Answer:
BaS would be a stable neutral molecule!
Reason:- All of the above.
Explanation:
In order to form a neutral molecule it's necessary to balance their charge first, The given components i.e. Ba2+(cation) and S2-(anion) have equal and opposite charges, when they combine they form predominantly ionic compound i.e. Sulphur partly shares it's 2 electrons with Barium and forms Barium sulphide.
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Can someone explain the second marking point?
Why is it bubbles of air and not C02?
Determine the pressure in atm exerted by 1 mole of methane placed into a bulb with a volume of 244.6 mL at 25°C. Carry out two calculations: in the first calculation, assume that methane behaves as an ideal gas; in the second calculation, assume that methane behaves as a real gas and obeys the van der Waals equation
The pressure in atm exerted by 1 mole of methane placed into a bulb with a volume of 244.6 mL at 25°C is 101.94atm.
How to calculate pressure?The pressure of an ideal gas can be calculated using the following formula:
PV = nRT
Where;
P = pressure V = volumen = number of molesR = gas law constantT = temperatureAccording to information in this question;
T = 25°C = 25 + 273 = 298KV = 244.6mL = 0.24LR = 0.0821 Latm/KmolP × 0.24 = 1 × 0.0821 × 298
0.24P = 24.47
P = 24.47/0.24
P = 101.94atm
Therefore, the pressure in atm exerted by 1 mole of methane placed into a bulb with a volume of 244.6 mL at 25°C is 101.94atm.
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What are the extensive and intensive properties described in this experiment? Which properties would change and which would stay the same if you ran the experiment sing 7.5-ounce cans instead of 12- ounce cans?
Intensive properties do not change as the size of an object changes but Extensive properties change as the size of an object changes; here the properties can not change because the amount of the water stays the same
What are the difference between Extensive property and Intensive Property ?The physical properties of matter can be divided into intensive and extensive properties and the terms are introduced in 1917 by Richard C Tolman.
Intensive properties are independent of the presence of number of substance and they are bulk properties, here the Characteristic doesn’t change.
The size of intensive properties cannot change, examples are Density, temperature, pressure etc. It can not depend on the amount of matter and also intensive properties are fixed, countable.
Extensive properties are dependent on the presence of number of substance, easily identified, Size of Extensive properties changes and It can be computed.
extensive properties depend on the amount of matter, often changes and are not countable; For example Volume, size, mass, length, weight
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What is the definition of specific heat?
A. The heat needed to raise the temperature of 1 g of a substance
1°C
B. The temperature change between the melting and boiling points of
a substance
C. The heat required to break the molecular bonds within a
substance
OD. The total amount of energy contained within 1 mole of a
substance
SUBMIT
Answer:
A: The heat needed to raise the temperature of 1 g of a substance1°C
Explanation:
Specific heat is the temperature required to raise the temperature of the unit mass of a given substance. With that being said, of all options A: protrays the definition perfectly.
Side Note: I hope this helps feel free to let me know if you have any other questions.
2AI(NO3)3 + 3Na2CO3 → Al2(CO3)3(s) + 6NaNO3
What is the ratio of moles of AI(NO3)3 to moles Na2CO3?
The ratio of moles of AI(NO3)3 to moles Na2CO3 in the reaction is 2:3
In the reaction 2 moles of AI(NO3)3 reacted with 3 moles Na2CO3 so the ratio of the moles is 2 is to 3 represented as 2:3
hope it helps
2. Calculate and express the following in the correct units with the correct number of
significant figures
(a) 7.310 km + 5.70 km
(b)(3.26 x 10^-3mg)-(7.88 x 10^-5 mg)
(c) (4.02 x 10^6dm) + (7.74 x 10^7dm)
(d) (7.8 m - 0.34 m) + (1.15 s +0.82 s)
Answer:
Socratic app
Explanation:
it will help you
Bonding with intermolecular forces:
1.) is CH3F a hydrogen bonding? yes or no?
2.) is CH3F dipole-dipole interactions? Yes or no?
3.) is CH3F a london dispersion forces? Yes or no?
