Answer: they have the same amount of particles
Explanation:
This statement is true by Avogadro's Law, which states that in a mole of any substance, there are [tex]6.022 \times 10^{23}[/tex] particles.
A balloon sits in the sunlight causing it to heat up and explode. Which of the following
explains what happened the best:
a. the particles of gas inside the balloon moved faster and decreased pressure in
the balloon, causing it to explode
b. the particles of gas inside the balloon moved faster and increased pressure in
the balloon, causing it to explode
c. the particles of gas outside the balloon moved faster and decreased pressure
on the balloon, causing it to explode
d. the particles of gas outside the balloon became more excited moved faster and
increased pressure on the balloon, causing it to explode
A 609 ml sample of naoh has a ph of 13.5292. if 594 ml of distilled water was added to the initial naoh solution, what would the new ph of the solution be g
The new pH of the solution after the addition of water would be 13.22.
Total volume of the solutionV(total) = 609 ml + 594 ml
V(total) = 1203 ml
Concentration of waterC = (594 ml)/(1203 ml)
C = 0.493
pOH = -log(0.493)
pOH = 0.31
New pH of the solution = 13.5292 - 0.31 = 13.22
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A graduated cylinder is filled to 12.5 mL
with water and a piece of tin is placed
in the cylinder, displacing the level to
16.8 mL.
What is the volume of the tin piece in
cubic centimeters?
[?] cm³
Record your answer to the tenths place.
Volume (cm³)
The volume of the tin piece in cubic centimetres is 4.3 cm³
What is a graduated cylinder?A graduated cylinder is a standard piece of laboratory glassware used to measure the volume of an object or amount of liquid. As its name indicates, it is a glass cylinder with marks along the side similar to those on a measuring cup.
When adding an object to a liquid, the displayed volume difference corresponds to the volume of the added object.
In this way, to find the value of the object's volume, subtract the initial volume from the final volume:
16.8ml - 12.5ml = 4.3ml
To convert to cubic centimetres, the conversion scale of volume and length measurements need to be used, finding that mL is equal to cubic centimetres. So, the final answer is:
4.3 cm³
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9- Which pair of formulae represents two alkanes? (1 mark)
A)CH4 and C8H18
B)C₂H6 and C5H8
C) C3H6 and C5H12
D) C₁0H8 and C4H8
Answer:
A) CH4 and C8H18
Explanation:
General Formula for an Alkane = CnH2n+2This means for every number of Carbon (C) atoms, there are twice as many Hydrogen (H) atoms with an additional two added onto that.Therefore, if there is one Carbon Atom, and we multiply that by two, and then add an additional two, we get 4 Hydrogen atoms, so CH4, which is our first FormulaeSecondly, if we have eight Carbon Atoms, and we multiple that by two (16), and then add an additional two, we get 18 Hydrogen atoms, so C8H18, which is our second FormulaeThe other Formulas do not follow this 'General Formula'A sealable bag holds 3.79 L of
gas. How many moles of H₂
gas are needed to fill the bag
at 1.0 atm and 293 K?
The H₂ gas are needed 0.157moles to fill the bag .
For solving this problem we use the ideal gas equation. It is also called the general gas equation . This equation use for a hypothetical ideal gas. . It has several limitations. It was first stated by Benoit Paul Emile Clapeyron in 1834 . The ideal gas law is written by an empirical form:
PV = n R T
where-
P = Pressure
V = volume
T = Temperature
n = The amount of substance
R = Ideal gas constant
Now we have the values of these terms as-
P = 1 atm , V = 3.79L , T = 293K
and R = 0.0826 L/atm
For getting moles of hydrogen we can use the values of variables in ideal gas equation as -
P V = n R T
Now (1 atm) × ( 3.79L ) = n × ( 0.0826 L/atm) × ( 293K)
n = (1 × 3.79) ÷ (0.0826 x 293)
= 0.157 moles
So that the 0.157moles of H₂ gas are needed for fill the bag .
