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3 years ago

What can you extract from a refinery

Chemistry

1 answer:

Dmitrij [34]3 years ago

4 0

Answer:

i dont know ask the man behind the man

Explanation:

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7. A square chunk of plastic has a length of 5 cm, width of 5 cm and height of 5 cm. It has a mass of 200 g. What is its density

BaLLatris [955]

Answer:

$d=1.6\ g/cm^3$

Explanation:

Given that,

The dimension of a square chunk of plastic is 5 cm × 5 cm × 5 cm

Mass, m = 200 g

We need to find its density

Density = mass/volume

It will form a cube. It volume = side³

So,

$d=\dfrac{200\ g}{5^3\ cm^3}\\\\d=1.6\ g/cm^3$

Hence density is $1.6\ g/cm^3$

5 0

3 years ago

What are sme important facts/info I need to know about Aluminum? Like, is it malleable? I need to know abot this for a science p

grigory [225]

Aluminum is light and is quite unreactive it is malleable and strong too.

6 0

3 years ago

Read 2 more answers

A 1.0l buffer solution contains 0.100 mol of hc2h3o2 and 0.100 mol of nac2h3o2. the value of ka for hc2h3o2 is 1.8×10−5. part a

Mandarinka [93]

There are two ways to solve this problem. We can use the ICE method which is tedious and lengthy or use the Henderson–Hasselbalch equation. This equation relates pH and the concentration of the ions in the solution. It is expressed as

pH = pKa + log [A]/[HA]

where pKa = - log [Ka]
[A] is the concentration of the conjugate base
[HA] is the concentration of the acid

Given:
Ka = 1.8x10^-5
NaOH added = 0.015 mol
HC2H3O2 = 0.1 mol
NaC2H3O2 = 0.1 mol

Solution:
pKa = - log ( 1.8x10^-5) = 4.74

[A] = 0.015 mol + 0.100 mol = .115 moles
[HA] = .1 - 0.015 = 0.085 moles

pH = 4.74 + log (.115/0.085)
pH = 4.87

6 0

3 years ago

David went shopping with his mom for house renovations supplies. They were looking for materials that would conduct electricity.

maxonik [38]

Answer:

this will copper this is correct answer

7 0

3 years ago

Which response includes all the following that are properties of most metals, and no other properties?

oksian1 [2.3K]

Answer:

The correct options are: Z1) They tend to form cations, and Z4) They tend to form ionic compounds when they combine with the elements of Group VIIA.

Explanation:

The chemical elements that have a tendency of losing their valence electrons and are generally present on the left-side of the periodic table are known as metals.

The general characteristics of metals are malleability, ductility, lustre, high thermal and electrical conductivity.

The metals readily lose their valence electrons present in their valence electron shell to form positively charged ions called cations and thus have low ionization energy.

They also tend to form ionic compounds or salts with the reactive non-metals belonging to the Group VIIA of the periodic table.

Therefore, Z1 and Z4 are the properties of most metals.

4 0

3 years ago