Question 5 (5 points)

1 answer:

5 0

A) LITHIUM is the least reactive alkali metal

B) FRANCIUM is the most reactive alkali metal

C) BERYLLIUM is the least reactive alkaline earth metal

D) RADIUM is the most reactive alkaline earth metal

E) TENNESSINE is the most reactive halogen

For E it might also be Astatine because Tennessine is a fairly new

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Score:

pishuonlain [190]

Some of the NH₄+ will combine with the OH- and shift the equilibrium backwards and from NH₄OH to balance the change produced by addition of NH₄+ ions.

5 0

3 years ago

1. 2.0 mL/s x 4.0 hrs = ? L<br><br> How do you do this conversion problem

Phantasy [73]

Answer:

29 L.

Explanation:

Hello!

In this case, considering that we are performing a conversion by which the time should be cancelled out to obtain liters, we first need to convert the seconds on bottom to hours and then the volume on top to liters, just a shown down below:

$2.0\frac{mL}{s} *\frac{1L}{1000mL} *\frac{3600s}{1hr}*4.0hr\\\\=28.8L$

Which turns out 29 L with 2 significant figures.

Best regards!

6 0

3 years ago

the most likely explanation for the increase in average beak size of the medium ground finch is that the

Romashka-Z-Leto [24]

Answer:

Well according to the Law of Evolution, depending on where the Finch lives and what it eats depends on it's beak size. For example, if a Finch lives on the coast and eats small fruits it will have a short and stubby beak to peck at the fruits, but if the Finch ate crabs it's beak would be long to swoop down and pluck up crabs.

Hope this helps!

7 0

3 years ago

How many moles are in 25.2g of KMnO4?

Zolol [24]

When finding the moles in a compound you have to know the grams. In this case, 25.2 grams are given for KMnO4. To find the moles you would divide the amount of grams by the molar mass of KMnO4. The molar mass of KmnO4 is 158.034. You you would now divide 25.2 by 158.034 which is 0.15946 moles. Depending on how many decimal places the questions asks for is dependent on you. I just went with 5 significant figures.

4 0

3 years ago

Read 2 more answers

How would you describe the strength of the bonds that result from resonance in SO3?

Sladkaya [172]

Answer:

All bonds are equivalent in length and strength within the molecule.

Gaseous SO3 is a trigonal planar molecule that exhibit a D3h symmetry group.

Sulfur has sp2 hybridization and it has 6 outer electrons which make the bonds with the oxygen.

Its constituent sulfur atom has an oxidation state of +6 and a formal charge of 0.

The Lewis structure is made up of one S=O double bond and two S–O dative bonds that doesn't not engage the d-orbitals. ( Thus, SO3 molecule has three double bonded oxygen to the central sulfur atom). This explains the strength.

It gaseous form had a zero electrical dipole moment because of the 120° angle between the S-O bonds.

Explanation:

7 0

3 years ago