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Allushta [10]
3 years ago
10

What steps are important in the process of creating a scientific theory?

Chemistry
1 answer:
skelet666 [1.2K]3 years ago
7 0
1. Hypothesize, observe, and test
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How many protons does ^31S have​
eduard

Answer:31

Explanation: Hope this helped.

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3 years ago
Zinc is to be electroplated onto both sides of an iron sheet that is 20 cm2 as a galvanized sacrificial anode. It is desired to
Alexandra [31]

Answer:

The time required for the coating is 105 s

Explanation:

Zinc undergoes reduction reaction and absorbs two (2) electron ions.

The expression for the mass change at electrode (m_{ch}) is given as :

\frac{m_{ch}}{M} ZF = It

where;

M = molar mass

Z = ions charge at electrodes

F = Faraday's constant

I = current

A = area

t = time

also; (m_{ch}) = (Ad) \rho ; replacing that into above equation; we have:

\frac{(Ad) \rho}{M} ZF = It  ---- equation (1)

where;

A = area

d = thickness

\rho = density

From the above equation (1); The time required for coating can be calculated as;

[ \frac{20 cm^2 *0.0025 cm*7.13g/cm^3}{65.38g/mol}*2 \frac{moles\ of \ electrons}{mole \ of \ Zn} * 9.65*10^4 \frac{C}{mole \ of \ electrons }  ] = (20 A) t

t = \frac{2100}{20}

= 105 s

8 0
4 years ago
If I contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K, what is the pressure inside
olasank [31]

Answer:

n = 3.0 moles

V = 60.0 L

T = 400 K

From PV = nRT, you can find P

P = nRT/V = (3.0 mol)(0.0821 L-atm/K-mol)(400 K)/60.0L

P = 1.642 atm = 1.6 atm (to 2 significant figures)

Explanation:

6 0
3 years ago
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-1.09'C is the change in freezing point

“Freezing point depression” depends on the solvent and the molar concentration of the solute.

Sulfide is highly basic, consequently

K2S

completely and irreversibly hydrolyzes in water according to the following equation:

K2S+H2O→KOH+KSH

<h3>What is freezing?</h3>

Freezing, also known as solidification, is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.

the temperature at which a liquid solidifies specifically : the temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure : melting point the freezing point of water is 0° Celsius or 32° Fahrenheit.

Learn more about change in freezing point here:brainly.com/question/23035406

#SPJ10

5 0
2 years ago
What happens when warm air rises? (5 points)
Alika [10]

The movement creates a difference in air pressure.

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3 years ago
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