The outermost shell of each carbon atom has four electrons. In diamond, these electrons are shared with four other carbon atoms to form very strong chemical bonds resulting in an extremely rigid tetrahedral crystal. It is this simple, tightly-bonded arrangement that makes diamond one of the hardest substances on Earth.
Answer: Diamond is hard due to its giant covalent lattice and it has many strong covalent bonds.
Explanation:
A chemical formula is shown below. How many total atoms are in 2 molecules of the chemical formula shown?
C6H12N2O
Answer: 42
Explanation: I took a quiz and had the same question.
In a science demonstration, a teacher mixed zinc (Zn) with hydrogen chloride (HCl) in a flask and quickly attached a balloon over the mouth of the flask. Bubbles formed in the solution and the balloon inflated.
What most likely occurred during this demonstration?
The Zn and HCl both retained their identity.
Either Zn or HCl, but not both, retained its identity.
Evaporation of one of the substances occurred.
One or more new substances formed.
One or more new substances formed.
Answer:
d
Explanation:
100 quiz
PLEASE ANSWER
A train travels at an average speed of 25 miles per hour. How long does it take the train to travel 2000 miles
Answer:
80 hours. 2,000 ÷ 25 = 80
What volume of O2 would be required to react with 4.6 grams of Na
Volume of O₂ = 1.12 L
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products
Reaction
4Na+O₂ ⇒ 2Na₂O
Ar Na = 23 g/mol
mol Na :[tex]\tt mol=\dfrac{4.6}{23}=0.2[/tex]
mol O₂ :[tex]\tt \dfrac{1}{4}\times 0.2=0.05[/tex]
Assume at STP (0 C, 1 atm), 22.4 L for 1 mol , then volume of O₂ :
[tex]\tt 0.05\times 22.4=1.12~L[/tex]
You crumple a piece of paper in your hands. Not all of the kinetic energy from your hands is used to crumple the paper. Where does the rest of the energy go?
A. It is transformed into sound energy.
B. It is transformed into light energy.
C. It is transformed into electrical energy. D. It is transformed into magnetic energy.
Answer:
A
Explanation:
When you crumble a piece of paper it make a sound plus i just did on apex
When we crumple a piece of paper in our hands, a part of the energy is transformed into sound energy. Therefore, option (A) is correct.
What is sound energy?Sound transmits through the medium such as liquids, gases, and plasma in the form of longitudinal waves or compression waves. It requires a medium to propagate as it can travel through solids as both longitudinal and transverse waves.
Transverse sound waves exhibit waves of alternating shear stress perpendicular to the direction of propagation while Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction.
Generally, waves move matter up and down but do not carry along. When we crumple the paper with our hands the kinetic energy of our hands is used to deform the paper but at the same time, we can listen to some sound which indicates that some energy is transformed into sound energy.
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SCIENCE A meteorologist uses a weather map to explain an upcoming change in weather. The map shows a blue line with triangles approaching a red line with semicircles. Based on the map, which weather prediction is most valid? (1 point) A a significant drop in temperature will occur across the area. B There is no chance of precipitation in the forecast. C Warm temperatures will replace cold temperatures. D Humidity levels will rise.
Answer:
The correct option is D) Humidity levels will rise
Explanation:
A rise in humidity means that it is most likely there is going to be a rain.
When blue semi-circle lines with triangles approach red semi-circle lines it is a situation where cold front is approaching a warm front.
The resultant effect is that the warm and cold air both come to a standstill. This will most likely trigger cloud and fog and may even lead to rain.
Cheers
How does a hydra move?....In short form
Answer:
Hydras are generally sessile, but they can detach and move to another location by gliding slowly on their base. Sometimes they somersault, float, or use their tentacles to move along. ... If cut into several sections, a new Hydra will generate from each piece.
Explanation:
Answer:
Hydras are typically sessile, however they are able to detach and flow to every other place via way of means of gliding slowly on their base. Sometimes they somersault, float, or use their tentacles to transport along. ... If reduce into numerous sections, a brand new Hydra will generate from every piece.
what is the estimated digit in the number 0.0643
Answer:
3
Explanation:
Answer:
There are 3 estimated digits.
