17 protons 17 electrons 18 neutrons
The correct answer is Three. Solving the given expression we get,
2.524 g (5.1 × 106 g) ÷ (6.85 × 103 g) = 1364.47÷ (6.85 × 103 g) = 1364.47÷ 705.55 = 1.93
Here, the number of significant figures is three. Thus, the result should have three <span>significant figures.</span>
Answer:
a. 50KCal
b. 400KCal
c. Same as (a) above
Explanation:
Given
To raise the temperature of 1kg of liquid water at 1°C requires 1KCal
To raise the temperature of 1kg of ice or water vapour by 1°C requires 0.5KCal
To melt 1kg of ice at 0°C requires 80KCal
To evaporate 1kg of liquid water sitting at 100°C requires 540KCal
a. How much heat is required to raise the temperature of 5 kg of liquid water by 20 C?
To raise the temperature of 5 kg of ice by 20°C requires:
5 kg * (0.5 kcal / kgC) * 20C
= 50 KCal
b. How much heat is required to melt 5 kg of ice at 0 C?
To melt an ice of 5 kg of ice at 0 C requires:
5 kg * (80 kcal / kg)
= 400 KCal
c. Same as (a) above
I think it might be Ecdysozoa but I’m not sure
The statement a) it orbits around the nucleus of an atom. does not describe a proton.
- Protons is known as nucleon and Is found in the nucleus. It doesn't revolve around nucleus of atom.In circular orbits, electrons move around the nucleus.
- In his well-known gold foil experiment from 1911, Ernest Rutherford made the discovery of the atom's nucleus.
- He came to the conclusion that the majority of an atom's volume was empty and that all of the positively charged particles in it were concentrated in a single core.
- The mass of a proton is around 1835 times that of an electron.
- The atomic number is the quantity of protons in an element's nucleus.
- The mass of a proton is 1.6726219 × 10^-27 kilograms.
Proton is embedded inside the nucleus of atom along with neutron and electron revolve around the nucleus in fixed orbit.
Learn more about proton here: brainly.com/question/28023882
#SPJ9
