Can y’all help me with this
How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP??
PLEASE HELP
Answer:
8.8
Explanation:
You can view more details on each measurement unit: molecular weight of Aluminum or grams The molecular formula for Aluminum is Al. The SI base unit for the amount of substance is the mole. 1 mole is equal to 1 mole of Aluminum.
which of these solution is most basic
Answer:
There is nothing to answer lol
PLEASE HELP ASAP NO LINKS PLEASE
What is the force that keeps the planets in perfect orbit around the sun?
A) Velocity
B) Gravity
C) Centrifugal Force
D) Magnetism
Answer:
gravity
Explanation:
Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.
Hope this helped!!!
the charge of the atom is
Answer:
the charge of an atom is zero.
Explanation:
i hope this is what you were asking for.
The reason Senators are in office for 6 years is....(pick one of the following)
1) To separate Senators from the whims of the
general public.
2) to save money in elections
3) Because Senators are
required to be older
than representatives
A student lives in a place that receives lots of snow and ice during the winter. The student has observed that the highway department spreads salt on the road after a snowfall. Which of the following correctly explains why the highway department uses salt on the roads?
Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.
Salt raises the freezing point of water, which makes the melted snow on the road less likely to form ice.
Salt raises the vapor pressure of water, which makes the melted snow more likely to evaporate before it freezes.
Salt lowers the osmotic pressure of water, which makes the melted snow more likely to be absorbed into the ground before it freezes.
Answer:
Salt lowers the freezing point of water, which makes the melted snow on the road less likely to form ice.
Answer:
A
Explanation:
Edge.
According to the dichotomous key, organism 2 is a
A)
dragonfly nymph
B)
water scorpion
C)
bristle worm.
D)
water mite.
1) A 45.7 g sample of glass was brought to thermal equilibrium with boiling water and then transferred to 250.0 g of water that was at 22.5 °C. This combination reached thermal equilibrium at 24.2 °C. What is the specific heat capacity of glass?
2) What mass of silver at 100.0 °C, when added to 150.0 g of water at 21.0 °C, would raise the water’s temperature to 24.0 °C ?
3) The molar heat of fusion of H2O is 6.1 kJ/mole. What amount of energy would be needed to melt 376 g of ice at 0.0 °C?
1) A 45.7 g sample of glass was brought to thermal equilibrium with boiling water and then transferred to 250.0 g of water that was at 22.5 °C. This combination reached thermal equilibrium at 24.2 °C. What is the specific heat capacity of glass?
2) What mass of silver at 100.0 °C, when added to 150.0 g of water at 21.0 °C, would raise the water’s temperature to 24.0 °C ?
3) The molar heat of fusion of H2O is 6.1 kJ/mole. What amount of energy would be needed to melt 376 g of ice at 0.0 °C?
A compound found in the athletes urine had a percent composition of 80.8% carbon, 8.97% hydrogen and 10.3% oxygen. What is the Empirical formula of the compound? What is the molecular formula of the compound if the molar mass of the compound is 312g/mol?
Answer:
C21H2802
Explanation:
C=12g/mol
H=1g/mol
O=16g/mol
Part (C) of compound-80.18%
(0.8018 x 312)/12=21
Part (H) of compound-8.97%
(0.897 x 312)/1=28
Part (O) of compund-10.3%
(0.103 x 312)/16 = 2
Therefore the emp. formula is C12H28O2
A gas is collected at 30 Celsius and has a pressure of 200 kPa. What pressure would it exert if the temperature changed to 40 Celsius?
Answer:
[tex]206.6\ \text{kPa}[/tex]
Explanation:
[tex]P_1[/tex] = Initial pressure = 200 kPa
[tex]P_2[/tex] = Final pressure
[tex]T_1[/tex] = Initial temperature = [tex]30^{\circ}\text{C}[/tex]
[tex]T_2[/tex] = Final temperature = [tex]40^{\circ}\text{C}[/tex]
We have the relation
[tex]\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=\dfrac{T_2}{T_1}P_1\\\Rightarrow P_2=\dfrac{40+273.15}{30+273.15}\times 200\\\Rightarrow P_2=206.6\ \text{kPa}[/tex]
The pressure that would be exerted after the temperature change is [tex]206.6\ \text{kPa}[/tex].
What is the final temperature of a system if 10.0 grams of cold water, originally at 10°C is mixed with 120.0 grams of hot water, originally at 77.0°C?
A. 83.1°C
B. 100.0°C
C. 71.8 °C
D. 95.1°C
A 0.068 M solution of benzamide has a pOH of 2.91. What is the value of Kb for
this compound?
Answer:
Kb = 2.23 x 10⁻⁵
Explanation:
Benz-CO-NH₂ + H₂O => Benz-CO-NH₃⁺OH⁻ ⇄ Benz-CO-NH₃⁺ + OH⁻
given pOH = 2.91 => [OH⁻] = 10E-2.91 = 1.23 x 10⁻³M
Benz-CO-NH₃⁺OH⁻ ