Answer is: C. nitrogen.
Together, nitrogen (N₂) and oxygen (O₂) by volume account for 99.03% volume of the gases composing the dry air in the lower atmosphere.
Volume of nitrogen in air is 78.08%.
Volume of oxygen in air is 20.95%.
Together: 78.08% + 20.95% = 99.03%.
This gases can be separated by fractional distillation of liquefied air.
(2) CH3CHCH2 and CH3CH2CH3
(3) CH3CHO and CH3COCH3
(4) CH3CH2OH and CH3OCH3
Answer is (4) - CH₃CH₂OH and CH₃OCH₃.
Both CH₃CH₂OH and CH₃OCH₃ have same molecular formula as C₂H₆O. But CH₃CH₂OH is an alcohol and CH₃OCH₃ is an ether.
Although two compounds have a same molecular formula, the atomic arrangement of those compounds differs from each other.
Hence, CH₃CH₂OH and CH₃OCH₃ are isomers of the formula C₂H₆O.
Due to the different arrangement of atoms, both compounds have different chemical and physical properties.
impact our understanding of the universe?
Answer:Atomic theory established that all matter is made of tiny particles, a discovery that led to amazing scientific breakthroughs in areas from modern chemistry to nuclear energy.
Explanation:Atomic theory is the scientific theory that matter is composed of particles called atoms. Atomic theory traces its origins to an ancient philosophical tradition known as atomism.
Answer: subatomic particles: negative charges (electrons) distributed in a mass of positive charge.
Explanation:
1) John Dalton's model depicted the matter as the combination of tiny, indivisible particles, called atoms.
According to this model, atoms can not be created, destroyed, or divided into smaller particles.
2) When it was discovered that all forms of matter contained negative particles, by multiple experiments with cathode ray tubes, those particles where named electrons.
3) J.J. Thompson could determine that the mass of those negative charges was much smaller that the mass of the smallest atom (hydrogen). Concluding that existed smaller particles than the atom. Hence, Dalton's model was wrong: atoms was divisible into smaller subatomic particles.
4) Then J.J Thompson proposed the plum pudding model, in which the electrons (plums) are embeded into a uniform positive mass (pudding).
Answer:
Magnesium also reacts with nitrogen in the air to produce some magnesium nitride (Mg3N2). Safety: Do not look directly at the burning magnesium due to the intensity of the light. A dry-powder fire extinguisher should be available. Disposal: Once cooled the solid magnesium products can be thrown in the trash.
Explanation:
B. The nucleus contains protons and neutrons and is orbited by electrons.
C. Protons, neutrons, and electrons occupy the same spaces within the atom.
D. Protons occupy the center of an atom, with neutrons and electrons circling.
Melted as the snow, seems to me now
As the remembrance of an idle gaud
Answer:
The lines were addressed to Theseus, the Duke of Athens.
Explanation:
William Shakespeare's "Midsummer Night's Dream" is a comedy that portrays the events surrounding the marriage of Theseus, the Duke of Athens and Hyppolita.
Hermia and Lysander were in love, much to the dismay of her father Egeus. Demetrius had been previously in love with Helena, Hermia's best friend. But now he's trying to marry Hermia, with the full support of Egeus. In Act IV, scene 1, the four characters Lysander, Hermia, Demetrius and Helena were all found in deep sleep. Hermia and Lysander had planned to elope and run away but was caught up by Helena who, through the magic potion, had fallen in love with Lysander. On the other hand, Demetrius had, by the same magic potion put on him by Queen Hyppolita, had fallen in love with Helena. When Egeus and Theseus arrived, they woke them up. It was then that they started explaining their situation to the Duke and Egeus.
Demetrius spoke the lines "My love to Hermia,
Melted as the snow, seems to me now
As the remembrance of an idle gaud"
to Duke Thesues describing his love for Hermia.