Answer:
Bug repellent,Number of Bug Bites
Sleep,Number of Score
Exercise,Amount of Weight
Study,Number of Score
Sunlight,Length of plants
Explanation:
Answer:
Advantages of sunlight are .
- it gives us vitamin D
- preventing disease, and promoting good mental health
hope it is helpful to you
Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
Answer:
Number of moles = 0.05 mol
Explanation:
Given data:
Mass of Pb = 10.5 g
Number of moles of Pb = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of Pb is 207.2 g/mol.
Now we will put the values in formula.
Number of moles = 10.5 g/207.2 g/mol
Number of moles = 0.05 mol
Answer:
Explanation:
4NH₃ + 3O₂- --> 2N₂ + 6 H₂O
4 mole 3 moles 2 moles 6 moles
4 moles of NH₃ reacts with 3 moles of oxygen
1.37 moles of NH₃ reacts with 3 x 1.37 / 4 mols of oxygen
corresponding amount of O₂ = 3 x 1.37 / 4 mols
= 1.0275 moles
corresponding amount of N₂ = 2 x 1.37 / 4 moles
= .685 moles
corresponding amount of H₂O = 6 x 1.37 / 4 moles
= 2.055 moles
Given amount of product N₂ = 3.82 moles
corresponding amount of NH₃ = 4 x 3.82 / 2 moles
= 7.64 moles
corresponding amount of O₂ = 3 x 3.82 / 2 moles
= 5.73 moles
corresponding amount of H₂O = 6 X 3.82 / 2 moles
= 11.46 moles .