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soldi70 [24.7K]
3 years ago
12

Which element is able to combine in many ways with different elements and is therefore considered the basis of life?

Chemistry
2 answers:
frozen [14]3 years ago
8 0

CARBON


It loves to donate electrons, and combines easily with most things, and is essential to many things.

Kitty [74]3 years ago
5 0

Answer: Option (C) is the correct answer.

Explanation:

Carbon element has 4 valence electrons and it has a unique ability to combine with different elements.

Also, carbon element is the basis of life as organic molecules are responsible for life an individual.

And, every organic compound contains carbon atom as the central element.  

Also, carbon has the ability to form long chains which is known as catenation property.

Thus, we can conclude that carbon element is able to combine in many ways with different elements and is therefore considered the basis of life.

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How many days would it take for a crepe myrtle tree to grow 1 cm in height if it grows 3.38 feet per year?
ololo11 [35]
It's very easy, it's depending mainly on converting a mathematical unit:

When 1 Cm = 0.0328084 Ft
So, we assume that: 
in    1 year → it grows 3.38 Ft

So  X(years)→ 0.0328084

∴X(years) = 0.0328084 * 3.38 = 0.0097 year

We have to convert this unit form years to days by:

       1 year = 365 days
So,  0.0097 =  X (days)
∴X(days)= 365 * 0.0097 = 3.5 days

So it will take 3.5 days to grow up

7 0
3 years ago
How many atoms of oxygen are present in the reactants and products? 6CO2+6H2O-> C6H12O6+6O2
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6 Carbon atoms
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6 0
3 years ago
Silver nitrate reacts with calcium to make calcium nitrate and silver. The reaction is exothermic and produces 18.7 kJ/mol of en
denis-greek [22]

Answer:

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.

Explanation:

AgNO_3+Ca\rightarrow Ag+CaNO_3,\Delta H_{rxn}=-18.7 kJ/mol

Mass of silver nitrate = 14.8 g

Moles of silver nitrate = \frac{14.8 g}{170 g/mol}=0.08706 mol

According to reaction, when 1 mole of silver nitrate reacts with 1 mole of calcium it gives 18.7 kJ of heat.

Then amount of heat released when 0.08706 moles of silver nitrate reacts :

0.08706\times 18.7 kJ=1.628 kJ\approx 1.63 kJ

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.

6 0
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How do scientists plan for missing bones?
hodyreva [135]

Answer:

scientist never ignore the missing -parts of body

Explanation:

they take the missing bones as an opportunity to look into them as practical for pre medical student ,they are very costly sealed

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