Answer:
Thus, molar volumes of the liquids are expected to be closer to those in the "solid state."
Explanation:
Anything which occupies mass is known as the matter and we know that matter is existed in three states i.e. solid, liquid and gas. The atoms in the solid are closely packed and therefore, they posses very less kinetic energy. The atoms in liquid state are less closely packed and possess more kinetic energy in comparison to the solid state. The atoms in the gaseous state are loose and possess maximum kinetic energy. The molar volume is the volume occupied by 1 mole of a substance. Solid being compressed will have lesser volume in comparison to the liquid and liquid will have lesser volume in comparison to the gas.
In the solid state, it is expected that the amount of empty space is less than that of the gaseous state, and molar volumes are influenced by molecular characteristics. Thus, solid state molar volumes are not similar to those in the gaseous state. When, comparing empty space in the liquid state, it is expected that space in the liquid phases is less than space in the gaseous phase and equivalent to space to the solid state. Thus, molar volumes of the liquids are expected to be closer to those in the solid state.
Explanation:
Solution 86P
Here, we have to determine the amount of sodium hydroxide required to precipitate all of the Mg.
Mg2+(aq) +2 NaOH(aq) ------> Mg(OH)2 (s) + 2Na+(aq)
Therefore
Molar mass of NaOH =39.997 g/mol
Molar mass of Mg =24.305 g/mol
Thus,the conversion factors
g NaOH(aq)= mol NaOH(aq) = g Mg = mol Mg
Thus the amount of sodium hydroxide required
= 88.4 mg of Mg x x x x...
Answer:
It's all about understanding the concept, see my explanation.
Explanation:
A ionic bond is formed between a metal element and a non metal element always. On the other hand, a molecular bond or covalent bond is formed between 2 elements which are both non metals. A ionic bond is made when there is a electron transfer occurring meaning that one element is giving it's electron to another to ethier become a postive or negative ion. Whereas a molecular bond is made when two non metals elements share there electrons.
• An example of a ionic bond would be MgCl2 as we know magnesium is a metal and chlorine is a non metal.
• An example of a molecular bond would be NF
which we know are both non metals.
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Answer:</h3>
Lead-205 (Pb-205)
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Explanation:</h3>
<u>We are given;</u>
We are supposed to identify its product after an alpha decay;
- Polonium-209 has a mass number of 209 and an atomic number of 84.
- When an element undergoes an alpha decay, the mass number decreases by 4 while the atomic number decreases by 2.
- Therefore, when Po-209 undergoes alpha decay it results to the formation of a product with a mass number of 205 and atomic number of 82.
- The product from this decay is Pb-205, because Pb-205 has a mass number of 205 and atomic number 82.
- The equation for the decay is;
²⁰⁹₈₄Po → ²⁰⁵₈₂Pb + ⁴₂He
- Note; An alpha particle is represented by a helium nucleus, ⁴₂He.
Answer:
Element.
Explanation:
Aluminum is an element because it is not separable into simpler substances. One thing important to keep in mind is that if something is on the Periodic Table of Elements, it is 100% an element.