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alexdok [17]
3 years ago
12

What is the isotopic notation for phosphorus

Chemistry
1 answer:
den301095 [7]3 years ago
3 0

Answer:

Name Phosphorus

Symbol P

Atomic Number 15

Atomic Mass 30.974 atomic mass units

Number of Protons 15

Explanation:

You might be interested in
How many moles are there in 8.94*10^24 atoms P?
IgorC [24]

Answer:

<h2>14.85 moles </h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{8.94 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\   = 14.850498

We have the final answer as

<h3>14.85 moles</h3>

Hope this helps you

7 0
3 years ago
Read 2 more answers
What begins the combustion phase of a four-stroke engine cycle? A B C D​
vesna_86 [32]

Answer: D

Explanation: The engine cycle begins with the intake stroke as the piston is pulled towards the crankshaft (to the left in the figure). The intake valve is open, and fuel and air are drawn past the valve and into the combustion chamber and cylinder from the intake manifold located on top of the combustion chamber.

6 0
3 years ago
Read 2 more answers
Classify each of the following substances:
Keith_Richards [23]

Explanation:

Carbon dioxide is a polar molecule whose positive center is on the carbon atom: This positive center is able to attract (and accept) the lone electron pairs present on the oxide ion (O2-). carbon dioxide is acts as a Lewis acid

A Lewis acid can accept a pair of electrons from a Lewis base. The boron in BF3 is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid. A Lewis acid is defined as an electron-pair acceptor.

In CO molecule, there is a lone pair on both carbon and oxygen. The substance which can donate an electron pair are called Lewis base. It is clear that CO molecule can donate an electron pair and hence, it is a Lewis base. Also, CO can be BOTH a Lewis acid and base.

Oxygen is a Lewis base (that too a weak one), not a Lewis acid. REASON: It has lone pair of electrons, which can be donated to electron-deficient species (Lewis acids).

Methane is Neither a Lewis Acid or Lewis Base.

5 0
3 years ago
A cube of copper metal has a density of 8.96 g/cm3. The cube has a mass of 29.54 g. The atomic radius of a copper atom is 1.28 a
hichkok12 [17]

Answer:

The answer to your question is:  3.745 x 10 ²³ atoms

Explanation:

Data

density = 8.96 g/cm³

mass = 29.54 g

atomic radius = 1.28 A° 1.28 x 10⁻¹⁰ m

Volume of a cube

                              density = mass / volume

                              volume = mass / density

                              volume = 29.54 / 8.96

                              volume = 3.29 cm³

Volume of a copper atom

                              volume = (4/3) πr³

                              volume = (4/3) π (1.28 x 10 ⁻⁸)³

                                           = 8.784 x 10 ⁻²⁴ cm³

Number of atoms = 3.29 cm³ / 8.784 x 10 ⁻²⁴ cm³

                             = 3.745 x 10 ²³ atoms

8 0
4 years ago
Determine the freezing point depression of 2 kg of water when 2 mol salt is added to it. The kf of water is 1.86 degrees C/M. Sh
Svet_ta [14]

Answer: The freezing point depression is 1.86^0C

Explanation:

Depression in freezing point is given by:

\Delta T_f=K_f\times m

\Delta T_f = Depression in freezing point

K_f = freezing point constant = 1.86^0C/m

m= molality = \frac{\text {moles of solute}}{\text {mass of solvent in kg}}=\frac{2mol}{2kg}=1m

\Delta T_f=1.86mol/kg^0C\times 1m  

\Delta T_f=1.86^0C  

Thus freezing point depression is 1.86^0C

3 0
3 years ago
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