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Nikolay [14]
3 years ago
10

Passive prosthetics came about to meet what need?

Chemistry
1 answer:
ss7ja [257]3 years ago
4 0

Answer:

c.............. ......

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A solution of water (kf=1.86 ∘c/m) and glucose freezes at − 2.15 ∘c. what is the molal concentration of glucose in this solution
Reil [10]
<span>1.16 moles/liter The equation for freezing point depression in an ideal solution is ΔTF = KF * b * i where ΔTF = depression in freezing point, defined as TF (pure) â’ TF (solution). So in this case ΔTF = 2.15 KF = cryoscopic constant of the solvent (given as 1.86 âc/m) b = molality of solute i = van 't Hoff factor (number of ions of solute produced per molecule of solute). For glucose, that will be 1. Solving for b, we get ΔTF = KF * b * i ΔTF/KF = b * i ΔTF/(KF*i) = b And substuting known values. ΔTF/(KF*i) = b 2.15âc/(1.86âc/m * 1) = b 2.15/(1.86 1/m) = b 1.155913978 m = b So the molarity of the solution is 1.16 moles/liter to 3 significant figures.</span>
7 0
3 years ago
What is the name of Se2Cl7?
Monica [59]

Answer:

diselenium heptachloride

Explanation:

Se2Cl7

Se = selenium

Cl = chlorine

Don't forget the "-ide"

Diselenium heptachloride

4 0
3 years ago
For which of the following is heat energy absorbed?
Dvinal [7]
Your answer is sublimation.

8 0
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Elements in Group 4A
steposvetlana [31]

Answer:

helium hydrogen

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lithium beryllium bottom carbon

6 0
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Which of these is a chemical property of a substance? texture ductility reactivity conductivity
beks73 [17]

Reactivity is a chemical property of a substance. According to EPA regulations, it is normally unstable and readily

undergoes violent change without detonating. it can explode or violently react when exposed to water, when heated, or under STP.

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