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what is formed when mixing a weak acid and strong base
Explanation:
when a weak acid and a strong based are mixed they react the pH can be determined by consider ing the equilibrium
How many grams of aluminum
chloride, AlCl3, form when 0.25 mol
Al react?
2AI+ 3Cl₂ → 2AICI 3
[?] g AICI 3
From the equation, we know that for every 2 moles of aluminum consumed, 2 moles of aluminum chloride are produced.
This means that if 0.25 moles of Al react, then 0.25 moles of aluminum chloride are produced.
The atomic mass of Al is 26.9815385 g/mol.The atomic mass of Cl is 35.45 g/mol.So, the formula mass of aluminum chloride is:
26.9815385+3(35.45)=133.3315385 g/mol.Thus, 0.25 moles have a mass of:
(133.3315385)(0.25), which is about 33 g (to 2 sf)The work of which scientist was most essential to the use of radioactive isotopes in medicine
The work of John Lawrence scientist was most essential to the use of radioactive isotopes in medicine.
Which scientist use of radioactive isotopes in medicine?John Lawrence was the first scientist that use a radioactive isotope in the treatment of a human disease. He became known as the father of nuclear medicine and his laboratory is considered the birthplace of this field.
So we can conclude that the work of John Lawrence scientist was most essential to the use of radioactive isotopes in medicine.
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The difference in an area with high concentration and an area with low concentration is called.
The difference in an area with high concentration and an area with low concentration is called the concentration gradient.
What is Concentration Gradient ?
A concentration gradient occurs when the concentration of particles is higher in one area than another.
In passive transport, particles will diffuse down a concentration gradient, from areas of higher concentration to areas of lower concentration, until they are evenly spaced.
This difference in an area with high concentration and an area with low concentration is called the concentration gradient.
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What is the name of this compound
Hydrobrome Aicd
I think so...
Answer:
[tex]\fbox {1,2-di bromo pentane}[/tex]
Explanation:
⇒ Bromine atoms present on 1st and 2nd Carbon atoms
⇒ 5 carbon atoms
⇒ Only single bonds
Hence, the IUPAC name will be :
1,2-dibromopentane
What does the NaBr + Cl₂ represent
in the reaction?
NaBr + Cl₂ →>>
NaCl + Br₂
Answer:
The reactants
Explanation:
The molecules on the left side of the reaction are the reactants. Reactants are the molecules which react with one another to form something new.
The molecules on the right side of the reaction are the products. Products are the molecules that form in response to the reaction.
Which quantity is held constant for Boyle's law, Gay-Lussac's law, and Charles's law?
volume
mass
temperature
pressure
Boyle's law: in Boyle's law, pressure of a gas in inversely proportional to the volume while the temperature is shield constant
TemperatureGay-Lussac's law: In Gay-Lussac's law, pressure of a gas in directly proportional to the temperature while the volume is held constant.
VolumeCharles's law: In Charles's law, the volume of a gas is directly proportional to the temperature while the pressure is held constant.
PressureWhen molten magma rises to the surface it cools ________, forming ________ igneous rocks.
A. slowly, extrusive
B. slowly, intrusive
C. rapidly, intrusive
D. rapidly, extrusive
Answer:
B)Slowly, intrusive
Question 3
Not yet
answered
Points out of
If you dissolve 2.70 g of NaCl in 425 mL of water, what is the molarity of the
solution? (Report your answer to three places past the decimal point. Moodle is
looking for a number only, no units.)
I added a screenshot because I recently answered the same question. I hope this helps you!! :)
How to convert °c 40 to °f
Answer:
104 f
Explanation:
multiply 40 by 1.8 and then add 32
What is the common uses of bases
Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture.
Answer:
Dalton law states that the partial pressure of a gas in a mixture of gases is equal to the total pressure of the mixture.
