Answer: A index fossil is any animal or plant preserved in the rock record of the earth that is characteristic of a particular span of geologic time or environment. A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time.
Explanation:
Answer:
Explanation:
7.706 g of CO₂ will contain 12 x 7.706 / 44 g of C
= 2.1 g of C .
This will be contained in 3.256 g of isopentyl acetate
3.156 g of H₂O will contain 2 x 3.156 / 18 g of H
= .351 g of H
This will be contained in 3.256 g of isopentyl acetate
Rest will be oxygen
amount of oxygen in 3.256 g of isopentyl acetate
= 3.256 - ( 2.1 + .351 )
= .805 g
ratio of C , H , O in isopentyl acetate
= 2.1 g : .351 g : .805 g
2.1 / 12 : .351 / 1 : 0.805 / 16 ratio of moles
= .175 : .351 : .05 ratio of moles
= 3.5 : 7.02: 1
= 7 : 14 : 2
empirical formula of isopentyl acetate
= C₇ H₁₄ O₂ .
Answer : The moles of Ne gas are 46.25 moles.
Explanation :
using ideal gas equation
where,
P = pressure of gas = 45 atm
V = volume of gas = 24.3 L
T = temperature of gas = 
R = gas constant = 0.0821 L.atm/mole.K
n = moles of gas = ?
Now put all the given values in the ideal gas equation, we get:
Therefore, the moles of Ne gas are 46.25 moles.
Metals are generally malleable , they can be hammered or pressed permanently out of shape without breaking or cracking and fusible (able to be fused or melted) and ductile . Metals in general have high electrical conductivity, high thermal conductivity, and high density .
