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White raven [17]
3 years ago
7

What would you use the scientific method for

Chemistry
2 answers:
ivolga24 [154]3 years ago
3 0
To aquire new knowledge solve and answer problems using methods of investigation
Eddi Din [679]3 years ago
3 0
Http://www.uwyo.edu/scienceposse/research-into-classroom/ecology-background/ecologist-uses-scientific-method.html
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Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time?
Oliga [24]

Answer:

argon

Explanation:

argon inhibits evaporation, and prevents corrosion

6 0
3 years ago
List planets of rocks
irina [24]

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in our solar system, the rocky planets are Mercury, Venus, Earth, and Mars

hope this helps :)

Explanation:

6 0
3 years ago
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Calculate the approximate number of atoms in a bacterium, assuming the average mass of an atom is ten times the mass of a hydrog
mezya [45]

Answer: -

The approximate number of atoms in a bacterium is 10¹¹

Explanation: -

We are given the mass of a bacterium is 10⁻¹⁵ kg.

We are told that the mass of a hydrogen atom is 10⁻²⁷ kg.

Finally we learn that the average mass of an atom of the bacterium is ten times the mass of a hydrogen atom.

Mass of an atom of bacterium = 10 x mass of hydrogen atom

                                                   = 10 x 10⁻²⁷ kg.

                                                   = 10⁻²⁶ kg.

Thus the number of atoms in a bacterium = \frac{Total mass}{mass of 1 bacterium atom}

                                                                      = \frac{10-15 kg}{10-26 kg}

                                                                      = 10¹¹


8 0
3 years ago
What is the volume, in mL, of 0.50 moles of ammonia (NH3) at STP?
blagie [28]
For the purpose we will here use the ideal gas law:

p×V=n×R×T

V= ?
n = 0.5 moleT= 273.15 K (at STP)
p= 101.325 kPa (at STP)
R is  universal gas constant, and its value is 8.314 J/mol×K

Now when we have all necessary date we can calculate the number of moles:
V=nxRxT/p
V=0.5x8.314x273.15/101.325= 11.2 L = 11200 mL

Answer: D.
5 0
3 years ago
Differentiate between Physical and chemical changes​
Marina CMI [18]

Answer:

<em>In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.</em>

<h3> I HOPE THIS WILL HELP YOU IF NOT THEN SORRY HAVE A GREAT DAY:)</h3>

5 0
3 years ago
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