LusterMalleable
Ductile
Conductor
Solid at room temperature
Which element could be described by the list of properties above?
A) magnesium
B) mercury
C) neon
D) phosphorus
Answers
Hope this helps and let me know if you need more help!
The correct answer is (A)
= magnesium
Related Questions
A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, what is the new volume of the balloon in the hot room?
A catalyst is added to a system at equilibrium. If the temperature remains constant, the activation energy of the forward reaction(1) decreases(2) increases(3) remains the same
What do hydrogen ions and hydroxide ions come together to form?a. a base b. water c.a tritant d. an acid
As a chemical reaction occurs, the thermometer in the container records an increase in temperature. What is true of the reaction? The reaction is endothermic because heat was taken in by the reaction. The reaction is exothermic because heat was released by the reaction. The reaction is endothermic because heat was released by the reaction. The reaction is exothermic because heat was taken in by the reaction.
pOH =
pH =
[H+] =
Answers
Answer: pOH= 4.06
pH= 9.94
Explanation: pOH is the negative logarithm of concentration.
pH is the negative logarithm of concentration.
2)
3)
pH = 10
[H+] = 1 X 10^-10
Answers
Answers
The atoms that would sterically interact with methyl group located axially are highlighted in pink color in the attached image.
Further Explanation:
The stereoisomer of a molecule that has same chemical formula and connectivity of bond but differs in the arrangement of the atoms in space is known as conformer. The rotation about the carbon-carbon single bond can lead to the formation of conformer of a molecule.
There are four conformers of cyclohexane molecule as follows:
- Chair conformation
- Boat conformation
- Twist boat conformation
- Half chair conformation
Chair conformation is considered as the best conformation of cyclohexane. The hydrogen in blue denote the axial positions and the hydrogen in pink denote equatorial positions. (Refer to the attached image)
The stable conformation is that in which the bulky groups such as hydroxyl, methyl, and nitro group occupy the equatorial positions while the relatively small groups such as hydrogen atoms occupy axial positions. The reason is that the axially placed substituents suffer more steric repulsion and that generates strain in the molecule. The strain leads to high energy and thus less stability.
While writing the chair conformation the bulkier groups are preferentially placed at equatorial positions. The conformation that has bulky group at equatorial position is more favorable than the conformation that has bulky group at axial position. The reason for the stability of the conformation is diaxial interactions.
1,3-diaxial interaction: The 1,3-diaxial interactions occur among the axial substituent present at 1 and 3 positions.
The conformation in the problem has axial substituent hydrogen and bromine at the two positions 3 and 3’ which lead to 1,3-diaxial strain in the molecule and makes it unstable. (Refer to the attached image)
Learn more:
1. Balanced chemical equation brainly.com/question/1405182
2. Oxidation and reduction reaction: brainly.com/question/2973661
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Conformation of cyclohexane
Keywords: Cyclohexane, planar, chair conformation, axial positions, equatorial positions, steric repulsion, high energy, 1, 3-diaxial interaction, 1, 3-diaxial strain.
Final answer:
In a substituted cyclohexane, 1,3-diaxial interactions happen between groups on the same side of the ring but are two carbons apart. In this scenario, the hydrogen atoms on carbons 3 and 5 would interact with the methyl group, causing steric strain.
Explanation:
In a substituted cyclohexane compound, 1,3-diaxial interactions occur between groups that are on the same side of the ring but are two carbons apart. In this case, the question focuses on the steric interactions with the methyl group. Assuming that the methyl group is on carbon-1 of the ring, the hydrogen atoms on carbons 3 and 5 (both axial positions) on the same face of the ring would sterically interact with the methyl group in a 1,3-diaxial fashion. This steric interaction leads to steric strain, which destabilizes the compound and promotes a conformational flip to relieve this strain.
Learn more about Steric Interactions here:
#SPJ6
(2) 2.0 L of Kr (4) 1.5 L of Ar
Answers
Answer: (1) 1.0 L of Ne
Explanation: According to Avogadro's law, 1 mole of every gas occupy 22.4 Liters at STP and contains avogadro's number of particles.
Avogadro's Law: This law states that volume is directly proportional to the number of moles of the gas at constant pressure and temperature.
(At constant temperature and pressure)
Thus equal volumes contain equal number of atoms.
Hence, 1.0 liter of helium contains the same total number of atoms as
1.0 L of Ne at STP.
Answers
5.0 mL ------------- 100 mL ( solution )
40 mL --------------- ? ( solution )
V = 40 . 100 / 5.0
V = 4000 / 5.0
V = 800 mL
hope this helps!
G The electrons are outside the nucleus and have no charge.
H The electrons are inside the nucleus and have a negative charge.
The electrons are outside the nucleus and have a negative charge.
which is correct
Answers
Answer:
D. The electrons are outside the nucleus and have a negative charge.
Explanation:
Electrons are located outside the nucleus while protons and neutrons are located inside the nucleus.
Electrons are negatively charged and attracted to nucleus as the nucleus carry protons that are positively charged and neutrons have no charge.
Electrons are arranged in different energy levels based on the attraction between the positively charged nucleus and negatively charged electron.
Hence, the correct answer is "D. The electrons are outside the nucleus and have a negative charge."