Explanation:
A cup of mixtures of iron fillings, sand and salt is a mixture who constituents are in the same phase i.e solid.
To separate them out we use the physical properties of the substances.
- First spread out the mixture uniformly over a piece of paper or on the table.
- Pass a bar magnet over it.
- The iron fillings will become attracted to the magnet and separate from the mixture.
- then pour water into the mixture of sand and salt
- the salt will dissolve since sand is made up of quartz which are highly insoluble.
- separate the water solution. Evaporate to dryness and recover the salt.
- the sand is left behind and dried.
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Mixtures brainly.com/question/1832352
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<span>The Representative elements are the first two relations and the last six relations of the Periodic Table. The Transition elements are in three series in periodic table and they all are metals.
therefore,
</span>A) lithium is <span>Representative element
</span>B) platinum isTransition element
C) promethium is<span>Transition element
</span>D) carbon is <span>Representative element</span>
Respiration and or photosynthesis
Answer:
6.67 moles of NH₃
Explanation:
From the equation of reaction,
4NH₃(g) + 7O₂(g) → 4NO₂(g) + 6H₂O(g),
4 moles of NH₃ will produce 6 moles of 6H₂O,
X moles of NH₃ will produce 10 moles of H₂O
X = (10 * 4) / 6
X = 6.67 moles of NH₃
6.67 moles of NH₃ will produce 10 moles of H₂O
