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3 years ago

Explain why igneous rocks do not contain fossils.

2 answers:

7 0

Fossils can not be formed in igneous rock because before it cooled from the liquid magma state, any renants of fossils would be destroyed and melted... they form in sedimentary because thats where they can be buried and perserved the easiest, metamorphic would destroy them from the pressures and temperatures involved in there formations

netineya [11]3 years ago

4 0

Any fossils that would have been in the original rocks would have melted when magma formed.

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Match these items.

notka56 [123]

Litmus is an indicator
Charged particles are ions
Acids contain H+ ions
Bases contain OH - ions
Hydronium ions are H3O+

Now, I have to take issue with the last one
A base of pH 14 is not a strong base, it would be a highly concentrated base. A strong base is a base that completely deionizes in water.

But technically, for the purpose of your answer strong base = pH 14

6 0

3 years ago

The sun is ____star

jeka94

The sun is a star.

If you were talking about that

7 0

2 years ago

Read 2 more answers

If you were going to graphically determine the enthalpy of vaporization, δhvap, for this liquid, what points would you plot

Klio2033 [76]

It depends on what type of graph you have. The easiest would be using a H-T diagram. Enthalpy of vaporization is the physical change from liquid to vapor. It occurs at a constant pressure and a constant temperature. As shown in the picture, 1 point is drawn on the subcooled liquid, and another point of the saturated vapor isothermal line. Now, the difference between those two points is the value for the enthalpy of vaporization of water.

8 0

3 years ago

Ira Lisetskai [31]

Answer:

$410mg/day *\frac{1000 ug}{1 mg}$

Recommended daily Amount (RDA) of magnesium is 410,000 μg/day.

Explanation:

There are 1000μg in 1 mg and 1000 mg in 1g

1 mg=1000μg

The Recommended daily Amount (RDA) is 410 mg/day of magnesium. Converting 410 mg/day into μg/day

$410mg/day *\frac{1000 ug}{1 mg}$

It will become 410,000 μg/day

So Recommended daily Amount (RDA) of magnesium is 410,000 μg/day.

4 0

3 years ago

1. Which of the following metals oxidized by calcium ions?

viktelen [127]

1 A

2 B

3 B

4 A

5 B

6 D

7 D

8 B

8 0

3 years ago