You have three molecules of glucose (3C6H12O6). How many carbon atoms do you have?A. 3
B. 6
C. 18
D. 36
**MY answer: C. 18
Which of the following is a homogenous mixture of two or more pure substances?
A. oxygen
B. water
C. air
D. alcohol
**MY answer: D. alcohol
are they correct???
Answers
Your answer is correct
Which of the following is a homogenous mixture of two or more pure substances?
C. air
Your answer is wrong.
Answer:
1) The correct answer is option C.
2) the correct answer is option C.
Explanation:
1) Molecular formula of glucose =
Number of carbon atoms in single molecule = 6
Number of carbon atoms in 3 molecule of glucose :
of carbon
There are 18 carbon atoms in the 3 molecules of glucose.
2) Homogeneous mixture is the mixture in which components are evenly distributed throughout the mixture. The shape and size of the particles are identical in the mixture.
Heterogeneous mixture is the mixtures in which component are unevenly distributed throughout the mixture. The shape and size of the particles are not identical in the mixture.
Air is the mixture of gases with 78% of nitrogen gas, 21% of oxygen gas and remaining 1 % are other gases. Air is a homogeneous mixture of different gases.
Where as water, oxygen , alcohol are pure substances.
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the equation for calculating density is m÷v
Answers
Molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.
What are molecular compounds?
Any substance made up of similar molecules with atoms from two or more different chemical elements is referred to as a chemical compound. Atoms from more over 100 specific chemical elements, both in their pure forms and when mixed to form chemical compounds, make up all matter in the universe.
For instance, the atoms that make up carbon differ from those which make it up iron, which differ from the ones that make up gold. Molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.
Therefore, molecular compounds often have lower melting and boiling points. Ionic compounds cannot conduct electricity when they are in a solid form.
To know more about molecular compounds, here:
#SPJ2
Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.
.
Answers
Magma, Fossils is the correct answer.
- When a rock turns into magma all the material it contains is destroyed and melted by extreme heat.
- For this reason, igneous rocks don't contain any fossils.
- The term magma represents molten rocks. The heat is so much that it even melts the rocks, so any chances of preserving fossils is negligible.
- Igneous rocks are formed after the cooling and solidification of magma. So it is obvious they can't preserve any previous information before the magma.
Learn more:
Answer: a and c
Explanation:
H2SO4
KOH
H2O
Answers
Answer:
The answer is C.
Explanation:
Because, KOH is the highest PH in the molecule(s).
Answers
mass % = mass hydrogen*100/total mass = 28.8*100/(28.8+171.2) = 14.4%
Answer:
For Edmentum/Plato users, the correct answer is A. 14.4%
decomposition
single replacement
double replacement
Answers
Answer : Option D) Double replacement
Explanation : Double displacement or replacement reactions are those in which the two reactant molecules exchange the cations and anions between them and give a new product.
So, in this case when the reaction is AB + CD → AD + CB
Here, both the species of reactant compound molecule went replacement with the adjacent cation and anion group and formed a new compound or product. Therefore, this can be called as double replacement reaction.