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3 years ago

Question 1 of 32

Chemistry

1 answer:

m_a_m_a [10]3 years ago

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B. increasing the amount of solvent used

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Which of the following represents a synthesis reaction?

bija089 [108]

Answer: a) 2H2 + O2 --> 2H2O

Explanation: 2 compounds are combining to form a new compound. The others have 2 substances as the end result and synthesis only produces one result (2H2O in this case)

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3 years ago

According to the phase diagram for water, how is the state of water determined?

joja [24]

Explanation:

From the attached phase diagram, one can easily make out the phase in which water exists. Matter generally exists in three physical states which are solid, liquid and gas. Water is a unique compound that can exists in these three states at a given temperature and pressure.

From the attached phase diagram,

point O is the triple point where the three phases of pure substance co-exists.
The areas between the curves points at a single phase of matter. Y is a water vapor.
The lines on the curve denotes two equilibrium phases. For example; X is a phase contain ice and melt water.

Learn more:

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#learnwithBrainly

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3 years ago

Read 2 more answers

14. Which of the following is an example of an epeirogenic process?

Talja [164]

Answer:

A large plateau forms in the interior of a continental plate when a large section of the plate rises evenly due to an even expansion of the underlying mantle. B.

6 0

3 years ago

Read 2 more answers

Procaine hydrochloride ( MW = 272.77 g/mol) is used as a local anesthetic. Calculate the molarity of a 4.666 m solution which ha

fenix001 [56]

Answer:

$\boxed{\text{2.274 mol/L}}$

Explanation:

$b = \dfrac{\text{moles of solute}}{\text{kilograms of solvent}}$

Assume 1 kg water.

1. Moles of P.HCl

Then we have 4.666 mol of P.HCl

2. Mass of P.HCl

n = 4.666 mol × 272.77 g/mol = 1271.1 g

3. Total mass of solution

m = 1000 g + 1271.1 g = 2271.1 g solution

4. Volume of solution

$V = \text{2271.1 g} \times \dfrac{\text{1 mL}}{\text{1.1066 g}} = \text{2052.3 mL} = \text{2.0523 L}$

5. Molar concentration

$\begin{array}{rcl}c & = & \dfrac{\text{moles of solute}}{\text{litres of solution}}\\\\c & = & \dfrac{\text{4.666 mol}}{\text{2.0523 L}}\\\\ & = & \text{2.274 mol/L}\\\end{array}\\$

$\text{The molar concentration of the solution is} \boxed{\textbf{2.274 mol/L}}$

5 0

4 years ago

If I have a 30,000 mL container that holds 65 moles of gas at a temperature of 205 degrees Celsius, what is the pressure inside

AnnyKZ [126]

Answer:

85.384 atm or 64608.13086 mmHg

Explanation:

PV= NRT

P= NRT/V

n= mols

R= gas constant (i used .0821 for atm)

T= Temp in Kelvins (Celsius degrees + 273)

V= in L

(65molsx480kx.0821)/30L

4 0

3 years ago