Answers
- an ionic bond is an attraction between oppositely charged ions. a covalent bond is a sharing of electrons between atoms.
- a bond between two atoms
- the atoms are arranged differently in each molecule
Related Questions
Which of the following isotopes are NMR inactive?
a. 1H
b. 12C
c. 15N
d. 16o
e. 19F
f. 31P
Answers
Answer:
12C and 16O
Explanation:
Here, we want to select which of the options are NMR inactive. For an isotope to be NMR inactive, then the net nuclear spin is zero.
What this means is that the number of proton present coupled with the number of neutrons are an even number pair.
What we are saying here is that the number of protons is an even number while the number of neutrons too is an even number. So the net nuclear spin in this case is zero.
in the case of oxygen, we have 8 protons and 8 neutrons. This makes the nuclear spin zero and consequently makes the isotope NMR inactive.
Same is in the case of carbon. There are 6 protons and 6 neutrons and this also makes nuclear spin zero .
In all the other isotopes in the question, we have odd number even number or even number odd number pairs of protons and neutrons.
Why do fireworks produce different colors
Answers
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Energy is the only factor that determines the color of light of fireworks.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Fireworks has many different types of element. When any element is given an energy. Then the process of excitation of electrons takes place from its outermost shells. Every element absorb characteristic wavelength of energy and releases light to the corresponding wavelength.
Therefore, energy is the only factor that determines the color of light of fireworks.
To know more about element, here:
https://brainly.com/question/8460633
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Making a Lis changing something to improve your work. A) scenario
B) revision
C) entry event
D) wish list
Answers
Which of these statements is supported by the results of Thomson’s experiment? Check all of the boxes that apply.
Atoms are indivisible.
Cathode rays are made up of negatively charged particles.
Atoms contain negatively charged particles.
Answers
Answer: Cathode rays are made up of negatively charged particles.
Atoms contain negatively charged particles.
which of the following is not true about water ? *
Water has a freezing point of 0℃
Water is chemically stable and makes a good energy source
Water has a density of 1 g/mL
water is polar
water has a boiling point of 100℃
Water is less dense as a solid
Answers
The density of water at 40°C is 0.992 g/mL. What is the volume of 2.69 g of water at this temperature? V= mL
Answers
Answer:
[tex]\boxed {\tt 2.71169355 \ mL}[/tex]
Explanation:
Density can be found using the following formula:
[tex]d=\frac {m}{v}[/tex]
Rearrange the formula for v. Multiply both sides by v, then divide both sides by d.
[tex]d*v =\frac {m}{v}*v[/tex]
[tex]d*v=m[/tex]
[tex]\frac{d*v}{d}=\frac{m}{d}[/tex]
[tex]v=\frac{m}{d}[/tex]
The volume can be found by dividing the mass by the density. The mass is 2.69 grams and the density is 0.992 grams per milliliter.
[tex]m= 2.69 \ g\\d= 0.992 \ g/mL[/tex]
Substitute the values into the formula.
[tex]v=\frac{2.69 \ g}{0.992 \ g/mL}[/tex]
Divide. Note that the grams, or g, will cancel each other out.
[tex]v=\frac{2.69}{0.992 \ mL}[/tex]
[tex]v= 2.71169355 \ mL[/tex]
The volume of the water is 2.71169355 milliliters.
Which of the following is equal to an impulse of 18 units?
O A. Force = 10, time = 2
B. Force = 0.1, time = 18
O C. Force = 6, time = 3
OD. Force = 7, time = 3
Answers
Answer:
the answer is C. this is because 6 times 3 is 18
What is the answer? Please
Answers
Answer:
To instill a high degree of personal honor, self-reliance, and confidence in each cadet by presenting a military environment in which cadets will be forced to rely upon themselves and their shipmates to study, work, and learn.
A peregrine falcon dives 176 meters through the air in 8 seconds. Its
average speed during the dive is 22 m/s. *
Answers
Answer:
This question is asking to find the average speed during the dive. The answer is 22m/s.
Explanation:
Average speed of a substance can be calculated knowing it's distance over a particular amount of time.
The formula for average speed is:
Average speed (s) = Distance (d) / time (t)
In the case of this question where A peregrine falcon dives 176 meters through the air in 8 seconds, the distance of the falcon is 176m, while the time is 8s. Hence;
Average speed = 176/8
Average speed = 22
Therefore, the average speed of the falcon diver is 22m/s.
Select the answer from the drop-down, ranging from true or false.
