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Tatiana [17]
3 years ago
5

Help please !!!!!!!!!

Chemistry
1 answer:
Sveta_85 [38]3 years ago
6 0

4 Al(s) + 3 O2(g) ---> 2 Al2O3(s)  

Use dimensional analysis and equation coefficients to convert moles of Al2O3 to moles of O2, to grams of O2:  

[(1.00 mol Al2O3)/1][(3 mol O2)/(2 mol Al2O3)][(31.998 g O2)/(1 mol O2)] =

<em>48.0 g of O2</em>

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Balanced symbol equation for reaction between sodium carbonate solution and dilute sulphuric acid?
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Answer:

The molecular equation for the reaction betweensodium carbonate and sulfuric acid is: 1. Na2CO3(aq)+H2SO4(aq)→Na2SO4(aq)+CO2(g)+H2O(l) N a 2 C O 3 ( a q ) + H 2 S O 4 ( a q ) → N a 2 S O 4 ( a q ) + C O 2 ( g ) + H 2 O ( l ) .

Explanation:

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What past or current environments allowed Nuclear Power to form?
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creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes.

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Nuclear energy produces radioactive waste

A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.

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2 years ago
How many 20.0-g ice cubes are required to absorb 47.0 kJ from a glass of water upon melting?
Sati [7]

Hello!


The number of 20-g ice cubes required to absorb 47 kJ from a glass of water upon melting is 7 icecubes


Why?


We are going to clear from the equation of the released heat, the mass of ice (m). The specific latent heat of fusion of ice is 336 kJ/kg:


Q=m*L\\ \\ m=\frac{Q}{L}=\frac{47 kJ}{336 kJ/kg}=0,1399 kg=139,88 g\\   \\ 139,88g*\frac{1 icecube}{20g}=6,99=7icecubes


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Have a nice day!

3 0
3 years ago
Positive Deviation from Raoult's Law occurs when the vapour pressure of component is greater than what is expected in Raoult's L
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All of the above.

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In positive deviation from Raoult's  Law occur when the vapour pressure of components is greater than what is expected value in Raoult's law.

When a solution is non ideal then it shows positive or negative deviation.

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P^0_A= Vapour pressure of component A in pure form

P^0_B= Vapour pressure of component B in pure form

x_A=Mole fraction of component A

x_B==Mole fraction of component B

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