Answer:
Silicon is a better conductor of electricity than sulfur. ... Silicon is a solid at room temperature, but argon is a gas. Silicon is less malleable than silver.
Explanation:
Nitrogen makes up 70-80% of the atmosphere. If nitrogen weren't here, we wouldn't be able to breathe in oxygen because of the density of the air and because the air would then be toxic and flammable because there would be too much oxygen in the air. So with nitrogen, we are able to breathe safely. It makes it so we can breathe and keeps the atmosphere at a normal density.
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Answer:
Here the force is 10N and the mass is 5 kg. Dividing both sides by 5kg, we get a = 2 m/s^2.
the mass of aluminum oxide (101.96 g/mol) produced from 1.74 g of manganese(iv) oxide (86.94 g/mol) is 1.36g
The reaction is 3 MnO2 + 4 Al ------ 2Al2o3+ Mn
3 mole of manganese oxide give 2 moles of aluminum oxide so by the reaction n( MnO2)/3 =n(al203)2
the formula is n= mass/M so, now substituting values
m (Al2O3)= m(MnO2) X 2 X M (Al2O3) / M(MnO2 X3
so, by substituting values, 2 X101.96 X1.74g / 3 X 86.94 =1.36g
so mass of aluminum oxide obtained = 1.36g
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