The melting points of sugar and salt are above 20°C.
<h3>What is melting point?</h3>
The melting points of substances refer to the temperature at which solid substances gain enough energy to become liquids.
The room temperature is approximately 20°C. At this temperature, sugar and salt are solids. This means that the melting temperature of both substances is above 20°C.
More specifically, sugar will melt around 180 °C while salt will melt at a temperature slightly above 800 °C.
More on melting points can be found here: brainly.com/question/25777663
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The magnet's north pole would point to the Earth's south pole and the magnet's south pole would point to the Earth's north pole.
<u>Explanation</u>:
- There is a magnetic pole in the earth and the magnetic poles of the earth run using the equator and it has both the closures at the arctic pole and the Antarctic pole. The attractive positive field or the north pole is situated in the arctic zone and the south pole is situated in the Antarctic zone.
- The magnetic positive field or the north pole is situated in the arctic zone. Any magnet which is allowed to rotate whenever suspended on the outside of the earth will align itself with the magnetic field of the earth. That is the way the bar magnet orients itself comparative with this current planet's magnetic field.
Answer:
126.18 hr
Explanation:
Data given:
1 mL of water = 20 drops
count rate = 10 drops/s
time in hours for one gallon = ?
Solution:
First we calculate number of mL (milliliter) of water in gallon
As we know
1 gallon = 3785.4 mL
As,
1 galon consist of 3785.4 mL of water, so now we count number of drops that contain 3785.4 mL of water
As we Know 1 mL water contain 20 drops then 3785.4 mL of water contain how many drops:
Apply unity formula
1 mL water ≅ 20 drops
3785.4 mL water ≅ X drops
Do cross multiplication
X drops of water = 20 drops x 3785.4 mL / 1 mL
X drops of water = 75708 drops
So, we come to know that one gallon contain 75708 drops of water and we have to calculate the time in hour to count these drops
First we calculate time in seconds
As we Know 10 drops water count in one second then how many seconds it will take to count 75708 drops
Apply unity formula
1 second ≅ 10 drops
X second ≅ 75708 drops
Do cross multiplication
X second = 1 second x 75708 drops / 10 drops
X second = 7570.8 second
So it take 7570.8 second to count 1 gallon water drops
Now convert seconds to hours
As,
60 seconds = 1 hr
7570.8 second = 7570.8 / 60 = 126.18 hr
So it take 126.18 hr to count 1 gallon water drops.
<u>Answer:</u> Antimony ion is the smallest and yttrium ion is the largest.
<u>Explanation:</u>
Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.
An ion is formed when a neutral atom looses or gains electrons.
- When an atom looses electrons, it results in the formation of positive ion known as cation.
- When an atom gains electrons, it results in the formation of negative ion known as anion.
As moving from left to right in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Hence, the size of an atom decreases.
The size of the cation is small then their neutral atom because it has less number of electrons while its nuclear charge remains the same. Thus, the nucleus attracts the electron more towards itself and leads to the decrease in size.
We are given three cations: 
Yttrium lies in Period 5, group 3 of the periodic table.
Niobium lie in Period 5, group 5 of the periodic table.
Antimony lies in Period 5, group 15 of the periodic table.
So, the order of atomic radii in increasing order follows:
Hence, antimony ion is the smallest and yttrium ion is the largest.
