Explain, in terms of electrons, energy, and energy levels, how the bright-line spectrum of an element is produced
other word for kindly
Answer:
other word for kindly is friendly
Answer: affectionately, thoughtfully, generous
what is The mass of an object if it's density is 12.00 g/mL and it's volume is 3.0 mL
Answer:
36
Explanation:
The formula for density is p=m/v. So we have to rearrange the formula.
It would look like this:
12.00 = m/3.0
From we would just solve by bringing the 3.0 to the other side and multiplying that to 12.00. Which gives us 36
In this reaction, how many moles of ethane (C2H6) would react with 35 moles of 02? 2C2H6 + 702 + 6H20 + 4CO2 O
A. 30 O
B.2 O
c. 10
D. 20
Answer:
C = 10
Explanation:
Given data:
Moles of O₂ = 35 mol
Moles of C₂H₆ react = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 6H₂O + 4CO₂
Now we will compare the moles of O₂ with C₂H₆.
O₂ : C₂H₆
7 : 2
35 : 2/7×35 = 10 mol
Option C is correct.
Answer:
c. 10
Explanation:
a p e x , just took the quiz
What is the formula for beryllium cyanide?
BeCN2
Be(CN)2
BeCN
Be2CN
Answer:
B
Explanation:
I think tha one is more used because it's more reasonable
This toy looks like a dog and can move, but it is a robot. What characteristics are missing to make it alive?
Answer: a beating heart,emotions,pain
Explanation:
If the density of one substance is greater than that of another, the denser substance will _____ when it encounters the less-dense substance. If a substance's density is less than that of another substance, it will _____ on the denser substance.
Answer:
1. Sink
2. Float
Explanation:
Density of a substance refers to its mass per unit volume. Substances are of varying densities. Depending on the density of a substance, it can either sink or float in the presence of another substance with varying density.
If the density of one substance is greater than that of another, the denser substance will SINK when it encounters the less-dense substance. On the other hand, If a substance's density is less than that of another substance, it will FLOAT on the denser substance.
The measurement of an object's mass is a ____.
The lanthanides and Actinides, Which Include All of the F-block Elements, Display Which Properties?
- They are more reactive than the alkali metals
- They can form cations with various charges
- They have low atomic mass
- They only form ions with a +4 charge
- They form covalent bonds with halides
- They are less reactive than the group 1A elements
A hot air balloon traveled 3.5 at 15 m/hr. What is its distance traveled
Answer:
52.2
Explanation:
The formula for distance is speed * time. Just multiply the time and speed together...
3.5 * 15 = 52.2
Therefore, went 52.2. I'm sorry but I don't know what the units will be (probably miles), I hope this helps, and I apologize if it's wrong.
Answer: 52.5
Explanation:
also what is the arrow a pointing to?
A scientist is studying a piece of cloth from an ancient burial site. She determines that 40% of the original carbon-14 atoms remain in the cloth.
Based on the carbon decay graph (Figure 11.27), what is the approximate age of the cloth?
A.5,000 years
B.8,000years
C.10,000 years
Answer:
The answer is B, 8,000 years.
Explanation:
If you look at the graph, match 40 percent to the 8th line and boom 8,000 years.
8,000years is the approximate age of the cloth. Hence, option C is correct.
What are atoms?An atom contains a central nucleus surrounded by one or more electrons.
carbon-14 dating is also known as radiocarbon dating which is a method of age determination that depends upon the decay to nitrogen of radiocarbon (carbon-14).
Hence, 8,000years is the approximate age of the cloth.
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All phase change require energy to be taken away or added.
True
False
Answer:
true
Explanation:
True or false. The human ear drum transfers sound waves into vibrations and into the inner ear.
The human ear drum transfers sound waves into vibrations and into the inner ear. This statement is true.
What is sound wave ?A sound wave is the pattern of disturbance caused by the movement of energy as it propagates away from the source of the sound through a medium. Sound waves are produced by object vibrations and pressure waves, such as a ringing cellphone.
