Answer : The correct match is:
(1) → (k)
(2) → (j)
(3) → (f)
(4) → (d)
(5) → (e)
(6) → (g)
(7) → (a)
(8) → (i)
(9) → (l)
(10) → (c)
(11) → (b)
(12) → (h)
Explanation :
Physical property : It is defined as a change in which the identity of substance does not change.
Physical change : It is defined as something observed while keeping the identity of the substance the same.
Homogeneous mixture : It is defined as something made up of at least two different substances and is usually very difficult to separate. Even distribution of particles.
Heterogeneous mixture : It is defined as something made up of at least two different substances and easily separated by physical means. Unequal distribution of particles.
Chemical property : It is defined as something observed by changing the identity of a substance.
Compound : It is defined as a pure substance made up of at leat two different elements.
Matter : It is defined as anything that has matter and takes up space.
Chemical change : it s defined as a change that creates a new substance or compound.
Extensive property : It is defined as a property that change with the amount of matter present.
Mass : It is defined as the amount of matter contained in an object.
Volume : It is defined as the amount of space a substance takes up.
Intensive property : It is defined as a property that does not change with the amount of matter present.
Answer:
The remote control sends low-energy infrared radiation to a light detector on the front of the television
Explanation:
The signal between a remote control and the TV controls consists of pulses of infrared light, which is invisible to the human eye
<span>The vaporization of br2 from liquid to gas state requires 7.4 k/cal /mol.</span>
The number of mole of H in NH₃, given the data is 23.85 moles
<h3>Data obtained from the question</h3>
- Mole of NH₃ = 7.95 moles
- Mole of H in NH₃ =?
<h3>How to determine the mole of H in 7.95 moles of NH₃</h3>
1 mole of NH₃ contains 3 moles of H
Therefore,
7.95 moles of NH₃ will contain = 7.95 × 3 = 23.85 mole of H
Thus, 23.85 mole of H is present in 7.95 moles of NH₃
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Answer:
The maximum number of moles of PH₃ that can be formed is 0.8 moles.
Explanation:
The balanced reaction is:
P₄ + 6 H₂ → 4 PH₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
- P₄: 1 mole
- H₂: 6 moles
- PH₃: 4 moles
The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, you can use a simple rule of three as follows: If by stoichiometry of the reaction 6 moles of hydrogen react with 1 mole of phosphorus, 4 moles of hydrogen will react with how many moles of phosphorus?
moles of phosphorus= 0.667
But 0.667 moles of phosphorus are not available, 0.2 moles are available. Since you have less moles than you need to react with 4 moles of hydrogen, phosphorus will be the limiting reagent.
Then you can apply the following rule of three: if by stoichiometry 1 mole of P₄ forms 4 moles of PH₃, 0.2 moles of P₄ will form how many moles of PH₃?
moles of PH₃= 0.8
<u><em>The maximum number of moles of PH₃ that can be formed is 0.8 moles.
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