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krek1111 [17]
4 years ago
8

What is a double bond?

Chemistry
2 answers:
anastassius [24]4 years ago
8 0

The correct answer is A.

Vanyuwa [196]4 years ago
4 0

Answer:

Two covalent bonds between adjacent atoms in a molecule

Explanation:

A covalent bond is a <em>pair of electrons shared between adjacent atoms</em>, so a double (covalent) bond is two pairs of electrons shared between adjacent atoms.

We usually represent a covalent bond by a line, so a double bond is two lines between adjacent atoms, as in H₂C=CH₂.

Two separate single bonds are NOT a double bond.

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lesantik [10]

1st one is D

2nd one is A

4 0
4 years ago
What does “circulate” mean in this passage?
lisov135 [29]

Answer:

Below

Explanation:

Move or cause to move continuously or freely through the blood.

3 0
3 years ago
Read 2 more answers
3.5 grams is equivalent to how many kilograms? 3500 kg 35,000 kg 0.35 kg 0.0035 kg
bagirrra123 [75]
There are 1000 grams in a kg.
To convert g to kg, dovide by 1000.

3.5/1000= 0.0035 kg

Final answer: D
4 0
3 years ago
Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The o
liberstina [14]

Answer: Molar concentration of the tree sap have to be 0.783 M

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iCRT

where,

\pi = osmotic pressure of the solution = 19.6 atm

i = Van't hoff factor = 1 (for non-electrolytes)

R = Gas constant = 0.0821\text{ L.atm }mol^{-1}K^{-1}

T = temperature of the solution = 32^oC=[273+32]=305K

Putting values in above equation, we get:

19.6atm=1\times C\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 305K

C=0.783M

Thus the molar concentration of the tree sap have to be 0.783 M to achieve this pressure on a day when the temperature is 32°C

4 0
3 years ago
What type of reaction is the decay of carbon-14
ivolga24 [154]
First order reaction ?

3 0
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