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3 years ago

What is a material which cannot be broken down or changed into another substance using chemical matters?

1 answer:

5 0

Elements cannot be broken down in this fashion.

Compounds, homogeneous mixtures, and heterogeneous mixtures can be broken down or separated with chemical processes, or in some cases, just by manual separation.

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HELP ASAP PLEASE!!!

sveticcg [70]

1. Pure substances cannot be separated into any other kinds of matter, while a mixture is a combination of two or more pure substances.

2. A pure substance has constant physical and chemical properties, while mixtures have varying physical and chemical properties (i.e., boiling point and melting point).

3. A pure substance is pure, while a mixture is impure.

4 0

3 years ago

In a titration of 47.41 mL of 0.3764 M ammonia with 0.3838 M aqueous nitric acid, what is the pH of the solution when 47.41 mL +

Volgvan

Answer: The pH of the solution is 1.136

Explanation:

To calculate the moles from molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

For ammonia:

Molarity of ammonia = 0.3764 M

Volume of ammonia = 47.41 mL = 0.04741 L (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$0.3764mol/L=\frac{\text{Moles of ammonia}}{0.04741L}\\\\\text{Moles of ammonia}=0.01784mol$

For nitric acid:

Molarity of nitric acid = 0.3838 M

Volume of ammonia = (47.41 + 10.00) mL = 57.41 mL= 0.05741 L

Putting values in above equation, we get:

$0.3838mol/L=\frac{\text{Moles of nitric acid}}{0.05741L}\\\\\text{Moles of nitric acid}=0.02203mol$

After the completion of reaction, amount of nitric acid remained = 0.022 - 0.0178 = 0.0042 mol

For the reaction of ammonia with nitric acid, the equation follows:

$NH_3+HNO_3\rightarrow NH_4NO_3$

At $t=0$ 0.0178 0.022

Completion 0 0.0042 0.0178

As, the solution of the reaction is made from strong acid which is nitric acid and the conjugate acid of weak base which is ammonia. So, the pH of the reaction will be based totally on the concentration of nitric acid.

To calculate the pH of the reaction, we use the equation:

$pH=-\log[H^+]$

where,

$[H^+]=\frac{0.0042mol}{0.05741L}=0.0731M$

Putting values in above equation, we get:

$pH=-\log(0.0731)\\\\pH=1.136$

Hence, the pH of the solution is 1.136

8 0

3 years ago

Plz help im begging

vladimir2022 [97]

Answer:

A. glass and diamond

Explanation:

7 0

3 years ago

Convert 11.03 moles of calcium nitrate to grams

hichkok12 [17]

Im pretty sure the answer is 0.01218859659g

not 100% sure tho so please consult someone else b4 answering
i hope this helps!!

6 0

3 years ago

Read 2 more answers

Tengo que resolver con procedimiento

zzz [600]

Answer:

Distance = 200 km

Distance = 204 km

Speed = 77 km/h

Time = 21.42 h

Explanation:

Given:

Speed = 100 km/h , Time = 2 h

Find:

Distance

Speed = 68 km/h , Time = 3 h

Find:

Distance

Distance = 154 km , Time = 2 h

Find:

Speed

Distance = 1500 km speed = 70 km/h

Find:

Time

Computation:

Speed = distance / time

Distance = 100 x 2

Distance = 200 km

Distance = 68 x 3

Distance = 204 km

Speed = 154 / 2

Speed = 77 km/h

Time = 1500 / 70

Time = 21.42 h

6 0

3 years ago