It gathers sound waves and directs them to the ear canal (external auditory meatus), where they are amplified. The sound waves then travel to the eardrum, also known as the tympanic membrane, which is a flexible, oval membrane at the end of the ear canal. The eardrum vibrates as a result of sound waves.
These vibrations are transmitted by the ear drum to the three tiny bones in the middle ear known as the malleus, incus, and stapes. The middle ear bones amplify, or increase, the sound.
Thus,The human ear drum transfers sound waves into vibrations and into the inner ear.
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a wave has a frequency of 50Hz and a speed of 25m/s. What is the wavelength??
Answer:500m/s
Explanation:
What particle is emitted during the following transmutation:
6729Cu→6730Zn+
____?
A.beta particle,
0−1e
B.
positron,
01e
C.alpha particle,
42He
D.gamma particle,
00γ
Answer:
A = ₋₁⁰e
Explanation:
Alpha beta and gamma radiations are the examples of ionizing radiations. When an atom is an excited state and having high energy, the atom is in unstable state. The excess of energy is released by the atom to get the stability. The released energy is in the form of radiations which may include alpha, beta, gamma, X-ray etc.
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
⁶⁷₂₉Cu → ⁶⁷₃₀Zn + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
Answer:
A. beta particle,
0−1e
Explanation:
i just finished mine and it was correct
Areas of Earth that are covered with copious amounts of water are part of
this sphere?
Biosphere
Geosphere
Hydrosphere
Monosphere
Answer:
Hydrosphere
Explanation:
Hydro meaning water
What is the acceleration that this box will move? (Don't forget your units)
Answer:
160 I think or 200
Explanation:
the lines are pulling on the same side so you add those
If I added 10 kJ of heat to a 100 g cube of copper and 10 kJ of heat to a 100 g cube of aluminum, which cube would experience a greater change in temperature. Explain your answer in terms of specific heat.
Answer:
The cube of copper
Explanation:
Cube of copper has a lower specific heat than the cube of aluminum. This pretty much shows that the lower specific heat, the higher change in temp.
(yeah i just found out how to do it like a minute ago cos its on my hw)
A cube of copper would experience a greater change in temperature in comparison with a cube of aluminum.
Given the following data:
Quantity of heat = 10 kJ = 10,000 JoulesMass of copper cube = 100 gMass of aluminum cube = 100 gSpecific heat capacity of aluminum = 0.89 J/g°CSpecific heat capacity of copper = 0.39 J/g°C.To determine which cube would experience a greater change in temperature:
Mathematically, quantity of heat is given by the formula;
[tex]Q = mc\theta[/tex]
Where:
Q represents the quantity of heat.m represents the mass of an object.c represents the specific heat capacity.∅ represents the change in temperature.Making change in temperature (∅) the subject of formula, we have:
[tex]\Theta = \frac{Q}{mc}[/tex]
For copper cube:
[tex]\theta = \frac{10000}{100(0.39)}\\\\\theta = \frac{10000}{39}[/tex]
Change in temperature ([tex]\theta[/tex]) = 256.41°C
For aluminum cube:
[tex]\theta = \frac{10000}{100(0.89)}\\\\\theta = \frac{10000}{89}[/tex]
Change in temperature ([tex]\theta[/tex]) = 112.36°C
Based on the above calculations, we can deduce and conclude that a cube of copper would experience a greater change in temperature in comparison with a cube of aluminum.
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Identify arrows pointing to structures containing pi bonds.
The arrows pointing to the structures containing pi bonds can be seen in the image attached below. From the assumed example Butan-1,3-diene , there are two pi bonds.
A bond is an attractive force designated by a dash (---) that holds atoms or ions mutually in a chemical bonding.
Covalent bonds exist in organic chemistry and they are of two types:
sigma bond σ -bondpi bond π-bondThe sigma bond (σ) exists as a single bond that occurs by the overlapping of an s-s atomic orbital or s-p atomic orbital. They can be seen in unsaturated straight chains such as alkane.
The pi bond (π) exists as a double bond or a triple bond that occurs by the overlapping of two unhybridized p-orbitals.
Since the diagram is not given, we use Butan-1,3-diene as an example of the required structure.
