Answer:
The enthalpy change per mole of Mg is (ΔH) = 460 kj mol⁻¹
Explanation:
the total volume of the solution is
100 ml, its mass is (100 ml)(1.0 g ml⁻¹) = 100 g (Density of water 1 g ml⁻¹)
The temperature change is ΔT = 11.1 ∘C
Heat of reaction = Cs × m × ∆T
= (4.18 Jg⁻¹ ∘C⁻¹)(100 g)(11.1 ∘C)
= 4639.8 j = 4.6 kJ
Because the process occurs at constant pressure, ΔH = qP = 4.6 kJ
To express the enthalpy change on a molar basis
Mole of Mg = = 0.01 mol
Thus, the enthalpy change per mole of Mg is ΔH = = 460 kj mol⁻¹
When should lab participants look at the safety data sheet (sds) of a substance--- before using the substance
Which of the following will be found on a safety data sheet?
The SDS includes information such as the properties of each chemical; the physical, health, and environmental health hazards; protective measures; and safety precautions for handling, storing, and transporting the chemical.
Where can safety data sheets be found?
To obtain SDS, get them from the manufacturer. They may be sent with the chemical order (paper copy or e-mail attachment). Otherwise, go to the manufacturer's website and download it or request a copy
What is the purpose of a safety data sheet?
A Safety Data Sheet (formerly called Material Safety Data Sheet) is a detailed informational document prepared by the manufacturer or importer of a hazardous chemical. It describes the physical and chemical properties of the product
Learn more about safety data sheet :
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Answer:True
Explanation:
If a substance is pure, it will have exactly the same density as that reported for that particular substance in standard literature or vary within very narrow limits. Hence we can determine the purity of a gold sample by measuring it's density.
Answer:
GOOD MORNING DIDI be happy
Heterogeneous mixtures are made of different substances that remain physically seperate. An example would be mixing sand and sugar together.
the answer would be soil
The answer is B soil