How Is a compound different from a mixture?
it is made of one substance
It cannot be made of organic materials
It cannot be broken down
It cannot be separated by a physical change
I don't know
This formula shows the chemical reaction that occurs when the body breaks
down sugar. The products are carbon dioxide and water.
C6H12O6
+ 6O2
6CO2+ 6H2O
How many carbon atoms are needed in this reaction?
1
2
6
12
I don't know
The chemical formula for baking soda is NaHCO3
. How many sodium (Na) atoms are there in one molecule of baking soda?
1
2
3***
4
Which chemical formula shows 2 atoms of iron (Fe) and 3 atoms of oxygen (O)?
FeO3
Fe2O
Fe2O3****
Fe3O2
Please help me, I'm usually well at Science but right now I'm sick, I have a headache,and I'm having a lot of trouble on these questions.
Thanks,
~Anonymous
Wait until you feel better before you try to answer these questions.
Please!
To understand the differences between a compound and a mixture, here's how you can approach it:
1. Composition: A compound is made of two or more different elements chemically combined in a fixed ratio. On the other hand, a mixture is a combination of two or more substances that are physically blended together, and their proportions can vary.
2. Structure: In a compound, the atoms of different elements bond together to form a distinct structure, whereas in a mixture, the substances retain their individual properties and are not chemically bonded.
3. Separation: A compound cannot be separated into its individual components by physical means alone, as it requires a chemical reaction to break the bonds between the atoms. However, a mixture can generally be separated through physical processes like filtration, distillation, or evaporation.
Now, let's move on to the specific questions:
1. In the chemical reaction stated, the formula C6H12O6 represents sugar (glucose). To determine the number of carbon atoms needed, you can count the number of carbon atoms in the formula, which is 6. Therefore, the answer is 6.
2. The chemical formula for baking soda, NaHCO3, contains one sodium (Na) atom in each molecule. Therefore, the answer is 1.
3. Among the given options, Fe2O3 represents two atoms of iron (Fe) and three atoms of oxygen (O). Hence, the correct answer is Fe2O3.
I hope this helps! If you have any more questions or need further clarification, feel free to ask.