrO_4\rightarrow PbCrO_4+Na_2SO_4[tex]From the balanced chemical reaction, we conclude thatAs, 1 mole of [tex]PbCrO_4 produced from 1 mole of PbSO_4

So, 0.005 mole of PbCrO_4 produced from 0.005 mole of PbSO_4

Now we have to calculate the mass of PbSO_4

\text{Mass of }PbSO_4=\text{Moles of }PbSO_4\times \text{Molar mass of }PbSO_4

\text{Mass of }PbSO_4=0.005mole\times 303g/mole=1.515g

Therefore, the mass of PbSO_4 needed are, 1.515 grams.

6 0
3 years ago
Which of these is NOT a reason that scientists do experiments?
deff fn [24]
Design a new procedure
5 0
3 years ago
Read 2 more answers
A cylinder is labeled \"PENTANE.\" When the gas inside the cylinder is monochlorinated, five isomers of formula C5H11Cl result.
melisa1 [442]

Answer:

a mixture of two these

Explanation:

The number of isomeric monochlorides depends on the structure and number of equivalent hydrogen atoms in each isomer of pentane.

n-pentane has three different kinds of equivalent hydrogen atoms leading to three isomeric monochlorides formed.

Isopentane has four different types of equivalent hydrogen atoms hence four isomeric monochlorides are formed.

Lastly, neopentane has only one type of equivalent hydrogen atoms that yields one mono chlorination product.

Hence the cylinder must contain a mixture of isopentane and neopentane which yields four and one isomeric monochlorides giving a total of five identifiable monochloride products as stated in the question.  

8 0
3 years ago
Other questions:
  • The equilibrium constant of a reaction: A) is not related to the change in free energy of the reaction. B) is the same as the ma
    10·1 answer
  • What substance takes part in an enzymatic reaction, but is unchanged by the reaction?
    12·1 answer
  • Which of the following do you expect to have soil with the highest fertility
    7·1 answer
  • What do they all have the same of ?
    14·1 answer
  • 2.A fisherman in a boat is drinking hot coffee. The large lake below his boat is full of cold water. Which statement is an accur
    5·1 answer
  • Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer indu
    5·1 answer
  • How does a runoff get polluted.
    10·2 answers
  • How many grams are in 0.375 mol KBr?
    14·1 answer
  • Help me real quick !!
    13·1 answer
  • How many valence orbitals does Cl have?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!