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3 years ago

Explain how to identify a metal from visual observations

1 answer:

4 0

I am a blacksmith, I would know this one. Alright... Aluminum, has a great shine to it, and it looks like silver... Same with tin, except aluminum is super shiny and sleek, while tin has a dull shine to it. Steel, is flat (color-wise), and it has a slight shine to it.
You can find what type of metal it is by color, shine, light reflectance, dullness, and several other properties. Hope I helped you! :)

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What can a criminal do to make the bullet not match the gun hurry plz

Bumek [7]

I’m just going to take a wild guess. I guess you could make sure that the gun isn’t registered under your name or make your own bullets without any labeling??

5 0

3 years ago

the equilibrium constant K for a certain reversible reaction is 1.32 × 10−4. Which of the following is true for the reaction? Th

Mazyrski [523]

Answer:

The reverse reaction is more favourable than the forward reaction. 

Explanation:

The value of equilibrium constant in this case is $1.32 \times 10 ^-^4 (0.000132)$ . A high value of equilibrium constant indicates that the forward reaction is more favourable.

Thus the resultant of the reaction will have higher concentration of products. When the value of equilibrium constant is less the reverse reaction will be more favoured than the forward reaction.

Thus the resultant of the reaction will have more reactants than products. Here equilibrium constant has a very low value which favours reverse reaction.

7 0

3 years ago

Which of the following reactions will not occur as written? Which of the following reactions will not occur as written? Sn (s) +

galben [10]

Answer:I have no idea

Explanation:

Why is this so complex…

6 0

3 years ago

Read 2 more answers

The rotten smell of a decaying animal carcass is partially due to a nitrogen-containing compound called putrescine. Elemental an

balu736 [363]

The empirical formula is $C_2H_6N$ .

Explanation:

Putrescine has the elements like Carbon, Nitrogen and Hydrogen present in them. So in order to determine the empirical formula, we first have to find the number of moles present in the putrescine. As the percentage of C, H and N present in the chemical is given as 54.50%, 13.73% and 31.77%, we assume that 100 g of Putrescine is taken as sample.

Then the mass of C, H and N present in Putrescine will be 54.50 g, 13.73 g and 31.77 g. We know that the molar mass of C is 12 g/mol, H is 1 g/mol and N is 14 g/mol. So divide the mass with the molar mass of the respective elements to determine the number of moles of these elements present in the sample.

$No.\ of\ moles\ of\ C=\frac{\text { Mass of } C}{\text { Molar mass of } C}=\frac{54.50 \mathrm{g}}{12 \mathrm{g} / \mathrm{mol}}=4.54\ moles$

Similarly, the number of moles of H and N present is determined.

$\text { No. of moles of } H=\frac{\text { Mass of } H}{\text { Molar mass of } H}=\frac{13.73 \mathrm{g}}{1 \mathrm{g} / \mathrm{mol}}=13.73 \text { moles }$

$No.\ of\ moles\ of\ N=\frac{\text { Mass of } N}{\text { Molar mass of } N}=\frac{31.77 \mathrm{g}}{14 \mathrm{g} / \mathrm{mol}}=2.27\ moles$

Then the empirical formula can be determined by dividing the number of moles of all elements with the least number of moles that is 2.27.

$\begin{aligned}&\text { No. of atoms of } C=\frac{4.54}{2.27}=2\\&\text { No. of atoms of } H=\frac{13.73}{2.27}=6\\&\text { No. of atoms of } N=\frac{2.27}{2.27}=1\end{aligned}$

So, the empirical formula is $C_2H_6N$ .

3 0

3 years ago

Describe the fate of the edges of two converging crustal plates. One plate is dense

enyata [817]

its the oceam which is blue in color so

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3 years ago