Answer:
9 g/ml
Explanation:
5 + 3.3 = 8.5
But you should use sig figs.
5 has no tenths, hundredths, and etc.
Therefore the 8.5 rounds up to 9
So the answer is 9.
If something is up higher it will have ________________ potential energy.
the same
more
less
Answer:
More
Explanation:
Which statement accurately compares the properties of 1.00 mole of oxygen (O2) and 1.00 mole of
sodium (Na)? The oxygen -
O Contains more particles than sodium
O Contains less particles than sodium
O has a smaller mass than sodium.
O has a larger mass than sodium
What does the formula of an ionic compound tell you?
Answer:
The overall ionic formula for a compound must be electrically neutral, meaning it has no charge. When writing the formula for the ionic compound, the cation comes first, followed by the anion, both with numeric subscripts to indicate the number of atoms of each.
Explanation:
Which statements apply to density? Check all that apply.
O Density is a chemical property of an object.
The density of an object is constant.
Density is a derived unit of measure.
Density is the sum of the mass and volume of an object.
The density of an object determines whether it will sink or float.
Answer:
the density of an object determines whether it will sink or float
Answer:
Its B,C,E
Explanation:
Given the following reaction, how many molecules of H2O will be formed from 200.0g of NaOH?
2 NaOH + H2SO4 -> 2 H2O + Na2SO4
Answer:
30.11×10²³ molecules
Explanation:
Given data:
Mass of NaOH = 200.0 g
Number of molecules of water formed = ?
Solution:
Chemical equation:
2NaOH + H₂SO₄ → 2H₂O + Na₂SO₄
Number of moles of NaOH:
Number of moles = mass/molar mass
Number of moles = 200 g/ 40 g/mol
Number of moles = 5 mol
Now we will compare the moles of NaOH and H₂O.
NaOH : H₂O
2 : 2
5 : 5
Number of molecules of water:
1 mole contain 6.022×10²³ molecules
5 mol × 6.022×10²³ molecules / 1mol
30.11×10²³ molecules
When do you identify your variables?
After the results
After the conclusion
Before the hypothesis
Before the question
Answer:
Before the hypothesis
Explanation:
From where do nuclear power plants get uranium?
Answer:
Uranium mines operate in many countries, but more than 85% of uranium is produced in six countries: Kazakhstan, Canada, Australia, Namibia, Niger, and Russia. Historically, conventional mines open pit or underground were the main source of uranium.
Explanation:
Hope this helps
Anna was looking at a map that showed where hurricanes had formed. She noticed that more hurricanes formed over tropical oceans than over colder ocean areas. Which of these best explains
why more hurricanes form over tropical oceans?
Water has fewer currents in tropical oceans than in colder oceans.
Air has less moisture over tropical oceans than over cold oceans.
Water has more waves in tropical oceans than in colder oceans.
Air has more moisture over tropical oceans than over
Answer: D
Explanation:
I need help really bad with this!!!
For the following:
Highlight each subscript in RED.
Highlight each coefficient in BLUE.
H2O 5Cl2 2Mg 3H2O2
For the following
List the chemical symbols of each element.
Give the number of atoms of each element.
HCl CO2 Na2SO4
Balance the following chemical equations.
1. Cu2O + C → Cu + CO2
2. H2O2 → H2O + O2
Al + Fe3N2 → AlN + Fe
4. Ag2S → Ag + S8
5. ZnS + AlP → Zn3P2 + Al2S3
6. Fe(OH)3 → Fe2O3 + H2O
Given the two chemical equations, highlight in RED the one that is balanced.
