Answer:
A. True
Explanation:
it is possible to identify a hair as originating from a particular body area, the regions of the body that are primarily used in forensic comparisons are the head and pubic areas.
Forensic = the application of scientific methods and techniques to natters investigation by a court of law.
Answer : The amount of heat released is, -121.04 KJ
Solution : Given,
Enthalpy of reaction, 
= -890 KJ
Mass of methane = 6 g
Molar mass of methane = 44 g/mole
First we have to calculate the moles of methane.
The given balanced reaction is,
From the balanced reaction we conclude that
1 mole of methane releases heat = -890 KJ
0.136 moles of methane releases heat = 
Therefore, the amount of heat released is, -121.04 KJ
Answer:
oxygen
Explanation:
I am pretty sure it is that but you should still check
Answer:
249.44g of CaCl2
Explanation:
First, we need to write a balanced equation for the reaction. This is illustrated below:
2AlCl3 + 3Ca —> 3CaCl2 + 2Al
Molar Mass of AlCl3 = 27 + (3x35.5) = 27 + 106.5 = 133.5g/mol
Mass of AlCl3 from the balanced equation = 2 x 133.5g = 267g
Molar Mass of CaCl2 = 40 + (2 x 35.5) = 40 + 71 = 111g/mol
Mass of CaCl2 from the balanced equation = 3 x 111 = 333g
From the equation,
133.5g of AlCl3 produced 333g of CaCl2
Therefore, 100g of AlCl3 will produce = (100 x 333)/133.5 = 249.44g of CaCl2.
Answer:
40
Explanation:
is the answer because the atomic number is also the number or amount of neutrons in a chemical or substance
