All categories

3 years ago

Na-23 has 12 neutrons.what is its atomic number? A.11 B.12 C.23 D.34

1 answer:

4 0

Google says 11 lol full google answer:

Sodium-23 atom is the stable isotope of sodium with relative atomic mass 22.989770, 100 atom percent natural abundance and nuclear spin 3/2. A member of the alkali group of metals. It has the atomic symbol Na, atomic number 11, and atomic weight 23.

You might be interested in

Convert 44.8 liters of CO2 into particles of CO2

jonny [76]

Answer:

1.2044 x 10^24 particles

Explanation:

Assuming this is<u> STP</u>....then this is 2 moles ( each mole = 22.4 L/mole)

2 moles = 2 * 6.022 x 10^23 = 1.2044 x 10^24

5 0

1 year ago

A balloon is floating around outside your window. The temperature outside is -1 ∘C , and the air pressure is 0.700 atm . Your ne

Vladimir79 [104]

Answer:

The volume inside the balloon is = 121 $m^{3}$

Explanation:

Temperature T = - 1 °c = 272 K

Pressure = 0.7 atm = 71 k pa

No. of moles = 3.8

Mass of the gas inside the volume = 3.8 × 4 = 15.2 kg

From ideal gas equation

P V = m R T

Put all the values in above formula we get

71 × V =15.2 × 2.077 × 272

V = 121 $m^{3}$

Therefore the volume inside the balloon is = 121 $m^{3}$

6 0

3 years ago

Read 2 more answers

What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should

horsena [70]

Answer:

$J_{m} = 20$

$J_{m} = 22.5$

Explanation:

From the question we are told that

The first temperatures is $T_1 = 25^oC = 25 +273 =298 \ K$

The second temperature is $T_2 = 100^oC = 100 +273 = 373 \ K$

Generally the equation for the most highly populated rotational energy level is mathematically represented as

$J_{m} = [ \frac{RT}{2B}] ^{\frac{1}{2} } - \frac{1}{2}$

Here R is the gas constant with value $R =8.314 \ J\cdot K^{-1} \cdot mol^{-1}$

Also

B is given as $B=\ 0.244 \ cm^{-1}$

Generally the energy require per mole to move 1 cm is 12 J /mole

So $0.244 \ cm^{-1}$ will require x J/mole

$x = 0.244 * 12$

=> $x = 2.928 \ J/mol$

So at the first temperature

$J_{m} = [ \frac{8.314 * 298 }{2* 2.928 }] ^{\frac{1}{2} } - 0.5$

=> $J_{m} = 20$

So at the second temperature

$J_{m} = [ \frac{8.314 * 373 }{2* 2.928 }] ^{\frac{1}{2} } - 0.5$

=> $J_{m} = 22.5$

3 0

3 years ago

How many ounces are in a 2-liter of soda? Just out of curiousity?

tamaranim1 [39]

There are 67.6 ounces in a 2-liter soda.

6 0

3 years ago

The energy needed to destabilize existing chemical bonds and start a chemical reaction is called ____.

postnew [5]

<span>If all chemical reactions that release free energy tend to occur spontaneously,why haven't all such reactions already occurred? One reason is that most reactions require an input of energy to get started.Before it is possible to form new chemical bonds,even bonds that contain less energy,it is first necessary to break the existing bonds,and that takes energy.The extra energy required to destabilize existing chemical bonds and initiate a chemical reaction is called activation energy.</span>

3 0

2 years ago