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Trava [24]
4 years ago
11

What is the cornaviris?

Chemistry
2 answers:
kakasveta [241]4 years ago
7 0

Answer:

its a bad diease that is killing a lot of people all over the world

Explanation:

Veronika [31]4 years ago
3 0

Answer:

A contagious virus

Explanation:

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A 13.00 g sample of a compound contains 4.15 g potassium (k), 3.76 g chlorine (cl), and oxygen (o). calculate the empirical form
MrRissso [65]

To solve this problem, let us all convert the mass of each element into number of moles using the formula:

moles = mass / molar mass

Where,

molar mass K = 39.10 g / mol

<span>molar mass Cl = 35.45 g / mol</span>

molar mass O = 16 g / mol

<span>and mass O = 13 g – 4.15 g – 3.76 g  = 5.09 g</span>

 

moles K = 4.15 g / (39.10 g / mol) = 0.106 mol

<span>moles Cl = 3.76 g / (35.45 g / mol) = 0.106 mol</span>

moles O = 5.09 g / (16 g / mol) = 0.318 mol

 

The ratio becomes:

0.106 K: 0.106 Cl: 0.318 O

We divide all numbers with the smallest number, in this case 0.106. This becomes:

K: Cl: 3O

 

Therefore the empirical formula is:

KClO_{3}

7 0
3 years ago
Milk milk milk........
pav-90 [236]

Answer:

gimme that chocky milk.....

Explanation:

4 0
3 years ago
In which 1.0-gram sample are the particles arranged in a crystal structure? cacl2(s) c2h6(g) ch3oh() cai2(aq)?
Feliz [49]
Answer is: CaCl₂(s), calcium chloride.

Calcium cations and chlorine anions have a crystal structure in this solid inorganic salt. Ions have <span>the ordered arrangement.</span><span>
Ethane (C</span>₂H₆) is gas, g is chemistry abbreviations or physical state symbol for gas, gases do not have a crystal structure.
Methanol (CH₃OH) is liquid, l is chemistry abbreviations or physical state symbol for liquids, it do not have a crystal structure.
Calcium iodide is dissolved in water, aqueous solution (aq) do not have a crystal structure.
3 0
3 years ago
The degree of polarity of diatomic molecules is directly related to the difference in _____.
Crank
The degree of polarity of diatomic molecule is related to the difference of electronegativity of the two atoms. If the difference is very large, i.e. one atom is highly electronegative and the other atom is highly electropostive then, the covalent bond is formed. But if the difference between the electronegativities is very less, then its likely that ionic bond is formed.
6 0
3 years ago
Read 2 more answers
a common concentration unit used commercially is percent weight per volume (%w/v) which is the number of gram of solute in 100 m
iris [78.8K]

Answer:

  • <em>The molar concentraion is </em><u>0.74 M</u>

Explanation:

<u>1) Data:</u>

a) % w/v = 2.5%

b) compound: H₂O₂ (from a table molar mass = 34.0147 g/mol)

c) M = ?

<u>2) Formulae:</u>

a) % w/v = (mass of soulte / volume of solution) × 100

b) numer of moles, n = mass in grams / molar mass

c) M = number of moles of solute / liters of solution

<u>3) Solution:</u>

a) T<u>ake a base of 100 ml of solution (0.100 liter)</u>:

  • %w/v = 2.5% = 2.5 g solute / 100 ml solution

  • mass of solute = 2.5 g / 100 ml × 100 ml  = 2.5 g

b) <u>Calculate the number of moles of solute, n</u>:

  • n = mass in grams / molar mass = 2.5 g / 34.0147 g/mol = 0.0735 mol

c) <u>Calculate the molarity, M</u>:

  • M = n / V in liter = 0.0735 mol / 0.100 liter = 0.735 M

Round to two significant figures: 0.74 M ← answer

4 0
3 years ago
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