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3 years ago

I would like a list of random, interesting facts about Francium.

1 answer:

6 0

<span>It has the highest equivalent weight of all elements.
</span><span>Prior to its discovery, it was simply referred to as eka-caesium.
</span><span>The most stable isotope, Fr-223, has the longest half-life at 21.8 minutes.
</span><span>Francium has thirty-four known isotopes, with only two of them occurring in nature.
</span><span>It is the most unstable of all elements that occur naturally.
</span>Hope this helps.

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If the pressure on a 1.04 L sample of gas is doubled at constant temperature, please compute the new volume of gas: __

natulia [17]

Answer:

0.52 L.

Explanation:

Let P be the initial pressure.

From the question given above, the following data were obtained:

Initial pressure (P1) = P

Initial volume (V1) = 1.04 L

Final pressure (P2) = double the initial pressure = 2P

Final volume (V2) =?

The new volume (V2) of the gas can be obtained by using the the Boyle's law equation as shown below:

P1V1 = P2V2

P × 1.04 = 2P × V2

1.04P = 2P × V2

Divide both side by 2P

V2 = 1.04P /2P

V2 = 0.52 L

Thus, the new volume of the gas is 0.52 L.

6 0

2 years ago

A 453 g piece of glass at 25.7∘C is left outside on a sunny day. How much heat must the glass absorb from the sun in order to re

Tju [1.3M]

Answer:

Q = 5555.6J

Explanation:

Mass of glass piece, m = 453g

initial temperature = 25.7°C

temperature to be attained = 40.3°C

⇒change in temperature, Δt = 40.3 - 25.7 = 14.6°C

specific heat of glass, s = 0.840J/g°C

Heat absorbed, Q = msΔt

⇒Q = 453×0.840×14.6 = 5555.592J

⇒<u>Q = 5555.6J</u> (rounded to the nearest tenth)

7 0

3 years ago

Will name Brainliest

noname [10]

Answer:

Explanation:

3 0

3 years ago

A 2.3 kg object has 15 ) of kinetic energy. Calculate its speed.

chubhunter [2.5K]

Answer:

<h3>The answer is option D</h3>

Explanation:

To find the speed given the kinetic energy and mass we use the formula

$v = \sqrt{ \frac{2KE}{m} } \\$

where

m is the mass

v is the speed

From the question

KE = 15 J

m = 2.3 kg

We have

$v = \sqrt{ \frac{2 \times 15}{2.3} } = \sqrt{ \frac{30}{2.3} } \\ = 3.61157559...$

We have the final answer as

Hope this helps you

7 0

3 years ago

The atomic number of an element gives the number of __ and __in the atom while the mass number gives the total number of__and__

posledela

The atomic number of an element gives the proton and electron in the atom while the mass number gives the total number of protons and neutron

8 0

3 years ago