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jolli1 [7]
3 years ago
8

Calvin is setting up a model of the solar system. He positions a cardboard sun at one end of a school hallway and Pluto at the o

ther end, 20 m away.
Calvin knows that Pluto is 39.5 AU from the sun and Jupiter is 5.27 AU from the sun
In order to make his model scale, how many meters from the cardboard sun should Calvin place Jupiter? (record your answer to two decimal places or nearest hundredth)
Chemistry
1 answer:
Oduvanchick [21]3 years ago
5 0

Answer:

  2.67 m

Explanation:

We can write the proportion several ways. One of them is ...

  (model to Jupiter)/(Jupiter distance) = (model to Pluto)/(Pluto distance)

  (model to Jupiter)/5.27 = 20 m/39.5 . . . . . fill in the numbers

  (model to Jupiter) = 20 m(5.27/39.5) ≈ 2.67 m

The model of Jupiter should be placed 2.67 meters from the sun.

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Propane is used as a fuel source on many barbeque grills. What is undergoing reduction during the burning of propane while grill
Anni [7]

Answer:

Oxygen

Explanation:

because oxygen is used when making and sustaining a fire.

I think this seems like something is missing from the question

8 0
2 years ago
Find the pH of a 0.100 molar H2C6O6 solution with ka, where KA is equal 8.0×10–5​
lubasha [3.4K]

The pH of the solution is 2.54.

Explanation:

pH is the measure of acidity of the solution and Ka is the dissociation constant. Dissociation constant is the measure of concentration of hydrogen ion donated to the solution.

The solution of C₆H₂O₆ will get dissociated as C₆HO₆ and H+ ions. So the molar concentration of 0.1 M is present at the initial stage. Lets consider that the concentration of hydrogen ion released as x and the same amount of the base ion will also be released.

So the dissociation constant Kₐ can be written as the ratio of concentration of products to the concentration of reactants. As the concentration of reactants is given as 0.1 M and the concentration of products is considered as x for both hydrogen and base ion. Then the

K_{a}=\frac{[H^{+}][HB] }{[reactant]}

[HB] is the concentration of base.

8 * 10^{-5} =\frac{x^{2}  }{0.1}\\\\\\x^{2} = 8 * 10^{-5}*0.1

x^{2} = 0.08 * 10^{-4}\\ \\x = 0.283*10^{-2}

Then

pH = - log [x] = - log [ 0.283 * 10^{-2}]\\ \\pH = 2 + 0.548 = 2.54

So the pH of the solution is 2.54.

4 0
3 years ago
When atoms come together, there is _______ between the negative electrons clouds.
Verdich [7]
I think the answer is ‘repulsion’
7 0
3 years ago
What feature of a chemical equation is used to balance the equation and make sure it obeys the law of conservation of mass?
taurus [48]

Answer:

b) coefficient

Explanation:

Refer to this example:

CH4  +2  O2  →  CO2+  2  H2O

2 is used as a coefficient in this chemical equation.

5 0
2 years ago
Read 2 more answers
Explain how two object create heat went rub quickly
sergiy2304 [10]

Answer:

friction

Explanation:

the resistance that one surface or object encounters when moving over another.

4 0
2 years ago
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