Answer:
6. protons, mass number from the atomic number
7. Li= ,
- The force acting on the box is 27N
- The acceleration of the car is 0.30 m/s²
- The object's mass is 2 kg
<h3>Newtons 2nd law </h3>
From Newton's second law,
F = ma
Where F is the force
m is the mass
and a is the acceleration
Q.1
Here, we are to determine the force acting on the box
m = 3 kg
a = 9 m/s²
Using the formula,
F = ma
F = 3 × 9
F = 27N
Hence, the force acting on the box is 27N
Q.2
Here, we are to determine the acceleration of the car
m = 780 kg
F = 235 N
Using the same formula,
F = ma
235 = 780 × a
a = 235 / 780
a = 0.30 m/s²
Hence, the acceleration of the car is 0.30 m/s²
Q.3
Here, we are to determine the object's mass
a = 5 m/s²
F = 10 N
Using the same formula,
F = ma
10 = m × 5
m = 10 / 5
m = 2 kg
Hence, the object's mass is 2 kg
Learn more on Newton's 2nd law here: brainly.com/question/13839211
#SPJ1
Use the ideal gas law: PV = nRT, and solve for T,
T = PV/nR.
We should convert any of our parameters to units that would be easy to use with a known R value. One option would be to have the pressure in atm, volume in L, and convert the mass of the hydrogen gas to moles:
P = 1.2 atm
V = 750 mL = 0.750 L
n = (0.30 g H2)/(2.0159 g/mol) = 0.1488 mol H2
R = 0.0821 L•atm/mol•K.
Solving for T,
T = (1.2 atm)(0.750 L)/(0.1488 mol H2)(0.0821 L•atm/mol•K) = 73.671 K.
If you opt to leave your temperature in Kelvin, I would go with 74 K, as that has two significant figures like the rest of the values.
If you opt to go with Celsius, then the answer would be a bit awkward if you had to follow two sig figs: 73.671 - 273.15 = -199.49 ≈ -2.0 × 10² °C.
Pick your poison, I suppose.