CHEMISTRY HIGH SCHOOL

When an atom of the unstable isotope Na-24 decays, it becomes an atom of Mg-24 because the Na-24 atom spontaneously releases:(1) an alpha particle
(2) a beta particle
(3) a neutron
(4) a positron

Answers

Answer 1
Answer: A sodium-24 (Na-24) atom has atomic number 11 and mass 24, while a magnesium (Mg) atom has atomic number 12 and mass 24. Therefore the only change is that a particle with (-1) atomic number and (0) mass must have been released by Na-24 to get Mg-24.
This description fits a beta particle, which has a (-1) atomic number and (0) mass.
Answer 2
Answer: (2) a beta particle, because and atom "moves up" one place in periodic table, and such thing happens when beta decay occurs.

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What song gets you in your feels the most? mines what could've been by gone west

Answers

Answer:def has to be someone you loved by Lewis Capaldi

Explanation:

Answer:someone you loved

I'm going under and this time I fear there's no one to save me

This all or nothing really got a way of driving me crazy

I need somebody to heal

Somebody to know

Somebody to have

Somebody to hold

It's easy to say

But it's never the same

I guess I kinda liked the way you numbed all the pain

Now the day bleeds

Into nightfall

And you're not here

To get me through it all

I let my guard down

And then you pulled the rug

I was getting kinda used to being someone you loved

I'm going under and this time I fear there's no one to turn to

This all or nothing way of loving got me sleeping without you

Now, I need somebody to know

Somebody to heal

Somebody to have

Just to know how it feels

It's easy to say but it's never the same

I guess I kinda liked the way you helped me escape

Now the day bleeds

Into nightfall

And you're not here

To get me through it all

I let my guard down

And then you pulled the rug

I was getting kinda used to being someone you loved

And I tend to close my eyes when it hurts sometimes

I fall into your arms

I'll be safe in your sound 'til I come back around

For now the day bleeds

Into nightfall

And you're not here

To get me through it all

I let my guard down

And then you pulled the rug

I was getting kinda used to being someone you loved

But now the day bleeds

Into nightfall

And you're not here

To get me through it all

I let my guard down

And then you pulled the rug

I was getting kinda used to being someone you loved

I let my guard down

And then you pulled the rug

I was getting kinda used to being someone you loved

the reaction below shows how silver chloride can be synthesized. agno3 nacl nano3 agcl how many moles of silver chloride are produced from 15.0 mol of silver nitrate?

Answers

The balanced chemical reaction is:

AgNO3 + NaCl = AgCl + NaNO3

We are given the amount of silver nitrate to be used for the reaction. This will be the starting point of our calculations. 

15.0 mol AgNO3 ( 1 mol AgCl / 1 mol AgNO3 ) = 15.0 mol AgCl

The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?No, because they have different masses.
No, because they have different volumes.
Yes, because the number of moles is not dependent on the mass or the volume.
Yes, because the number of moles is only dependent on the mass per unit volume.

Answers

Answer: Yes, it is possible for each samples to contain 1 mole of a substance because the number of moles are not dependent on the mass or the volume.

Explanation:

The formula for the number of moles is given by:

\text{number of moles}=\frac{\text{given mass}}{\text{molar mass}}

As, the masses of 2 samples are different, so the number of moles will be dependent only on the molar masses of the samples.

Volume has no effect on the number of moles.
Yes, because the number of moles is not dependent on the mass or the volume.
Different elements and compounds have different molar masses. E.g. a mole of hydrogen would be very different from a mole of gold

The Haber process can be used to produce ammonia (NH3) from hydrogen gas (H2) and nitrogen gas (N2). The balanced equation for this process is shown below. 3H2 N2 Right arrow. 2NH3 The molar mass of NH3 is 17. 03 g/mol. The molar mass of H2 is 2. 0158 g/mol. In a particular reaction, 0. 575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures? 0. 1 0. 102 0. 10209 0. 1021.

Answers

Answer:

B

Explanation:

We are given that ammonia can be produced from hydrogen gas and nitrogen gas according to the equation:

\displaystyle 3\text{H$_2$} + \text{N$_2$} \longrightarrow 2\text{NH$_3$}

We want to determine the mass of hydrogen gas that must have reacted if 0.575 g of NH₃ was produced.

To do so, we can convert from grams of NH₃ to moles of NH₃, moles of NH₃ to moles of H₂, and moles of H₂ to grams of H₂.

We are given that the molar masses of NH₃ and H₂ are 17.03 g/mol and 2.0158 g/mol, respectively.

From the equation, we can see that two moles of NH₃ is produced from every three moles of H₂.

With the initial value, perform dimensional analysis:

\displaystyle \begin{aligned} 0.575\text{ g NH$_3$}& \cdot \frac{1\text{ mol NH$_3$}}{17.03\text{ g NH$_3$}} \cdot\frac{3\text{ mol H$_2$}}{2\text{ mol NH$_3$}} \cdot \frac{2.0158\text{ g H$_2$}}{1\text{ mol H$_2$}} \n \n & = 0.102\text{ g H$_2$}\end{aligned}

*Assuming 100% efficiency.

Our final answer should have three significant figures. (The first term has three, the second term has four (the one is exact), the third term is exact, and the fourth term has five. Hence, the product should have only three.)

In conclusion, our answer is B.

The isotope atoms differ in ?

Answers

An isotope is formed basically when the amount of neutrons are different than the amount of protons in the nucleus. Therefore, we'd get a variation in the atomic mass (number of neutrons and protons). This is what makes isotopes different.

So, the answer would be: Isotope atoms differ in neutrons.

Which most likely would be a new social issue resulting from the installation of a dam? A. Antibiotic resistance

B. Habitat destruction

C. Greater exposure to radiation

D. Increase in biodiversity

Answers

C. Greater exposure to radiation

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