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3 years ago

Which isotope will spontaneously decay and emit particles with a charge of +2?

1 answer:

8 0

(4) 220Fr, known as Francium-220, undergoes alpha decay, which emits an alpha particle, also known as a helium nucleus, which has a charge of +2.

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If an atom has 34 protons, 34 electrons, and 43 neutrons, what is the atomic mass?

icang [17]

Answer:

ATOMIC MASS = Protons + Neutrons

34+43 = 77

Atomic Mass is 77

BRAINLIEST PLEASE

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3 years ago

What are some chemacial changes in your school?

Oksanka [162]

Putting glue on something, because once it is set in you cannot change it back.

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4 years ago

The volume of a gas held at constant temperature varies indirectly as the pressure of the gas. If the volume of a gas is 1200 cu

kvasek [131]

Answer:

Volume of the gas at 500 mm Hg pressure is 960 $cm^{3}$

Explanation:

Let's assume the gas behaves ideally.

According to combined gas law for an ideal gas-

$\frac{P_{1}V_{1}}{T_{1}}=\frac{P_{2}V_{2}}{T_{2}}$

Where $P_{1}$ and $P_{2}$ are initial and final pressure of the gas respectively. $V_{1}$ and $V_{2}$ are initial and final volume of the gas respectively. $T_{1}$ and $T_{2}$ are initial and final temperature of the gas in kelvin respectively.

Here $T_{1}$ = $T_{2}$ , $V_{1}$ = 1200 $cm^{3}$ , $P_{1}$ = 400 mm Hg, $P_{2}$ = 500 mm Hg

So, $V_{2}=\frac{P_{1}V_{1}T_{2}}{T_{1}P_{2}}$

Hence $V_{2}=\frac{400\times 1200}{500}[tex]cm^{3}$ =960 $cm^{3}$ [/tex]

Hence volume of the gas at 500 mm Hg pressure is 960 $cm^{3}$

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4 years ago

How is the energy of an object affected after work is done on it?

pantera1 [17]

Work is done when a force is applied to an object through a distance. ... The object will either speed up or slow down, resulting in a change in its kinetic energy (seen in Figure 1), or it will have an altered potential energy if, for example, it was lifted a certain height under the force of gravity.Jan 31, 2020

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3 years ago

If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for t

bekas [8.4K]

Answer: $O_2$ is considered as the limiting reagent for this reaction.

Explanation:

Limiting reagent is the reagent which limits the formation of the product.

Excess reagent is the reagent which is present in excess in a chemical reaction.

For the combustion of acetylene, the reaction follows:

$2C_2H_2(g)+5O_2(g)\rightarrow 4CO_2+2H_2O$

By Stoichiometry,

5 moles of oxygen gas reacts with 2 moles of acetylene.

So, 81 moles of oxygen gas will react with = $\frac{2}{5}\times 81$ = 32.4 moles of acetylene.

As, the required amount of acetylene is less than the given amount. So, it is considered as an excess reagent and oxygen gas is the limiting reagent.

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4 years ago

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