99 POINTS!!! PLEASE HELP

Chemistry

1 answer:

igor_vitrenko [27]3 years ago

8 0

How do chemical sedimentary rocks form?

Options: heat and pressure, evaporation of shallow sea water, layering of fossil sediments, colliding mountains.

The answer is evaporation of shallow sea water.

Gneiss is a metamorphic rock that is formed when granite is subjected to extreme heat and pressure. This occurs in when:

Options: shallow seas evaporate mountains, collide fossil sediments form layers, magma cools and hardens underground

The answer is magma cools and hardens underground.

You might be interested in

Macbeth informs his wife that

faust18 [17]

The answer is B hope it helped

3 0

3 years ago

Which of the following is NOT an indication of a chemical reaction?

PolarNik [594]

A. The substance dissolved. Just because a substance dissolved in a solvent doesn’t mean that a chemical action occurred. For example, if you put sugar in water as stir, it will dissolve, but the chemical make up of the sugar and the water don’t change. A chemical reaction can be indicated by a drastic change in color or temperature or if a substance precipitate.

Hope this helped :)

6 0

3 years ago

Read 2 more answers

How many grams of nh3 can be produced from 3.72 mol of n2 and excess h2.

olganol [36]

N₂ + 3H₂ ⇒ 2NH₃
1mol : 2mol
3,72mol : 7,44mol

n = 7,44mol
M = 17g/mol

m = n * M = 7,44mol * 17g/mol = 126,48g

7 0

4 years ago

What would be the freezing point of a solution that has a molality of 1.324 m which was prepared by dissolving biphenyl (C12H10)

lbvjy [14]

The freezing point of a 1.324 m solution, prepared by dissolving biphenyl into naphthalene, is 71.12 ° C.

A solution is prepared by dissolving biphenyl into naphthalene. We can calculate the freezing point depression (ΔT) for naphthalene using the following expression.

$\Delta T = i \times Kf \times m = 1 \times 6.90 \°C/m \times 1.324m = 9.14 \°C$