Jonathan used the following soil triangle to identify a sample of soil as sandy clay. Which description of soil likely allowed J
onathan to make this identification.
A. Mostly large grains, with a sticky texture, 55% sand, 40% clay, 5% silt.
B. Mostly large grains, with a gritty texture, 45% sand, 5% clay, 45% silt.
C. Mostly small grains, with a smooth texture, 30% sand, 5% clay, 65% silt.
D. Mostly small grains, with a sticky texture, 30% sand, 50% clay, 20% silt.
A. Mostly large grains, with a sticky texture, 55% sand, 40% clay, 5% silt.
B. Mostly large grains, with a gritty texture, 45% sand, 5% clay, 45% silt.
C. Mostly small grains, with a smooth texture, 30% sand, 5% clay, 65% silt.
D. Mostly small grains, with a sticky texture, 30% sand, 50% clay, 20% silt.
1 answer:
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The answer for the following problem is mentioned below.
- <u><em>Therefore number of molecules(N) present in the calcium phosphate sample are 19.3 × 10^23 molecules.</em></u>
Explanation:
Given:
mass of calcium phosphate ( ) = 125.3 grams
We know;
molar mass of calcium phosphate ( ) = (40×3) + 3 (31 +(4×16))
molar mass of calcium phosphate ( ) = 120 + 3(95)
molar mass of calcium phosphate ( ) = 120 +285 = 405 grams
<em>We also know;</em>
No of molecules at STP conditions() = 6.023 × 10^23 molecules
To solve:
no of molecules present in the sample(N)
We know;
N÷
=
N =(405×6.023 × 10^23) ÷ 125.3
N = 19.3 × 10^23 molecules
<u><em>Therefore number of molecules(N) present in the calcium phosphate sample are 19.3 × 10^23 molecules</em></u>