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3 years ago

What is the symbol for Lithium, Iron, and Helium

Chemistry

2 answers:

jonny [76]3 years ago

8 0

Lithium=li

Iron=Fe

Helium=He

I don't say u must have to mark my ans as brainliest but if u think it has really helped u plz don't forget to thank me....

Lemur [1.5K]3 years ago

4 0

Answer:

lithium symbol=li helium= he and iron =i

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Temka [501]

Answer:

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Explanation:

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3 years ago

If the aluminum block is initially at 25 ∘C, what is the final temperature of the block after the evaporation of the alcohol? As

skad [1K]

Explanation:

The given data is as follows.

Heat of vaporization ( $\Delta H_{vap}$ ) = 45.4 kJ/mol

Specific heat ( $C_{p}$ ) = 0.903 $j/g^{o}C$

Let us assume the alcohol given is $C_{3}H_{8}O$ and its mass is 1.12 g. Also, mass of aluminium block is 73.0 g.

First, calculate the moles of alcohol ( $C_{3}H_{8}O$ ) as follows.

No. of moles alcohol = $\frac{mass}{\text{molar mass}}$

= $\frac{1.12 g}{60.1 g/mol}$

= 0.0186 mol

So, heat absorbed by the alcohol ( $q_{alcohol}$ ) = heat lost by aluminium ( $q_{aluminium}$ )

$n \times \Delta H_{vap}$ = $-m \times C_{p} \times \Delta T$

$0.0186 mol \times 45.4 kJ/mol = - 73.0 g \times 0.903 J/g^{o}C \times (T_{f} - 25^{o}C)$

12.71 = $- (T_{f} - 25^{o}C)$

$T_{f} = 12.3^{o}C$

Thus, we can conclude that the final temperature of the block is 12.3^{o}C[/tex].

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3 years ago

Describe two ways in which gases are similar to liquids in properties

Nadusha1986 [10]

Answer:

they have weak intermolecular forces

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3 years ago

A mutation produces a bright Orange moth in the population of green moths. The moths live ia a green forest would this mutation

Mamont248 [21]

No it will not be passed on. As the question states the moths live in a green forest so the green moths have camouflage, which is a big advantage. But the orange moth doesn’t and will very easily be spotted by predators(will die very soon probably before reaching its reproductive period) thus the mutation wont be passed on.

Hope this helps:)

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3 years ago

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Helga [31]

Answer: 2

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3 years ago