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Evgesh-ka [11]
3 years ago
11

Can someone please help me come up with a hypothesis for an experiment?

Chemistry
1 answer:
m_a_m_a [10]3 years ago
5 0
I believe that sugar will desolve the fastest because of the room temperature
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"I think my bike is making a scraping noise because the bearings are not lubricated."
GuDViN [60]

Answer:

B

Explanation:

"I think my bike is making a scraping noise because the bearings are not lubricated."

4 0
3 years ago
Which statements accurately describe mass? Check all that apply.
Alexxandr [17]

Answer:

the second,third and last statement

Explanation:

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PLEASE ANSWER <br> ARE THESE CORRECTTTTTT
Naddik [55]

1. The answer is E.

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3 years ago
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What do scientists fear the effect of continued logging will be on the rain forests??
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5 0
3 years ago
A particular balloon can be stretched to a maximum surface area of 1257 cm2. The balloon is filled with 3.1 L of helium gas at a
lianna [129]

Answer:

P = 0.6815 atm

Explanation:

Pressure = 754 torr

The conversion of P(torr) to P(atm) is shown below:

P(torr)=\frac {1}{760}\times P(atm)

So,  

Pressure = 754 / 760 atm = 0.9921 atm

Temperature = 294 K

Volume = 3.1 L

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

0.9921 atm × 3.1 L = n × 0.0821 L.atm/K.mol × 294 K  

⇒n of helium gas= 0.1274 moles

Surface are = 1257 cm²

For a sphere, Surface area = 4 × π × r² = 1257 cm²

r² = 1257 / 4 × π ≅ 100 cm²

r = 10 cm

The volume of the sphere is :

V=\frac {4}{3}\times \pi\times r^3

Where, V is the volume

r is the radius

V=\frac {4}{3}\times \frac {22}{7}\times {10}^3

V = 4190.4762 cm³

1 cm³ = 0.001 L

So, V (max) = 4.19 L

T = 273 K

n = 0.1274 moles

Using ideal gas equation as:

PV=nRT

Applying the equation as:

P × 4.19 L = 0.1274 × 0.0821 L.atm/K.mol × 273 K  

<u>P = 0.6815 atm</u>

<u></u>

4 0
3 years ago
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