Explanation:
1.) is CH3F a hydrogen bonding? yes or no? = No, CH3F is not a hydrogen bonding beacuse the molecule lacks hydrogen atoms bonded to nitrogen, oxygen, or fluorine; ruling out hydrogen bonding.2.) is CH3F dipole-dipole interactions? Yes or no? = Yes, CH3F is a dipole-dipole interactions beacuse in it's molecule, there are no metal atoms to form ionic bonds3.) is CH3F a london dispersion forces? Yes or no?= Yes, CH3F is a london dispersion forces because in it's molecule, there are no metal atoms to form ionic bonds .The intermolecular forces present in the bonding of CH₃F are dipole-dipole interactions and London dispersion forces.
1.) No, CH₃F does not exhibit hydrogen bonding. Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom such as fluorine, oxygen, or nitrogen. In CH₃F, the hydrogen atom is bonded to carbon, which is not highly electronegative.
2.) Yes, CH₃F exhibits dipole-dipole interactions. Dipole-dipole interactions occur between molecules that have permanent dipoles due to the electronegativity difference between the atoms. In CH₃F, the fluorine atom is more electronegative than the carbon and hydrogen atoms, resulting in a polar molecule with a permanent dipole moment.
3.) Yes, CH₃F exhibits London dispersion forces. London's dispersion forces, also known as Van der Waals forces, are present in all molecules and arise from temporary fluctuations in electron distribution. Although CH₃F has dipole-dipole interactions, it also experiences London dispersion forces due to the temporary shifts in electron density.
Hence, the bonding in CH₃F was explained above.
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The motion of gas particles is described by straight line motion, followed by a collision and a change in direction. This is know as
Answer:
It is called the Random Walk, where the next move (as seen through the motion of gas particles) depends on chance.
Explanation:
Which of the following UV rays has the highest energy that damages your skin the most?
A. UVA
B. UVB
C. X-ray
D. Infrared (IR)
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When salt is added to water, what happens to the molecules?
The water molecules remain together. The salt molecules break apart.
Water and salt molecules remain together.
The water molecules break apart. The salt molecules remain together.
Water and salt molecules break apart.
Answer:
The the salt dissolves
Explanation:
The salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.
2. Which substance has definite volume and weight, but not a definite
shape?
B
A. ice
wood
C. gasoline
D. steam
Answer:
A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape. The change from solid to liquid usually does not significantly change the volume of a substance
Explanation:
no explanation
Which of the following is not a reason the nitrogen cycle is important to life on Earth?
a.
All living things need nitrogen to make proteins.
b.
Nitrogen is radioactive if it doesn’t go through the cycle.
c.
Organisms cannot use nitrogen directly.
d.
All living things need nitrogen to make DNA.
Answer:
b
Explanation:
A) Which statement best summarizes the way the sun produces energy? (1 point)
Combustion reactions in the sun release large amounts of chemical energy.
Fusion reactions in the sun release large amounts of chemical energy.
Combustion reactions in the sun convert small amounts of matter into large amounts of energy.
Fusion reactions in the sun convert small amounts of matter into large amounts of energy.
Answer:
1. The combined number of protons and neutrons remains constant.
2. There are two atoms with mass numbers of 2.
3. It is the number of protons plus neutrons.
4. A nucleus with a greater mass than any of the reactants will be produced.
5. Fusion reactions in the sun convert small amounts of matter into large amounts of energy.
Explanation: I couldn't see the comments so I guess some ppl can't either but here you go got them all correct! :)
Th sun produces energy through fusion reaction by converting small amount of matter into larger amounts of energy.
Nuclear fusion in the sunThe sun is able to produce energy because protons of hydrogen atoms present in the sun collide violently in the sun's core and fuse together leading to the formation helium atom.
This process of fussion is referred to as a PP (proton-proton) chain reaction, and it emits an enormous amount of energy
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HCl(?) + H2O(?) → H3O+(?) + Cl-(?)
What is the phase label on Cl-?
Answer:
H30,+ion is known as Hydroniom Ion
Explanation:
brain ly ----
everyday
brainless this answer is correct
10) What volume of oxygen at STP must react with 5.8 L of hydrogen to form water?
(Hint: write and balance the reaction first)
The answer is 2.9L (I NEED THE STEPS)
2.9 L of oxygen are required to react with 5.8 L of hydrogen at STP to form water.
What is the balanced equation of the formation of water?Hydrogen gas and oxygen gas combines in a molar volume ratio of 2 : 1 to form water.
