Take Test Exam 1 - Spri+ V H Student Home take/launch jsp?course QUESTION 25 A c
ID: 1083445 • Letter: T
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Take Test Exam 1 - Spri+ V H Student Home take/launch jsp?course QUESTION 25 A certain mass of carbon reacts with 13.6 g of oxygen to form carbon monoxide How many grams of oxygen would react with that same mass of carbon to form carbon dioxide, according to the law of multiple proportions. O 136 6.80 O 27.2 O 25.6 O 13.6 QUESTION 26 The camera on your phone regularly takes photos that are about 2.15 MB (Megabytes) in size. You periodically save them on an external backup hard drive that has a storage capacity of 800.0 GB (Gigabytes). How many photos will you be able to save to your backup hard drive? Assume nothing takes up space on your external hard drive except your photos. O 372 photos 3.72 10 photos O 3.72·101 photos 269 10% photos O 372.105 photos O 269 photos 26,900 photos O 269 10% photosExplanation / Answer
1)
In CO2 the number of O is double than that in CO
So, for given mass of C, mass of O in CO2 will be double than that required in CO
So, mass of O for CO2 = 2*13.6 g = 27.2 g
Answer: 27.2
2)
total size = 800.0 GB = 800.0*10^9 Bytes
size of 1 image = 2.15 MB = 2.15*10^6 bytes
use:
number of photos = total size / size of 1 image
= (800.0*10^9 Bytes)/(2.15*10^6 bytes)
= 3.72*10^5 photos
Answer: 3.72*10^5 photos
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