Answer : The correct answer is ⁶⁴ Zn ₃₀ .
Positron is ⁰e₊₁ particle . When it is absorbed the atomic number increases by 1 but atomic mass remains same . The given nuclide is ⁶⁴ Cu₂₉ . In this atomic mass is 64 and atomic number is 29 .
So when it will absorb one positron the atomic number will increase by 1 that is atomic number = 30 . Since atomic number = 30 is for Zinc atom , so when ⁶⁴ Cu₂₉ absorb one positron it produces ⁶⁴ Zn ₃₀ as resulting atom . The reaction can be written as:
⁶⁴ Cu₂₉ + ⁰e₊₁ → ⁶⁴ Zn ₃₀
<h2 /><h2> Hetero = many and homo = one.</h2>
Explanation:
Heterogeneous:
- In the Heterogenous mixture, the components that are present in the mixture are not distributed uniformly.
- There are two or more than two phases present in a heterogeneous mixture.
- Examples of the heterogeneous mixture are - cereal in milk, gravel, pizza.
while
Homogeneous mixture:
- In Homogeneous mixture, the components that are present in the mixture are distributed uniformly throughout the solution.
- There is only one phase present in a homogenous type of solution.
- Examples of the homogenous mixture are- air, rainwater, steel.
Answer:
C, 3.00 moles
Explanation:
First, balance the equation.
4Al + 3O2 ---> 2Al2O3
From the balanced equation, assuming Al is limiting, the mole ratio of Al:Al2O3 = 4:2 = 2:1,
meaning every 2 moles of Al used, produces 1 mole of Al2O3.
So, since 1.5 moles of Al2O3 is produced,
the no. of moles of Al used = 1.5 x2
= 3.0 moles
= C
Increase the Surface Area of the Reactants. Increasing the surface area of the reactants increases the rate of the reaction. More surface area means more collisions of the reactant molecules and an increased rate of the reaction. This occurs when reactants are made to react in powdered form
Answer:
C
Explanation:
because warmer air lies above the cooler air