How many kilograms are in a 50 pound luggage bag?
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What type of mixture scatters light and cannot be filtered? a colloid, a heterogeneous mixture a solution, a heterogeneous mixture a colloid, a homogeneous mixture a solution, a homogeneous mixture
An inherited behavior or physical characteristics that helps an organism survive and reproduce Natural selection Predation Adaptation Competitionlook at pic thanks :D
The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene?A) C2H4 B) C8H8 C) C10H12 D) C6H6 E) none of these i got C8H8 because i did MWEF=n but it says the answer should be C2H4 how is that possible?
Which sample is a homogeneous mixture?A) NaCI(s) B) NaCl(aq)C) NaCl(g)D) NaCl(ℓ)
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Out of the following given choices;
A. the size of the atoms in a substance
B. the number of molecules in a substance
C. the position of the electrons on the outer valence shells
D. the balance between intermolecular forces and kinetic energy
The answer is D. The kinetic energy of the molecules is determines by the temperatures of the substance. The higher the temperatures, the higher the kinetic energy of the molecules. The molecules subsequently move and collide with higher energies and overcome intermolecular forces. This allows the substance to changes state from solid to liquid and eventually to gas (with increasing kinetic energy).
This is important because by increasing or decreasing a substance's temperature, you are also adding or removing energy from it. And when a substantial amount of energy has been added or removed, a substance can change its state from solid > liquid > gas or the other way around.
a. True
b. False
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Answer: False (b)
Explanation: No two elements can have the same spectrum.
b. the initial temperature of the object
c. the mass of the object
d. all of the above
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The amount of heat transferred from an object depends on all of the above".
What is the amount of heat?
The amount of heat is the amount of energy required to convert one unit mass of a constant volume substance by one degree Celsius.
The heat transported to or from a substance is determined by three factors: the change in temperature of the substance, its mass, and certain physical parameters related to the phase of the substance. The energy required to change the temperature of a substance or object is measured by specific heat and heat capacity. The amount of heat received or emitted by a substance is directly proportional to its type, mass, and temperature change.
Hence the correct answer is d.
Learn more about amount of heat here
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When calculating for the amount of heat in an object, you use the following formula:
q = c x m x ΔT
q = amount of heat or heat
c = the specific heat
m = the mass
ΔT = the initial temp.
- When [S] << Km, the reaction is second order and V0 depends on [S] and [Et].
- Their kcat is a second order rate constant.
- The lower their Km, the better they recognize their substrate, but the lower their reaction rate.
- When [S] << Km, V0 depends on [S] and [Et].
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Answer:
1. True. 2. True. 3. Not true. 4. True. 5. True
Explanation:
1. Yes, because if the amount of substrate i much greater than of competitive inhibitor then the probability of substrate to bind to ferment is much higher than of inhibitor (if we have noncompetitive inhibitor it damages the structure of active site and the substrate concentration does not have a role in reaction rate).
2. Yeah, because then the michaelis-menten equation will transform into [tex} V0=(kcat*[E]*[S])/Km [/tex] and it is a second order equation.
3. No, because it is measured in sec-1 and that means it is 1 rate constant.
4. True, if the lower Km the better is binding and due to that rate is slower because it's harder for substrate to unbind.
5. The same as question two.
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the number of moles of CaCl₂ present - 12 mol
Volume of solution - 3 L
Therefore if 3 L contains 12 mol of CaCl₂
then 1 L of CaCl₂ contains -
Therefore molarity of CaCl₂ is 4 M
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So, half of 96 is 48
half of 48 is 24
half of 24 is 12
half of 12 is 6
96->48->24->12->6
You count how many arrows (->) there is.
Which is 4
Then you use the 12 minutes the question gave you to do:
12 divided by 4
= 3
So, one half-life (Or the time it takes for the radioactive material's mass to decrease in half) is 3 minutes
and every 3 minutes it will decrease by half.