Answer:
Acceleration is :
a = 2.89 m/s2
Explanation:
Acceleration : It is the change in the velocity of the object per unit time.
The object starts from the rest , so the initial velocity of the object is zero.
Initial velocity , u = 0
Final velocity = 100 km/h
Change the velocity to m/s because[ time unit is in second(9.60 s)]
1 km = 1000 m
1 hour = 60 x 60 sec = 3600 sec
v = 27.78 m/s
u = 0 m/s
time = 9.60 s
The acceleration"a" is calculated using :
Answer:
The answer to your question is 0.45 moles
Explanation:
Balanced equation
NH₄NO₃ ⇒ N₂O + 2H₂O
2 ----------- N ----------- 2
4 ------------ H ----------- 4
3 ------------ O ----------- 3
From the balanced equation we know that 1 mol of NH₄NO₃ produces 2 moles of water, so we use proportions to find the amount of NH₄NO₃ required to produce 0.9 moles of water.
1 mol of NH₄NO₃ ------------- 2 moles of water
? -------------- 0.9 moles of water
Use cross multiplication
x =
Simplification
x = 0.9 / 2
Result
x = 0.45 moles of NH₄NO₃
The heat of reaction is 1.8 KJ. A calorimeter is a device used in calorimetry, a procedure for calculating heat capacity and measuring the heat of chemical processes or other physical changes.
<h3>How to calculate calorimeter?</h3>
- A calorimeter is a device used in calorimetry, a procedure for calculating heat capacity and measuring the heat of chemical processes or other physical changes.
- Among the most popular kinds are differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters, and accelerated rate calorimeters.
- Calorimeter, a tool for estimating a material's heat capacity and measuring the heat produced during a mechanical, electrical, or chemical reaction. bomb thermometer.
Volume of water = 67.9 mL
Since the density of water is 1.00 g/mL
Density = mass/volume
Mass of water = Density × volume
Mass of water = 1 g/mL × 67.9 mL
Mass of water = 67.9g or 0.0679 Kg
Temperature change = 6.5 oC
Specific heat capacity of water= 4.184 J/Kg
From;
H = mcθ
m = mass of water
c = heat capacity of water
θ = temperature rise
Substituting values;
H = 0.0679 Kg × 4.184 J/Kg × 6.5 oC
H = 1.8 KJ
To learn more about calorimeter refer to:
brainly.com/question/1407669
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Answer: The mass of metallic silver produced by a 1.50
amp current passed through a solution of silver nitrate for 20 minutes is 2.0 g
Explanation:
Moles of electron = 1 mole
According to mole concept:
1 mole of an atom contains number of particles.
We know that:
Charge on 1 electron =
Charge on 1 mole of electrons =
To calculate the time required, we use the equation:
where,
I = current passed = 1.50 A
q = total charge = ?
t = time = 20 minutes = 1200 s (1min=60 s)
Putting values in above equation, we get:
According to stoichiometry:
1 mole of electrons deposit = 108 g of silver
i.e 96500 C of electricity deposit = 108 g of silver
Thus 1800 C of electricity deposit = g of silver
The mass of metallic silver is 2.0 g