Explanation:
which of the following affects self esteem? O home, school, community and cultural environments O social interactions with family friends and others O media, tv, social networking sites all the above
Answer:
All the above
Explanation:
Which of the following electromagnetic waves has the most energy on the electromagnetic spectrum?
O A Infrared
O B. X-ray
O C. Gamma
O D. Radio
Answer:
Gamma rays
Explanation:
The waves with higher frequencies will have higher energies and gamma waves have the highest frequencies on electromagnetic scale ,because of this reason gamma waves is the answer.
2. What type of bonding would be expected between the following atoms?
a. Li and F
c. I and Br
b. Cu and S
d. S and O
Considering the definition of covalent and ionic bond, the type of bonding that would be expected between the following atoms is:
Li and F: Ionic Bond I and Br: Covalent Bond Cu and S: Ionic Bond S and O: Covalent BondThe covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas.
An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.
Taking into account the previous definitions, it is first necessary to know if the elements are metallic or non-metallic:
Lithium Li: Metallic atoms Flour F: Non-metallic atoms Iodine I: Non-metallic atomsBromine Br: Non-metallic atomsCopper Cu: Metallic atoms Sulfur S: Non-metallic atoms Oxygen O: Non-metallic atoms
Now you can determine the type of bond of the following pairs of elements:
Li and F: Metallic atoms - Non-metallic atoms: Ionic Bond I and Br: Non-metallic atoms - Non-metallic atoms: Covalent Bond Cu and S: Metallic atoms - Non-metallic atoms: Ionic Bond S and O: Non-metallic atoms - Non-metallic atoms: Covalent BondLearn more:
https://brainly.com/question/7869439?referrer=searchResultshttps://brainly.com/question/14526070?referrer=searchResultshttps://brainly.com/question/2468807?referrer=searchResultshttps://brainly.com/question/2468807?referrer=searchResultsAn object has a mass of 20 g and volume of 10 cm. Enter the numerical value for the density of the object in units of g/cmº
Answer:
density = 2g/cm³
Explanation:
density = mass/volume
mass = 20g
volume = 10cm³
density = 20g/10cm³
density = 2g/cm³
I just need an answer for question 3,4 and 5. thank you so much.
A procedure calls for 0.250 kg of sugar. Your balance is in ounces. What mass in ounces should be weighed out on this balance?
Answer:
8.81849
Explanation:
i believe the whole number would be this but usually i round to the second decimal point, i dont know if you could do that in chemistry tho
Why is it important for you to know the properties and chemical formulas of molecular and ionic compounds? How will this affect your ability to choose one product over another or make decisions about whether to use a certain substance like bleach or drain cleaner? How has learning about atomic structure and compounds changed your understanding of the world around you?
Answer:
See explanation
Explanation:
It is important to know the properties and chemical formulas of ionic and molecular compounds because, knowledge of the properties of a compound aids you in deciding how to use the compound, how to store it and how dangerous it can be. Knowledge of its formula is the first step towards identifying its properties since most chemicals occur in groups having similar chemical/physical properties.
Knowledge of the chemical properties and formula of bleach and drain cleaner will help you to decide which product is a better cleaning agent based on its chemical composition. This will help you as the user to make better decision.
Learning about atomic structure has made me to understand that all matter in the universe are composed of atoms. indeed, certain occurrences in nature can only be explained on the basis of atoms involved.
How was Bohr’s atomic model different from rutherfords atomic model
A. Bohr’s model accounted for electrons that have different charges
B. Bohr’s model could explain the structure of the nucleus
C. Bohr’s model showed that electron orbits had distinct radii
D. Bohr’s model could explain the wave nature of electrons
E. Bohr’s model proved that atoms are unstable in the nature
Answer:
C. Bohr’s model showed that electron orbits had distinct radii
Explanation:
In Rutherford's atomic model, the electrons moved on arbitrary orbits, which was only due to the condition that the Coulomb force acts as a radial force. In Bohr's atomic model, only very specific orbits were allowed, which were determined by Bor's quantum condition.
