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3 years ago

Which element has the greatest density at STP?

Chemistry

1 answer:

son4ous [18]3 years ago

8 0

Answer: Option (4) is the correct answer.

Explanation:

It is known that density is mass divided by volume.

Mathematically, Density = $\frac{mass}{volume}$

Since, density is directly proportional to mass. So, more is the mass of an element more will be its density.

Mass of magnesium is 24.305 g/mol.

Mass of barium is 137.327 g/mol.

Mass of beryllium is 9.012 g/mol

Mass of radium is 226 g/mol.

Hence, radium has more mass therefore it will have the greatest density at STP.

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In the fall, how does the high pressure area<br> affect the hurricane?

tangare [24]

Answer:

Hurricanes occur when ocean water warms during the spring, summer and early fall.

Explanation:

Warm air just above the water’s surface rises. The rising warm air creates a reduction in pressure at the surface, what meteorologists call a low-pressure area. Because nearby air is at a higher pressure, it will flow into the low-pressure zone.

https://www.sidmartinbio.org/how-does-a-high-pressure-system-affect-a-hurricane/

3 0

3 years ago

What is the freezing point of an aqueous solution that boils at 105.4 ∘c?

Schach [20]

Answer : -19.6

Explanation : We can calculate this using the combine equation of boiling point and depression in freezing point and obtain a combined equation which is

∆T(f) = ∆T(b) x {K(f) / K(b)} ;

Where ∆T(f) is depression in freezing point,

∆T(b) is elevation in boiling point,

K(f) is cryoscopic constant for water it is 1.86

K(b) is ebullioscopic constant for water it is 0.512

So we can solve the equation,

∆T(f) = (105.4 -100) X $\frac{1.86}{0.512}$ = 19.6

So when we have the freezing point depression as 19.6,

we know water freezes at 0° C so the freezing point will be 0 - 19.6 = -19.6 °C

6 0

4 years ago

Many metals undergo a single displacement reaction with hydrogen chloride (a strong acid, HCl). One example is magnesium, Mg. Th

Vesnalui [34]

Answer:

Mg(s) + 2HCl(aq) → MgCl2(s) + H2(g)

Explanation:

Many metal undergo displacement reaction . The most reactive metal will displace the less reactive metal from it compound. A single displacement reaction is a reaction in which one element displaces another in it compound.

Many metal undergo displacement reaction with hydrogen chloride . One example is magnesium. Magnesium will displace hydrogen in hydrogen chloride because it is more reactive than hydrogen. The displacement reaction is as follow

Mg(s) + HCl(aq) → MgCl(s) + H2(g). The balanced equation with the simplest whole number ratio is as follows

Mg(s) + 2HCl(aq) → MgCl2(s) + H2(g)

4 0

3 years ago

Mass of flask and stopper: 32.276g

Alex73 [517]

A) Flask+stopper=32.276g
Flask+stopper+liquid=57.235g
57.235-32.276=24.959
Hope this helps im working on the others will out answer in comments

7 0

4 years ago

How does granite differ from gabbro in coloring and

svetoff [14.1K]

Explanation:

Igneous rocks are formed by the crystallisation of a magma. The difference between granites and basalts is in silica content and their rates of cooling. A basalt is about 53% SiO2, whereas granite is 73%. Intrusive, slowly cooled inside the crust.

8 0

3 years ago