A.) baking soda is the answer
The equation is:
Ca(OH)₂(s) + 2 HCl(aq) → CaCl₂(aq) + 2 H₂<span>O(l)
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n=mass in g/M.M
15 g Ca(OH)₂ is n=15 g/ 74.1 g/mol=0.2024 mol of Ca(OH)₂
no. of mol of HCl:
n=0.5 mol/L*0.075L=0.0375 mol
This could react with 0.0375/2= 0.01875 mol of Ca(OH)₂ We have a lot more than that.
Therefore, HCl is the limiting reagent and determines how much CaCl₂ forms.
Based on the balanced reaction, 2 moles of HCl gives 1 mole of CaCl₂
no. of mol of CaCl₂= 0.0375/2= 0.01875 mol
mass in g=n*MM= 0.01875*111= 2.08 g
B. sit in the sun
they are cold blooded so they feel how their skin feels
Options:
A reverse phase TLC plate because the nonpolar stationary phase will interact with polar compounds more strongly.
A normal phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.
A reverse phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.
A normal phase TLC plate because the nonpolar stationary phase will interact with nonpolar compounds more strongly.
Answer:A normal phase TLC plate because the polar stationary phase will interact with polar compounds more strongly.
Explanation:TLC(THIN LAYER CHROMATOGRAPHY) is a solid (stationary phase) and a liquid(mobile phase) technique of separation and purity determination that uses the principle of that different compounds have different adsorption rate and different solubility rate to the two phases between which they are partitioned.
ON A DEVELOPED THIN LAYER CHROMATOGRAPHIC PLATE A PURE COMPOUND WILL APPEAR ONLY ON ONE SPOT.
With TLC one can analyse multiple samples at the same time.
