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Marina CMI [18]
4 years ago
12

Which phrases describe a model in science? Check all that apply.​

Chemistry
1 answer:
AfilCa [17]4 years ago
4 0
I would say the first 3
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PLS HELPP DUE TODAY NEED DONE
Zarrin [17]

Answer:

Explanation:

Each coil increases it by a multiple of 100.

=> 50 | 3 | <u><em>15,000</em></u>

=> 100 | 3 | <u><em>30,000</em></u>

=> 150 | 3 | <u><em>45,000</em></u>

3 0
3 years ago
Read 2 more answers
The molar mass of a certain gas is 80.6 g. What is the density of the gas in g/L at STP?
vfiekz [6]
Using the ideal gas equation:
PV = nRT

Substituting n with mass / Mr
PV = mRT/Mr

Density = m/V
So rearranging:
Density = PMr/RT

P = 1 atm
R = 0.082 L atm / K mol
T = 273 K
Density = (1 x 80.6) / (0.082 x 273)
Density = 3.6 g / L
3 0
3 years ago
The reaction of hydrogen and iodine to produce hydrogen iodide has a Kc of 54.3 at 703 K. Given the initial concentrations of H2
pentagon [3]

Answer:

[HI] = 0.7126 M

Explanation:

Step 1: Data given

Kc = 54.3

Temperature = 703 K

Initial concentration of H2 and I2 = 0.453 M

Step 2: the balanced equation

H2 + I2 ⇆ 2HI

Step 3: The initial concentration

[H2] = 0.453 M

[I2] = 0.453 M

[HI] = 0 M

Step 4: The concentration at equilibrium

[H2] = 0.453 - X

[I2] = 0.453 - X

[HI] = 2X

Step 5: Calculate Kc

Kc = [Hi]² / [H2][I2]

54.3 = 4x² / (0.453 - X(0.453-X)

X = 0.3563

[H2] = 0.453 - 0.3563 = 0.0967 M

[I2] = 0.453 - 0.3563 = 0.0967 M

[HI] = 2X = 2*0.3563 = 0.7126 M

3 0
3 years ago
How does hydrogen bonding affect water as it becomes colder and eventually freezes? (1 point)
Sergio039 [100]
The 2nd one I think but I need some points
5 0
3 years ago
What instrument us normally used to measure atmospheric pressure
Anika [276]
The answer is Barometer.
3 0
3 years ago
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