7. a. 2Na + Cl2 → 2NaCl
b. 2Na + 2Cl2 → 2NaCl
8. a. C3H8 + 5O2 → 3CO2 + 4H2O b. 2C3H8 + 5O2 → 3CO2 + 8H2O
9. a. 2NH3 + 5O2 → 2NO + 3H2O b. 4NH3 + 5O2 → 4NO + 6H2O
10. a. Y(NO3)2 + GaPO4 → YPO4 + Ga(NO3)2
b. 2Y(NO3)2 + 2GaPO4 → 2YPO4 + Ga(NO3)2
Answer:
Did u get the answers
Explanation:
The term "alchemy" refers to early pseudoscientific attempts to transform common
elements into more valuable elements (such as lead into gold), For one kind of atom to
become another kind of atom, which particle(s) of the atom need to be expelled or gained?
Proton
Electron
Neutron
Quantum Particles
Answer: The correct answer is option B. electron.
Explanation:
There are 3 subatomic particles:
Electrons: They carry negative charge and are present in orbits around the nucleus of an atom.Protons: They carry positive charge and are present inside the nucleus of an atomNeutrons: They does not carry any charge and are present inside the nucleus of an atom.An atom forms an ion, when it looses or gains an electron.
When an atom looses electron, it form a positive ion known as cation.When an atom gains electron, it form a negative ion known as anion.Hence, the correct answer is option B. electron.
The particle(s) of the atom that is needed to be expelled or gained in an alchemy process which involves transformation of one element into valuable elements or atom to another is B:Electron.
Alchemy can be regarded as branch of philosophical and protoscientific tradition that is traceable to China, and Europe. In the process of transformation of one element to another useful element or compounds , there is usually transfer of electron.Electronegative element like chlorine usually gain electron and are anion, while electropositive elements like potassium will loose electron( cation) all involves the transfer of electron.
Therefore, option B is correct.
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People's actions can cause air pollution. People can plant trees to help reduce air pollution.
How does planting trees help reduce air pollution?
O A Trees take in nitrogen and dust.
B. Trees block sunlight from reaching the ground.
O c Trees produce oxygen and take in carbon dioxide.
D. Trees add nutrients to the soil that other living things need
Answer:
c
Explanation:
A sample of gas has a volume of 20.0 mL at STP. What will the volume be if the temperature is changed to 546 K and the pressure is changed to 2.0 atm.? (show work plz)
The volume did not change, it remained at 20 ml
Further explanationGiven
20 ml a sample gas at STP(273 K, 1 atm)
T₂=546 K
P₂=2 atm
Required
The volume
Solution
Combined gas Law :
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
Input the value :
[tex]\tt \dfrac{1\times 20}{273}=\dfrac{2\times V_2}{546}\\\\V_2=\dfrac{1\times 20\times 546}{273\times 2}\\\\V_2=20~ml[/tex]
The volume does not change because the pressure and temperature are increased by the same ratio as the initial conditions (to 2x)
When 125g zinc carbonate is heated, 81g zinc oxide is produced.
Calculate the mass of carbon dioxide produced.
Mass of carbon dioxide=___g
Answer:
Mass of carbon dioxide= 44 g
Explanation:
Zinc carbonate → Zinc oxide + carbon dioxide
125 g = 81 g + X
X = 125 g-81 g
X = 44 g
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
When using the process of evaporation to separate a mixture, what is left behind
in the evaporating dish?
Answer:
When a solution is heated, the solvent evaporates, leaving behind the dissolved solids as residue. When a solution containing dissolved solutes is heated, the solvent will evaporate. Only the solute will remain in the evaporating dish.
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When using the process of evaporation to separate a mixture, solute is left behind in the evaporating dish
What is evaporation?
Evaporation is a sort of vaporization that occurs on a liquid's surface when it transitions from a liquid to a gas.
Evaporation is a separation technique that can be used to separate components of a combination including a decomposed solid in a liquid. The liquid gets evaporated, which means it is converted from a liquid to a gas. This frequently necessitates the use of heat. The solid will be all that remains after the liquid has entirely evaporated.
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How many grams of Aluminum Oxide are produced when 3.64 g of Aluminum reacts with an excess of Oxygen?
