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
Related Questions
Which of the following changes is observed when we move across the row from left to right in the periodic table?
Classify each type of matter as an element, a compound, a heterogeneous mixture, or a homogeneous mixture. drag each item to the appropriate bin. sugar air hot tea salt water
Which statements correctly describe the decay rates of radioactive isotopes? a} It takes two half-lives for a sample to fully decay. b} The exact time when an individual atom will decay can be accurately predicted. c} After each half-life, the amount of radioactive material is reduced by half. d) All radioactive isotopes have the same half-life. e} The decay of individual atoms in a sample of radioactive material is random.
Given these reactions, X ( s ) + 1 2 O 2 ( g ) ⟶ XO ( s ) Δ H = − 668.5 k J / m o l XCO 3 ( s ) ⟶ XO ( s ) + CO 2 ( g ) Δ H = + 384.3 k J / m o l what is Δ H for this reaction? X ( s ) + 1 2 O 2 ( g ) + CO 2 ( g ) ⟶ XCO 3 ( s )
Answers
Answer: D
Explanation:
Km value is a signature of the enzyme. It is the characteristic feature of a particular enzymes for a specific substrate. Km denotes the affinity of the enzyme for substrate. The lesser the numerical value of Km, the affinity of the enzyme for the substrate is more.
In the velocity x substrate graph in a fixed quantity if enzyme. As substrate concentration is increase, the velocity is also increasing at the initial phase but the curve fatten afterwards. This is because as more substrate is added, all enzymes molecules become saturated. Further increase in substrate cannot make any effect in the reaction velocity.
The maximum velocity is called Vmax. Km is the concentration of substrate that Vmax is half.
The larger the numerical value of Km, the lesser the enzyme binds the substrate
Answers
Answer:
Based on the difference in solubility one can perform the process of purification of the benzoic acid contaminated with sodium chloride. The benzoic acid does not get soluble in cold water, while the sodium chloride is soluble in cold water.
Thus, for separation, the supplementation of cold water can be done into the mixture in the experiment of purifying benzoic acid from sodium chloride. In the process, the mixture is placed on the ice bath and is stirred well, in the end, the solution is filtered. The filtrate contains sodium chloride and on the filter paper pure benzoic acid is collected.
Answers
anonymous 5 years ago
First you chlorinate it in presence of light.
C2H6 + Cl2 ---hv -> C2H5Cl + HCl
Then you add aqeuos KOH to get C2H5OH
C2H5Cl+KOH-> C2H5OH+ KCl.
Then you add KMnO4 to get the rquired compound.
C2H5OH ----KMnO4 ---> CH3COOH.
Answers
Answer:
Unsweetened tea
Explanation:
A concentrated solution is a solution that has more of the solute in it than the solvent (water).
A diluted solution is a solution that has more solvent (water) than the solute.
From the above we can say that the sweet tea contains more of the tea than water i.e it is concentrated hence, the taste is sweet. On the other hand, we can say that the unsweetened tea contains more water than the tea i.e it is diluted hence, the unsweetened taste.
Answers
Answer:
Average atomic mass = 19.9 amu
Explanation:
Isotopes can be defined as two or more forms of a chemical element that are made up of equal numbers of protons and electrons but different numbers of neutrons.
Generally, the isotopes of a chemical element have the same chemical properties because of their atomic number but different physical properties due to their atomic weight (mass number).
Given the following data;
Relative abundance of Z-19 = 55%
Relative abundance of Z-21 = 45%
Atomic mass of Z-19 = 19 amu
Atomic mass of Z-21 = 21 amu
To find the average atomic mass;
Average atomic mass = 19 * (55/100) + 21 * (45/100)
Average atomic mass = 19*0.55 + 21*0.45
Average atomic mass = 10.45 + 9.45
Average atomic mass = 19.9 amu
Therefore, the average atomic mass for element Z is 19.9 amu.
Answers
Answer:
Rate of reaction will be half of it's initial value
Explanation:
For the given reaction, the rate law is -
Where k is rate constant, [1-iodo-2-methylbutane] is concentration of 1-iodo-2-methylbutane and is concentration of
Here nucleophile is the ion
Initiallly,
When concentration of is halved then-
So rate of reaction will be half of it's initial value