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NARA [144]
4 years ago
12

A commonly used ingredient in a tincture to control microbes is

Chemistry
2 answers:
DiKsa [7]4 years ago
5 0
D. Iodine
Iodine is a very good disinfecting agent, and is used whenever treating wounds. It is usually found in solutions in the form of a salt, potassium iodide. Other compounds are also used, such as alcohols; however, the most commonly used one is iodine.
m_a_m_a [10]4 years ago
5 0
The answer is D. Tincture iodine is an antiseptic which is effective against bacteria and virus.
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Ostrovityanka [42]

Answer:

Thats right! Gj!

Explanation:

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What do the digestive and excretory systems have in common?
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Calcium carbonate forms limestone, one of the most common rocks on Earth. It also forms stalactites, stalagmites, and many other
max2010maxim [7]

Answer:  CaCO_3(s)\rightarrow CaO(s)+CO_2(g) , 0.533 L

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

According to avogadro's law, 1 mole of every substance occupies 22.4 L of volume at STP.

Number of moles =\frac{\text {given mass}}{\text {Molar mass}}

moles of calcium carbonate = \frac{2.38g}{100g/mol}=0.0238mol

As 1 mole of calcium carbonate produces = 22.4 L of carbon dioxide at STP

Thus 0.0238 moles of calcium carbonate produces =\frac{22.4 L}{1}\times 0.0238=0.533L of carbon dioxide at STP

3 0
3 years ago
Calculate the initial molarity of MCHM in the river, assuming that the first part of the river is 7.60 feet deep, 100.0 yards wi
Effectus [21]

Answer:

[MCHM] = 7.52 M

Explanation:

This all about unit conversion

1 feet = 0.3048 meters

1 yard = 0.9144 meters

7.60 feet . 0.3048 = 2.31 meters deep

100 yd . 0.9144 meters = 91.44 meters long and 91.44 meters wide

In the river we have a volume of:

2.31 m . 91.44m . 91.44m = 19314.5  m³

1 dm³ = 1 L

1 dm³ = 0.001 m³

19314.5 m³ / 0.001 m³ = 19314542 L (The final volume of the river)

3.785 L = 1 gallon

In 19314542 L, we have (19314542 / 3.785) = 5102917 gallons

1 gallon = 128 oz

5102917 gallons . 128 = 653173376 oz

1 oz = 28.3495 g

653173376 oz . 28.495 = 1.86x10¹⁰ grams

Molar mass MCHM = 128 g/m

Moles of MCHM = 1.86x10¹⁰ grams / 128 g/m = 145312500 moles

Molarity = mol /L → 145312500 moles / 19314542 L = 7.52 M

7 0
4 years ago
What happens when you swallow acid
aleksklad [387]

Some of the symptoms from swallowing hydrochloric acid:

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