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2 years ago

What is the main type of weathering in deserts? weathering by organic acids chemical weathering physical weathering

Chemistry

1 answer:

Solnce55 [7]2 years ago

5 0

Answer:

chemical

Explanation:

Chemical weathering, which is the decomposition of a rock by the alteration of its chemical composition.

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Given the equation representing a reaction at equilibrium: N₂ + 3H₂ ⇄ 2NH₃ What occurs when the concentration of H₂ is increased

ValentinkaMS [17]

That would cause the equation to shift right, and make more NH3 and decrease the amount of N2

4 0

2 years ago

Scientists have been able to find a full record of Earth's fossil history, thus making the fossil record complete.

Arada [10]

Answer:

False

Explanation:

Few organisms were not preserved as well as others, and new fossils are found every day

5 0

2 years ago

Activation energy is what kind of chemical reaction that absorbs energy

seraphim [82]

Activation energy is the energy required by reactants to undergo chemical reaction and given products

Every reactant has some internal energy (sum of all kind of energy like kinetic energy, potential energy, mechanical energy, chemical energy etc). It needs some extra energy to undergo chemical reaction which is activation energy

All kinds of reaction whether exothermic or endothermic needs activation energy

Threshold energy = internal energy + activation energy

3 0

2 years ago

Last week you reacted magnesium with a hydrochloric acid aqueous solution and hydrogen gas was produced. Let's say that you coll

miv72 [106K]

Answer:

69.8 kilo Pasacl is the pressure of the hydrogen gas.

Explanation:

$Mg+2HCl\rightarrow MgCl_2+H_2$

Pressure at which hydrogen gas collected = p = 101.2 kilo Pascals

Vapor pressure water = $p^o$ = 31.4 kilo Pascals

The pressure of hydrogen gas = P

The pressure at which gas was collected was sum of vapor pressure of water and hydrogen gas.

$p=P+p^o$

$P =p-p^o=101.2 kPa-31.4 kPa=69.8 kPa$

69.8 kilo Pasacl is the pressure of the hydrogen gas.

3 0

2 years ago

A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make

Marta_Voda [28]

Answer:

32g

Explanation:

potassium nitrate has solubility of about 67g per 100g of water at 40°C, which means that potassium nitrate solution will contain 67g of dissolved salt for every 100g of water.

since at this temperature, our solution contains 35g of potassium nitrate 100g of water. The solution will be unsaturated because of the less potassium nitrate.

to make saturated solution,

mass of potassuim nitrate = 67g - 35g

= 32g

which means dissolving another 32g of potassium nitrate in solution at 40 °C will make saturated solution.

5 0

2 years ago