Answer:
Element Symbol Mass Percent
Chlorine Cl 28.930%
Oxygen O 39.166%
Potassium K 31.904%
Explanation:
Again, out my module hope this is helpfull!
I DONT NEED HELP JUST GIVING YOU GUYS THE ANSWER I TOOK THE TEST! Which statement explains how two gases at the same temperature can diffuse at different rates?
They have different molar masses but the same velocities.
Their average kinetic energies are the same, but the smaller molecules have faster velocities.
Their kinetic energies differ, but their masses are the same.
They have the same masses but different velocities.
The answer is: Their average kinetic energies are the same, but the smaller molecules have faster velocities.
The average kinetic energies of gas molecules are the same, but the smaller or lighter molecules have more velocities. Therefore, option (B) is correct.
What is average kinetic energy?The average kinetic energy of a molecule can be described as:
[tex]{\displaystyle K.E.=\frac{3}{2}kT[/tex]
Where T is temperature (K) and k is Boltzmann constant.
All molecules of a gas are identical in mass and size but they differ from gas to gas. The gas molecules are separated by large distances so that the real volume of the molecules is negligible as compared to the total volume.
The force of attraction between molecules is negligible and molecules are supposed to be moving in different directions with different velocities. The collision between gas molecules is perfectly elastic so that no energy is wasted during a collision.
Since gas molecules are moving at different velocities ao they possess different kinetic energies. The average kinetic energy is directly proportional to the temperature (Kelvin).
Learn more about average kinetic energy, here:
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What is the mass of the ethanol that exactly fills a 200.0 mL container? The density of ethanol is 0.8 g/mL. please help
You have a stomach-ache and determine that your stomach is too acidic. Which of the
following medications would you take and why? Use a model to explain your choice?
(Attach your model to the next question.)
1. weak acid
2. strong acid
3. weak base
4. strong base
Answer: you would use a weak base, as you want to combat acidity but do not want to damage your stomach. an example is tums™ which use carbon carbonate, a base.
Hope this helps, and if it did mind marking me brainliest? thanks >//-//<
mg+o2 balanced eaquation
Answer:
2Mg+O2=2MgO
balanced equation
hope it helps.
Answer:
Oroduct is mgo and it is balanced equation
Because both MG and o² have valence 2
More points 50 And First to Anwser gets Brainlyest
Answer:
the answer I believe is C
Answer:
The last one
Explanation:
A hormone travels through the circulatory system to deliver a signal. A white blood cell produces antibodies. A chemical signal is transmitted between the cells of two organisms. A molecule released from one cell signals one near, but not directly adjacent.
Hope this helps
PLS HELP MEEEE I REALLY NEED HELP
Answer:
the answeer is c.
Explanation:
describe the relationship between the amount of C-15 and time?
Answer:
As time increases, C-15 (Carbon) decreases. During radioactive decay, the amount of Carbon in a substance undergoes half-lives (A sample could have a half life of 1002 years, for example.) When that substance ages to that timeframe, it loses half of its mass. Then for the next half-life, it loses half of that new mass, and so on.
(2.22 x 10^6cm) x (5.5 x 10^-5m) answer in scientific notation.
Answer:
12.21 x 10⁻¹ m
Explanation:
Given:
(2.22 x 10⁶cm) x (5.5 x 10⁻⁵m)
Find:
Solution;
Computation:
(2.22 x 10⁶cm) x (5.5 x 10⁻⁵m)
[2.22 x (10⁶/100)m] x (5.5 x 10⁻⁵m)
[2.22 x 10⁴m] x (5.5 x 10⁻⁵m)
12.21 x 10⁻¹ m
The a ______ planet is from the sun, the _______ it takes the planet to revolve around the sun. Making the "year" for that planet Longer
Answer:
Farther; longer.
Explanation:
In the early nineties When the research on solar system first started it was found out that the solar system has 9 planets which are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Pluto which is considered as the number 9 of the planets in the solar system has been removed in the year 2006 and labelled as a "dwarf planet'' hence, Neptune is considered as the farthest planet from the Sun.
The farther the planets are from the sun, the longer it will take them to orbit round the sun. For instance, it only takes around 87.97 days for mercury(first planet nearer to the sun) to orbit round the sun, while it takes the earth (third planet nearer to the sun) 365 1/4 days to orbit round the sun.
