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Y_Kistochka [10]
3 years ago
8

I NEED HELP WITH MY SCIENCE ASAP PLS SOMEONE HELP FAST!

Chemistry
1 answer:
g100num [7]3 years ago
5 0

Answer:

Astatine

Atomic #: 85

Protons: 85

Neutrons:125

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If 5.0 moles of C3H8 react, how many molecules of water are formed?
Lady_Fox [76]
 <span>Propane is C3H8 

The balanced equation is: 
C3H8 + 5 O2 --> 3 CO2 + 4 H2O 
From the balanced equation you can see that for each mole of C3H8 you obtain 4 moles of H2O. 

moles H2O = 5.0 moles C3H8(4 moles H2O/1 mole C3H8) = 20 moles H2O formed 

Use Avogadro's number to find the number of molecules. 
molecules H2O = 20 moles H2O(6.02 x 10^23 molecules/1 mole) = 1.20 x 10^25 H2O molecules</span><span>
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4 years ago
How much heat (in joules) is required to completely melt 10.00 g of ice starting at 0 oc?
Yuri [45]
/////// 400 cal ///////
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Which type of bonding is found in all molecular substances?
Dmitrij [34]
The answer is covalent bonding. Molecular compounds are made of 2 or more nonmetals, and are therefore covalent. That is why another name for "molecular compound" is "covalent compound".
Answer: (1) covalent bonding

Hope this helped!! :D

4 0
3 years ago
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Which type of bond is a result of the sharing of electrons between two more atoms?
Hatshy [7]

Answer: Covalent Bond

Explanation:

Covalent bond is the type of chemical bond between two atoms that are connected to each other by the sharing of two or more electrons. example is the bond between Dinitrogen

8 0
3 years ago
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2. Describe How are the two forms of energy<br> carried by waves and matter related?
Kazeer [188]

Answer:

the energy of matter implies the motion of masses and the energy of the wave has no moving masses

The energy of the particles (matter) is the ability to do some work, therefore the energy can be of motion in the form of kinetic energy or in a configuration of the system called potential energy, the sum of these two energy is constant .

The wave is formed by a disturbance of the medium by matter, therefore for the formation of the wave matter supply energy, for example: in the form of movement, in the form of fluctuation of electric or magnetic field, etc.

The waves after being formed can move away from the matter that formed them, transporting the energy that alternately has kinetic and potential energy, but the total energy is constant.

Therefore the energy in matter is due to the movement of the same and the energy in the wave does not require the movement of matter, so it is a more efficient way of doing work.

In conclusion, the energy of matter implies the movement of masses and the energy of the wave has no moving masses.

7 0
3 years ago
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