Answer: C (1)
Explanation:
H is only the element hydrogen.
3. As a ray of white light passes through a prism, dispersion occurs. Which among the color of
the visible spectrum refracted the MOST?
C. Green
A. Yellow
B. Red
D. Violet
Your answer is option b
i.e. Red
because refractive index of red is more as compared to green, yellow and violet...
What is it called when scientists in the same or similar field of study judge the quality of a fellow scientist’s scientific claim?
HELP ME PLEASE!! If given a graduated cylinder, a beaker with alcohol and a scale, explain the steps to find the mass of 40 mL of alcohol.
In general, some people equate mass and weight.
Mass is one of the principal quantities, which is related to the matter , whereas weight is a force that leads to the center of the earth (Earth's gravitational force)
Steps that can be taken to find the mass :
1. Weigh graduated cylinder (empty) 2. Pour the alcohol in the beaker into the graduated cylinder to the level of 40 ml 3. Weigh again graduated cylinder + poured alcohol 4. mass of alcohol 40 ml = mass in 3rd step - mass in the first stepAt which temperature and pressure would a sample of helium behave most like an ideal gas?
1
75 K and 500 kPa
2
150. Kand 500 kPa
3
300. Kand 50 kPa
4
600. K and 50 kPa
Submit Answer
Answer: 600K and 50kPa
Explanation:
600k as well as 50kPa since the pressure seems to be the lowest as well as the temperature is the greatest throughout this situation.
Under high temperatures and low pressures, actual gases behaved like ideal gases. such as the rule
[tex]PV=nRT[/tex]Even though at high temperatures, the kinetic energy of such gas particles surpasses the intermolecular attractive forces, — in other words this same potential energy of something like the molecules (gaseous).
Thus the above answer i.e., "option 4" is right.
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how many significant figures are in 0.00970 g?
Answer:
3
Explanation:
begining 0's are never significant
all numbers 1-9 are always significant
ending 0's are only significant when there is
a decimal.
A 2.00 L pocket of air at sea level has a pressure of 99.9 atm. What is the
pressure if the pocket of air rises and expands to 8.0 L? *
0.04 atm
O
400 atm
25 atm
52 atm
Answer:
The answer is 25 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{2 \times 99.9}{8} = \frac{199.8}{8} \\ = 24.975[/tex]
We have the final answer as
25 atmHope this helps you
Answer:
25 atm
Explanation:
Hope I helped
Can sedimentation and decantation be used for all types of mixtures? Explain
Is there a relationship between the mass of an object and the rate of settling? Explain.
Explanation:
1. Sedimentation and decantation cannot be used for all types of mixtures.
Decantation is a separation technique in which is used to separate immiscible liquids or mixtures containing liquid and solids within them.
In decantation, gravity is used to bring the denser materials to settle at the bottom.
For homogenous mixtures, it is not possible to use decantation. A solution of sugar and water will not decant.
2. Yes, mass of an object reduces the settling time of such object in a mixture.
The higher the mass, the faster the rate of settling. Also, as we know, mass is directly proportional to density. A body with a high density will settle faster in solution.
Help me please guys :)
Explanation:
1. Methane
2. Diamond
3. not sure : )
:answer question number 2
Explanation:
this question was answered in a couple weeks with the same question I did u do not want me and my dad did it all over and u just said it is not going well and you don't want me and my mom and dad don't mind if I can come up to the mall and pick them out on my own and I can come
Redi placed pieces of meat in several jars. He divided the jars into two groups. He covered the first group of jars with fine cloth. He left the second group of jars uncovered. Redi observed the jars for several days. He saw flies on the cloth of the covered jars, and he saw flies laying eggs on the meat in the uncovered jars. Maggots appeared only on the meat in the group of jars left uncovered.
What is the question in Redi's experiment?
What is the independent (test) variable?
What is the dependent (outcome) variable?
Write a hypothesis for Redi's experiment
Answer:
Experiment Question, Independent & Dependent Variable, Null & Alternate Hypothesis
Explanation:
Experiment Question : Whether fine cloth coverage over chicken jars effect flies & their eggs in ambience ?
Independent Variable : The causal variable, ie cloth cover existence on the chicken jar
Dependent Variable : The resultant variable, ie presence of flies & their eggs near jar, meat
Null Hypothesis [H0] : Cloth cover on chicken jar doesn't effects flies' & eggs' presence around jar, chicken.
Alternate Hypothesis [H1] : Cloth cover on chicken jar effects flies' & eggs' presence around jar, chicken.
The stability and inert nature of noble gases is caused by:
a full d sublevel
a full f sublevel
a full p and a full d sublevel
a full s and a full p sublevel
Answer: a full s and a full p sublevel
Explanation: "noble gases. They are an especially important group of the periodic table because they are almost completely unreactive, due to their completely filled outermost s and p sublevels."
