Answer:
m= 29.645 g
Explanation:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
Symbol:
The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.
Given data:
density of wood = 0.77 g/cm³
volume= 38.5 cm³
mass= ?
Solution:
d= m/v
m= d × v
m= 0.77 g/cm³× 38.5 cm³
m= 29.645 g
The presence of ozone in the troposphere has been considered as pollutant. Thus, option A is correct.
The atmosphere has been divided into five layers based on the availability and the composition of different elements.
<h3>Troposphere</h3>
The troposphere has been the lowest layer of the atmosphere. It has been closed to the earth surface and provides with clouds and maintain weather.
The gases on the troposphere are used by the organisms for living purpose. The ozone has been a harmful gas for living organisms.
Thus, the presence of ozone in the troposphere has been considered as pollutant. Thus, option A is correct.
Learn more about troposphere, here:
brainly.com/question/201658
I think the answer is yellow. Sorry if I got it wrong
The pOH of a solution with [OH] = 9.0 × 107 will be D (6.04).
<h3>What is ph value?</h3>
A ph value is the measure of acidity and the basics of a substance or solution.
Given;
[OH] = 9.0 × 10^7
pOH = - log [OH⁻]
pOH = - log (9.0 x 10⁻⁷)
pOH = 6.0457
Hence, The pOH of a solution with [OH] = 9.0 × 107 will be D (6.04).
Learn more about ph value here;
brainly.com/question/15888398
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It's a black residue consisting of carbon and any remaining ash that's obtained by removing water from animal substances (hope that helped)
