How many ml of 0.500 m naoh would be required to exactly neutralize 220.0 ml of 0.150 m hcl?

2. How will damage to the adrenal medulla affect the individual? Select the best prediction(s).

erastovalidia [21]

Answer:

F,A

Explanation:

3 0

3 years ago

Using the accompanying chart, calculate the volume of a Densities of Group 14 Elements tin block that has a mass of 95.04 grams

saw5 [17]

<u>Answer:</u> The volume of given mas of tin block at STP is $13.0cm^3$

<u>Explanation:</u>

To calculate volume of of the substance, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

We are given:

Mass of tin = 95.04 g

Density of tin = $7.31g/cm^3$

Putting values in above equation, we get:

$7.31g/cm^3=\frac{95.04g}{\text{Volume of tin}}\\\\\text{Volume of tin}=\frac{95.04g}{7.31g/cm^3}=13.0cm^3$

Hence, the volume of given mas of tin block at STP is $13.0cm^3$

5 0

4 years ago

What are some indicators of rusting? Check all that apply. production of light color change formation of a solid formation of a

sleet_krkn [62]

Answer:

Some indicators of rusting include:

a. color change

b. formation of as solid

Explanation:

Rusting is a redox ( a reaction in which reduction and oxidation occur concurrently) reaction which occcur when metallic iron is exposed to air and water or water vapor reacts with the oxygen and water to form a hydrated mixture of oxides of the metal.

The shiny metallic iron becomes oxidized to Fe²⁺ and Fe³⁺ ions while neutral oxygen gas molecules are reduced to O²⁻ ions. The shiny metallic iron also loses its lustrous appearance as the process proceeds and is covered by a layer of rust.

The equation for reaction is given below:

4Fe(s) + 30₂(g) + xH₂O(l) -----> 2Fe₂O₃. xH₂O(s)

The product of the reaction above is known as rust and is reddish-brown solid.

Rusting causes iron to become flaky and weak as rust is very light and porous, reducing the strength and appearance of iron which are desirable properties of iron when used in construction. The rusting of iron can lead to damage to automobiles, railings, bridges, and several other iron structures.

4 0

3 years ago

Read 2 more answers

If a propane heater burns 38.95 g C3H8, it consumes?

AVprozaik [17]

The balanced chemical reaction will be:

C3H8 + 5O2 = 3CO2 +4H2O

We are given the amount of propane gas to be burned. This will be our starting point.

<span>38.95 </span><span>g C3H8 ( 1 mol C3H8 / 44.1 g C3H8 ) ( 5 mol O2/1 mol C3H8)(32 g O2 / 1 mol O2) =141.32 g O2

Therefore, the reaction consumes approximately 142 grams of oxygen gas.</span>

5 0

3 years ago

Read 2 more answers

You dissolve NH&CN in water. Will the resulting solution be acidic or basic? You need to explain your answer using the appro

Advocard [28]

NH₄CN is a salt formed from weak base NH₄OH and weak acid HCN so that it undergoes complete hydrolysis

<h3>Further explanation</h3>

The hydrolysis process is a term used for the reaction of substances with water

There are 3 types of hydrolysis salts

1.Salt from strong acids and strong bases does not undergo hydrolysis so that the pH of the neutral solution = 7

2.Salt from strong acids and weak bases (pH <7) or from strong bases and weak acids (pH> 7) will be partially / partially hydrolyzed

3.Salt from weak acids and weak bases (pH depends on the value of Ka and Kb) will be completely hydrolyzed

NH₄CN is a salt formed from weak base NH₄OH and weak acid HCN so that it undergoes complete hydrolysis

NH₄OH + HCN⇒NH₄CN+H₂O

Can be formulated :

$\tt [H^+]=\sqrt{\dfrac{Kw\times Ka}{Kb} }$

Ka> Kb then [H +]> 7 and pH <7 ⇒ acidic

Ka <Kb then [H +] <7 or pH> 7 ⇒alkaline

Ka = Kb then pH = 7 ⇒neutral

3 0

3 years ago