From the structure which is attached in the diagram below, we can see that there are two double bonds indicating the presence of pi-bonds.
Therefore, we can conclude that from the assumed example Butan-1,3-diene, there are two pi bonds.
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Rocks found in streams can have rough edges and sharp grooves. What is the process that roughened the edges and caused the grooves
Answer:
Metamorphism
Explanation:
Rocks found in streams can have rough edges and sharp grooves. Metamorphism roughened the edges and caused the grooves.
What is rock?Rock is a naturally occurring mineral aggregate that is cohesive and composed of one or even more minerals. These aggregates often take the shape of recognisable and mappable volumes and are the fundamental building block of the solid Earth.
Igneous rocks are the ones that develop from magma, a liquid mixture of minerals that form rocks as well as frequently volatile substances like gases and steam. Igneous rocks are created at high temperatures because the minerals that make up its components are crystallized form molten material. Rocks found in streams can have rough edges and sharp grooves. Metamorphism roughened the edges and caused the grooves.
Therefore, metamorphism roughened the edges and caused the grooves.
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how many mg are equal to 450 ug?
Answer:
son 0,45 miligramos
Explanation:
espero que te haya dado una buena respuesta
Marie notices that the current cleaner she is using on her shower is not cutting through the hard water build-up that has accumulated. She decides to purchase 3 other cleaners to see if one of them will do a better job of cutting through the stains. Marie places masking tape in the dry shower to create 5 sections for her experiment. She sprays one cleaner per section and leaves the remaining section untouched to compare her results. After 30 minutes, and without scrubbing any of the cleaner in, she records her observations. In this example, what is the dependent variable?
Answer:
CUT through the hardwater stains
Explanation:
The dependent variable in an experiment is the variable that the experimenter measures. It is the variable that responds to changes made to the independent variable.
In this experiment, Marie conducted an experiment to test which cleaner will do a better job of cutting through the stains (hard water buildup). She measures the cut through the stain, hence, the CUT is the dependent variable, which is dependent on the cleaner used.
How would you finish the last sentence? What would you say to Sherman so he understands that velocity and force are different?
Answer:
Because force is what causes things to move or change while volactiy is when you add more energy and the things volactiy will change.
Explanation:
Q: water is boiled and steam is produced. this is a physical change because the water particles A: a. have turned into something new b. are still water particles c. have reacted with each other d. have been destroyed
Explanation:
The appearance of the water has changed because it has gone from a liquid state to a gas state. This is a physical change because the water particles are still water particles and have not changed their identity.
Which biome would be nearest to the equator
The diagram shows JJ Thomson’s experiment with a cathode ray tube.
positively charged metal plate. negatively charge metal plate
Which of the following conclusions about the particles in the cathode ray is most consistent with JJ Thomson’s experiment and observations?
The particles are positively charged.
No assumptions can be made from the experiment.
The particles are negatively charged.
The particles are neutral.
Answer:
The particles are negatively charged.
Explanation:
Electron was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
helppp ASAP....The overall charge of a formula unit for an ionic compound ____.
Group of answer choices
A.is always zero (neutral)
B.it is always positive
C.is always negative
D. it may have any value
Answer:
onic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero
Explanation:
Thats what I found when I looked it up but I didnt know what answer choice to pick out of that so Ill let you do it
Answer:
A. is always zero
Explanation:
In all cases the charge on the sum of the anions is equal to the charge on the sum of the cations, to give a neutral salt
how many total electrons can the D orbitals hold
Answer:
10 electrons
Explanation:
The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max. In the picture below, the orbitals are represented by the boxes. You can put two electrons in each box.
Hope it helps!
Answer:
10
Explanation:
Yes
How do scientists identify the bond type in a compound using the chemical formula
Answer:
How do scientists identify the bond type of a chemical formula? ... By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
Explanation:
Answer:
There is a couple different ways to determine if a bond is ionic or covalent. By definition, an ionic bond is between a metal and a nonmetal, and a covalent bond is between 2 nonmetals. So you usually just look at the periodic table and determine whether your compound is made of a metal/nonmetal or is just 2 nonmetals.
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