Mixtures have components that are always in fixed ratios.
[ true or false ]
Compounds can only be separated physically.
[ true or false ]
The components of a mixture keep their unique properties.
[ true or false ]
Mixtures can be physically separated
[ true or false ]
Mixtures are pure substances
[ true or false ]
Compounds are pure substances
[ true or false ]
Answers
Answer:
False, False, True, True, False, True
Explanation:
Mixtures have components that are always in fixed ratios. FALSE. The ratio of components in a mixture is variableCompounds can only be separated physically. FALSE. Compounds can only be separated chemically.The components of a mixture keep their unique properties. TRUE. Mixtures can be physically separated. TRUE. Mixtures are pure substances. FALSE. Mixtures are formed by a mixture of 2 or more pure substances, not bonded chemically.Compounds are pure substances. TRUE.true? no false. ... no its true uhhhhh no gotta be false true. false. true. fase. gotta be tru false or maybe its true? nah its false
pls brainliest?
How many Calories are there in 4600 Joules?
Answers
Answer:
1099.426
Explanation:
Which of the reactions are spontaneous (favorable)?
A. 2Mg(s) + O2(g) rightarrow 2MgO (s) delta G = - 1137 kJ / mol
B. NH3(g) + HCl(g ) rightarrow NH4Cl(s) delta G = - 91.1 kJ / mol
C. AgCl(s) rightarrow Ag+ (aq) + Cl-[aq) delta G = 55.6 kJ / mol
D. 2H2(g) + O2(g) rightarrow 2H2O(g) delta G= 456 kJ / mol
E. C(s) + H2O(t) rightarrow CO(g) + H2(g) delta G = 90.8 kJ / mol
F. CH4(g) + 2O2(g) rightarrow CO2(g) + 2H2O(t) delta G = -820 kJ / mol
A. Reaction A.
B. Reaction B.
C. Reaction C.
D. Reaction D.
E. Reaction E.
F. Reaction F.
Answers
Answer: Reactions: A, B and F
Explanation: Gibbs Free Energy, symbol G, combines Enthalpy (sum of internal energy) and Entropy (measure of how much the energy of atoms and molecules become spread out in a process).
The change in free energy (ΔG) is the sum of enthalpy and the product of temperature and entropy of the system.
With free energy, it is possible to determine if a reaction is spontaneous, i.e., happens wthout external energy, or non-spontaneous.
If ΔG is negative, reaction is spontaneous. If ΔG is positive, reaction is non-spontaneous.
Analysing each ΔG of the reactions above, reactions A, B and F's Gibbs Free energy are negative, so these 3 are spontaneous.
Convert a speed of 933 cm/s to units of inches per minute
Answers
Answer:
220000 in/min
Explanation:
Step 1: Write out conversions
1 in ≈ 2.54 cm
60 sec = 1 min
Step 2: Set up dimensional analysis
[tex]\frac{933cm}{s} (\frac{60s}{1min} )(\frac{1in}{2.54cm} )[/tex]
Step 3: Evaluate
220039.4 in/min
Step 4: Sig figs
There are 3 sig figs
220039.4 in/min ≈ 220000 in/min
Identify the reagents
Answers
Hope this helped
Use the drop-down menus to identify the career that matches each description Helos employees and management negotiate: Oversees payment of employees Maintains employee records, such as contact information: Oversees the Human Resources department of a company.
Answers
Answer:
✔ Labor Relations Specialist
✔ Compensation and Benefits Manager
✔ Human Resources Assistant
✔ Human Resources Manager
B
D
A
C
Answer:
Helps employees and management negotiate:
✔ Labor Relations Specialist or B.)
Oversees payment of employees:
✔ Compensation and Benefits Manager or D.)
Maintains employee records, such as contact information:
✔ Human Resources Assistant or A.)
Oversees the Human Resources department of a company:
✔ Human Resources Manager or C.)
substance A is a nonpolar liquid and has only dispersion forces among its constituent particles. Substance B is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles as substance A. When substance A and substance B are combined, they spontaneously mix. Why
Answers
Explanation:
The substance A and B will mix into one solution as it is a solvent interactions which is greater than or equal to the solute- solute and the solvent-solvent interactions. Thus when such interactions occurs, it is greater or equal to the some of the other two possible interactions. And here both have the same kind of interaction, and same magnitude, so they will makes to form a solution and mixes properly and spontaneously.
