Mass lost = weight of oxygen = 6.75 - 6.12 = 0.63 g
0.63 g / 16.0 g/mole = 0.0394 moles O
6.12 g / 207.2 g/mole = 0.0295 moles Pb
Ratio being roughly 3:4, the empirical formula is Pb3O4 (which is one of the mixed oxides of lead).
Answer:
mv-mu
Explanation:
momentum is the mass by velocity of an object. change in momentum means there was an initial momentum and a final momentum. V represents the final momentum and U represents the initial momentum. So minus the momentum values. (Final momentum (mv) minis initial momentum (mu)
Answer:
4.88 m/s
Explanation:
Utilizing the law of conservation of energy, kinetic energy at the inclined bottom equals to the potential energy at the top hence
and making v the subject of the formula then 
where m represnt the mass of sled, v is the initial speed, g is acceleration due to gravity and h ia the vertical height. Substituting g with 9.81 m/s2 and h with 1.22 then
The motor in the platform works for W=1885J during this process.
<h3>What is joules?</h3>
The amount of energy expended when a force of one newton is applied across a displacement of one meter is known as a joule. A joule is equal to one watt of electricity emitted or lost over the course of one second. The British thermal unit (Btu) is sometimes used to express energy. the work- or energy-measurement unit derived from the SI. The energy required to accelerate a body with a mass of one kilogram over a distance of one meter using one newton of force is equal to one joule. Additionally, one joule is equal to one watt-second.
<h3>What is joules formula?</h3>
The energy required to exert one newton of force through one meter is measured in joules. For instance, the energy required to lift a one-kilogram object one meter is given by E = Fd = (ma)d = mgd = (1 kg)(9.8m/s2)(1 m) = 9.8 kg m/s2 = 9.8 joules.
To know more about Joules visit:
brainly.com/question/25947916
#SPJ4
