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2 years ago

I will give 100 points to anyone who friends me

Chemistry

2 answers:

Annette [7]2 years ago

7 0

Answer:

i doubt that but i'll friend you anyways.. haha

Explanation:

Thanks for the points

kolbaska11 [484]2 years ago

5 0

Answer:

I'm answering this for points

Explanation:

You might be interested in

if kept at a constant temperature, what is the concentration at 865s if the initial concentration was 0.0225M

Anestetic [448]

Answer:

$[SO_2Cl_2]=0.0175M$

Explanation:

Hello!

In this case, considering that the decomposition reaction of SO2Cl2 is first-order, we can write the rate law shown below:

$r=-k[SO_2Cl_2]$

We also consider that the integrated rate law has been already reported as:

$[SO_2Cl_2]=[SO_2Cl_2]_0exp(-kt)$

Thus, by plugging in the initial concentration, rate constant and elapsed time we obtain:

$[SO_2Cl_2]=0.0225Mexp(-2.90x10^{-4}s^{-1}*865s)$

$[SO_2Cl_2]=0.0175M$

Best regards!

8 0

3 years ago

Contour plowing, conservation plowing and crop rotation are ways to __________ soil. a. prevent c. lose b. conserve d. none of t

morpeh [17]

Explanation:

prevent becoz crop rotation means using it by planting the crop according to nuetrients so ur soil is prevented

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3 years ago

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Who discovered phosphate?

iris [78.8K]

Answer:

Hennig Brand

Explanation:

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3 years ago

All scientific ___________ must be based on careful and rational examinations of the facts.

ipn [44]

I think you forgot to give the options along with the question. I am answering the question based on my knowledge and research.All scientific theories must be based on careful and rational examinations of the facts. I hope that this is the answer that you were looking for and it has actually come to your help.

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4 years ago

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One reaction involved in the conversion of iron ore to the metal is FeO(s) + CO(g) → Fe(s) + CO2(g) Use Hess’s Law to calculate

Ugo [173]

Answer:

$\delta H_{rxn} = -66.0 \ kJ/mole$

Explanation:

Given that:

$3FeO_3_{(s)}+CO_{(g)} \to 2Fe_3O_4_{(s)} +CO_{2(g)} \ \ \delta H = -47.0 \ kJ/mole -- equation (1) \\ \\ \\ Fe_2O_3_{(s)} +3CO_{(g)} \to 2FE_{(s)} + 3CO_{2(g)} \ \ \delta H = -25.0 \ kJ/mole -- equation (2) \\ \\ \\ Fe_3O_4_{(s)} + CO_{(g)} \to 3FeO_{(s)} + CO_{2(g)} \ \delta H = 19.0 \ kJ/mole -- equation (3)$

From equation (3) , multiplying (-1) with equation (3) and interchanging reactant with the product side; we have:

$3FeO_{(s)} + CO_{2(g)} \to Fe_3O_4_{(s)} + CO_{(g)} \ \delta H = -19.0 \ kJ/mole -- equation (4)$

Multiplying (2) with equation (4) ; we have:

$6FeO_{(s)} + 2CO_{2(g)} \to 2Fe_3O_4_{(s)} + 2CO_{(g)} \ \delta H = -38.0 \ kJ/mole -- equation (5)$

From equation (1) ; multiplying (-1) with equation (1); we have:

$2Fe_3O_4_{(s)} +CO_{2(g)} \to 3FeO_3_{(s)}+CO_{(g)} \ \ \delta H = 47.0 \ kJ/mole -- equation (6)$

From equation (2); multiplying (3) with equation (2); we have:

$3 Fe_2O_3_{(s)} +9CO_{(g)} \to 6FE_{(s)} + 9CO_{2(g)} \ \ \delta H = -75.0 \ kJ/mole -- equation (7)$

Now; Adding up equation (5), (6) & (7) ; we get:

$6FeO_{(s)} + 2CO_{2(g)} \to 2Fe_3O_4_{(s)} + 2CO_{(g)} \ \delta H = -38.0 \ kJ/mole -- equation (5)$

$2Fe_3O_4_{(s)} +CO_{2(g)} \to 3FeO_3_{(s)}+CO_{(g)} \ \ \delta H = 47.0 \ kJ/mole -- equation (6)$

$3 Fe_2O_3_{(s)} +9CO_{(g)} \to 6FE_{(s)} + 9CO_{2(g)} \ \ \delta H = -75.0 \ kJ/mole -- equation (7)$

$FeO \ \ \ + \ \ \ CO \ \ \to \ \ \ \ Fe_{(s)} + \ \ CO_{2(g)} \ \ \ \delta H = - 66.0 \ kJ/mole$

$\delta H_{rxn} = \delta H_1 + \delta H_2 + \delta H_3$ (According to Hess Law)

$\delta H_{rxn} = (-38.0 + 47.0 + (-75.0)) \ kJ/mole$

$\delta H_{rxn} = -66.0 \ kJ/mole$

8 0

3 years ago