Answer:
Cause/ effect relationship.
Explanation:
because the force is the cause of energy that is present and velocity is the effect (speed) that is present.
In chemistry, the elements that exist with electrical charges are called ions. These ions can carry a positive charge, for which they are called cations, or a negative charge, for which they are called anions. These ions carry an electric charge because they do not conform to the stable number of electrons of their neutral atom. Because of this, they carry excess electrons for cations, and a lack of electrons for the anions.
When cations and anions form together such that there is a complete transfer of electrons so that each ion would be neutral, an ionic bond is formed. If you write the reaction, the superscripts and subscripts would just cross-multiply. If the cation is A⁺ᵃ, and the anion is B⁻ˣ, then the ionic compound would then be AₓBₐ. Of x=a, then they will cancel out which will yield AB. Therefore, the ionic compound for each pair of ions are:
NH₄⁺ + OH⁻ = NH₄OH
Mg²⁺ + CO₃²⁻ = MgCO₃
Fe³⁺ + PO₃⁴⁻ = Fe₄(PO₃)₃
Water can change it's STATE but it will not change it's COMPOUND.
<u>Answer:</u> The correct answer is Option C.
<u>Explanation:</u>
Oxides are formed when a metal or a non-metal reacts with oxygen molecule. There are two types of oxides which are formed: Acidic oxides and basic oxides.
Acidic oxides are formed by the non-metals.
Basic oxides are formed by the metals.
From the given options:
- <u>Option 1:</u>
Sulfur is the 16th element belonging to Group 16 and period 3 of the periodic table. This is a non-metal and will form acidic oxide.
- <u>Option 2:</u>
Carbon is the 6th element belonging to Group 14 and period 2 of the periodic table. This is a non-metal and will form acidic oxide.
- <u>Option 3:</u>
Potassium is the 19th element belonging to Group 1 and period 4 of the periodic table. This is a metal and will form basic oxide.
- <u>Option 4:</u>
Phosphorus is the 15th element belonging to Group 15 and period 3 of the periodic table. This is a non-metal and will form acidic oxide.
- <u>Option 5:</u>
Sulfur is the 16th element belonging to Group 16 and period 3 of the periodic table. This is a non-metal and will form acidic oxide.
Hence, the correct answer is Option C.
0.25 moles of water (H₂O)
Explanation:
To calculate the number of moles of a particular substance we use the following formula:
number of moles = mass / molecular weight
molecular wight of water (H₂O) = number of H atoms × atomic weight of H + number of O atoms × atomic weight of O
molecular wight of water (H₂O) = 2 × 1 + 1 × 16 = 18 g/mol
number of moles of water (H₂O) = 4.5 / 18
number of moles of water (H₂O) = 0.25 moles
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