Answers
Answer:
c) family has atoms with equal number of filled energy levels
Related Questions
What is the mass of 6.02 x 1023 atoms of carbon-12?
A)
me
6 grams
B)
6.02 grams
6.02 x 1023
grams
D)
12 grams
Answers
Answer: its D 12 grams
Explanation: you just have to find the molar mass of carbon in the periodic table
if two magnets are placed on a table, which statement describes a situation with the most attraction between the two magnets
Answers
The north pole of one magnet is near the South pole of the other magnet.
The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other.
A ___________________________ is a mixture in which the properties of thesubstances are spread evenly.
Answers
Answer:
homogenous mixture
Explanation:
What two air masses form a STATIONARY front?
Captionless Image
maritime polar
continental polar
maritime tropical
continental tropical
Answers
A stationary front is a boundary between two different air masses that aren't moving relative to each other, but instead are stationary.An air mass is a massive body of air with uniform temperature and moisture characteristics. An air mass takes on the qualities of the area where it forms. As an air mass moves from one place to another, it carries its temperature and moisture content with it.
It can change temperature and humidity, but not as quickly as it can change location.Types of air massesThe air masses are categorized based on two criteria. The first is the place of formation, while the second is the kind of surface over which they move. There are four types of air masses based on the place of formation, and two types based on the surface over which they move, for a total of six different types. Maritime tropical (mT): Warm and moist air masses that originate over water.Maritime polar (mP): Cold and moist air masses that originate over water.Continental tropical (cT): Dry and hot air masses that form over land. Continental polar (cP): Dry and cold air masses that form over land.A stationary front can be created when a mass of air with a uniform temperature and moisture characteristic meets an opposing air mass with similar characteristics but moving in a different direction. When a cold front and warm front meet and neither front is powerful enough to move the other, a stationary front occurs. The result is a stationary front that separates the two opposing air masses, like continental polar and continental tropical.For such more question on temperature
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The ________ and ________ are the main systems that move fluid throughout the body.
Answers
find the mass of 250.0 mL of benzene
Answers
Answer:
Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g. d = 1.84 g/mL
Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL. g = (0.8765 g/mL) (250.0 mL) = 219.1 g
Explanation:
Brainliest please?
Draw the structures of methyl oleate and propylene glycol. Which one is more polar, and how can you tell
Answers
1234567891011121314151617181920
Complete the balanced neutralization equation for the reaction below:
HBr(aq) + LiOH(aq)
Answers
Answer:
HBr+LiOH->H2O+LiBr
Explanation:
Hydrogen and Lithium ions have a charge of +1, Bromine and Hydroxide ions have a charge of -1. Therefore, the result.
I need help with this
Answers
my brain is lack of blood HAHAHAHAH sorry but i don't know how to answer that
When Sam plays online video games with other people he makes sure to avoid offensive language play by the rules his gaming group established and help other players have a good time. Sam is being a good digital citizen by following a code of
Answers
"Sam is being a good digital citizen by following a code of conduct.
A code of conduct is a set of rules that govern how people should behave online. It is important to follow a code of conduct because it helps to create a safe and respectful environment for everyone.
Here, Sam is following the code of conduct for his gaming group. This code of conduct may include rules about using offensive language, cheating, and griefing. By following these rules, Sam is helping to create a positive experience for everyone in his gaming group.
Therefore, Sam is following the code of conduct.
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Will mark BRAINLIEST!!
PLEASE ANSWER I HAVE 5 MINS
Answers
Answer:
Explanation:
7A 0.2
7B cork
7C Yes because the lighter it is the more likely it will float
7D Density is one of the fundamental scientific principles of life. It can describe any everyday object. Despite its significance, students often struggle to understand what it really is. Density is a measurement of how much space or volume is packed in an object or substance.
8 property means a characteristic or trait that you can use to describe matter by observation, measurement, or combination.
The pH of acid solution are given below Choose the weakly and solution a. 12.b 6 c
9
Answers
Answer:
Explanation:
If you are looking for a weak acid then answer should be b. 6
pH scale goes from 0-14. 0-6 being acid, 7 being neutral, 8-14 being base.
Strong acids are typically low pH like 0-1, since 6 is not in that range it is weak acid.
Option A and C describe base since they are above 7.