4Al + 3O2 → 2Al2O3
_ grams of Al2O3 (round to 3 sig figs)
Answer:
6.877649 or 6.88 grams of Aluminum OxideExplanation:
- If there are 4 moles of Al that equals 107.926156 grams of 4Al.
- If there is 2 moles of Al2O3 that equals 203.9226 grams.
So...
If 107.926156 grams of 4Al equals 203.9226 grams of 2Al2O3 then, 3.64g of Al equals x.
When 6.8776g of aluminium reacts with an excess of oxygen, 6.8776g of aluminium oxide are produced.
What is aluminium?Aluminium is a silvery-white metal with atomic number 13 in the periodic table.
What is aluminium oxide?Aluminium 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.
The synthesis of Aluminium oxide can be done by heating aluminium in the presence of oxygen. In this reaction, 4 moles of aluminium react with 3 moles of oxygen leading to the formation of 2 moles of aluminium oxide.
4Al + 3O2 → 2Al2O3
If there are 4 moles of Al that equals 107.926156 grams of 4Al
If there are 2 moles of Al2O3 that equals 203.9226g
If 107.9261 grams of 4Al equals 203.9226 grams of 2Al2O3 then, 3.64g of Al equals x
107.9261 / 3.64 = 203.9226 / x
(107.9261) x = (203.9226) 3.64
107.9261 x = 742.2782
dividing both LHS and RHS by 107.9261,
107.9261/107.9261x = 742.2782/107.9261
x = 6.8776g
Hence, 6.8776g of aluminium oxide are produced.
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what water has 97% of water
Answer:
ocean
Explanation:
because its easy
What does this quote mean to you?
"Lighten up on yourself. No one is perfect. Gently accept your humanness."
Answer:
To me it means no need to be so hard on yourself because nobody is perfect. You should love yourself for who you are and try to improve yourself everyday.
Explanation:
):)
How do we know that caramelizing sugar is a chemical change?
It involves dissolving sugar in water.
It changes the state of sugar from a solid to a liquid.
It separates sugar fromn a sugar solution.
It changes the sugar's color.
Answer:
Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Explanation:
caramel is the product of the sugar and hot water
Answer:
D It changes the sugars color
Explanation:
Because the change of color is a chemical change.
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A certain covalent compound contains sulfur bonded to chlorine. Which of the following statements about this compound is correct?
Question 5 options:
A)
Electrons will reside closer to sulfur, and the bond will be non-polar.
B)
Electrons will reside closer to sulfur, and the bond will be polar.
C)
Electrons will reside closer to chlorine, and the bond will be polar.
D)
Electrons will reside closer to chlorine, and the bond will be non-polar.
Answer:
C) Electrons will reside closer to chlorine, and the bond will be polar
Explanation:
Electrons tend to be closer or attracted to high electronegativity and sulfur has less electronegativity than chlorine. Therefore, electrons will reside closer to chlorine. To find out if it is polar or nonpolar, according to the electronegativity chart you can find online, you can see that the electronegativity of sulfur is 2.5 while the electronegativity of chlorine is 3.0. Because the difference between these two is a slight change, it would be slightly polar. So, the bond will be polar.
Answer:
Electrons will reside closer to chlorine, and the bond will be polar.
Explanation:
Which of the 3 sub particles of an atom, weighs the LEAST?
Answer:
Electron, as it carries a negative charge
Explanation:
name a lustrous non- metal ?
Answer:
it is iodine it seems very right
chemistry between people is the stongest like mine and urs right?
Answer:
..sure....
Explanation:
Answer:
hmm i dont see it homie sike gimmi that bootiy
Write the chief ore of sodium and potassium respectively?
Answer:
K-sylvite
Na-rock salt
Explanation:
Sylvite is a colourless or white mineral consisting of potassium chloride, occurring typically as cubic crystals(Oxford dictionary). It is the primary ore of potassium metal. It appears colorless, sometimes with a shade of red.
