Answer:
Explanation:
Hello there!
In this case, according to this calorimetry problem on equilibrium temperature, it is possible for us to infer that the heat released by the metal allow is absorbed by the water for us to write:
Thus, by writing the aforementioned in terms of mass, specific heat and temperature, we have:
Then, we solve for specific heat of the metallic alloy to obtain:
Thereby, we plug in the given data to obtain:
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Answer:
1000 ml - 1.55M 600 ml - x X 600*1.55/1000=0.93 M
Answer: option C - Carbon and Hydrogen have similar electronegativity values.
Explanation:
Carbon form COVALENT compounds with hydrogen. Examples are methane CH4, ethane C2H6, propane C3H8.
Electronegativity is the power to attract electrons. It is used to predict whether a bond will be covalent OR not. It can also be used to predict if the resulting molecule will be polar or nonpolar
Thus, Carbon with an electronegativity value of 2.55; and Hydrogen with 2.20 shows close similarities and THUS result in NONPOLAR and COVALENT BOND of Propane
Answer:
Explanation:
Hello,
In this case, since the given 5-M concentration of magnesium chloride is expressed as:
We can notice that one mole of salt contains two moles of chloride ions as the subscript of chlorine is two, in such a way, with the volume of solution we obtain the moles of chloride ions as shown below:
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Answer:
1 significant figure:
1000
2 significant figures:
670
0.0093
3 significant figures:
0.184
1.30
4 significant figures:
120.9
1.008
Explanation:
The significant figures of a number written in positional notation are digits that carry meaningful contributions to its measurement resolution. This includes all digits except: all leading zeros.
5 Rules for significant figures:
1: All non-zero numbers ARE significant.
2: Zeros between non-zero numbers ARE significant.
3: Leading zeros are NOT significant.
4: Trailing zeros to the right of the decimal ARE significant.
5: Trailing zeros in a whole number with the decimal shown ARE significant.
Look at the attachments for more examples.
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