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3 years ago

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Balancing the following equation. Please use numerical answers

1 answer:

Evgen [1.6K]3 years ago

3 0

This is the answer that is completely drawn out

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Which element is a metalloid?<br> Si<br> Ne<br> Br2<br> Cl2

goldenfox [79]

Answer:

There are 2 answers. A and C

Explanation:

Si is Silicon, which is a metalloid,

Br2 is Bromine, which is a metalloid

3 0

3 years ago

Consider the following reaction: 2 H2(g) + 2 NO(g) → 2 H2O(g) + N2(g) If the concentration of NO changed from 0.100 M to 0.025 M

Wewaii [24]

Answer: The average rate of the reaction during this time interval is, 0.005 M/s

Explanation:

The given chemical reaction is:

$2H_2(g)+2NO(g)\rightarrow 2H_2O(g)+N_2(g)$

The expression will be:

$\text{Average rate of reaction}=\frac{C_2-C_1}{t_2-t_1}$

where,

$C_2$ = final concentration of $NO$ = 0.025 M

$C_1$ = initial concentration of $NO$ = 0.100 M

$t_2$ = final time = 15 minutes

$t_1$ = initial time = 0 minutes

Putting values in above equation, we get:

$\text{Average rate of reaction}=\frac{0.025-0.100}{15-0}$

$\text{Average rate of reaction}=0.005M/s$

Hence, the average rate of the reaction during this time interval is, 0.005 M/s

6 0

3 years ago

For a particular isomer of C8H18, the combustion reaction produces 5113.3 kJ of heat per mole of C8H18(g) consumed, under standa

mart [117]

Answer: The standard enthalpy of formation of this isomer of $C_8H_{18}(g)$ is -210.9 kJ

Explanation:

The given balanced chemical reaction is,

$C_8H_{18}(g)+\frac{25}{2}O_2(g)\rightarrow 8CO_2(g)+9H_2O(g)$

First we have to calculate the enthalpy of formation of $C_8H_{18}$ .

$\Delta H^o=H_f_{product}-H_f_{reactant}$

$\Delta H^o=[n_{CO_2}\times \Delta H_f^0_{(CO_2)}+n_{H_2O}\times \Delta H_f^0_{(H_2O)}]-[n_{O_2}\times \Delta H_f^0_{(O_2)+n_{C_8H_{18}}\times \Delta H_f^0_{(C_8H_{18})}]$

where,

We are given:

$\Delta H^o_f_{(CO_2(g))}=-393.5kJ/mol\\\Delta H^o_f_{(H_2O(g))}=-241.8kJ/mol\\\Delta H^o_f_{(O_2(g)))}=0kJ/mol$

Putting values in above equation, we get:

$-511.3kJ/mol=[(8\times -393.5)+(9\times -241.8)]-[(\frac{25}{2}\times 0)+(1\times \Delta H_f^0_{(C_8H_{18})}$

$\Delta H_f^0_{(C_8H_{18})}=-210.9kJ$

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4 years ago

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What organelle or organelles converts sunlight to chemical energy

sveticcg [70]

It’s the chloroplast

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3 years ago

Graphs are a way to present data in picture form t or f

Irina-Kira [14]

I’m pretty sure it’s true

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3 years ago