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Yuri [45]
3 years ago
9

How many grams of kno3 pellets must be dissolved in water in order to prepare 100 ml of a 8 m kno3?

Chemistry
1 answer:
Montano1993 [528]3 years ago
4 0
In 8M of KNO3, there are x moles of KNO3 divided by (100/1000)L of water (because molarity is concentration, given by no. of moles divided by total volume in liters).

by changing the subject of formula, x = 0.1L × 8M = 0.8mol

given the no. of mol of KNO3, mass of KNO3 is given by no. of mol multipled by the relative molecular mass of KNO3.

mass = 0.8mol × 101.10g/mol (or whatever your periodic table says) = 80.88g
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Explain how lone pairs of electrons influence the shape of a molecule.
Ronch [10]

Explanation:

the lone pairs will be negatively charged. these have a repulsion effect on other negatively charged electrons in the shells of atoms. picture a water molecule: the lone electron pair on the top of the oxygen will have a repulsion force on the 2 hydrogen atom's orbiting electrons to cause a bent molecular geometry.

3 0
3 years ago
When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by other electrons obtained by ____
fomenos
The answer is by "splitting water".

hope this helps
5 0
3 years ago
Potassium chlorate decomposes into potassium chloride and oxygen gas. How many grams of oxygen are produced when 1.06 grams of p
kifflom [539]

The amount of oxygen that are produced when 1.06 grams of potassium chlorate decompose completely is 0.64 grams.

<h3>What is the relation between mass & moles?</h3>

Relation between the mass and moles of any substance will be represented as:

  • n = W/M, where
  • W = given mass
  • M = molar mass

Moles of potassium chlorate = 1.66g / 122.5g/mol = 0.0135mole

Given chemical reaction is:

2KClO₃ → 2KCl + 3O₂

From the stoichiometry of the reaction, it is clear that:

2 moles of KClO₃ = produces 3 moles of O₂

0.0135 moles of KClO₃ = produces (3/2)(0.0135)=0.02 moles of O₂

Mass of oxygen = (0.02mol)(32g/mol) = 0.64 g

Hence produced mass of oxygen is 0.64 grams.

To now more about mass & moles, visit the below link:
brainly.com/question/18983376

#SPJ1

5 0
2 years ago
CAN SOMEONE PLEASE HELP ME ASAP?!!!!
krok68 [10]
A and d is physical, b and c is chemical
4 0
3 years ago
The data in the table are the result of a paramecium being placed in a hypertonic salt solution.
kolezko [41]
<span>the answer is
C. The bar for very low concentration is twice the height of the bar for medium concentration.

proof
</span>
<span>
</span>
<span>Medium--------------------15

</span>Very Low-------------------30 = 2<span /> x 15 (<span>Medium)
</span>



3 0
3 years ago
Read 2 more answers
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