The equation of the reaction is given as follows:
2 H2O + O2 ----> 2 H2OThus, twice the volume of hydrogen is required with a given volume of oxygen to form water.
If 5.8 L of hydrogen is available for reaction at STP, the volume of oxygen required all be half of 5.8 L.
Volume of oxygen required = 5.8 / 2 = 2.9 L
Therefore, 2.9 L of oxygen are required to react with 5.8 L of hydrogen at STP to form water.
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what is hydrogen alkali metal or halogen
Answer:
Hydrogen is neither an alkali metal or halogen.
Explanation:
It has the properties of both groups and so it's position is uncertain.
Which of the following is not an example of a modified silicate?
Ceramics
Glass
Cement
Quartz
Quartz is not regarded as an example of a modified silicate.
What is Quartz?This is defined as a hard, crystalline mineral composed of silica with a tetrahedral shape. Silica is also referred to as Silicon dioxide(SiO₂).
This type of mineral is a naturally occurring crystal and isn't a modified silicate but the rest can be modified using their respective constituents thereby making option D the most appropriate choice.
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What is the formula for calculating pH?
O A. pOH= [H*]
————
[OH -]
B. pH = -log[OH-]
C. pH = -log[H+]
D. pH = log[ht]
Answer:
c. pH=-log[H+]
Explanation:
pH=-log10[H+]
if you observe a first quarter on January 3 on what date will you see a full moon?
if you observe a first quarter on January 3, the date will you see a full moon is on February 1st.
What is the full moon about?The lunar phase during which the Moon is completely illuminated from Earth's perspective is known as the full moon. When Earth is situated halfway between the Sun and the Moon, this happens. This indicates that the near side of the moon, which faces Earth, is fully illuminated by the sun and appears as a roughly circular disk.
The Moon is a symbol for both the emotional and physical bodies. The full Moon is a time to be open and receive the spirit's light and awareness into your physical, emotional, and mental bodies
It takes 29 day, to get to the full moon. This will be:
= January 3 + 29 days
= February 1st
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6.
Which of the following is NOT an example of a chemical change?
A. burning wood
B. the production of simple sugars through photosynthesis
C. fermentation of sugars into alcohol
D. grinding wood into sawdust
Answer:
D
Explanation:
NEED HELP ASAP!!! As atmospheric carbon dioxide increases, the amount of carbon dioxide dissolved in the ocean _____.
Question 1 options:
increases
decreases
stays the same
Answer:
If temperature stays the same, the amount of carbon dioxide dissolved in the ocean would increase.
Explanation:
The carbon dioxide in the air ([tex]{\rm CO_{2}}\, (g)[/tex]) and the carbon dioxide dissolved in the ocean ([tex]{\rm CO_{2}}\, (aq)[/tex]) are in a solution equilibrium:
[tex]{\rm CO_{2}}\, (g) \rightleftharpoons {\rm CO_{2}}\, (aq)[/tex].
Assume that the concentration of carbon dioxide in the air ([tex]{\rm CO_{2}}\, (g)[/tex]) increased while temperature stayed the same.
By Le Ch[tex]^{}[/tex]atelier's Principle, the solution equilibrium [tex]{\rm CO_{2}}\, (g) \rightleftharpoons {\rm CO_{2}}\, (aq)[/tex] would shift to offset this increase in [tex]{\rm CO_{2}}\, (g)[/tex] concentration. Specifically, this equilibrium would reduce the amont of [tex]{\rm CO_{2}}\, (g)\![/tex] in the system by converting more atmospheric [tex]{\rm CO_{2}}\, (g)\!\![/tex] to [tex]{\rm CO_{2}}\, (aq)\![/tex] dissolved in the ocean. Therefore, the concentration of [tex]{\rm CO_{2}}\, (aq)\!\![/tex] dissolved in the ocean would increase.
Determine the type of reaction: AgNO3 + Cu --> Cu(NO3)2 + Ag
a. Double displacement
b. single displacement
c. Decomposition
d. Synthesis
Answer:
b. single displacement
why is accurate body measurement important in dressmaking
Answer:
Without taking body measurements, the fabric material can run out of supply if the tailor uses it too much. And more material is required to fix small dresses or suits. So when body measurements are taken accurately, the tailor will know the exact amount of material to be used.
