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3 years ago

What particles are used to form bonds

Chemistry

2 answers:

zloy xaker [14]3 years ago

8 0

Valence electrons are the particles that make bonds.

jekas [21]3 years ago

5 0

Elements are used to create bonds and are classified as particles.

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Which of the following ions is least likely to form colored compounds?

andreyandreev [35.5K]

Answer:

i think d maybe correct me if im wrong

Explanation:

3 0

3 years ago

A vertical piston-cylinder device contains water and is being heated. During the heating process, 70 kJ of heat is transferred t

nydimaria [60]

Answer:

Energy change = 59. 5 kJ

Explanation:

First, we collect the data:

Let:

Q (supplied) be the energy supplied to the water

Q (lost) be energy lost to surroundings

Q (piston) be the energy possessed by the piston as it moves up

v = volume flow (m³/s)]

V = velocity of the gas (m/s)

mass = 50 kg

Second, calculate the work done by the piston:

to find velocity, we use this formula:

v = A × V

Therefore, V = 0.5 (m³/s)/0.005 m²

= 10 m/s

it means the water is evaporating at a rate of 10 m/s

the evaporating water transfers energy to the piston, kinetic energy Ek

Ek = 1/2 mV²

= 0.5 (50) ( 10) ²

= 2 500 J

= 2.5 kJ

The net energy, ΔQ is given by:

ΔQ (net) = Q (supplied) - Q (piston) - Q (lost)

= 70 - 2.5 -8

=<u> 59.5 kJ Ans</u>

7 0

3 years ago

What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?

saveliy_v [14]

Answer: the momentum is 6 Kgm/s

Explanation:

M= 5 kg

V= 1.2 m/s

Momentum = MV = 5 x 1.2 = 6 Kgm/s

3 0

3 years ago

If 21.00 mL of a 0.68 M solution of C6H5NH2 required 6.60 mL of the strong acid to completely neutralize the solution, what was

Andru [333]

Answer:

pH = 2.46

Explanation:

Hello there!

In this case, since this neutralization reaction may be assumed to occur in a 1:1 mole ratio between the base and the strong acid, it is possible to write the following moles and volume-concentrations relationship for the equivalence point:

$n_{acid}=n_{base}=n_{salt}$

Whereas the moles of the salt are computed as shown below:

$n_{salt}=0.021L*0.68mol/L=0.01428mol$

So we can divide those moles by the total volume (0.021L+0.0066L=0.0276L) to obtain the concentration of the final salt:

$[salt]=0.01428mol/0.0276L=0.517M$

Now, we need to keep in mind that this is an acidic salt since the base is weak and the acid strong, so the determinant ionization is:

$C_6H_5NH_3^++H_2O\rightleftharpoons C_6H_5NH_2+H_3O^+$

Whose equilibrium expression is:

$Ka=\frac{[C_6H_5NH_2][H_3O^+]}{C_6H_5NH_3^+}$

Now, since the Kb of C6H5NH2 is 4.3 x 10^-10, its Ka is 2.326x10^-5 (Kw/Kb), we can also write:

$2.326x10^{-5}=\frac{x^2}{0.517M}$

Whereas x is:

$x=\sqrt{0.517*2.326x10^{-5}}\\\\x=3.47x10^-3$

Which also equals the concentration of hydrogen ions; therefore, the pH at the equivalence point is:

$pH=-log(3.47x10^{-3})\\\\pH=2.46$

Regards!

6 0

3 years ago

If the density of mercury is 13.6g/ml, what is the mass in grams of 3426 ml of the liquid?

valkas [14]

Answer:

Explanation:

Mass=density×volume

Mass=13.6g/ml×3426ml

Mass=46,593.6 g

5 0

3 years ago