Can someone how to do these problems!!
Answers
pH=14-pOH
pOH=-log[OH⁻]
a) pOH=-log10⁻¹²
pOH=12
pH=14-12
pH=2
You can also use these equations:
[H⁺]=K(w)/[OH⁻] (K(w)=1.01×10⁻¹⁴)
pH=-log[H⁺]
b) [H⁺]=(1.01×10⁻¹⁴)/10⁻²M
[H⁺]=1.01×10⁻¹²M²
pH=-log(1.01×10⁻¹²)
pH=12
You can use either method. It does not really matter.
I hope this helps. Let me know if anything is unclear and when you do the calculations for c you should get pH=7.
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You spot a friend walking on a moving walkway in an airport. You are not on the walkway and you want to keep up with her.At what speed do you need to walk?A. the speed of the walkway multiplied by the speed at which she is walkingB. the speed of the walkway minus the speed at which she is walkingC. the speed of the walkway plus the speed at which she is walking
compared to the melting points of ionic compounds, the melting point of molecular solids tend to be...
double-replacement reaction.
c.
replacement reaction.
b.
decomposition reaction.
d.
combustion reaction.
Answers
Final answer:
The equation A + BX = AX + B represents a single-replacement or displacement reaction in Chemistry, where a more reactive element replaces another in a compound to form a new compound and releases the displaced element.
Explanation:
The equation A + BX = AX + B is a representation of a general single-replacement reaction, also known as a displacement reaction in Chemistry. In this type of reaction, a more reactive element (in this case represented by A) displaces or replaces another element (represented by B) in a compound, resulting in a new compound and a separate element as products. Here, A replaces B in the compound BX, leading to the formation of the new compound AX and the release of element B.
Learn more about Single-replacement Reaction here:
#SPJ12
Answers
Answer: Option (2) is the correct answer.
Explanation:
Electrolytes are the species that contain electric charges and are present as ions in a solution.
We can also say that ionic substances act as an electrolyte in a solution because ionic compounds have the ability to dissociate into ions.
For example,
and dissociate completly into ions when dissolved in wateror polar solvent.
Thus, we can conclude that out of the given options, HCl and NaOH is the pair of formulas represents two compounds that are electrolytes.
approximate molecular mass of this gas?
A 30 grams
B 40 grams
C 20 grams
D 48 grams
Answers
Answer:
30 grams
Explanation:
I got 40 wrong so I picked 30
Answer:
30 grams
Explanation:
I did the ck12
Answers
4 would be the charge.
did this help?
Answers
KE = mv²/2
m=2*KE/v²
v=50 m/s
KE=500J
m=2*KE/v² =2*500/50²=1000/2500= 0.4 kg
Answers
Answer: 2.93 L
Explanation:
AI-generated answer
To find the volume occupied by 0.108 mol of helium gas at a pressure of 0.909 atm and a temperature of 306 K, we can use the ideal gas law equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Rearranging the equation to solve for V:
V = (nRT) / P
Plugging in the given values:
n = 0.108 mol
R = 0.0821 L·atm/(mol·K) (the ideal gas constant)
T = 306 K
P = 0.909 atm
V = (0.108 mol * 0.0821 L·atm/(mol·K) * 306 K) / 0.909 atm
Calculating this expression, we find that the volume occupied by 0.108 mol of helium gas at a pressure of 0.909 atm and a temperature of 306 K is approximately 2.93 L.
Now, let's consider the second part of the question: Would the volume be different if the gas was argon (under the same conditions)?
The volume would be the same for argon gas.
According to the ideal gas law, at the same temperature, pressure, and number of moles, the volume occupied by a gas is the same regardless of the gas's identity. Therefore, if we replaced helium gas with argon gas while keeping the same conditions of pressure, temperature, and number of moles, the volume occupied by argon gas would be the same, approximately 2.93 L.