Assuming that the ammonium sulfide formula is (NH4)2S then you can see that there are 2 nitrogen, 8 hydrogen and 2 sulfur atoms for every ammonium sulfide. If the amount of ammonium sulfide is 8.9 moles, then the number of hydrogen atoms should be: 8/1 * 8.9 mol= 71.2 moles
Answer:
The two statements are all True for group 7 and 8 elements.
Explanation:
The Group 7 elements are known as the halogens. They are reactive non-metals and are always found in compounds with other elements. Chlorine, bromine and iodine are all halogens.
Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means 'salt former'.
In addition to the discription given to norble gases in the question which is true, norble gases;
- are inert gases located on the right of the periodic table.
- have a full-set of valence electrons, so they're stable, unreactive
- are colorless, odorless and tasteless.
- have low melting and low boiling points.
- can be found in small amounts in the Earth's crust and the Earth's atmosphere.
Because fluorine has a higher electronegativity
Answer: 5.3 x 10^24 formula units of silver nitrate is equivalent to 8.8 moles of silver nitrate. Silver nitrate is an ionic compound, therefore, its representative particle is called a "formula unit" instead of molecule. For every mole of a substance, we know that there are 6.022 x 10^23 representative units of that substance. The amount of particles in one mole of substance is called Avogadro's number.
Further Explanation:
We can convert from number of representative particles to moles using the formula:
For this problem, we can calculate the number of moles by plugging in the given values to the equation above,
Learn More
- Learn more about representative particles brainly.com/question/8969313
- Learn more about Avogadro's number brainly.com/question/229300
- Learn more about mole conversions brainly.com/question/1370888
Keywords: moles conversion, Avogadro's number
Fog is a cloud that has its base at or near the ground.
The answer is letter D. Fog results when atmospheric water vapor condenses to
the extent that the new forms, water droplets or ice crystals, become visible. Saturation
of the air and sufficient condensation nuclei are ordinarily prerequisites for
the formation of fog. One of the great hazards associated with fog is a lack of
visibility.
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