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4 years ago

Why do we consider diamonds a kind of metamorphic rock?

1 answer:

6 0

This is because the minerals that make up the rocks form only at certain temperatures and pressures. At high temperatures or pressures, the elements will rearrange their crystal structure to form a different mineral. Graphite and diamond are two minerals that are both made entirely out of carbon.

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Suppose you need 7.0 m of Grade 70 tow chain, which has a diameter of 38" and weighs , 2.16/kgm to tow a car. How would you calc

STatiana [176]

Answer : The mass of 7.0 m chain is, 15.12 kg

Explanation :

As we are given that,

The weight of the chain per unit length = 2.16 kg/m

Now we have to determine the mass of chain for 7.0 m length.

As, the mass of 1 m length of chain = 2.16 kg

So, the mass of 7.0 m length of chain = $\frac{7.0m}{1m}\times 2.16kg$

= 15.12 kg

Therefore, the mass of 7.0 m chain is, 15.12 kg

3 0

3 years ago

When light is absorbed by chlorophyll that has been extracted into a solvent solution, it _________ releases the energy in the f

Anna35 [415]

Answer:

Photosystems PSI (P700) and PSII (P680) and photolysis of water releases energy

In the form of movement of electrons which is later extracted as ATP

Explanation:

On absorbing light energy electrons obtained from photolysis of water and those present in and those present in the reaction centres PSI and PSII move to the higher energy level and electron acceptors accept them. They then move down through the electron transport chain to the lower energy level during which ATP is produced which is a chemical form of energy.

4 0

4 years ago

What is the molarity of a solution made by dissolving 21.2 g of a sodium hydroxide (NaOH) in enough water to make 7.92 L of solu

Masja [62]

Formula for molarity is

Molarity=moles of solvent/solution in liters

In given data

NaOH is 21.2g which is needed to be convert in moles first

As no.of moles=mass in gram/molar mass

Molar mass of NaOH is 39.997g/mol

Putting in formula for mole.we get

No of mole = 21.2g/39.997gper mole

= 0.530mole

Now put these values in molarity equation, we get

Molarity =moles of NaOH/ solution in liter

= 0.530/7.92

=0.067M NaOH

4 0

4 years ago

What is the definition of bond length?

a_sh-v [17]

Answer:

C: No correct response

Explanation:

Bond length is simply defined as the distance between two atoms that are participating in a bond.

Now, looking at the options, none of the options correctly defines it this way. The closest is option E which is "distance between two electrons" but it uses the word electrons instead of atoms. Thus none of the statements are correct

6 0

3 years ago

Which solutions most concentrated ?

Anestetic [448]

We can find out concentration of solution by dividing number of moles by volume.
Most concentrated solution is the solution with highest number of moles in a unit volume
Concentration = number of moles/ volume
1. 0.1 mol/ 0.4 L = 0.25 mol/L
2. 0.2 mol / 0.3 L = 0.67 mol/L
3. 0.3 mol / 0.2 L = 1.5 mol/L
4. 0.4 mol/ 0.1 L = 4.0 mol/L

From the given solutions most concentrated solution is 4th solution. In this the highest amount of solute dissolved in a unit volume is 4.0 mol. Therefore this is the most concentrated solution.

3 0

3 years ago