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RideAnS [48]
3 years ago
12

Someone send me a pic of a safety cartoon [drawn] neatly and all it needs is

Chemistry
1 answer:
Slav-nsk [51]3 years ago
4 0
Just make a list of rules and draw it
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I<br> 3. In words, explain what occurs in terms of electrons when<br> beryllium reacts with oxygen
Drupady [299]

Explanation:

On the whole, the metals burn in oxygen to form a simple metal oxide. Beryllium is reluctant to burn unless it is in the form of dust or powder. Beryllium has a very strong (but very thin) layer of beryllium oxide on its surface, and this prevents any new oxygen getting at the underlying beryllium to react with it

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How many hours are in 25 years?
Annette [7]
There are *219,000* hours in 25 years
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Rubbing alcohol or isopropanol can be described by the chemical formula C3H7OH. One milliliter of isopropanol has a mass of 0.76
SVETLANKA909090 [29]

A chemical property of isopropanol : D. Isopropanol is flammable.

<h3>Further explanation </h3>

There are changes that occur in the mater: physical changes and chemical changes

Classification uses the principle of the initial and final state of the substance.

Physical changes do not form new substances, so the properties of the particles remain the same.(size,volume,shape)

Example : boiling and freezing, just change its phase form from liquid to gas or from liquid to solid

 

Chemical changes/reaction form new substances(products) that are different from the initial substances(reactants)

Example : toxic, corroded

So :

  • the physical properties of isopropanol :

<em>mass, density, evaporation</em>

  • the chemical properties of isopropanol :

<em>highly flammable</em>

5 0
3 years ago
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Carbon monoxide is a gas at 0 °c and a pressure of 1.58 × 105 pa. it is a diatomic gas, each of its molecules consisting of one
Hoochie [10]

Given temperature = 0^{0}C = (0^{0} + 273 )K  = 273 K

Pressure = 1.58 ×10^{5} Pa ×\frac{1 atm}{1.01325*10^{5}Pa}

= 1.56 atm

Density =\frac{PM}{RT}

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= 1.95 g/L

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3 years ago
Sharpening a pencil leaves behind pencil shavings. is sharpening a physical or chemical change
IgorLugansk [536]
Physical damage. 

If you burned the pencil, it would be considered chemical. 
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3 years ago
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