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2 years ago

QUIZ SCIENCE:

1 answer:

7 0

1. A soluble salt can be prepared by reacting an acid with a suitable insoluble reactant including:

a metal
a metal oxide
a carbonate
3. I don’t know this one
4. A term base or glossary is a database containing single words or expressions related to a specific subject.
5. Strong acid is an acid that ionizes completely in aqueous solution. It always loses a proton (H+) when dissolved in water. Weak acid is an acid that ionizes partially in a solution. ... Because the rate of reaction depends upon the degree of dissociation αand strong acids have higher degrees of dissociation.

im not sure of the rest

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Which gases contribute to the acid rain formation?

dusya [7]

The main chemicals in air pollution that create acid rain are sulfur dioxide (SO2) and nitrogen (NOx). Acid rain usually forms high in the clouds where sulfur dioxide and nitrogen oxides react with water, oxygen, and oxidants. this mixture forms a mild solution of sulfuric acid and nitric acid

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3 years ago

Calculate the amount (in grams) of kcl present in 75.0 ml of 2.10 m kcl

Lera25 [3.4K]

V = 75 mL = 0,075 L = 0,075 dm³
C = 2.1M
n = ?
---------------
C = n/V
n = C×V
n = 2.1×0,075
n = 0,1575 mol
--------
mKCl: 39+35.5 = 74,5 g/mol

74,5g --------- 1 mol
Xg ------------- 0,1575 mol
X = 74,5×0,1575
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3 years ago

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Ivahew [28]

Plastids store food or pigments

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3 years ago

A solution of 6.54 g of a carbohydrate in 102.5 g of water has a density of 1.024 g/mL and an osmotic pressure of 4.61 atm at 20

4vir4ik [10]

The molar mass of the carbohydrate : = 304.19 g/mol

<h3>Further explanation</h3>

Given

6.54 g carbohydrate

102.5 g of water

osmotic pressure of 4.61 atm

T = 20+273=293 K

Required

The molar mass

Solution

General formula:

$\large {\boxed {\bold {\pi \: = \: M \: x \: R \: x \: T}}}$

π = osmosis pressure (atm)

M = solution concentration (mol / l)

R = constant = 0.08205 L atm mol-1 K-1

T = Temperature (Kelvin)

Find molarity(M) :

4.61 atm = M . 0.08205 x 293

M = 0.192 mol/L(mol solute per 1 liter solution)

Total mass of solution :

= 6.54 g + 102.5

= 109.04 g

Volume of solution :

= density x mass

= 1.024 g/ml x 109.04 g

= 111.66 ml

= 0.112 L

mol Carbohydrate (solute):

= M x V

= 0.192 x 0.112

= 0.0215 mol

Molar mass of Carbohydrate :

= mass : mol

= 6.54 : 0.0215

= 304.19 g/mol

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3 years ago

What will the charge of Sulfur be when dissolved in water?

Marina86 [1]

Answer:

Explanation:

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3 years ago