Answer:
C i agree
Explanation:
helpppppppppp please
what did max planck discovery?
Answer:
Max Planck discovered the quantum of action
Explanation:
Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?
boiling point
shape
hardness
odor
Answer:
D odor
Explanation:
Answer: odor
Explanation:
Plz help!
Covalent bonding is referred to as “sharing” electrons. Is it really sharing? Why or why not?
Answer:
yes
Explanation:
because they will bond in order to gain more stability which is gained by forming a full electron shell
describe what you think will happen to a balloon that has been fully inflated and Port into a hot place explain your prediction
Answer:
Explanation:
A balloon if fully inflated and then placed close to a hot place is likely to blow. This would result from the increased air pressure inside the balloon. Increase in temperature leads to an increase in the energy of the air molecules which move at a higher speed and more collisions.May 11, 2018
Mountain ranges are the result of many different
Answer:
yea that answer he gave is correct
Explanation:
Can someone check if I did this right pls
Answer:
It's right
Explanation:
if 20 ml of carbon dioxide diffuse in 100 second what volume of ozone will diffuse in the same time under similar condition
volume of ozone : 19.15 ml
Further explanationGraham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or
[tex]\tt \dfrac{r_{CO_2}}{r_{O_3}}=\dfrac{\sqrt{M_{O_3}} }{\sqrt{M_{CO_2}}} }[/tex]
rate of CO₂ , M CO₂ = 44,01 g/mol
[tex]\tt r~CO_2=\dfrac{20~ml}{100~s}[/tex]
rate of O₃, M O₃ = 48 g/mol[tex]\tt r~O_3=\dfrac{x}{100~s}[/tex]
volume of ozone
[tex]\tt \dfrac{r~{CO_2}}{r~O_3}=\dfrac{\sqrt{48} }{\sqrt{44.01} }\\\\\dfrac{20}{x}=\dfrac{\sqrt{48} }{\sqrt{44.01} }\\\\x=\dfrac{20.\sqrt{44.01} }{\sqrt{48} }=19.15~ml[/tex]
What are the physical properties of gases, and how do they change under certain conditions?
Answer: Gases expand to fill their containers, have a fluid nature, low density, can be compressed, diffuse and effuse - move in small hole spray perfume .
Explanation:
Gases have such an unpredictable nature like fluid, very low density, can be condensed, disperse and effuse move in tiny hole spray fragrance, and they dominate far more room than the fine solids out of which they establish.
Because gases are harder to identify directly, gases are defined using four physical qualities or observable characteristics such as temperature, density, particles number, and volatility.
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which describes the substances that form covalent bonds
Answer:
both Non metal's G
Explanation:
i did the test
Most metals are NOT ____ ? Liquid at room temperature, ductile, malleable, good conductors of heat and electricity.
Most metals are not liquid at room temperature. Therefore, option A is correct.
Most metals are not liquid at room temperature, except for a few specific exceptions such as mercury (Hg) and gallium (Ga). These metals have relatively low melting points, which allows them to exist in a liquid state at or near room temperature.
The majority of metals, however, exhibit a solid state at room temperature. This solid state is characterized by a regular arrangement of atoms or ions in a crystal lattice structure. The strength of metallic bonds holds the atoms together, giving metals their solid and rigid form.
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Which statement about sound waves is true?
They can be reflected.
Air travels with them
They travel throughoven
They exist only if heard
Answer:
Explanation:
They can be reflex lol
Which periodic gruop has the smallest atomic radiis
Answer:
Helium
Explanation:
5. On a 92 point test, a student scored 87 points. What is their percent error?
Answer:
Explanation:
5.7471264367816%
Why do acids and bases neutralize eachother?
Answer:
Explanation:
When an acid and a base are placed together, they react to neutralize the acid and base properties, producing a salt. The H(+) cation of the acid combines with the OH(-) anion of the base to form water. The compound formed by the cation of the base and the anion of the acid is called a salt.