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3 years ago

When in history was the origin of Sci-Fi as genre? Why then?

Chemistry

1 answer:

sergejj [24]3 years ago

4 0

Answer:

The term science fiction was popularized, if not invented, in the 1920s by one of the genre's principal advocates, the American publisher Hugo Gernsback. The Hugo Awards, given annually since 1953 by the World Science Fiction Society, are named after him.

Explanation:

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Medical implants and high-quality jewelry items for body piercing are frequently known by a trade name, G23Ti, which means "surg

mrs_skeptik [129]

Answer:

Ti6Al4V1 or Ti6Al4V

Explanation:

So, from the question above we are given the following Important data or parameters or information which is going to help us in solving this question and they are;

The "surgical-grade" titanium is made up of 64.3% titanium, 24.19% aluminum and 11.42% vanadium.

This is a stoichiometry Question so in order to be able to solve this question one must have the basic knowledge of stoichiometry, it is advisable that one revise it.

So, let us delve right into the solution of this question. Recall that, the formula for Calculating the number of moles = mass/molar mass.

Hence, the number of moles of titanium,Ti = 64.3/47.87 = 3 moles.

Also, the number of moles of aluminum = 24.19/26.98 = 0.8966

For vanadium; 11.42/51 = 0.22

The next step is to divide each number of moles component by the lowest number of mole, that is;

Ti = 1.34/ 0.22 = 6; Al = 0.8966/0.22= 4 and V = 0.22/0.22 = 1.

Thus, the emperical formula is = Ti6Al4V.

7 0

3 years ago

Calculating molarity using solute moles A chemist prepares a solution of sodium chloride (NaCl) by measuring out 6.89 mol of sod

hram777 [196]

Answer: Concentration of the chemist's sodium chloride solution is 34.4 mol/L.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n= moles of solute

$V_s$ = volume of solution in ml

Given : moles of $NaCl$ = 6.89

volume of solution = 200 ml

Putting in the values we get:

$Molarity=\frac{6.89\times 1000}{200}=34.4mol/L$

Thus the concentration of the chemist's sodium chloride solution is 34.4 mol/L.

7 0

3 years ago

Is phosphorus tribromide a covalent compounds or ionic compounds

daser333 [38]

Phosphorus tribromide is a covalent compound because they share electron pairs.

6 0

3 years ago

a cylinder with a movable piston contains 250 cm3 air at 10°C. if the pressure is kept constant, at what temperature would you e

soldi70 [24.7K]

Answer:

T₂ = 169.89 K

Explanation:

Given data:

Initial volume = 250 cm³

Initial temperature = 10°C (10+273.15 K = 283.15 K)

Final temperature = ?

Final volume = 150 cm³

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂/V₁

T₂ = 283.15 K × 150 cm³ / 250 cm³

T₂ = 42472.5 K. cm³ / 250 cm³

T₂ = 169.89 K

5 0

3 years ago

What do scientists use to increase the surface area of a solute?

mojhsa [17]

<span>use a mortar & pestle to grind the solute into smaller particles, thus increasing the surface area.</span>

5 0

3 years ago

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