Rock salt is a primary ore of sodium. It is found in rocks, seas etc. Rock salt is sometimes commonly called halite. It usually appears white in colour and is rich in sodium.
what is a galvanic cell made of?
A. two electrodes in electrolyte solution
B. two beakers connected by a tube
C. two ceramic plates in pure water
D.two medal strips surrounded by air
Explanation:
A because A galvanic cell consists of two half-cells, such that the electrode of one half-cell is composed of metal A, and the electrode of the other half-cell is composed of metal B; the redox reactions for the two separate half-cells are thus: An+ + ne− ⇌ A.
Answer:
A
Explanation:
What time of the year can you see Scorpius
Answer:
In the northern hemisphere I believe, Scorpius is most visible by looking to the south during July and August around 10:00 PM. The constellation remains visible until mid-September. In the southern hemisphere, Scorpio appears very high in the northern part of the sky until close to the end of September.
Answer:
October 23 to November 21
Explanation:
Not entirely sure what you are asking. . .
If we're talking Scorpius as in:
Scorpius is one of the constellations of the zodiac and is located in the Southern celestial hemisphere. Its name is Latin for scorpion, and its symbol is. (Unicode ♏).
What is the molecular formula of a compound that is 51.02 % carbon, 13.80 % hydrogen, and 35.18 %
oxygen? The molecular mass is 88.0 g/mol.
Answer:
Molecular formula = C₄H₁₂O₂
Explanation:
Given data:
Percentage of hydrogen = 13.80%
Percentage of carbon = 51.02%
Percentage of oxygen = 35.18%
Molecular formula = ?
Solution:
Number of gram atoms of H = 13.80 / 1.01 = 13.6
Number of gram atoms of O = 35.18 / 16 = 2.2
Number of gram atoms of C = 51.02 / 12 = 4.25
Atomic ratio:
C : H : O
4.25/2.2 : 13.6/2.2 : 2.2/2.2
2 : 6 : 1
C : H : O = 2 : 6 : 1
Empirical formula is C₂H₆O.
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass = C₂H₆O = 46 g/mol
n = 88 / 46
n = 2
Molecular formula = n (empirical formula)
Molecular formula = 2 (C₂H₆O)
Molecular formula = C₄H₁₂O₂
8. __H2 + __O2-> __H2O
9. __K2SO4 + __H2-> __H2SO4 + __K
10. __NO2 + __H2O-> __HNO3 + __NO
Anser:
Explanation:
hope this helps
Match the term with its description.
Match Term Definition
Chloroplast A) A green pigment present in all plants that absorbs light to provide energy for photosynthesis
Chlorophyll B) An organelle that contains chlorophyll and in which photosynthesis takes place
Energy C) A capacity to do work that can produce physical changes within living and nonliving systems
Glucose D) A type of sugar that is produced during photosynthesis to store chemical energy
Answer:
Chloroplast: An organelle that contains chlorophyll and in which photosynthesis takes place
Chlorophyll: A green pigment present in all plants that absorbs light to provide energy for photosynthesis
Energy: A capacity to do work that can produce physical changes within living and nonliving systems
Glucose:A type of sugar that is produced during photosynthesis to store chemical energy
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Answer: look at picture for the answer, and I showed that I got it right as well. It was worth 4 points and I got all 4. Brainiest please, if you don't mind <3
What is true about a chemical reaction
Answer: energy is transferred, but it can go to the products or the reactants.
Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.
What are two uses of carbon?
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Carbon fibre is finding many uses as a very strong, yet lightweight, material. It is currently used in tennis rackets, skis, fishing rods, rockets and aeroplanes.Impure carbon in the form of charcoal (from wood) and coke (from coal) is used in metal smelting. It is particularly important in the iron and steel industries.[tex]{\huge{\underline{\small{\mathbb{\blue{HOPE\:HELPS\:UH :)}}}}}}[/tex]
