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zmey [24]
3 years ago
6

Why Mike the helium balloons float while the others rest on the table

Chemistry
1 answer:
svetlana [45]3 years ago
4 0

Helium is a chemical element of the atomic number 2, an inert gas that is the lightest member of the noble gas series.


These means, Helium is lighter than air, and for this is why all other balloons may not float.


The helium balloon displaces an amount of air (Just like an empty water bottle displaces an amount of water). As long as the weight of the helium plus the balloon fabric is lighter than the air displaces, the balloon will float in the air.

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CO, + H2O –H^2 CO^3 The reaction is which type of chemical reaction?​
gulaghasi [49]

Answer:

Combination reaction or synthesis reaction

Explanation:

Given reaction:

                 CO  +  H₂O  →  H₂CO₃

The type of reaction shown above is a combination or synthesis reaction. A combination reaction is one in which a single product is formed from two or more reactants.

In the given reaction carbon monoxide combines with water to produce hydrogen carbonate.

The formation of compounds from the union of their constituent elements falls into this category of reactions.

4 0
2 years ago
How many moles of oxygen in 3.5 Mols of CH2O
o-na [289]
M of CH2O= 12+2+16=30 g/mol
So 30g/mol = 3.5 mol
=> 16g/mol*3.5 divide by 30 = 1.86 mol
I think
8 0
2 years ago
30 points!!
Lisa [10]

Explanation:

hope this helps you

Mark my answer as brainalist

7 0
2 years ago
Calculate the number of grams of Cl2 formed when 0.115 mol HCl react with O2-
WINSTONCH [101]
The   number  of  grams  of Cl2   formed  when  0.115  moles  of  HCl   react   with  O2  is  calculated  as  follows

write  the  chemical  equation

4HCl  + O2  ----->  2H2O  +  2Cl2


if  0.115  moles  of  HCl  reacted  and from  the  equation  above  the  reacting  ratio  between   HCl  and  Cl2  is  4:2  therefore  the  moles  of Cl2=  0.115  x2/4=0.0575moles

mass  of  Cl2=  moles  x molar  mass  of  Cl2(35.5  x2=71g/mol)

=0.0575  moles  x71g/mol  = 4.0825  grams
4 0
3 years ago
What is the name of the structure that holds the vocal cords?
Fittoniya [83]

Answer:

The answer is larynx. I believe it is anyways. Sorry if i'm wrong.

7 0
3 years ago
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