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3 years ago

(reporting links) giving brainly

Chemistry

1 answer:

castortr0y [4]3 years ago

5 0

Answer:

Explanation:

B. low temperature, high dissolved oxygen, and neutral pH

Hope this Helps.

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In which time period did alchemists attempt to change less valuable metals into gold? 8000 BC – 1000 BC 1000 BC – 450 BC 300 BC

SSSSS [86.1K]

Time Period 3 (300 BC to 1400 AD)

The alchemists were in pursuit of 2 ideals. First, alchemy came about from the belief that cheap metals can be transmuted to gold using the legendary substance <em>Philosopher's Stone</em> for the conversion. These views were greatly influenced by Aristotle. Thus, from 300 BC to 1400 AD, alchemists worked to make the conversion of cheap metals to gold a reality. However, it never succeeded.

After this, the second ideal that the alchemists were in pursuit of was the concoction of an elixir of life to enable people to live longer and cure all ailments. This took place in the 1500s up to the end of the 1600s. Just like the pursuit of the first ideal, efforts to succeed in the second one all led to failure.

5 0

3 years ago

Draw the major 1,2- and 1,4-addition products that form as a result of the following reaction between one equivalent each of 2,4

lapo4ka [179]

The major 1,2- and 1,4-addition products are 4-Bromo-2-hexene and 2-Bromo-2-hexene.

What is Markovnikov Rule ?

Markovnikov rule explains that in addition reaction of alkene react with a hydrogen halide. The hydrogen atom is attached to the carbon atom that is already bonded to the greatest number of hydrogen.

<h3>What is Addition Reaction ?</h3>

An addition reaction is an organic reaction occur when two or more molecules combine to form a larger molecule without the loss of any atoms present in reactant.

Thus from the above conclusion we can say that The major 1,2- and 1,4-addition products are 4-Bromo-2-hexene and 2-Bromo-2-hexene.

Learn more about the Markovnikov Rule here: brainly.com/question/21496002

#SPJ1

6 0

2 years ago

The list shows a number of common chemical substances. [5]

SVETLANKA909090 [29]

Answer: Not sure ;c

Explanation:

3 0

3 years ago

2. Calculate how many moles of H2 would be produced if 0.250 mol of Fe reacts completely. (1 mark)

den301095 [7]

Hey there!:

Balanced Equation , for the reaction:

3 H₂SO₄(aq) + 2 Fe(s) → Fe₂(SO₄)₃(aq) + 3 H₂(g)

2 moles Fe ---------------------------------- 3 moles H₂

0.250 moles Fe ---------------------------- ( moles H₂ ) ??

____________________________________________

moles H₂ = 0.250 × 3 / 2

moles H₂ = 0.75 / 2

moles = 0.375 moles of H₂

Hope this helps!

7 0

3 years ago

~ WILL MARK AS BRAINLIEST ~

Genrish500 [490]

Answer:

200 grams is the mass of 15% of the solution of lime that is formed by dissolving 30g of calcium hydroxide in water.

Explanation:

Mass of solution = M

Mass percentage of the solution of lime = 15%

Mass of lime or calcium hydroxide = m = 30 g

The Formula of mass percentage is given as :

$m/m\%=\frac{m}{M}\times 100$

On substituting the values in ab above formula :

$15\%=\frac{30 g}{M}\times 100$

$M=\frac{30 g}{15}\times 100=200 g$

200 grams is the mass of 15% of the solution of lime that is formed by dissolving 30g of calcium hydroxide in water.

7 0

3 years ago