Different elements are most likely to react in similar ways when they
Answer:
Belong to the same group.
Explanation:
Different elements are most likely to react in similar ways when they belong to the same group.
This is because the elements in the same group always have similar number of valence electrons which implies that they all have the same number of electrons in their outermost shell. For example,barium (Ba), beryllium (Be), calcium (Ca), magnesium (Mg), radium (Ra), strontium (Sr) all have 2 electrons in their outermost shell and thus they belong to group 2 of elements which are known as Alkaline earth metals and they all tend to react in the same manner with other substances
The elements that has been belonging to the same group have been able to react in similar ways.
The reactivity of the elements has been based on the presence of the valence electrons. The elements that has been belonging to the same group have consisted of the same number of valence electrons with the increase in the number of shells moving from left to right.
Thus, the elements that have been belonging to the same group have consisted of the same reactive properties.
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What would be a reasonable pH level of the dish soap in your kitchen?
Answer:around 7
If your dish soap is labeled mild, gentle, or great for hands, chances are its pH level is somewhere right around 7. This mildness makes dish soap perfect for day to day cleaning. Most surfaces won't be damaged by dish soap, and there are a lot of places it can be used besides in the kitchen sink
Explanation: I have had this question before
Answer:
7
Explanation:
Considering that you use dish soap on a daily occurence... it is best for it to be versatile. By making it 7... it is very neutral.
This means it's not too acidic for some situations... nor is it too basic in other situations.
which of the following lists show the elements in order, from those having the least protons to those having the most protons in the atoms?
A. K, Mg, N, O
B. C, Al, P, Cl
C. Li, Be, H, He
D. Na, Ne, He, H
The elements that have least protons to those having the most protons in the atoms are:
B. C, Al, P, Cl
Protons in an atom:There is an equal number of protons and electrons in an atom. So when moving across a period in a periodic table the number of electrons increases which also shows the increases in a number of protons. So as the atomic number increases, the number of protons and electrons also increases.
Thus, the order of elements having least to greatest protons are:
C, Al, P, Cl
C has 6 atomic number, Aluminium has 13 atomic number , Phosphorus has 14 atomic number and atomic number of chlorine is 17.
Thus, option B is correct.
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The graph shows a car's velocity over time. Velocity versus Time 60 40 Velocity, in mph forward 30 20 10 4 1 2 3 5 G Time, in seconds (s) What is the car's acceleration from 0 to 1 second? A. 8 mph/s B. 60 mph/s C. 10 mph/s D. 20 mph/s
The car acceleration form 0 to 1 will be 20 mph/s.
What is acceleration?The rate at which an object's velocity changes with respect to time is called acceleration. Accelerations are measured in terms of vectors. The orientation of the force is acting on an item determines the orientation of its acceleration. Acceleration can be calculated by using this formula:
a = v-u/ΔT.
where, a = acceleration, v = final velocity, u = initial velocity and T is temperature.
Calculation of acceleration.
It is given that v = 20 , u = 0,
ΔT can be calculated as,
[tex]=T_{2} - T_{1} \\= 2-1\\ = 1[/tex]
Now , put the values given data in acceleration formula
a = 20-0/ 1
= 20 mph/ s.
Therefore, acceleration of car will be 20 mph/s.
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Read this excerpt from Eleanor Roosevelt’s "What I Hope to Leave Behind."
As I see it we can have no new deal until great groups of people, particularly the women, are willing to have a revolution in thought; are willing to look ahead . . . are willing to give up constant competition.
By repeating the phrase “are willing” three times, Roosevelt creates a tone of
politeness.
firmness.
triumph.
cooperation.
Answer:
triumph
Explanation:
Because women had been fighting so much that she feels triumphant that they will succeed and they are willing to continue until they reach success
Answer:
triumph
Explanation:
i got it right
PLS PLS HELP
this is science
Answer:
its minerals :)
Explanation:
i hope its right
alsooo heyyyy
Answer:
minerals!!!!! i think anyway
Explanation:
Predict: Note the type of reaction you expect for
the sole reactant Na2CO3.
a. single replacement
b. double replacement
c. combustion (and synthesis)
d. synthesis
e. decomposition
Answer:
double replacement
Explanation:
Answer:
It is indeed double replacement
Explanation:
Which property do metalloids share with nonmetals?
Answer:
Both can react to form acidic compunds. Both are brittle.
Explanation:
ClO3− Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all nonhydrogen atoms, or use square brackets to denote the overall charge. View Available Hint(s)
Answer:
See explanation
Explanation:
The overall charge on ClO3− is shown on the image attached to this answer. If we calculate the formal charges on each atom in the structure, we will notice that one oxygen atom has a formal charge of -1 while all other atoms have a formal charge of zero.
This gives the compound an overall charge of -1 as shown in the image attached to this answer. This is the correct Lewis structure for the compound ClO3− .
The molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.
