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3 years ago

Describe how iron and sulfur can be an element, mixture, and a compound.

1 answer:

8 0

iron is a metal and sulfur is a non-metal and both are in the periodic table which means they are elements. Together they can form a compound with an ionic bond. and can be mixed to form a mixture.

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What is the formula unit for Li and O?

Margarita [4]

The formula unit for Li and O is —————-> Li2O

4 0

2 years ago

A body that weighs 6 Newton on the earth will weighs – on the moon in newton<br>

Sergeeva-Olga [200]

An object on the moon is 1/6 of the weight of an object on Earth

To find the answer to your question, divide the number of N on Earth by 6, 6N / 6 = 1N

Hope this helps!

6 0

3 years ago

Calculate ΔH for the reaction: C(graphite) + 2H 2(g) + 1/2 O 2(g) => CH 3OH(l) Using the following information: C(graphite) +

Alika [10]

Answer:

$\Delta H$ for the given reaction is -238.7 kJ

Explanation:

The given reaction can be written as summation of three elementary steps such as:

$C(graphite)+O_{2}(g)\rightarrow CO_{2}(g)$ $\Delta H_{1}= -393.5 kJ$

$2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(l)$ $\Delta H_{2}= (2\times -285.8)kJ$

$CO_{2}(g)+2H_{2}O(l)\rightarrow CH_{3}OH(l)+\frac{3}{2}O_{2}(g)$ $\Delta H_{3}= 726.4 kJ$

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$C(graphite)+2H_{2}(g)+\frac{1}{2}O_{2}(g)\rightarrow CH_{3}OH(l)$

$\Delta H=\Delta H_{1}+\Delta H_{2}+\Delta H_{3}=-238.7 kJ$

4 0

3 years ago

Which description is a characteristic of a base?

MA_775_DIABLO [31]

I am pretty sure it is B. If it turns litmus paper red it is acidic. The other 2 make no sense.
I might be wrong tho.
Hope that helped☺️

8 0

3 years ago

Read 2 more answers

How are trials used in an experiment?

DENIUS [597]

Answer:Trials are repetitions of the same procedure. These are done for a couple of reasons: To minimize the impacts of errors done in any one trial by averaging multiple trials together. To minimize random effects and the effects of uncontrolled variables by averaging multiple trials together.

Explanation:

7 0

2 years ago