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3 years ago

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Rank the following in order from most acidic to least acidic. sample pH bleach 12.5 coffee 4.2 rainwater 5.4 soap 10.1 (1 point)

rainwater, coffee, bleach, soap coffee, rainwater, soap,bleach soap, bleach, coffee, rainwater bleach, soap, rainwater, coffee

1 answer:

Ainat [17]3 years ago

6 0

Hope this helps you.

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When 220 mL of 1.50x10^-4 M hydrochloric acid is added to 135 mL of 1.75x10^-4 M Mg(OH)2, the resulting solution will be________

siniylev [52]

Answer:

Basic

Explanation:

Considering

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

So,

$Moles =Molarity \times {Volume\ of\ the\ solution}$

For hydrochloric acid :

Molarity = $1.50\times 10^{-4}$ M

Volume = 220 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 220×10⁻³ L

$Moles =1.50\times 10^{-4} \times {220\times 10^{-3}}\ moles$

Moles of hydrochloric acid = 0.000033 moles

For $Mg(OH)_2$ :

Molarity = $1.75\times 10^{-4}$ M

Volume = 135 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 135×10⁻³ L

$Moles =1.75\times 10^{-4} \times {135\times 10^{-3}}\ moles$

Moles of $Mg(OH)_2$ = 0.000024 moles

According to the given reaction:

$Mg(OH)_2_{(aq)}+2HCl_{(aq)}\rightarrow MgCl_2_{(s)}+2H_2O_{(aq)}$

1 mole of $Mg(OH)_2$ reacts with 2 moles of HCl

Also,

0.000024 mole of $Mg(OH)_2$ reacts with 2*0.000024 moles of HCl

Moles of HCl = 0.000048 moles

Available moles of HCl = 0.000033 moles

Limiting reagent is the one which is present in small amount. Thus, HCl is limiting reagent.

Thus, HCL will be consumed completely and $Mg(OH)_2$ will be left over. Thus, the resulting solution will be basic.

4 0

4 years ago

What kind of energy does an unlit match have?

Harman [31]

Answer:

Potential Energy

Explanation:

Right now, the match is giving off no energy to it's environment.

<em>Light</em><em> </em><em>it</em><em>.</em>

Now it's giving off a few kinds:

Thermal energy (heat)
Light energy

The match has the potential to have energy, but it currently has none.

3 0

3 years ago

You observe heat, light, and sound released by a chemical reaction. This reaction is (2 points)

OLEGan [10]

Exothermic reaction.

3 0

3 years ago

All of the following are abiotic factors in an ecosystem except:

vovangra [49]

The answer is Algae.

<span>Abiotic factors are non-living things of an ecosystem. Abiotic factors include landscape, climate, pH, salinity and other physical features of the ecosystem. On the other hand, there are b</span>iotic factors. Biotic factors are living things in the ecosystem. Those are plants, animals, and other organisms. Since Algae are living-things, they are biotic factors unlike pH, salinity, and climate which are abiotic factors.

8 0

4 years ago

3 ejemplos de sublimacion<br>

Vanyuwa [196]

Uno:

El dióxido de Carson (CO2)

7 0

3 years ago