To know if the solutions are isotonic, hypertonic or hypotonic, we have to determine the osmotic pressure of each solution.
P = iMRT
where
i is the number of ions dissociated for strong electrolytes
M is the molarity
R is the universal gas constant
T is the absolute temperature
For 0.15 M CaCl₂, i = 3 (1 for Ca⁺ and 2 for Cl⁻).
P = (3)(0.15)RT= 0.45RT
For 0.15 NaCl, i = 2 (1 for Na⁺ and 1 for Cl⁻).
P = 2(0.15)RT = 0.3RT
Therefore, the P for CaCl₂ is GREATER than the P for NaCl. <em>Hence, the CaCl₂ solution is hypertonic.</em>
<u>Step 1- Find each element's molar mass:</u>
K=39.1, Cr=52, O=16
<span><u>Step 2-Multiply by their subscripts:</u>
</span> K=39.1*2=78.2
Cr=52*1=52
O=16*4=64
<span><u>Step 3-Find the molecule's molar mass:</u>
</span> 78.2+52+64= 194.2
<u>Step 4- Divide each element's mass by the </u><span><span><u>molecule's:</u>
</span> K: </span>78.2/194.2= 40.3%
Cr: 52/194.2=26.8%
O: 64/194.2=32.9%
<em>(if this helped, can I get Brainliest? Competing against a friend. Thanks!)</em>
Answer:
Over hundreds of years
Explanation:
Just did the test and got it right
Answer:
1 g of Carbon
Explanation:
This is because because carbon has lower molar mass than thorium or copper so a 1-g sample of carbon contains more atoms than 1 g of cobalt or lead.
Answer:
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule.
The molecular formula of the given compounds are:
- CaSO4
- Na₂CO₃
- H2O
- CO2
- KNO3
- NH4Cl
