Carbon monoxide : mixture, cigarette smoke : element and ice : element ,none of them are correctly matched, therefore option 3 is correct'
Crystalline structures are created when water molecules have been organized in an ordered, cage-like form. Crystalline compounds, such as ice particles as well as water molecules, are composed of particles or molecules which are arranged in a particular order to produce an ordered component known as just a crystalline compound.
Even though it is made up of a chemical link between an atom of carbon and an atom of oxygen, carbon monoxide would be a pure material. There is only one kind of molecule that makes up carbon monoxide, when nothing is physically mixed with that as well.
carbon monoxide = pure substance
cigarette smoke = mixture
Ice = element
Hence, carbon monoxide : mixture, cigarette smoke : element and ice : element ,none of them are correctly matched, therefore option 3 is correct'
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Answer:
Explanation: For example, pH 4 is ten times more acidic than pH 5 and 100 times (10 times 10) more acidic than pH 6. The same holds true for pH values above 7, each of which is ten times more alkaline (another way to say basic) than the next lower whole value.
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Answer:
The two that are true are, "this represents a pure compound in two different states" and "it represents a mixture a solid and a gas".
Explanation:
This two are concluded only from the picture and the use of uniform colors throughout the picture (Showing the same element).
Answer:
X = 27.86°C
Y = 26.11°C
Explanation:
Hello,
To solve this question, we'll need to relate heat energy with specific heat capacity
Q = mc∇T
Q = heat energy
M = mass of substance
C = specific heat capacity of substance
∇T = T2 - T1 = change in temperature of the substance.
For X,
Q = mc∇T
Assuming m = 1 g and Q = 1J
T = 25°C
Q = mc(T2 - T1)
1 = 1 × 0.350 × (T2 - 25)
1 = 0.350T2 - 8.75
8.75 + 1 = 0.350T2
Solve for T2
T2 = 9.75 / 0.350
T2 = 27.86°C
For Z
Assuming Q = 1J and M = 1g
Q = mc∇T
Q = mc(T2 - T1)
1 = 1 × 0.895 (T2 - 25)
1 = 0.895T2 - 22.375
22.375 + 1 = 0.895T2
23.375 = 0.895T2
Solve for T2
T2 = 23.375 / 0.895
T2 = 26.11°C
Since both X and Z have equal mass and same energy was passed through them, the final temperature of X = 27.86°C and Z = 26.11°C
As a general observation, whenever comparing two specific heat capacities of different metals, the metal with the greater value of specific heat capacity would have the lower final temperature while the metal with the lower specific heat capacity would have the higher temperature.