What is the name of these ionic compounds? I WILL GIVE 20 POINTS AND BRAINLIEST!!!!!!!
1. CsBr
2. Ag2S
3. NiCl3
4. CaI2
5. BeO
6. BaSO4
7. Cr2(CO3)3
8. Li3N
9. SnF2
10. Cu(C2H3O2)2
1.chloride
2.sulfate
3.ferric
4.bromide
5.binary
6.ammonium
7.nirate
8.fluroide
give me brainliest as per your question ok
Answer:
6; barium sulfate
7; chromium (III) carbonate
Write the Formulas for these ionic compounds:
1) Tin(IV) oxide
2) Aluminum oxide
3) Silver sulfide
4) Copper (II) sulfate
5) Potassium carbonate
Answer:
1. Tin(IV) oxideTin(IV) oxide, also known as stannic oxide, is the inorganic compound with the formula SnO₂. The mineral form of SnO₂ is called cassiterite, and this is the main ore of tin. With many other names, this oxide of tin is an important material in tin chemistry. It is a colourless, diamagnetic, amphoteric solid.
Formula: SnO₂
Molar mass: 150.71 g/mol
Melting point: 1,630 °C
Density: 6.95 g/cm³
2. Aluminum oxideAluminium oxide is a chemical compound of aluminium and oxygen with the chemical formula Al₂O₃. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(III) oxide.
Formula: Al₂O₃
Molar mass: 101.96 g/mol
Melting point: 2,072 °C
Density: 3.95 g/cm³
Boiling point: 2,977 °C
ChemSpider ID: 14086
ChemSpider ID: 26988
3. Silver sulfideSilver sulfide is an inorganic compound with the formula Ag ₂S. A dense black solid, it is the only sulfide of silver. It is useful as a photosensitizer in photography. It constitutes the tarnish that forms over time on silverware and other silver objects.
Formula: Ag2S
Molar mass: 247.8 g/mol
Density: 7.23 g/cm³
ChemSpider ID: 145878
4. Copper (II) sulfateCopper(II) sulfate, also known as copper sulphate, are the inorganic compounds with the chemical formula CuSO₄ₓ, where x can range from 0 to 5. The pentahydrate is the most common form. Older names for this compound include blue vitriol, bluestone, vitriol of copper, and Roman vitriol.
Formula: CuSO4
IUPAC ID: Copper(II) sulfate
Molar mass: 159.609 g/mol
Density: 3.6 g/cm³
Melting point: 110 °C
Soluble in: Water
5. Potassium carbonatePotassium carbonate is the inorganic compound with the formula K₂CO₃. It is a white salt, which is soluble in water. It is deliquescent, often appearing as a damp or wet solid. Potassium carbonate is mainly used in the production of soap and glass.
Formula: K2CO3
Molar mass: 138.205 g/mol
IUPAC ID: Potassium carbonate
Density: 2.43 g/cm³
Melting point: 891 °C
Soluble in: Water
Explanation:
Hope it is helpful....
How many moles of aluminum are in 95.0 grams of aluminum
Answer:
26.981538 just looked at it.
how many moles of Mg is 3.5 x 10^27 atoms of Mg
mmg mmñm
Explanation:
no lo seeee123456789
what is the chemical reaction that occurs during photosynthesis
Answer:
endothermic change occurs
Explanation:
photosynthesis, is an endothermic reaction in which energy is absorbed from the surrounding.
hope this helps
alkanes,
General Formula: C, H 2n+2
Carbon Names Molecular Formula
C2H6
Ethane
Unknown No. of
Carbon (n)
Ex. If n= 2
1.If n = 4
2. If n= 5
3. If n = 7
4. If n = 8
5. If n= 9
Firstly ALKANES FORMULA IS CnH2n+2
C4H10 Butane
C5H12 Pentane
C7H16 Hectane
C8H18 Octane
C9H20 Nonane
Compare and contrast a neutral atom and an ion.
Answer:
Atoms are neutral. They contain the same number of protons and electrons. An ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion.
Explanation:
Hope this helped
CO2+ H2O + hν → C6H12O6 + O2
ayudenme plisss
Answer:
This is the balanced equation I believe-
6CO2 + 6H2O → C6H12O6 + 6O2
However, that is without the HV because I’m not sure what the hv means.