Write the net ionic equation, including phases, that corresponds to the reaction
Cu(ClO4)2(aq)+Na2CO3(aq)⟶CuCO3(s)+2NaClO4(aq)
Cu
(
ClO
4
)
2
(
aq
)
+
Na
2
CO
3
(
aq
)
⟶
CuCO
3
(
s
)
+
2
NaClO
4
(
aq
)
Answers
Answer:
Cu^2+(aq) + CO3^2-(aq) ⟶ CuCO3(s)
Explanation:
The balanced chemical equation for the given reaction is:
Cu(ClO4)2(aq) + Na2CO3(aq) ⟶ CuCO3(s) + 2NaClO4(aq)
We first need to identify the spectator ions to write the net ionic equation. These are ions that appear on both sides of the equation and do not participate in the reaction. In this case, the spectator ions are Cu^2+ and ClO4^-, as they appear unchanged on both sides.
The net ionic equation is obtained by removing the spectator ions from the balanced equation. Therefore, the net ionic equation for this reaction is:
Cu^2+(aq) + CO3^2-(aq) ⟶ CuCO3(s)
Note that Na+ and ClO4^- are not included in the net ionic equation because they do not participate in the formation of the solid product (CuCO3).
It is possible to convert moles to particles by doing what
Answers
5. An example of a muscle that is voluntarily controlled is a muscle that
A. Makes the leg move.
B. Makes the heart pump.
C. Squeezes blood through vessels.
D. Squeezes food in the stomach.
Answers
Answer:
A, Makes the leg move
Explanation:
The Law of Conservation of Matter states that in a chemical reaction matter cannot be ___ or ____
Answers
Answer:
The law of conservation of matter states that in a chemical reaction matter cannot be created or destroyed
Explanation:
Type your answer here:
Table 1. Measurements Taken from a Simulation of a [insert mass value] kg Ball Released from Various Heights on a Ramp
Mass of ball (kg) Drop height on-ramp (m) Potential energy (J) Time to travel 1.0 m (s) Speed (m/s) Kinetic energy (J)
0.5
1.0
1.5
2.0
2.5
3.0
Conclusions
1. What conclusions can you draw about how the amount of potential energy stored in a system changes as a ball is placed at varying heights on a ramp? Write an evidence-based claim.
Type your answer here:
2. What conclusions can you draw about how the final kinetic energy of a ball in a system changes as a ball is placed at varying heights on a ramp? Write an evidence-based claim.
Type your answer here:
3. Develop a model (diagram) that shows how different amounts of gravitational potential energy (GPE) are stored in the earth-ball system when the ball is raised to different heights on the ramp.
Type your answer here:
4. How did you use what you learned from the first part of the experiment to design a marble run?
Type your answer here:
Answers
I used the results from the first part of the experiment to design a marble run by understanding the principles of potential and kinetic energy.
What is kinetic energy?Kinetic energy is the energy of motion. It is the energy an object has due to its motion. When an object is moving, it has kinetic energy. This energy is dependent on the mass of the object and its velocity. Kinetic energy can be calculated by multiplying the mass of the object by the square of its velocity and then dividing the result by two. Kinetic energy is one of the two main types of energy, along with potential energy. It has the ability to cause change within a system, such as breaking chemical bonds. When an object is at rest, it does not have kinetic energy. However, as soon as it begins to move, it acquires kinetic energy. Kinetic energy can be changed or transferred from one object to another, or from one form to another.
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Complete the balanced dissociation equation for the compound below in aqueous solution. If the compound does not dissociate, write NR after the reaction arrow. Be sure to include the proper phases for all species within the reaction.
ZnCl2-
Answers
The balanced dissociation equation of the ionic compound ZnCl₂ is given below:
ZnCl₂ (aq)→ Zn²⁺ (aq) + 2 Cl⁻ (aq) What is a dissociation equation of a chemical reaction?A dissociation equation of a chemical reaction is a n equation which shows the products formed when an ionic substance is dissolved in an aqueous solution to produce ions.
A dissociation reaction results in the formation of ions and occurs only in ionic compounds
The dissociation of the ionic compound ZnCl₂ is shown below:
ZnCl₂ (aq)→ Zn²⁺ (aq) + 2 Cl⁻ (aq)From the equation above, the ionic compound zinc chloride is dissolved in water. The dissolution of the compound inn water results in the free dissociation or separation of the ions present in the crystal structure of the compound.