When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solutions
1)evaporation/crystallization
2)filtration
3)condensation
4)nuetralisation
Explanation:
Making a salt from an alkali
If you are using an alkali - which is a soluble base - then you need to add just enough acid to make a neutral solution (check a small sample with universal indicator paper).
Warm the salt solution to evaporate the water. You get larger crystals if you evaporate the water slowly.
How many grams of NaCl can be created from 9.8 moles of HCl? (molar mass of NaCl= 58.44g, HCl=36.46g)
The mass of NaCl that can be produced from 9.8 moles of HCl is 572.712 g
Balanced equation2Na + 2HCl --> 2NaCl + H₂
From the balanced equation above,
2 moles of HCl reacted to produced 2 moles of NaCl.
Therefore,
9.8 moles of HCl will also react to produce 9.8 moles of NaCl
How to determine the mass of NaClMolar mass of NaCl = 58.44 g/molMole of NaCl = 9.8 molesMass of NaCl =?Mass = mole × molar mass
Mass of NaCl = 9.8 × 58.44
Mass of NaCl = 572.712 g
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PLS HELP ME ASAP ILL GIVE BRAINLIEST
Which statement best describes how a Geiger counter works?
Select one:
a. Water vapor condenses along a path traveled by ionizing radiation.
b. Particles ionized by radiation cause black streaks to appear on sensitive photographic paper.
c. Radioactive particles ionize argon gas in a tube and the resulting electric current is amplified and heard as a clicking sound.
d. A material sensitive to radioactive emissions glows when mixed with a radioactive substance.
Answer:
the answer is c
Explanation:
c. Radioactive particles ionize argon gas in a tube and the resulting electric current is amplified and heard as a clicking sound.
What is the empirical formula for the molecular formula given? Molecular formula: C5H12O
What is the empirical formula for the molecular formula given? Molecular formula: C5H12O
The empirical formula for the given molecular formula C₅H₁₂O. As the molecular formula cannot be reduced into simplest ratio, therefore, the empirical formula and the molecular formula are the same.
What is the empirical formula?The empirical formula can be described as the simplest ratio of the number of different atoms present in a compound. The molecular formula of the compound can be described as the actual number of each different atom in a molecule. This formula is generally used and is also a multiple of the empirical formula of a compound.
The empirical formula provides the ratio of the number of atoms of a chemical in a given compound. The percentage composition directly gives the empirical formula of the compound.
The molecular formula can be reduced into the empirical formula of the compound by dividing the subscripts with a number that can provide the smallest ratio of the elements in the compound.
For the given molecular formula, the further simplest or most reduced ratio cannot be possible. Therefore, the empirical formula of the compound will be the same as the molecular formula. Therefore empirical formula of the compound is C₅H₁₂O.
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Which of the following observations would indicate that a material is a pure substance?
O It does not dissolve in water.
O It changes color after heating.
O It cannot be physically broken down into different types of atoms.
O It can be physically broken down into different types of molecules.
Answer:
C
Explanation:
Got it right on a test
Based on the electron configuration of the two
atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Magnesium 1s²2s²2p63s²
Sulfur 1s²2s²2p63s²3p4
A compound formed between Magnesium and Sulfur is MgS.
What is a cation?Cations are positively-charged ions (atoms or groups of atoms that have more protons than electrons due to having lost one or more electrons).
Magnesium, Mg, is located in period 3, group 2 of the periodic table, and has two electrons on its outermost shell.
On the other hand, sulfur, S, is located in period 3, group 16 of the periodic table, and has six electrons on its outermost shell.
Chemical reactivity is governed by an atom's "desire" to have a stable electron configuration and to have eight electrons in its outermost shell to complete an octet.
In this case, magnesium can complete its octet by giving up those two valence electrons, becoming the magnesium cation.
[tex]Mg^{2+}[/tex], in the process.
Sulfur, which only needs two electrons to complete its octet, will pick up the two electrons coming from magnesium, becoming the sulfide anion,
[tex]S^{2−}[/tex], in the process.
