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MissTica
3 years ago
8

when a piece of potassium metal is placed in water a violent reaction occurs. when copper metal is placed in water nothing happe

ns. Is this a physical or chemical property of the metal?
Chemistry
1 answer:
Kitty [74]3 years ago
5 0

Answer:

Chemical Reaction

Explanation:

Copper is a transitional metal, meaning it is much more stable chemically than potassium. Potassium is considered an Alkaline Earth metal meaning it is very unstable and reacts violently. I'm not sure how in depth you have to go but this is just the surface of the explanation.

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What is the pressure in a 5.00 L tank with 49.00 grams of oxygen gas at 350 K? ___atm
ziro4ka [17]

Answer:

The right answer is "8.81 atm".

Explanation:

Given:

V = 5.00 L

Mass = 4900 g

MW = 32 g/mol

T = 350 K

Now,

Number of moles will be:

n = \frac{Mass}{MW}

   =\frac{49.00}{32}

   =1.53125 \ mole

By using the ideal gas equation, we get

⇒ PV=nRT

or,

⇒    P=\frac{nRT}{V}

By substituting the values, we get

           =\frac{1.53125\times 0.0821\times 350}{5.00}

           =\frac{44.1}{5.00}

           =8.81 \ atm  

4 0
3 years ago
What does a TRAAP test stand for
Aleks [24]

Answer:

TIMELINESS, RELEVANCE, AUTHORITY, ACCURACY and PURPOSE.

Explanation:

hope it helps!

7 0
2 years ago
Read 2 more answers
Vaporized water is also known as
viva [34]

Answer:

fog

Explanation:

4 0
2 years ago
You are a researcher for a golf club manufacturer. You are given two identical looking cubes of a metal alloy. You are informed
Rashid [163]

Answer:

C.Melt both cubes and look for a broader range of melting temperatures. The one that melts over a broader range of temperatures is the amorphous solid.

Explanation:

Amorphous solids is one that do not have a fixed melting points but melt over a wide range of temperature due to the irregular shape hence its name. Contrariwise crystalline solids, have a fixed and sharp melting point.

This comes in handy to solve the riddle. We can characterise the pair with the melting point property.

7 0
3 years ago
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Vanyuwa [196]

A. 1.01 is the right answer

Since

The formula is Pv= nRT

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V= 22.4 L

N= x

r= 0.0821

t = 273 k (bc it’s standard temperature)

So (1)(22.4)=(x)(0.0821)(273)

X= 1.001

7 0
3 years ago
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