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zhenek [66]
3 years ago
15

Amber is a precious material used in jewelry. It forms when the resin of pine trees hardens into stone. Is amber a mineral

Chemistry
1 answer:
lyudmila [28]3 years ago
5 0
Amber is not a mineral because amber is a hardened resin of specific species of ancient trees which has been fossilized over many years.

hope this helps!
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What is the name of this molecule?
Neko [114]
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3 years ago
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______________ is a durable material and is widely used for casting, which is a process by which the melted material is poured i
podryga [215]

The material that has been widely used in casting has been copper. Thus, option C is correct.

Casting has been the process of molding the liquid into a specific shape with the mold. The casting involves the heating of elements and converting them into liquid. The liquid has been poured into the mold and cooling results in the casted material.

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5 0
2 years ago
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Hess’s law
Delvig [45]

From the statement of Hess' law, the enthalpy of the reaction A---> C is +90 kJ

<h3>What is Hess' law?</h3>

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From Hess' law, the enthalpy change for the reaction A ----> C is calculated as follows:

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The above reaction A---> C can be shown in the enthalpy diagram below:

A -------------------> C (ΔH = +90 kJ)

\ /

\ / (ΔH = +60 kJ)

(ΔH = +30 J) \ /

> B

Learn more about enthalpy and Hess law at: brainly.com/question/9328637

8 0
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Vilka [71]
This is false because males have 1 X and 1 Y chromosome. It's females who have 2 X chromosomes. So, it's false.
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3 years ago
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Mercury is a liquid meteal but it is not hard? how can we say it is a metal
NNADVOKAT [17]
What's the problem ? Hardness is not the definition of a metal. You need to expand your thinking. EVERY element is solid, liquid, and gas, over different ranges of temperature ... including all of the metals. There are only TWO elements that are liquid AT ROOM TEMPERATURE, and mercury is one of them. But on a mild day at the south pole, mercury is solid too.
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