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Pani-rosa [81]
2 years ago
7

Select which of the following are used to determine the age of the Earth. Select 3.

Chemistry
1 answer:
saveliy_v [14]2 years ago
7 0

Meteorites discovered on earth

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Zn + 2 HCl --> ZnCl2 + H2 How many moles of hydrochloric acid (HCl) are used (assume a complete reaction) if 8.3 moles of zin
uysha [10]

Answer:

E. 16.6 mol HCl

Explanation:

The equation for the reaction is;

Zn + 2 HCl --> ZnCl2 + H2

From the reaction 2 moles of HCl produces 1 mole of ZnCl2

Therefore; 8.3 moles of ZnCl2 will be produced by;

  = 8.3 moles ×2

  = 16.6 Moles of HCl

  Therefore;  E.  16.6 mol HCl

4 0
3 years ago
250 ml glass of lemon juice contains 20 grams of sugar. How much sugar is in 500 ml bottle
iren2701 [21]

There is 40 g of sugar in a 500 ml bottle of lemon juice

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

the concentration of sugar in lemon juice :

\tt \dfrac{20~g}{250~ml}=0.08~g/ml

So for 500 ml juice :

\tt 500\times 0.08=40~g~sugar

5 0
3 years ago
PLEASE HELP ILL GIVE BRAINLIST‼️‼️‼️‼️
pantera1 [17]
Natural vs. Synthetic Venn Diagram: Natural chemicals are produced by nature without any human intervention. Synthetic chemicals are made by humans using methods different than those nature uses, and these chemical structures may or may not be found in nature
7 0
3 years ago
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Required nutrients in foods that are made by other living organisms are_______
Mazyrski [523]

Answer: Vitamins

Explanation:

they are nutrients that are made by living things

5 0
3 years ago
A new stable element with an atomic number of 120 and an atomic mass of 246 is created in a particle accelerator. Enough of this
deff fn [24]

Answer:

Be,Mg,Ra etc

Explanation:

It should be palced in group 2A because as it reacts with chlorine in ratio of 1:2 . It's valancy is 2 and is metal as it react with non metal donating two electrons .

one more thing it fits there orderly

3 0
3 years ago
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