3 years ago

Conclusion definition pls?

Chemistry

1 answer:

irina1246 [14]3 years ago

6 0

The end or finish of an event or process

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Elements in the 2nd family/group gain or lose electrons? *

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They lose electrons

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When naming ionic compounds the ______________ is named first.

grandymaker [24]

The answer is metal. Metals are always named first in ionic compounds, like KNO3 for example. I hope this helps!

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Two 10g blocks, one of copper and one of iron, were heated from 300 K to 400K (a temperature difference of 100 K).

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1) 385 J

2) 450 J

Explanation:

The amount of energy that must be absorbed by a certain substance in order to increase its temperature by $\Delta T$ is given by the equation:

$Q=mC\Delta T$

where

m is the mass of the substance

C is its specific heat capacity

$\Delta T$ is the increase in temperature of the substance

For the block of copper in this problem, we have:

m = 10 g is the mass

$C=0.385 J/gK$ is the specific heat capacity of copper

$\Delta T=400-300 = 100 K$ is the change in temperature

So, the energy absorbed by the block of copper is

$Q=(10)(0.385)(100)=385 J$

Similarly for the block of iron, the energy absorbed by the iron is given by

$Q=mC\Delta T$

where

m is the mass of the block of iron

C is its specific heat capacity of iron

$\Delta T$ is the increase in temperature of the block

Here we have:

m = 10 g is the mass of the block

$C=0.450 J/gK$ is the specific heat capacity of iron

$\Delta T=400-300 = 100 K$ is the change in temperature

So, the energy absorbed by the block of iron is

$Q=(10)(0.450)(100)=450 J$

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What is the mass of 1.84 mol NaCl? Give your

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Answer:

108 g

Explanation:

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According to the law of conservation of mass, the total mass of the reactants is

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is equal to the total number of products

Explanation:

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