Answer:
Explanation:
E.92
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Answer:
mg3n2 and cacl3 hope it helps
Solution :
Let, intensity at distance 3 m from the acoustic source is
.
We need to find the distance d where the intensity is
.
Now, we know intensity is inversely proportional to square of distance between the source.

Therefore, intensity will be halved at a distance of
.
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Question:
How many atoms are in
1.50g ofAI
Number of Mole:
Generally, the ratio within the total mass of a chemical substance and the molar mass of that chemical substance is utilized to calculate the total number of moles of the substance. The mathematical expression of the number of the mole is shown below,
n=m/M
Here, n is the total number of moles, m is the total mass and M is the total molar mass.
Answer and Explanation:
Given data
The mass of the aluminum is
m =1.50g
Note- The molar mass of the aluminum is
M=26.98g/mol
Since n=m/M
n= 1.50/26.98
n=0.0556
So the answer is A