The compound dissociates to produce two moles of chloride ions and one mole of zinc (ii) ions. This is because the charge on the zinc ion is +2 while that on the chloride ion is -1.
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2 A high school student takes a lump of magnesium with a volume of 150.0 mL and adds it to a beaker of
an aqueous solution of aluminum nitrate. What is the mass of the solid aluminum that forms?
Solid magnesium has a density of 1.738 g/cm³.
Answers
The mass of the solid aluminum that forms are 192.73 grams
To determine the mass of solid aluminum that forms, we need to use stoichiometry and the balanced chemical equation for the reaction between magnesium and aluminum nitrate.
The balanced chemical equation is:
3 Mg + 2 Al(\(NO_{3}\))3 → 3 Mg(\(NO_{3}\))2 + 2 Al
The equation shows that 3 moles of magnesium react with 2 moles of aluminum to produce 2 moles of aluminum nitrate.
To calculate the mass of solid aluminum, we need to know the amount of magnesium used. Given that the volume of the magnesium is 150.0 mL and its density is 1.738 g/cm³, we can calculate the mass of magnesium using the formula:
Mass = Volume × Density
Mass of magnesium = 150.0 mL × 1.738 g/cm³ = 260.7 g
Now, using the molar mass of magnesium (24.31 g/mol) and the molar ratio from the balanced equation, we can determine the moles of magnesium used:
Moles of magnesium = Mass of magnesium / Molar mass of magnesium
= 260.7 g / 24.31 g/mol
= 10.72 mol
According to the stoichiometry of the balanced equation, the ratio of moles of magnesium to moles of aluminum is 3:2. Therefore, the moles of aluminum formed will be:
Moles of aluminum = (2/3) × Moles of magnesium
= (2/3) × 10.72 mol
= 7.15 mol
Finally, we can calculate the mass of solid aluminum using its molar mass (26.98 g/mol):
Mass of aluminum = Moles of aluminum × Molar mass of aluminum
= 7.15 mol × 26.98 g/mol
= 192.73 g
Therefore, the mass of the solid aluminum that forms is approximately 192.73 grams.
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Which of these statements about heating up land and water is true?
Question 1 options:
Land and water are heated to the same temperature.
Land is heated through radiant energy.
Land heats up slower than water.
Land is heated by conduction.
Answers
Answer:
the land is heated through radiant energy,
Explanation:
A liquid ester used to flavour food is believed to be impure. What would be the best way of testing its purity?
Answers
Answer:
Filter it
Explanation:
How many particles are in 67.9 grams of water (H2O)?
Answers
Answer:
3.769022740695677
Explanation:
Answer:We get 1.81×1024 water molecules... Explanation: We assess the molar quantity of water in the usual way... Number of moles=massmolar mass.
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Which of the following is a buffer system?
A. NaCl and NaNO3
B. H2CO3 and KHCO3
C. HCl and NaOH
D. H2O and HCl
E. NaCl and NaOH
Answers
Answer:
B. H2CO3 and KHCO3
Explanation:
The buffer system is a system in which the solution deny for change in the ph level i.e. at the time when the acid is added to it. It can be made either in a weak acid and salt or can be a weak base and its salt. Now when the acid is added to a buffer so the ratio is not impacted due to which it does not change sufficient for pH level
As per the given options, the third one is correct as the H2CO3 denotes a weak acid and the KHCO3 represents the salt. And these two solution does not create any change in the level of pH
Therefore the option B is correct
Calculate the [OH-] and [H3O+] for 0.00016 M NaOH. Answer in units of M for both answers.
Answers
The question requires us to calculate the concentration, in mol/L, of H3O+ and OH- ions for a 0.00016 M NaOH solution.
Since NaOH is a strong base, we can consider that it completely dissociates in water:
\(NaOH_{(aq)}\to Na^+_{(aq)}+OH^-_{(aq)}\)From the dissociation reaction shown above, we can say that the concentration of OH- ions in a NaOH solution will be the same as the concentration of NaOH.
Thus: [OH-] = 0.00016 mol/L
Now, we can apply the ion-product constant of liquid water (Kw) to calculate the concentration of H3O+ ions:
\(\begin{gathered} K_{w_{}}=\lbrack H_3O^+\rbrack\times\lbrack OH^-\rbrack \\ \lbrack H_3O^+\rbrack=\frac{K_w}{\lbrack OH^-\rbrack} \end{gathered}\)Since the value of [OH-] is 0.00016 M and considering the value of Kw as 1.00 x 10^-14, we calcuate [H3O+]:
\(\lbrack H_3O^+^{}\rbrack=\frac{1.00\times10^{-14}}{0.00016}=6.3\times10^{-11}mol/L\)Therefore, the concentration of [OH-] and [H3O+] ions are 1.6 x 10^-4 and 6.3 x 10^-11 M, respectively.
write any 5 seasonal plants
Answers
Answer:
1. Vinca
2.Zinnia
3.Cornflower
4.Mariglod
4.Geranium
Explanation:
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What mass of water is produced from the complete combustion of 6.60×10−3 g of methane?
Answers
Map of structure of an Atom?
Answers
Atoms are made up of a very tiny, positively charged nucleus that is encircled by a sea of negatively charged electrons. Despite often being less than a tenth of an atom's size, the nucleus makes up more than 99.9% of the atom's mass.
What is the structure of an Atom?The term "atomic structure" describes the structure of an atom, which has a nucleus (centre) that contains both protons (positively charged) and neutrons (neutral). The centre of the nucleus is circled by the negatively charged electrons.
Positively charged protons, negatively charged electrons, and neutral neutrons make up the three types of subatomic particles that make up an atom. Nearly equal in mass, protons and neutrons are found in the dense nucleus of the atom.
Thus, Atoms are made up of a very tiny, positively charged nucleus that is encircled by a sea of negatively charged electrons.
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Which equation correctly describes the dissociation of sodium sulfate into ions in an aqueous media?
a. Na2SO4(aq) → 2Na+(aq) + SO42-(aq)
b. Na2SO4(aq) → 2Na+(aq) + S6+ (aq) + 4O2-(aq)
c. Na2SO4(aq) → Na2+(aq) + SO42-(aq)
d. Na2SO4(aq) → Na2S(aq) + 2 O2(g)
Answers
Na₂SO₄ (aq) → 2Na⁺ (aq) + SO4²⁻ (aq) correctly describes the dissociation of sodium sulfate into ions in an aqueous media
What is the dissociation reaction?Dissociation reactions are those reactions in which a molecule dissociates into their constitute ions.
In the question, dissociation of sodium sulfate takes place as follow:
Na₂SO₄ (aq) → 2Na⁺ (aq) + SO4²⁻ (aq)
Above reaction shows the dissociation of Na₂SO₄ where in the right side sodium ion is present in the +1 oxidation state and sulfate ion is present in the -2 oxidation state.
Hence, option (a) is correctly describes the dissociation.
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describe the trends in the atomic size, location energy and electrongavity from left to right across a period in periodic table
Answers
Atomic size decreases in a period but the ionization energy and electronegativity increases across a period.
Describe the trends in the atomic size, ionization energy and electronegativity?Atomic radius decreases across a period because of nuclear charge increases whereas atomic radius of atoms generally increases from top to bottom within a group because there is again an increase in the positive nuclear charge.
Ionization energy increases when we move from left to right across an period and decreases from top to bottom.
Electronegativity also increases from left to right across a period and decreases from top to bottom.
So we can conclude that atomic size decreases in a period but the ionization energy and electronegativity increases across a period.
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Calculate the volume in mL of 0.727 M Ca(OH)2 needed to neutralize 22.8 mL of 0.390 M H3PO4 in a titration.
Answers
51.4 mL is the volume in mL of 0.727 MCa(OH)₂ needed to neutralize 22.8 mL of 0.390 M H₃PO₄ in a titration.
A measurement of three-dimensional space is volume. It is frequently expressed in numerical form using SI-derived units or different imperial or US-standard units (such the gallon, quart, and cubic inch). Volume and length (cubed) have a symbiotic relationship.
The volume much a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the volume of fluid (liquid or gas) that the container may hold.
2H₃PO₄ + 3Ca(OH)₂ —> Ca₃(PO₄)₂ + 6H₂O
MaVa / MbVb = nA / nB
( 0.390 × 22.8) / (0.727 × Vb) = 2/3
Vb = 51.4 mL
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