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Fantom [35]
3 years ago
14

See picture attached.

Chemistry
1 answer:
8090 [49]3 years ago
3 0

Answer:

the value of a and b

Explanation:

the value of a and b

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How many atoms are present in 0.10mol of ptcl2 (nh3)2?
serious [3.7K]
The number of atoms  present in 0.10 mol of PtCl2(NH3) is calculated using Avogadro law  formula

that is

1 mole = 6.02 x10^23 atoms
what about 0.10 moles = ? atoms

= 6..02 x10 ^23 x 0.1 = 6.02 x10^22  atoms
3 0
3 years ago
Read 2 more answers
A 2.49 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25
Maslowich

The value of delta H° for aniline = 6415 Kj/mol

<u><em>calculation</em></u>

Step 1: find heat

Q (heat)  =  C (specific heat capacity)  x ΔT (change in temperature)

C= 4.25 kj/c°

ΔT = 69.8-29.5  = 40.3 c°

Q= 4.25 kj/c  x  40.3 c = 171.28 kj

Step 2:  find the moles of aniline

moles  = mass/molar  mass

= 2.49 g/ 93.13 g/mol =0.0267 moles

Step 3:  find delta H

171.28 kj/0.0267 mol = 6415 kj/mol

since the reaction is  exothermic  delta H = 6415 Kj/mol

4 0
2 years ago
Calculate the speed of a wave of frequency 50Hz and wavelength 1m?
frutty [35]

Answer:

50m/s

Explanation:

The formula for calculating speed of wave in relation to frequency and wavelength is

C=λf

Where c is the speed of the wag

λ is the wavelength which is 1m

f is the frequency which is 50Hz

From the formulas,

C= 50X1

C= 50m/s

5 0
3 years ago
The law of conservation of energy describes the total amount of energy in a system. Which statements explain why the conservatio
Advocard [28]
It is a statement of fact. explains how energy is produced, and describes the behavior of energy.
3 0
4 years ago
A gaseous mixture contains 5.0 moles of nitrogen and 10.0 moles of helium . What is the total pressure if the temperature is 25
jolli1 [7]

Answer:

A) 122 atm

Explanation:

PV = nRT

Solve for P --> P = nRT/V

n = 10.0 mol + 5.0 mol = 15.0 mol

R = 0.08206 L atm / mol K

T = 25 + 273 = 298 K

V = 3.0

P = (15.0)(0.08206)(298) / (3.0) = 122 atm

6 0
3 years ago
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