Answer:
Many insects are resistant to pesticides there are many factors that can lead to resistance in the organism.
In the population of mosquitoes some of them carry resistant gene that makes the organism survive even in the presence of pesticide.
This occurs because of mutation that is very rare when it comes to insects. This is the reason that after sometime the mosquito become resistant to pesticides. They are more likely to breed and survive.
Answer:
Venus is made up of a central iron core and a rocky mantle, similar to the composition of Earth
Explanation:
Answer:
225.4 g
Explanation:
The equation of the reaction is;
Zn(s) + FeNiO(s) ------> ZnFeNiO(s)
Since FeNiO is in excess then Zn must be the limiting reactant.
Molar mass of Zn = 65.38gmol-1
Number of moles of Zn reacted = 75g/65.38gmol-1 =1.15 moles
If 1 mole of Zn yields 1 mole of ZnFeNiO
1.15 moles of Zn yields 1.15 moles of ZnFeNiO
Mass of ZnFeNiO produced= 196gmol-1 * 1.15moles = 225.4 g
PH3 looks just like ammonia NH3 with a lone pair and 3 hydrogens in a pyramidal formation.
<span>In PH3 the P has 3 bond pairs and 1 lone pair, (4 total pairs). The shape is called trigonal pyramidal (approximately tetrahedral minus one atom).
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the answer to this question is c