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2 years ago

Which statement about the elements in the periodic table is true?

2 answers:

8 0

The answer is B) The reactivity of alkali metals increases as atomic mass increases. Just checked on Gradpoint and it was correct!

UNO [17]2 years ago

5 0

b) The reactivity of alkali metals increases as atomic mass increases.

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Strigol is an important plant hormone that is released by crops such as rice and sugarcane. Unfortunately for these plants, stri

Len [333]

The hydrogen deficiency index( HDI) of strigol is = 10

<h3>How to calculate HDI:</h3>

The hydrogen deficiency index is used to measure the number of degree of unsaturation of an organic compound.

Strigol is an example of an organic compound because it contains carbons and hydrogen.

To calculate the HDI using the molecular formula given (C19H20O6) the formula for HDI is used which is:

$hdi = \frac{1}{2} (2c + 2 + n - h - x)$

where C = number of carbon atoms = 19

n= number of nitrogen atoms = 0

h= number of hydrogen atoms = 20

X = number of halogen atoms = 0

Note that oxygen was not considered because it forms two bonds and has no impact.

There for HDI =

$\frac{1}{2} (2 \times 19 + 2 + 0 - 20 - 0)$

HDI=

$\frac{1}{2} (40 - 20)$

HDI =

$\frac{1}{2} \times 20$

HDI = 10

Therefore, the hydrogen deficiency index of strigol is = 10

Learn more about unsaturated compounds here:

brainly.com/question/490531

7 0

2 years ago

Select all the correct images.<br> Select the atomic models that belong to the same element.

Alex_Xolod [135]

Answer:The 2nd and 3rd one.

Explanation:

It has the same number of protons but different amount of nuetrons.

7 0

2 years ago

Please Help 8-9!!!!!!!

seropon [69]

The labeled diagram is given in the image attached.

As it can be seen from the image that freezing is when energy is removed from the system at 0 ⁰ while melting is when energy is added at 0⁰.

Also when energy is added at 100⁰C, it causes boiling while when it is removed at 100⁰C, it causes condensation.

Melting point of water is 0⁰C while boiling point is 100⁰C

3 0

2 years ago

Sha-vzwq-aby<br><br> Ladkiyoooooo aaa jaooo♡♥︎♡<br><br> Jaldiiiii karo na yaaaar

leva [86]

Answer:

kjajjahahayq :/

Explanation:

a sbywsbgv usnwbhx hg xw nx hb gs

5 0

2 years ago

Read 2 more answers

A student collected a 47.5 mL sample of gas in the lab at 0.8 atm pressure and 29.00C. What volume would this gas sample occupy

Sav [38]

Answer:

the volume would be 69.034mL

Explanation:

8 0

2 years ago