When all the electrons of an atom are shared equally, the charge attained by the atom is known as a formal charge.
The formal charge can be calculated as:
Formal charge = valence electron - non-bonding electron - [tex]\rm \dfrac{bonding\;electron}{2}[/tex]
In the molecule, the formal charge of Oxygen = -1.
In the molecule, the formal charge of Chlorine = +2
The oxygen atom has 8 electrons, in which 2 are shared in the bond formation, and 6 electrons are valence electrons.
The chlorine atom has 7 valence electrons in which 6 electron pairs are shared with the oxygen atom, and 1 lone pair has been available with Cl.
The structure of [tex]\rm ClO_3^-[/tex] molecule has been given in the image attached. The image shows the available lone pairs and the bonding in the structure.
Thus, the molecule has a formal charge of -1 on all oxygen atoms, and +2 on the Cl atom.
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1. Which of the following is not a major classification for elements in the periodic table?
O a. metals
O b. metalloids
O c. nonmetals
O d. noble gases
Answer:
Noble gases
Explanation:
Continental waters are classified into two categories Lentic and Lotic. Ecosystem has flowing waters; such as creeks, streams, rivers, springs, brooks and channels. A lentic Ecosystem has still waters such as ponds, marshes,ditches, reservoirs, and lakes. The ecosystem of Lentic and Lotic waters includes biotic (Living) interactions between plants, animals and micro- organisms, and abiotic (non living) physical and chemical interactions.
A) Fish
B) algae
C) Bacteria
D) water flow
Answer:
it is D
Explanation:
If a radiation source has a wavelength of 4.76 x 10-6 m, then what is its frequency?
Answer: 6.3 * 10^15
Explanation:
wavelength = speed of light / frequency
so rewriting the equation gives frequency = speed of light / wavelength
so 3.0 *10^10 / 4.76 * 10^-6 = 6.3 * 10^15
Please help me and I’ll give you brainiest!!!!!!!!!
Have a wonderful day!!:)))
Answer:
Explanation:
C
3. What crime had James Kater been convicted of in 1969?
A. Sexual assault of a 15-year-old girl.
B. Theft of a 1976 Opel model green car.
C. Abduction and assault of a 13-year-old girl,
D. Second degree murder of a 18 year-old female.
You observe 2 waves named alpha and beta. The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz. Based on these observations which wave has a shorter wavelength? Group of answer choices
Answer:
shorter wavelength = alpha wave
Explanation:
Given that,
The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz.
We need to compare the wavelengths of these two waves.
For alpha wave,
[tex]\lambda_1=\dfrac{c}{f_1}\\\\\lambda_1=\dfrac{3\times 10^8}{5}\\\\=6\times 10^7\ m[/tex]
For beta wave,
[tex]\lambda_2=\dfrac{c}{f_2}\\\\\lambda_2=\dfrac{3\times 10^8}{2}\\\\=15\times 10^7\ m[/tex]
From the above calculations, we find that the wavelength of the alpha wave is shorter than the wavelength of the beta wave.
what is the ionic compound formula sodium nitride?
Answer:
In ionic compounds, the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N
Explanation:
Answer:
the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N
Explanation:
Two sphericle objects have masses of 8000 KG and 1500 KG their centers are separated by a distance of 1.5 M find the gravitational attraction between them
if I am correct I think its I'm am not 100 percent sure but I think this should be the answer
The gravitational force of attraction between them is 3.56 * 10⁻⁴ N
Using the formula of gravitational attraction
F = G*M1M2/d²
where G = 6.67 * 10⁻¹¹ Nm²Kg⁻²
M1 = 8000Kg
M2 = 1500 Kg
F = 6.67 * 10⁻¹¹ * 8000 * 1500 / (1.5)²
F = 3.56 * 10⁻⁴ N
The gravitational force of attraction between them is 3.56 * 10⁻⁴ N
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How many hydrogen atoms are there in the molecule H2SO?
A. 1
B. 3
C. 4
D.2
please help, brainliest to the first person who is correct , i’ll give another 25 points if this is right
Answer:
D:2
Explanation:
H is hydrogen, and the subscript represents the amount of atoms it has so H2SO is two hydrogens
Answer:
D. 2 I think, not 100% sure.
Non examples of chemical change
List some please
Answer:
Crushing a can.
Melting an ice cube.
Boiling water.
Mixing sand and water.
Breaking a glass.
Dissolving sugar and water.
Shredding paper.
Chopping wood.
Some non-examples of the chemical reaction should be boiling water, glass breaking out, etc.
Chemical reaction
It is a process where one or more substances that we know as reactants should be transformed into one or more distinct substances that we know as products. Here the substances should be treated as the elements of chemicals or the compounds.Chemical reactions are an integral part of technology, culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.Therefore, Some non-examples of the chemical reaction should be boiling water, glass breaking out, etc.
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