Answer:
open system
Coffee held in a cup is an open system because it can exchange matter water vapors and energy heat with the surroundings.
The correct formula is H20S4
Answer:
1. Litres
2. minutes
3. Kelvin (K)
4. Kilometer/hour
5. hours
6. Litre
7. metre
8. metre
9. Litres
10. milliliters
Explanation:
1. Coca-Cola is a liquid substance, hence, its volume must be measured in LITRES.
2. This question is related to time I.e. being early, hence, the unit of measurement is MINUTES.
3. The unit of temperature is Kelvin (K). Therefore, water boils at 373K
4. This question is related to speed, whose unit of measurement is kilometer/hour (km/hr).
5. A movie runs with time, which is measured in HOURS.
6. Mineral water is a liquid, which can only be bought per volume. Hence, the appropriate unit is LITRE.
7. Height is measured in metres (m). Therefore, one can say that " the height of your younger brother is 10metres"
8. The length of a substance is also measured in metres.
9. Volume is measured in LITRES
10. Cough syrup is a drug whose volume is quantified by millilitres i.e. a thousandth litre
<h3>0.020 × 1000 × 100</h3>
<h2>= 2000 mg of Sn</h2>
hope that helps !
<em>Answer:</em> an anion will form with -3 charge.
<em>Explanation;</em>
The atomic number of the given atom = 15
Atomic number = number of protons
The number of protons of the given atom = 15
The atomic mass of the given atom = 31
Atomic mass = number of protons + number of neutrons
Hence,
number of neutrons = atomic mass - number of protons
= 31 - 15
= 16
Since, the atomic number is 15, the given atom is P which has the atomic number as 15.
In the neutral compound,
number of protons = number of electrons
Hence,
the number of electrons of the neutral atom = 15
But, the atom has gained 3 electrons.
Gaining of electrons will form anions.
Hence, the atom will be converted into anion which has -3 charge on it.
But the atomic mass, atomic number, number of protons and number of electrons will not be changed
