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Rudiy27
3 years ago
13

What are the 5 levels of multicellular organization

Chemistry
1 answer:
yan [13]3 years ago
7 0
Are cells, tissues, organs, organ systems and organisms<span>.</span>
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A compound is 40.0% c, 6.70% h, and 53.3% o by mass. assume that we have a 100.-g sample of this compound. the molecular formula
atroni [7]
<span>When you have 100 g of compound, then based on the percentages given, there are 40.0 g C, 6.70 g H, and 53.3 g O. Convert those to moles:

</span>C: 40.0 g / 12.0 = 3.33 moles of C 
<span>H: 6.70 g / 1.01 = 6.63 moles of H </span>
<span>O: 53.3 / 16.0 = 3.33 moles of O 
</span>
<span>Dividing by the smallest (3.33), we get a C:H:O mole ratio of 1:2:1
</span>So, <span>The empirical formula is CH2O.
Now, </span><span>That formula has a molar mass of [12.0 + 2(1.0) + 16.0] = 30.0

And we are given it's molar mass is = 240

So, no. of units of CH2O = 240 / 30 = 8

</span><span>8 x CH2O = C8H16O8, and that is the molecular formula.
</span>
C_8H_{16}O_8
3 0
3 years ago
Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
Phoenix [80]

Answer: Option (B) is the correct answer.

Explanation:

It is known that for writing a chemical reaction equation, reactants are written on left hand side whereas products are written on right hand side.

And in between reactants and products a forward arrow is placed pointing towards the products.

Therefore, the reaction for carbon burns in the presence of oxygen to give carbon dioxide will be written as follows.

          Carbon + Oxygen \rightarrow Carbon dioxide

Here, carbon and oxygen atoms are the reactants whereas carbon dioxide is the product.

6 0
3 years ago
why was it important to heat your hydrate gently for 5 minutes before heating it strongly for 10 minutes
snow_lady [41]
If the hydrate gets too hot it could start splattering and cause a loss of sample.
6 0
2 years ago
Determine the enthalpy of solution for a solid with δh values as described in each scenario.
IrinaVladis [17]

Answer : To determine enthalpy of solution for a solid with δH values.


One can use the equation as H (reaction) = H (products) - H (reactants)


If δH values are known one can simply substitute them in the above equation and get the enthalpy of the required solution.

8 0
3 years ago
Read 2 more answers
How to find density - PLS BE SIMPLE
dimaraw [331]
Mass divided by volume
8 0
2 years ago
Read 2 more answers
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