Two cars that are identical except for their color are traveling on the same road.
The red car is traveling at a speed of 78 km/hr, and the blue car is traveling at a speed of 106 km/hr. Which of the following statements is true?
A.
Neither car has any kinetic energy.
B.
The blue car has more kinetic energy than the red car.
C.
The cars have the same kinetic energy.
D.
The red car has more kinetic energy than the blue car.
Why are sulphur and oxygen in group 6 in terms of electronic configuration
Answer: Because sulfur is directly below oxygen in the periodic table, these elements have similar electron configurations. As a result, sulfur forms many compounds that are analogs of oxygen compounds, as shown in the table below. ... O=O. double bonds are much stronger than S=S double bonds.
Sand dunes are large piles of of sand that can be found in the dessert. What causes these sand dunes to form
A. Ice
B. Wind
C. Earthquakes
D. Volcanoes
What type of Star is this?
Answer:
rock star
Explanation:
Which of the following best describes chicken noodle soup? * picture below.
Answer:
Chicken noodle soup would be considered a mixture.
If a compound has 27.36 % Na, 1.20 % H, and 57.14% 0, with the rest being
carbon. What is the percent of carbon in the compound?
Answer:
14.3% C
Explanation:
27.36 + 1.20 + 57.14 = 85.7
100 - 85.7 = 14.3%
c. How many grams of NH3 react completely with 75.0 grams of PbO?
Answer:
3.81 g NH3
Explanation:
friends with chemist
What is the ph value of neutral substance
Answer:
Acidity and alkalinity are measured using a pH scale, for which 7.0 is neutral. The lower a substance's pH (less than 7), the more acidic it is; the higher a substance's pH (greater than 7), the more alkaline it is. Average rain has a pH of about 5.6; it is slightly acidic because carbon dioxide (CO2) dissolves into it, forming weak carbonic acid. Acid rain usually has a pH between 4.2 and 4.4. The most common nitrogen-related compounds emitted into the air by human activities are nitrogen oxides. Ammonia is another nitrogen compound emitted into the atmosphere, primarily from agricultural activities and fossil fuels. Most of the nitrogen oxides released in the U.S. due to human activity are from the burning of fossil fuels associated with transportation and industry.
Explanation:
If 22.5 moles of Na are produced in the reaction, how many moles of Cl2 are produced as well?
William Shakespeare (bapt. 26 April 1564 – 23 April 1616)[a] was an English playwright, poet, and actor, widely regarded as the greatest writer in the English language and the world's greatest dramatist.[2][3][4] He is often called England's national poet and the "Bard of Avon" (or simply "the Bard").[5][b] His extant works, including collaborations, consist of some 39 plays,[c] 154 sonnets, two long narrative poems, and a few other verses, some of uncertain authorship. His plays have been translated into every major living language and are performed more often than those of any other playwright.[7] They also continue to be studied and reinterpreted.
Shakespeare was born and raised in Stratford-upon-Avon, Warwickshire. At the age of 18, he married Anne Hathaway, with whom he had three children: Susanna and twins Hamnet and Judith. Sometime between 1585 and 1592, he began a successful career in London as an actor, writer, and part-owner of a playing company called the Lord Chamberlain's Men, later known as the King's Men. At age 49 (around 1613), he appears to have retired to Stratford, where he died three years later. Few records of Shakespeare's private life survive; this has stimulated considerable speculation about such matters as his physical appearance, his sexuality, his religious beliefs, and whether the works attributed to
Identify the type of reaction and the products. Ba+O2 ->
Answer:
Explanation:
The is barium and oxygen in here
barium+ oxygen-> barium oxide
barium + oxygen -> barium peroxide
A reaction requires 22.4 L of gas at STP. You have 50.0 L of gas at 101.5 kPa and 373 K.
Which statement is true?
Answer: D: You will have excess gas for this reaction
Explanation: I just took the test
Matter can be pressed in case of a.solid b.gas c. liquid d.solid and liquid
Answer:
I not sure if this is right but maybe b since its particles is more spread out?
How many moles hydrogen can be produced from 4.53 moles of
aluminum?
Answer:
The answer to this question is 2.