HELP 100 POINTS WILL MARK BRAINLIEST In ancient times, early astronomers watched stars travel across the sky in one direction for several months, then over the course of a few weeks the stars would reverse course and move in the opposite direction. After these few weeks, the stars would reverse direction again and resume their original course. The ancient astronomers called these “wanderer stars”. After more research was done, it was found that these “wanderer stars” were actually other planets. As more data was collected, it was shown that all planets move at different speeds as they travel in their orbits around the Sun. As the Earth moves in its orbit, it moves faster than some planets and slower than others. This causes the Earth to “pass” some planets as it travels, which results in the appearance that the other planets move backwards. Is this a description of a scientific law or scientific theory? 100 points PLEASE HELP
Answers
because Astronomers call this the “retrograde motion”. It’s just our viewpoint from earth. The plants aren’t actually changing directions. For example, Mars has the largest retrograde motion. Since Mars is further from the Sun than our planet, it orbits the Sun slower, meaning Earth on the inside track can catch it up and then overtake it.
Give the name of HI as an acid and as a binary compound
Answers
Answer:
HI is a diatomic molecular compound known as hydrogen iodide or hydroiodic acid. It is a strong acid.
2. The four parts, or blocks, on the
periodic table are _d, and f.
s, P
a, b
Answers
Answer:
s, p
Explanation:
The four parts, or orbitals, on the periodic table are s, p, d, and f.
How do the key results indicate
Answers
Suppose you are given samples of pentane, 2,2-dimethylpropane, 2-methylbutane and hexane. how you would go about determining which substance had the highest boiling point.
Answers
Answer:
Addiction
Explanation:
Solve: (6.825 x 10-3) (1.2 x 10-8)
Choose the answer with the correct number of significant figures.
a 8.2 x 10-11
b 0.081 x 10-8
C 8.01 x 1011
d None of the above
Answers
Answer: a.) 8.2 x 10^-11
Explanation:
14. Which of the following will result in a chemical change?
A. Melting ice to obtain water
B. Evaporating alcohol into vapor
C. Burning coal in a furnace
D. Drying wood in a shed
Help ASAP
Answers
Answer:
C
Explanation:
a chemical change is when a substance changes into another.
wood burning turns into heat which would be considered a chemical change
How many sig figs are there
5.00000008
Answers
Answer:
2 sig figs.
Explanation:
Sig Fig Rules:
Any non-zero digit is a significant figure.
Any zeros between 2 non-zero digits are significant figures.
Trailing zeros after the decimal are significant figures.
Which common item is made from copper?
soap
coins
baby powder
colored pencils
Answers
Answer:
coins
Explanation:
HELPPP ANSWERS ????
A: 3
B: 2
C: 1
D: 4
Answers
Answer:
B. 2
Explanation:
We see from the reaction side of the equation that we have 2 Li. That means we need the same number of Li on the products side. Therefore, our only option is 2.
Answer:
b
Explanation:
why is a lot of energy needed to break covalent bonds
Answers
Answer:
The strength of a bond between two atoms increases as the number of electron pairs in the bond increases.
Explanation:
What is the purpose of keeping a running list of new vocabulary words?
A. To make it easier to decode the word when you see it again
B. To provide an easy-to-remember picture associated with the word
C. To make it easier to remember and use new words
D. To allow you to critically evaluate every new word you come
across
Shjajfbcjahaixhfjwnzhsbsjxjdbxbsjzjfbwnznsnwnnsndndnwnbwjshsbdbdndnndndndbxbxnsnsn
Answers
Answer:
C
Explanation:
As C would be the wisest choice as being able to remember and use more words than the average human not only opens up your vocabulary but also your chances of writing a better essay using said words.
Answer:
C
Explanation:
Makes it easier to remember and use new words
Complete hydrolysis of a hexapeptide gives 2 Gly, Leu, Phe, Pro, and Tyr. Reaction of the peptide with phenylisothiocyanate gave the phenylthiohydantoin of Pro. Partial hydrolysis of the peptide gave the following fragments: Phe-Gly-Tyr, Gly-Phe-Gly, Pro-Leu-Gly, Leu-Gly-Phe. What is the structure of the peptide
Answers
Answer:
The complete sequence : Pro-Leu-Gly-Phe-Gly-Tyr
Explanation:
For the formation of phenylisothiocyanate, the four peptide sequences overlap common residue to get the the complete sequence of the hexapeptide as shown in the diagram attached below
Attached below is the structure of the peptide
Convert 542 nanograms to grams.
g.
Answers
Answer:
542 nanograms to grams = 5.42E-7g
Explanation: