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Oksana_A [137]
2 years ago
12

What is a more modern device that measures mass?

Chemistry
1 answer:
Elanso [62]2 years ago
4 0

Answer:

Digital scales /weight scales (the stuff you weigh yourself to see how much lbs you are)

Explanation:

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You have run an experiment studying the effects of the molecular weight of a compound on the rate of diffusion in agar. Compound
Naddika [18.5K]

Answer:

A) Molecular weight

B) Rate of diffusion

C) Agar plates

Time of diffusion

Explanation:

A) The independent variable is the molecular weight because it is the variable that the researcher changes at will to aid his research. It doesn't depend on other variables.

B) The dependent variable is "Rate of diffusion because it depends on the molecular weight of the compound.

C) A control variable is one that would be held constant throughout the research.

In this case, the agar plates and the time of 2 hours diffusion remain the same throughout.

7 0
2 years ago
In the chemical formula AuCI3, determine the elements and how many atoms of each one are present
Nady [450]
Gold, one 
Chlorine, 13
8 0
3 years ago
Determine the vapor pressure of a solution at 25°C that contains 76.6 g of glucose (C6H12O6) in 250.0 mL of water. The vapor pr
Orlov [11]

Answer:

The vapor pressure of solution is 23.1 Torr

Explanation:

Colligative property of vapour pressure.

ΔP = P° . Xm

ΔP = Pressure of vapour from pure solvent - Pressure of vapour from solution

ΔP = P° - Ps

Xm = mole fraction of solute

Molar weight of glucose: 180 g/m

Moles of glucose = mass / molar weight → 76.6 g / 180 g/m = 0.425moles

If water volume is 250 mL, this volume is occupied by 250 g of solvent.

Density of water : 1g/mL

Molar weight of water: 18 g/m

250 g / 18g/m = 13.89 moles of solvent

Total moles = moles of solute + moles of solvent

0.425 + 13.89 = 14.315 moles

Mole fraction of solute = 0.425 / 14.315 = 0.029

23.8 Torr - Ps = 23.88 Torr . 0.029

Ps = 23.88 Torr . 0.029 - 23.8 Torr ⇒ 23.1 Torr

3 0
3 years ago
¿Qué papel creen que cumplían en sus respectivas sociedades ? es para hoy porfis ayudemeee​
pochemuha

Answer:

I don't know spanish, ask someone else

3 0
2 years ago
Read 2 more answers
Consider the SCl2 molecule. (a) What is the electron config- uration of an isolated S atom? (b) What is the electron con- figura
iragen [17]

Answer:

(a) 1s² 2s² 2p⁶ 3s² 3p⁴

(b) 1s² 2s² 2p⁶ 3s² 3p⁵

(c) sp³

(d) No valence orbital remains unhybridized.

Explanation:

<em>Consider the SCl₂ molecule. </em>

<em>(a) What is the electron configuration of an isolated S atom? </em>

S has 16 electrons. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁴.

<em>(b) What is the electron configuration of an isolated Cl atom? </em>

Cl has 17 electrons. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁵.

<em>(c) What hybrid orbitals should be constructed on the S atom to make the S-Cl bonds in SCl₂? </em>

SCl₂ has a tetrahedral electronic geometry. Therefore, the orbital 3s hybridizes with the 3 orbitals 3 p to form 4 hybrid orbital sp³.

<em>(d) What valence orbitals, if any, remain unhybridized on the S atom in SCl₂?</em>

No valence orbital remains unhybridized.

7 0
3 years ago
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