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pychu [463]
4 years ago
12

IS ANYONE HERE REALLY GOOD AT CHEMISTRY I need help!

Chemistry
1 answer:
Leno4ka [110]4 years ago
7 0
I took Chemistry Honors last year and I can answer some Chemistry Questions, feel free to ask and I'll do my best.
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According to Boyle’s Law, if temperature and number of gas particles are held constant, what happens to the pressure of a system
larisa86 [58]
The pressure increases if the volume decreases
3 0
3 years ago
If 448.85 mg of KOH is dissolved in 400 ml of water, what will be the pH of the solution?
emmasim [6.3K]
I have provided the steps and solution within the attachment. The pH of the solution would be 12.30, this indicates that the solution is basic, as a higher value of pH indicates presence of more hydroxide ions and less of hydrogen ions in the solution.

8 0
4 years ago
Propane burns in air to form water vapor and another gas. What is the volume of the water vapor at 500°C and 1 atm?​
kakasveta [241]

Answer:

253.85 L

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

C₃H₈ + 5O₂ —> 3CO₂ + 4H₂O

From the balanced equation above, 4 moles of water vapor were produced.

Finally, we shall determine the volume of the water vapor produced as follow:

Mole water vapor (n) = 4 moles

Pressure (P) = 1 atm

Temperature (T) = 500 °C = 500 °C + 273 = 773 K

Gas constant (R) = 0.821 atm.L/Kmol

Volume (V) =?

PV = nRT

1 × V = 4 ×0.0821 × 773

V = 253.85 L

Thus, the volume of water vapor obtained is 253.85 L

7 0
3 years ago
Why are hydrogen bonds the strongest of the intermolecular forces?
valentinak56 [21]
The correct answer is c. 
answer b is incorrect <span />
4 0
3 years ago
Read 2 more answers
Holds together Ca²⁺ and SO²⁻₄, Used by C atoms to complete their outermost energy level. __________ Is the main source of attrac
Fudgin [204]

Answer:

The correct answer is a. Hydrogen bonding.

Explanation:

The property by which water molecules attract each other is cohesion. groups of water molecules are formed by this interaction by adhesion with other water molecules.

Hydrogen bridges are great forces that hold water molecules together. They form a compact structure that gives it the property of being an almost incompressible liquid. These weak interactions are formed between a hydrogen with a positive partial charge and a more electronegative atom, such as oxygen.

Have a nice day!

4 0
4 years ago
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