The electrostatic force of attraction will then bring the magnesium cations and the sulfur anions together to form an ionic bond.
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When you have added as much solute as can dissolve in solvent the solution is called
Solubility limit. that's the answer
What is the source of energy in nuclear power plants?
Answer:
URANIUMExplanation:
What is the source of energy in nuclear power plants?
Uranium is the fuel most widely used by nuclear plants for nuclear fission. Uranium is considered a nonrenewable energy source, even though it is a common metal found in rocks worldwide. Nuclear power plants use a certain kind of uranium, referred to as U-235, for fuel because its atoms are easily split apart.
Perform the following operation
and express the answer in
scientific notation.
2.36×10-2 8.4×10²
[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]
[tex]\qquad \tt \rightarrow \:2.8 × {10}^{-5}[/tex]
____________________________________
[tex] \large \tt Solution \: : [/tex]
[tex]\qquad \tt \rightarrow \: \dfrac{2.36 \times 10 {}^{ - 2} }{8.4 \times {10}^{2} } [/tex]
[tex]\qquad \tt \rightarrow \: \dfrac{2.36 }{8.4 } \times \cfrac{10 {}^{ - 2} }{10 {}^{2} } [/tex]
[tex]\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 2 - 2} [/tex]
[tex]\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 4} [/tex]
[tex]\qquad \tt \rightarrow \: 2.8 \times 10 {}^{ - 5} [/tex]
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Write the formula and calculate the molecular mass of
1) Soda ash
2) Baking Soda
3) Lime Stone
4) Ethanol
5) Common Salt
The molecular formula is the sum of the atomic masses of all atoms in the molecule.
The formula of Soda Ash:
Na₂CO₃ is also known as Sodium Carbonate.
The molecular mass of Soda Ash is
(2×Na)+(1×C)+(3×O)=106g/mol
The formula of Baking Soda:
NaHCO₃ is also known as Sodium bicarbonate.
The molecular mass of Baking Soda is
(1×Na)+(1×H)+(1×C)+(3×O)=84g/mol
The formula of Lime Stone:
CaCO₃ is also known as Calcium carbonate.
The molecular mass of Lime Stone:
(1×Ca)+(1×H)+(1×C)+(3×O)=100g/mol
The formula of Ethanol:
C₂H₅OH is the formula of ethanol.
The molecular mass of Ethanol:
(2×C)+(6×H)+(1×O)=46g/mol
The formula of Common Salt:
NaCl is also known as Sodium chloride.
The molecular mass of Common Salt:
(1×Na)+(1×Cl)=58.5g/mol
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Nitrogen monoxide (NO) is a pollutant known to
destroy the ozone layer. Nitrogen monoxide reacts
with ozone molecules (0,) to release oxygen and
a nitrogen-containing compound Q. Given that one
molecule of nitrogen monoxide reacts with one
molecule of ozone to produce one molecule of
of Q.
oxygen and one molecule of Q, identify the formula.
Answer:
See below
Explanation:
NO + O3 ====> NO2 + O2 (ozone is O3)
what is the approximate partial pressure of oxygen at 1500 m?
The approximate partial pressure of oxygen at 1500 m is 0.18 atm.
Pressure of the airFrom barometric pressure table;
1500 m = 85 kPa
1 kPa = 0.0099 atm
85 kPa = ?
= 0.84 atm
Oxygen percentage in air = 21%
Partial pressure of oxygen in air
P = 0.21 x P(total)
P = 0.21 x 0.84 atm
P = 0.18 atm
Thus, the approximate partial pressure of oxygen at 1500 m is 0.18 atm.
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What kind of exercise does not require the use of oxygen to metabolize energy? strength aerobic stretching anaerobic
Answer:
See Below
Explanation:
'an aerobic ' means it does not use oxygen
Answer:
anaerobic
Explanation:
