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3 years ago

What is the difference between minerals and rocks?

1 answer:

Natasha2012 [34]3 years ago

7 0

What's the difference between rocks and minerals?A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure formed by a geological processes. A rock is an aggregate of one or more minerals where as a rock may also include organic remains and mineraloids.

I hope this helps

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Describe the profile you would expect for a biological catalyst. Complete the sentences to explain why an enzyme is different th

uysha [10]

Answer:

- When looking at the plot G versus reaction coordinate, the profile for a biological catalyst (e.g. an enzyme) will have about the same transition state(s), with an overall activation energy that is low in comparison to the uncatalyzed reaction.

- Enzymes have a high molecular weight and are organic compounds, while inorganic catalysts often have a low molecular weight and are inorganic compounds.

- When comparing rates, enzymes are typically several times faster than inorganic catalysts.

Explanation:

Enzymes are organic molecules capable of producing a faster chemical reaction. In an enzymatic reaction the transition state -corresponding to the state in which the substrates or products are equally likely- tends to be the same, while the energy required for the reaction decreases.

The differences between an enzyme and an inorganic catalyst are structural and functional:

Enzymes are organic and of high molecular weight and catalysts are inorganic and of low molecular weight.
An enzyme can change its structure during a reaction, while the configuration of a catalyst is the same.
The reaction catalyzed by an enzyme is about 10⁶ to 10¹² times faster than with a catalyst.

5 0

3 years ago

A certain liquid has a normal boiling point of and a boiling point elevation constant . A solution is prepared by dissolving som

PSYCHO15rus [73]

This question is incomplete, the complete question is;

A certain liquid X has a normal boiling point of 150.4 °C and a molar boiling point elevation constant kb is 0.60 °Ckgmol⁻¹.

A solution is prepared by dissolving some urea (NH22CO) in 750 g of X. This solution boils at 150.9 °C . Calculate the mass of urea that was dissolved. Round your answer to 3 significant digits.

Answer:

the mass of urea that was dissolved is 37.5 g

Explanation:

Given the data in the question;

normal boiling point of X; Tb⁰ = 150.4 °C

boiling point of solution Tb = 150.9 °C

Change in boiling point Δt = Tb - Tb⁰ = 150.9 °C - 150.4 °C = 0.5 °C

Kb = 0.6 °C.kg.mol⁻¹

V = 750 g

Now, we know that

Δt = Kb × molality

0.5 = 0.6 × molality

molality = 0.5 / 0.6

molality = 0.833

we know that molar mass of urea is 60 g/mol

molality = mass × 1000 / molar mass × volume( g )

we substitute

0.833 = ( mass × 1000 ) / ( 60 × 750 )

0.833 = ( mass × 1000 ) / 45000

0.833 × 45000 = mass × 1000

mass = ( 0.833 × 45000 ) / 1000

mass = 37485 / 1000

mass = 37.485 ≈ 37.5 g { 3 significance figure }

Therefore, the mass of urea that was dissolved is 37.5 g

8 0

2 years ago

How many oxygen atoms in 2.28 mol HNO3 ?

krek1111 [17]

Formula is moles =massin grams of HNO3/molar mass of HNO3

5 0

2 years ago

Which is true about an invading species?

lys-0071 [83]

B. Has natural predators to limit population

5 0

3 years ago

Read 2 more answers

Given LiCl, NaCl, KCl, MgCl2, and SrCl2, arrange the compounds in order of increasing lattice energy.

Oksanka [162]

Answer:- $KCl$

Explanations:- Lattice energy depends on two factors, charge and size.

High charge and small size gives higher lattice energy where as low charge and bigger size gives lower lattice energy.

in LiCl, NaCl and KCl, the anion is same and also the charges for Li, Na and K are also same. The deciding factor here is the size of cations. Since the size increases as we move down a group, the order of size of these three atoms is Li<Na<K.

The order of lattice energy is exactly opposite as it's increases as the size decreases.

Now, if we look at magnesium chloride and strontium chloride then again the anion is common but the metals have higher charge as compared to the alkali metals(Li, Na and K). So, lattice energy values must be higher for these two compounds. If we compare Mg and Sr then size of Mg is smaller and so the lattice energy would be greater for this.

Hence, the increasing order of lattice energy is $KCl$ .

4 0

3 years ago

Read 2 more answers