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3 years ago

Which type of rock forms when an existing rock changes under extreme pressure and intense

1 answer:

8 0

Hornfels is a metamorphic rock that can form when a rock is subjected to high temperatures (extreme pressure ). Hornfels, which often forms when magma or lava touches other rock, is non foliated. Heat and pressure changes both igneous rocks sedimentary rocks into metamorphic <span>rocks. hope this helps! :)</span>

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Formula for Manganese Bromide Tetrahydrate

Lelu [443]

Answer:

I believe the molecular formula is MnBr2·4H2O or Br2H8MnO4

Explanation:

5 0

3 years ago

Which statement accurately compares the trends in atomic number and atomic mass in the periodic table?

Kruka [31]

Answer : The correct option is, (C) Both the atomic mass and the atomic number increase from left to right.

Explanation :

The general trend of atomic number and atomic mass in the periodic table is,

Both atomic number and atomic mass increase from left to right and decreases from right to left in the periodic table due to the addition of the number of neutrons and the number of protons in the nucleus.

Hence, the correct option is, (C) Both the atomic mass and the atomic number increase from left to right.

7 0

4 years ago

Read 2 more answers

If helium effuses through a porous barrier in 1.34 min, how much time (in min) would it take the same amount of ammonia to effus

timofeeve [1]

Answer:

The time taken the same amount of ammonia to effuse through the same barrier under the same conditions is 2.76 minutes.

Explanation:

Let the volume of the helium gas be = V

Time taken by the helium gas = t = 1.34 min

Effusion rate of helium gas = $R=\frac{V}{1.34 min}$

If V volume of ammonia effuse through same porous barrier the effusion rate of ammonia gas will be given as:

$R'=\frac{V}{t'}$

Using Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows the equation:

$\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}$

Molar mass of helium gas = M = 4 g/mol

Molar mass of ammonia gas = M' = 17 g/mol

$\frac{R}{R'}=\sqrt{\frac{M'}{M}}$

$\frac{\frac{V}{1.34 min}}{\frac{V}{t'}}=\sqrt{\frac{17 g/mol}{4 g/mol}}$

$t'=1.34 min\times \sqrt{\frac{17 g/mol}{4 g/mol}}=2.76 min$

The time taken the same amount of ammonia to effuse through the same barrier under the same conditions is 2.76 minutes.

8 0

3 years ago

What is a period in chemistry

Dennis_Churaev [7]

A period is the name given to a horizontal row of the periodic table. The periodic table has 7 periods.

5 0

3 years ago

One way to refine iron from iron ore is to heat the ore with hydrogen gas at high temperatures. Which change increases the amoun

tensa zangetsu [6.8K]

Answer: Adding Hydrogen Gas

Explanation:

The Reduction Reaction that occurs during the refinement of Iron Ore is as follows:

$Fe_3O_4 + H_2 -> 3FeO + H_2O\\\\FeO + H_2 -> Fe + H_2O$

Since Hydrogen Gas is a reactant in the equation with Iron ore , adding more hydrogen gas will shift the reaction toward the right side, increase the amount of refined iron produced.

8 0

4 years ago

Read 2 more answers