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alina1380 [7]
3 years ago
7

The gold-foil experiment was used to discover which subatomic particle? Question 2 options: electrons protons ==> neutrons (m

y answer)
Chemistry
2 answers:
Gelneren [198K]3 years ago
8 0
Proton, the gold foil experiment indicated that the nucleus has a positive charge.
mart [117]3 years ago
8 0

Answer:Proton, the gold foil experiment indicated that the nucleus has a positive charge.

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Explanation:

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3 years ago
A(n) _____ bond joins these two oxygen atoms. Two oxygen atoms with two electron shells. The atoms share four electrons located
Lisa [10]

Answer:

double covalent bond  

Explanation:

Double covalent bond -

It is the type of interaction observed between two species , which share the electrons in order to attain stability , is referred to as covalent bond.

The shared electrons are referred to as the bonding pairs or the shared pairs .

Stability and completion of the octet is the driving force for the formation covalent bond.

The molecules of the organic compound usually shows this type bonding .

A double covalent bond is the one which have four shared pair of electrons , i.e. two covalent bonds.

Hence , from the question,

Oxygen is capable to show double covalent bond .

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3 years ago
Acetic acid, CH3CO2H, reacts with ethanol, C2H5OH, to form water and ethyl acetate, CH3CO2C2H5. The equilibrium constant for thi
Irina-Kira [14]

Explanation:

The initial concentrations for a mixture :

Acetic acid at equilibrium = 0.15 M

Ethanol at equilibrium = 0.15 M

Ethyl acetate at equilibrium = 0.40 M

Water at equilibrium = 0.40 M

CH3COOH + C_2H_5OH\rightleftharpoons CH_3CO_2C_2H_5+H_2O

Initially:

0.15 M            0.15 M            0.40 M   0.40 M

At equilibrium

(0.15-x)M       (0.15-x) M     (0.40+x) M   (0.40+x) M

The equilibrium constant is given by expression

K_c=\frac{[CH_3CO_2C_2H_5][H_2O]}{[CH_3COOH][C_2H_5OH]}

4.0=\frac{(0.40-x)\times (0.40-x)}{(0.15+x)\times (0.15+x)}

Solving for x:

x = 0.0333

The equilibrium concentrations for a mixture :

Acetic acid at equilibrium = (0.15-x)M = (0.15-0.033) M = 0.117 M

Ethanol at equilibrium = (0.15-x)M = (0.15-0.033) M = 0.117 M

Ethyl acetate at equilibrium = (0.40+x)M = (0.40+0.033) M = 0.433 M

Water at equilibrium = (0.40+x)M = (0.40+0.033) M = 0.433 M

4 0
3 years ago
Briefly explain why the bulk temperature of the water remains low (at room temperature)
elena55 [62]
If the humidity of the room is low, the water that contacts the air directly could evaporate and takes some energy from the bulk thus decreasing its temperature steadily. This allows the water to have a lower temperature.
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