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Blababa [14]
3 years ago
14

a. silicon b. carbon c. beryllium d.chromium

Chemistry
2 answers:
Montano1993 [528]3 years ago
7 0

Answer:

It's a. silicon

Explanation:

zepelin [54]3 years ago
3 0
The answer is silicon because it’s atomic number is 14
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Why is water considered a pure substance?
vodomira [7]
Um i think its A or C
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Which of the Earth’s four spheres is composed of all the water on earth, an dis located on the image above?
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3 years ago
What is the freezing point of a solution that contains 36.0 g of glucose ( ) in 500.0 g of water? ( for water is 1.86°c/m. the m
Marizza181 [45]
Answer: - 1.86°C

Explanation:

The depression of freezing points of solutions is a colligative property.

That means that the depression of freezing points of solutions depends on the number of molecules or particles dissolved and not the nature of the solute.

To solve the problem follow these steps:

Data:

Tf = ?
solute = glucosa (this implies i factor is 1)
mass of solue = 36.0 g
mass of water = 500 g
Kf = 1.86 °/m
mm glucose = 180.0 g / mol

2) Formulas

Tf = Normal Tf - ΔTf

ΔTf = i * kf * m

m = number of moles of solute / kg of solvent

number of moles of solute = mass in grams / molar mass

3) Solution

number of moles of solute = 36.0 g / 180.0 g/mol = 0.2 mol

m = 0.2 mol / 0.5 kg = 1.0 m

ΔTf = i * Kb * m = 1 * 1.86 °C/m * 1 m = 1.86°C

Tf = 0°C - 1.86°C = - 1.86°C

Answer: - 1.86 °C
7 0
3 years ago
Scientists use critical thinking skills throughout the process of research or experimentation. A student notices that their ener
Delvig [45]
The critical thinking step that the student just completed in the situation above is that OF ASKING QUESTION.
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7 0
3 years ago
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