Answer:
Answer: (A) 780J
(B) 1.89×10^-11L
(C)1.67×10^-4 h
Explanation:
Energy of the battery = IVt
=13×60 = 780J
Heat combustion of
1g of gasoline relax 46000J
Therefore 780J will release 780/46000
= 0.017g
Density = mass/volume
Volume = mass/density
Volume =0.017× 10^-3 / 900
= 1.89× 10^-8 m3
= 1.89×10^-11 litres
P=IVt
t=P/IV
= 450/60×13
1.67×10^-4 hours
A chemical label should include: a product identifier, signal word, hazard statement, precautionary statement,pictorgrams and supplier information
Explanation:
The product identifier : positioned at the upper left end corner of the label gives the identity of the hazardous chemical by appropriate terms. i.e. the name and code
Signal word: The "Danger" and "WARNING" words. The former is used for a more severe hazard where as the former is for a less severe hazard
Hazard statement : gives a description of the nature and degree of hazard of the chemical
Precautionary statements : Put for workers and users on ways to minimize exposure and lower risks in event of contact with the harmful chemical
Supplier information : It has the chemical manufacturer details such as name, location and telephone number.
Pictograms : Normally symbols with red borders for visual illustration of the hazard chemical.
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Chemical labels : brainly.com/question/3115518
Keywords : chemical, labels
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Answer:
Energy and matter are contained within a closed system.
OH Cool! So.. 9.8 * 90 = 1/2 * 20 ^2 + 9.8 * hc
