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nekit [7.7K]
2 years ago
11

The isotope 65Cu2+ has how many electrons and how many protons?

Chemistry
2 answers:
Brilliant_brown [7]2 years ago
8 0

29p,36n,27e

i think is the answer

grigory [225]2 years ago
4 0
29 of each is the correct answer
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3 years ago
What pressure, in atmospheres, is exerted on the body of a diver if he is 38 ft below the surface of the water when atmospheric
Talja [164]

The pressure of diver = atmospheric pressure + water pressure

atmospheric pressure = 750 mmHg (as given) = 750 / 760 atm = 0.987 atm

Water pressure is

P = hρg

where

h = height of water = 38 ft

1 ft = 0.3048

38 ft = 11.58 m

ρ = density  = 1000 Kg / m³

g = gravitational constant  = 9.81 m/s2

P = 11.58 X 1000 X 9.81 = 113599.8 Kg / m s^2 Or N /m^2

1 N / m^2 = 1 pa = 9.869 X 10^-6 atm

P = 113599.8 Pa = 1.12 atm

Total pressure = 1.12 + 0.987 atm = 2.107 atm = 2.1 atm (two significant figures)



5 0
3 years ago
PLEASE HURRY I WILL GIVE BRAINLIEST ANSWER
marshall27 [118]
<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2><h2>Question no 1:</h2><h3>CATION:</h3>

Cation is the postively charged unit which is formed by the transfer of one or more electrons. It is attracted towards cathode thus it is called the CATION.

<h2>_____________________________________</h2><h2>Question no 2:</h2><h3>IONIC BOND:</h3>

Ionic bond is the type of bond which is formed between the positive and negative ions. It is mostly formed between the Metals (i.e. group 1 and 2) and Non metals (i.e. mostly group 7). The positive charge on metal is due to the loosing of electron and negative charge on non metal is due to accepting the electron.

<h2>_____________________________________</h2><h2>Question no 3:</h2><h3>POLYATOMIC ION:</h3>

A molecular ion is a covalently bonded set of two or more atoms, that can be considered to behave as a single unit, it also has a charge on it.

<h2>_____________________________________</h2><h2>Question no 4:</h2><h3>CONDUCTIVITY:</h3>

Conductivity is more in liquid than in solid because the conductivity is flow of electron and the movement is less in solid than liquids thus the solid has less conductivity. The liquid has more movement of molecules due to which there is more conductivity.

<h2>_____________________________________</h2><h2>Question no 5:</h2><h3>FORMULA UNIT: </h3>

Formula unit is a emperical formula used to express the ions in ionic compounds. It is the least whole number ratio of the ions present in the ionic compound.

<h2>_____________________________________</h2><h2>Question no 6:</h2><h3>CRYSTAL LATTICE:</h3>

Crystal lattice is the arrangement of atoms, molecules, or ions of a crystal in the form of a three dimensional space lattice.

<h2>_____________________________________</h2><h2>Question no 7:</h2><h3>ANION:</h3>

Anion is the negative charged because It receives one electron from the cations thus becomes negatively charged entity. It is attracted towards the positive anode thus it is called anion.

<h2>_____________________________________</h2><h2>Question no 8:</h2><h3>MOLECULES:</h3>

Ionic bond do not form molecules, They form the ions.

<h2>_____________________________________</h2><h2>Question no 9:</h2><h3>Attraction:</h3>

One type of bonding i.e. ionic bonding is formed by the attraction between the positive and negative ions.

<h2>_____________________________________</h2><h2>Question no 10:</h2><h3>LATTICE ENERGY:</h3>

It is the amount of energy required to change the state of matter.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 /><h3 />
7 0
3 years ago
Find the density if the volume is 15 mL and the mass is 8.6 g. (5 pts)
allsm [11]

Answer:

\large \boxed{\text{0.57 g/mL; 3.7 mL; 6.6 g; 0.366 g/mL}}

Explanation:

1. Density from mass and volume

\text{Density} = \dfrac{\text{mass}}{\text{volume}}\\\\\rho = \dfrac{m}{V}\\\\\rho = \dfrac{\text{8.6 g}}{\text{15 mL}} = \text{0.57 g/mL}\\\text{The density is $\large \boxed{\textbf{0.57 g/mL}}$}

2. Volume from density and mass

V = \text{9.7 g}\times\dfrac{\text{1 mL}}{\text{2.6 g}} = \text{3.7 mL}\\\\\text{The volume is $\large \boxed{\textbf{3.7 mL}}$}

3. Mass from density and volume

\text{Mass} = \text{4.1 cm}^{3} \times \dfrac{\text{1.6 g}}{\text{1 cm}^{3}} = \textbf{6.6 g}\\\\\text{The mass is $\large \boxed{\textbf{6.6 g}}$}

4. Density by displacement

Volume of water + object = 24.6 mL

Volume of water                =<u> 12.8 mL</u>

Volume of object               = 11.8 mL

\rho = \dfrac{\text{4.3 g}}{\text{11.8 mL}} = \text{0.36 g/mL}\\\text{The density is $\large \boxed{\textbf{0.36 g/mL}}$}

Your drawing showing water displacement using a graduated cylinder should resemble the figure below.

 

6 0
3 years ago
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