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3 years ago

What of the following is the BEST statement about dependent and independent variables?

Chemistry

2 answers:

solmaris [256]3 years ago

8 0

Answer is the first one

Sonbull [250]3 years ago

3 0

1. A dependent variable is a factor that changes because of procedures conducted on the independent variable.

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1)Describe the industrial Manufacture of

I am Lyosha [343]

The Haber Process combines nitrogen from the air with hydrogen derived mainly from natural gas (methane) into ammonia. The reaction is reversible and the production of ammonia is exothermic. The catalyst is actually slightly more complicated than pure iron.
Physical properties: Ammonia is a colorless gas with a sharp, penetrating odor. Its boiling point is -33.35 °C, and its freezing point is -77.7 °C. ... Chemical properties: Ammonia is a weak base. It combines with various acids to form ammonium salts, which are important chemicals in many industries. Ammonia is a colourless gas with a characteristic pungent smell. It is lighter than air, its density being 0.589 times that of air. It is easily liquefied due to the strong hydrogen bonding between molecules; the liquid boils at −33.3 °C (−27.94 °F), and freezes to white crystals at −77.7 °C (−107.86 °F).
Ammonia is also used as a refrigerant gas, for purification of water supplies, and in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals. It is found in many household and industrial-strength cleaning solutions.
Nitric acid is made by reaction of nitrogen dioxide (NO2) with water. Or, shortened: 3 NO2 + H2O → 2 HNO3 + NO. Normally, the nitric oxide produced by the reaction is reoxidized by the oxygen in air to produce additional nitrogen dioxide.
Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins.
Gardeners and homeowners sometimes might need to add nitrogen fertilizer to their gardens and lawns to provide just the right food for their plants. ... Nitrogen at higher levels causes a loss of certain plant species, depletion of soil nutrients, death of fish and aquatic organisms, and contamination of drinking water.

3 0

4 years ago

How many atoms are in 4H3BO3

maksim [4K]

1 mole of h3bo3...........6.023*10²³ each h and B and 0 so we will have 3hydrogen+ 1 B+3 oxygen = 7*6.023*10²³ atoms

1 mole .......7*6.023*10²³atoms

4 moles ........x atoms

x=4*7*6.023*10²³.

3 0

3 years ago

What is the general form for the simplest type of acid-base reaction?

Masteriza [31]

Answer:

Your answer is C

Explanation:

When an acid and base react, the acidic hydrogen ion and the basic hydroxide ion in each acid and base neutralize each other and form water. Meanwhile the conjugate base and conjugate acid (the leftover compounds) react to form an ionic molecule, or a salt. (In chemistry, when an anion and a cation form an ionic bond the new molecule is called a salt). Hope this helps!

7 0

3 years ago

Read 2 more answers

If if it takes 41.72 Joules to heat a piece of gold weighing 18.69 g from 10°C two 27°C what is the specific heat

Luba_88 [7]

The specific heat means the heat absorbed when 1 g of the compound increase 1 ℃. So the specific heat is 41.71/(18.69*17)=0.131 J/(g*k).

8 0

3 years ago

N2+3H2—> 2NH3 What volume of NH3 at STP is produced if 25.0g of N2 is reacted with an excess of H2 ?

Butoxors [25]

Answer:

The answer to your question is 40 L of NH₃

Explanation:

Data

Volume of NH₃ = x

mass of N₂ = 25 g

mass of H₂ = excess

Balanced chemical reaction

N₂ + 3H₂ ⇒ 2NH₃

Process

1.- Find the molar mass of N₂ and NH₃

N₂ = 14 x 2 = 28g

2NH₃ = 2[ 14 + 3] = 34 g

2.- Write a proportion to solve this problem

28 g of N₂ --------------- 34 g of NH₃

25 g of N₂ ------------- x

x = (25 x 34)/28

x = 30.36 g of NH₃

3.- Calculate the volume of NH₃

17 g of NH₃ -------------- 22.4 L

30.36 g of NH₃ -------- x

x = (30.36 x 22.4) / 17

x = 40 L

6 0

3 years ago