Answers
Answer:
Concentration of KOH = 1.154 M
Explanation:
In the above reaction, 1 mole of oxalic acid reacts with 2 moles of KOH.
Mass of oxalic acid = 0.604 g
Molecular mass of oxalic acid = 90.03 g/mol
1 mol of oxalic acid reacts with 2 moles of KOH
0.0067 mol of oxalic acid reacts with
Volume of the solution = 27.02 mL = 0.0272 L
No. of mole of KOH = 0.0134 mol
Concentration of KOH = 1.154 M
Related Questions
The enthalpy of combustion of acetylene C2H2 is described by C2H2(g) + (5/2) O2(g) →2CO2(g) + H2O(l), Hrxn= –1299 kJ/mol. Calculate the enthalpy of formation of acetylene, given the following enthalpies of formation Hf[CO2(g)] = –393.5 kJ/mol Hf[H2O(l)] = –285.8 kJ/mo
Part D 2ClO2(g)+2I−(aq)→2ClO−2(aq)+I2(s) Drag the appropriate labels to their respective targets. ResetHelp e−→e Superscript- rightarrow ←e−leftarrow e Superscript- Cathode Cathode Anode Anode II Superscript- ClO−2C l O Subscript 2 Superscript- Request Answer Part E Indicate the half-reaction occurring at Anode. Express your answer as a chemical equation. Identify all of the phases in your answer. nothing
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Given the reaction below, how will the concentration of D change if the concentration of B decreases by 0.045 M? 3A(g)+2B(g)⇋2C(g)+5D(g)
Answers
Answer:
K.E. = 5.4362 × 10⁻¹⁹ J
Explanation:
The expression for Bohr velocity is:
Applying values for hydrogen atom,
Z = 1
Mass of the electron () is 9.1093×10⁻³¹ kg
Charge of electron (e) is 1.60217662 × 10⁻¹⁹ C
= 8.854×10⁻¹² C² N⁻¹ m⁻²
h is Plank's constant having value = 6.626×10⁻³⁴ m² kg / s
We get that:
Given, n = 2
So,
Kinetic energy is:
So,
K.E. = 5.4362 × 10⁻¹⁹ J
Answers
Answer:
The concentration is 0.036 mg/mL
Explanation:
Concentration = 0.2 mM = 0.2/1000 = 2×10^-4 M = 2×10^-4 mol/L × 180,000 mg/1 mol × 1 L/1000 mL = 0.036 mg/mL
Answers
Answer: In addition to building texture, starches are used to contribute stability to food products. This often takes the form of holding water. As previously mentioned, gelatinized starch molecules tend to reassociate with one another.
Answers
Answers
Answer:
3.7L
Explanation:
Given parameters:
Initial volume = 5.6L
Initial temperature = 25°C = 273 + 25 = 298K
Final temperature = -78°C = 273 + (-78) = 195K
Unknown:
New volume of the balloon = ?
Solution:
We are going to assume that the pressure is constant and then we apply the charles's law;
"the volume of fixed mass of a gas varies directly as its absolute temperature if its pressure is constant"
mathematically;
=
Where V and T are temperature
1 and 2 are initial and final states
Insert the parameters and solve;
=
298V₂ = 1092
V₂ = 3.7L
Answers
Answer:
The glass cup falling from the counter
Explanation:
the glass isn't changing in any chemical way. it's still made of the same material, just broken apart.
Final answer:
Physical changes involve the alteration of the state or appearance of matter, without changing the composition. An example is solid wax turning into liquid wax when heated, or steam condensing inside a cooking pot.
Explanation:
The question asks for an example of a physical change. Physical changes involve alterations in the state or appearance of matter, without changing its composition. For example, solid wax turning into liquid wax when heated is a physical change. The wax is still the same substance, it's just in a different state. Similarly, steam condensing inside a cooking pot is also a physical change. The water vapor turns back into liquid water, but it's still water. These are distinguished from chemical changes, which transform one substance into a different substance.
Learn more about Physical Change here:
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