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SpyIntel [72]
3 years ago
8

“The element vanadium is a solid at room temperature, and its density is 6110 kilograms per meter cubed. Its melting point is 19

10 degrees Celsius.” Which correctly evaluates the statement? not reliable because opinions are presented, reliable because testable facts are presented, not reliable because it is very brief ,reliable because metric units are used
Chemistry
2 answers:
Luba_88 [7]3 years ago
7 0
I think the correct answer is the second option. The statement pertaining to the properties of the element vanadium is reliable because the facts presented are testable or can be verified by doing experimentation. Also, nowadays, many studies are present that contains properties of almost anything.
Amanda [17]3 years ago
6 0
I know that it is [<span>not reliable because opinions are presented]</span>
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How many moles is in 2.52*10^24 molecules of water?
nataly862011 [7]
Hi friend
--------------
Your answer
-------------------

Water = H2O

Number of molecules in one mole of water = 6.022 × 10²³ [Avogadro's constant]

Given number of molecules = 2.52 × 10²³

So,
------

Number of moles =
\frac{2.52 \times 10 {}^{24} }{6.022 \times 10 {}^{23} }  \\  \\  = 4.184 \: (approximately)

HOPE IT HELPS
3 0
3 years ago
Balance the following equation:<br> Sg + F2 --&gt; SF
Tanzania [10]

Answer:

S+ F2 ⇒ SF

S=1

F =2

So S +F2 ......... 2SF

2S + F2 ..........2SF this is a balance equation

S=2 F=2 in left side s=2 F = 2 in rightside

Explanation:⇆

⇒

3 0
3 years ago
How many unpaired electrons are there in <br> Cu1+ ion
goldfiish [28.3K]
If electrons are negative, losing an electron makes the ion positive.
Therefore Cu1+ contains 1 unpaired electron.
8 0
3 years ago
A chemist combine did 3.50g of potassium level with chlorine gas to yield 6.6 7g of potassium for it. Assuming all the potassium
slega [8]

Answer: mass of chlorine reacted is 3.18 g

Explanation:

2 K + Cl2 = 2KCl

no. of moles of K = mass / molar mass

= 3.50 / 39

= 0.0897

no. of moles of KCl = mass / molar mass

= 6.67 / 74.5

= 0.0895  

no. of moles of Cl2 required = number of moles of KCl / 2

= 0.0895 / 2

= 0.0448 moles  

mass of Cl2 required = no. of moles of Cl2 required x molar mass

= 0.0448 x 71

= 3.1808 g ≈ 3.18 g

Therefore mass of chlorine reacted is 3.18 g

4 0
3 years ago
the element Potassium is found in the fourth. Of the periodic table what does that tell you about an atom of potassium​
alexira [117]
It tells you how many atoms it has, how many protons it contains and the number of electrons.

6 0
3 years ago
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