Explanation:
Calculate the freezing point and boiling point of each aqueous solution, assuming complete dissociation of the solute.
a. 0.100 m K2S
b. 21.5 g of CuCl2 in 4.50 * 102 g water
c. 5.5% NaNO3 by mass (in water)
The freezing points of each of the solutions are as follows;
0.100 m K2S - - 0.558oC
21.5 g of CuCl2 in 4.50 * 102 g water - -2oC
5.5% NaNO3 by mass (in water) - - 2.6oC
What is freezing point?The freezing point is the point at which liquid changes to solid. Let us now look at the freezing point of each solution.
a)
Since;
ΔT = K m i
K = 1.86 oC m-1
m = 0.100 m
i = 3
ΔT = 1.86 oC m-1 * 0.100 m * 3 = 0.558oC
Freezing point = 0oC - 0.558oC = - 0.558oC
b) Number of moles of CuCl2 = 21.5 g/134.45 g/mol = 0.16 moles
molality = 0.16 moles/0.45 Kg = 0.36 m
ΔT = K m i
ΔT = 1.86 oC m-1 * 0.36 m * 3 = 2oC
Freezing point = 0oC - 2 = -2oC
c) Number of moles of NaNO3 = 5.5g/85 g/mol = 0.065 moles
molality of the solution = 0.065 moles/0.0945 Kg = 0.69 m
ΔT = 1.86 oC m-1 * 0.69 m * 2 = 2.6oC
Freezing point = 0oC - 2.6oC = - 2.6oC
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A sample of neon gas has a volume of 5.0 mL at a pressure of 1.50 atm. What is the pressure exerted by the gas if the volume is increased to 10.0 mL, at constant temperature?
A. 1.5 atm
B. 9.0 atm
C. 0.25 atm
D. 7.5 atm
E. 0.75 atm
Answer:
p2 = .75 atm
Explanation:
p1 v1 = p2 v2
5 * 1.5 = p2 10
Identify the combustion reaction.
C4H12 + 7O2 ⟶ 6H2O + 4CO2
2H2 + O2 ⟶ 2H2O
Al2S3 ⟶ 2Al + 3S
Cl2 + 2KBr ⟶ 2KCl + Br2
Answer:
2kci,3H12,702,c02g k 4 t v6vuvi
12.Put this equation into word form.
Rb + P + Rb3P
rubidium and phosphorus react to form rubidium phosphide
rubidium and potassium react to form rubidium potasside
rubidium plus potassium forms rubidium potasside
rubidium combined with potassium forms rubidium phosphide
Answer:
A. Rubidium and phosphorus react to form rubidium phosphide
Explanation:
P is not potassuim. It is phosporous. So A is the only correct choice.
Write a net ionic equation for the reaction that occurs when magnesium carbonate (s) and excess hydrochloric acid (aq) are combined.
Answer:
2HBr(aq) + MgS(s) → MgBr2(aq) + H2S(g)
excess
Sulfide ion in solution exists as HS-. Adding additional H+ forces it to H2S gas.
H2S(g) <=> H+(aq) + HS-(aq)
A complete ionic equation also contains the spectator ions, whereas a net ionic equation just displays the chemical species that are involved in a reaction. when MgCO₃ (s) and excess HCl (aq) are combined, the equation becomes MgCO₃ (s) + 2H⁺ (aq) → Mg²⁺ (aq) + H₂O (l) + CO₂ (g).
The chemical species that change chemically are identified by the net ionic equation. The ions that show up on both sides of the equation are stable and are therefore referred to be spectator ions.
Spectator ions are ions that are present on both sides of chemical reactions but do not take part in the reaction itself. The spectator ions on both sides of the equation are canceled in the net chemical reaction.
The complete ionic equation is:
MgCO₃ (s) + 2H⁺ (aq) + 2Cl⁻ (aq) → Mg²⁺ (aq) + 2Cl⁻ (aq) + H₂O (l) + CO₂ (g)
The net ionic equation is:
MgCO₃ (s) + 2H⁺ (aq) → Mg²⁺ (aq) + H₂O (l) + CO₂ (g)
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Determine the hybridization about O in CH3oh
Answer:
c
Explanation:
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