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Tomtit [17]
2 years ago
12

Arrange the elements in order of increasing atomic size: Li, N, B

Chemistry
2 answers:
alexgriva [62]2 years ago
8 0

Answer:

N, B, Ni

Explanation:

Archy [21]2 years ago
3 0

Answer:

Explanation:

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How do you make a 3M solution of KBr? How many moles of KBr are 1 liter of a 0.3M solution?
pashok25 [27]
Molarity= moles/liter, so you would need 3mol KBr/1 liter
(0.3M)(1L)= 0.3mol KBr
8 0
3 years ago
Read 2 more answers
Which of the following groups in the periodic
Dimas [21]

Elements of Group 1 and  group 2  in the periodic table contain elements so reactive that they are  never found in the free state

<u>Explanation</u>:

The metals in group 1 of  periodic table consisting of 'alkali metals' which include lithium, potassium, sodium, rubidium, Francium and caesium. They are highly reactive because they have low ionisation energy and larger radius. The group 2 metals consist of 'alkaline earth metals' which include calcium, strontium, barium, beryllium, radium and magnesium.  These alkaline earth metal have +2 oxidation number, hence are highly reactive.

These both group metals are mostly reactive and so are never found in a free state. When they are exposed to air they would immediately react with oxygen. Hence, are stored in oils to avoid oxidation.

7 0
3 years ago
What volume of oxygen is needed to react with 20cm3 of ethane?
Anna71 [15]

Answer:

The reaction states that 2 moles of ethane react with 7 moles of oxygen. At standard temperature and pressure conditions (STP), each mole of gas occupies a volume of 22.4 liters. Therefore, 2 moles of ethane occupy liters, and 7 moles of oxygen occupy liters. In other words: 6 liters.

Explanation:

I hope it helps you

7 0
2 years ago
Iron in rock combining with oxygen to form hematite
blondinia [14]
The answer is a. Chemical change.
4 0
2 years ago
A. 2.0x1024 atoms of S to moles (3.3)
Fynjy0 [20]

3.3 moles of sulfur

Explanation:

To find the number of moles knowing the number of atoms we use Avogadro's number to formulate the following reasoning:

if in         1 mole of sulfur (S) there are 6.022 × 10²³ atoms of sulfur (S)

then in   X moles of sulfur (S) there are 2 × 10²⁴ atoms of sulfur (S)

X = (1 × 2 × 10²⁴) / (6.022 × 10²³)

X = 3.3 moles of sulfur

Learn more about:

Avogadro's number

brainly.com/question/1445383

#learnwithBrainly

5 0
3 years ago
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