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antiseptic1488 [7]
2 years ago
11

I need a science fair topic and the science fair is in 3 days

Chemistry
2 answers:
vitfil [10]2 years ago
8 0
Electric circuit and electricity conductors are relatively simple to explain
alisha [4.7K]2 years ago
3 0
Make it about volcanos sis
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Determine the empirical formula for a compound that is 36.86% n and 63.14% o by mass. determine the empirical formula for a comp
nexus9112 [7]
<span>Mass of nitrogen = 14.0067
</span> Mass of oxygen = 15.9994
In this compound nitrogen = 36.86 / 14.0067 = 2.63 
<span>And oxygen = 63.14 / 15.9994 = 3.95 <span>
now we have: N----- 2.63 and O----3.95 
by dividing both with the smallest number we get
</span></span> <span>N-------2.63/2.63 = 1<span>
<span>O-------3.95/2.63 = 1.5
To get whole numbers we multiply both by 2
</span></span></span> N= 1 x 2 = 2 And O = 1.5 x 2= 3
<span>So, the empirical formula is N</span>₂O₃.
5 0
3 years ago
A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reac
sveta [45]
The answer is <span>increasing the surface area of Fe(s) and increasing the concentration of HCl(aq). 

the rate of reaction can be increased if the interaction between the reactants in better. by increasing the surface area of a solid, such as Fe, you make more possible each molecule of Fe to interact with HCl. Also, by increasing the concentration of HCl, it mean there is more molecule of HCl to interact with Fe.</span>
6 0
3 years ago
The amount of water vapor in a given volume of air is ______________ .The amount of water vapor in the air at any one time depen
Eduardwww [97]

Answer:

The amount of water vapor in a given volume of air is humidity.The amount of water vapor in the air at any one time depends on temperature . Warmer air holds more water than cooler air. Clouds form when humidity is low and thetemperature is high . Relative humidity is defined as the amount of water vapor in the air divided by the amount that would have to be present in the same air to form a cloud or condense on a surface. Dew is related to the humidity of the previous day. The air temperature at which water vapor in the air condenses onto cool surfaces is the dew point.

Explanation:

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2 years ago
Which element is very toxic and reactive green gas?
yawa3891 [41]
I would answer this but i have to go to bed i have a reading test tommorow
3 0
2 years ago
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How can one describe the bond between the two atoms of hydrogen to the one atom of oxygen within a molecule of water (h2o)?
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There are O-H bonds in H2O. They have the intramolecular force of polar covalent bond.

4 0
3 years ago
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