Toxaphene is a kind of pesticides used to protect crops specially cotton crops.
It is present in both solid and gas form.
It has a piney odor.
The physical appearance of toxaphene is yellow in colour amber waxy form.
It is an organochloride insecticide.
In 1940 it was manufactured.
It is a different composition of 670 chemicals.
According to questions,
Given,
Mass of toxaphene = 10^-5 gm
Mass of soil = 100 gm
Toxaphene soil concentrations = 10^-5 / 100 = 10^-7 gm/gm
1 gm/gm = 109 ppb
Concentration in units of ppb =10^-7 * 109 ppb = 100 ppb
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I wish I could help but I’m not sure sorry
Answer:
A barometer is an instrument used to measure air pressure and track weather systems. The most common unit of measurement used in barometers is the millibar (mb).
Explanation:
Answer:
2Mg + O₂ ⟶ 2MgO
Explanation:
Step 1. Start with the most complicated-looking formula (O₂?).
Put a 1 in front of it.
Mg + 1O₂ ⟶ MgO
Step 2. Balance O.
We have fixed 2 O on the left. We need 2O on the right. Put a 2 in front of MgO.
Mg + 1O₂ ⟶ 2MgO
Step 3. Balance Mg.
We have fixed 2 Mg on the right-hand side. We need 2 Mg atoms on the left. Put a 2 in front of Mg.
2Mg + 1O₂ ⟶ 2MgO
Every formula now has a coefficient. The equation should be balanced. Let’s check.
<u>Atom</u> <u>On the left</u> <u>On the righ</u>t
Mg 2 2
O 2 2
All atoms are balanced.
The balanced equation is
2Mg + O₂ ⟶ 2MgO
True that in the preindustrial era, settlements were more likely to be near sources of surface water than in the industrial era. The main reason being that during the preindustrial era people were dependent mostly on irrigation. For irrigation people were dependent on surface water. This was the main and basic reason.
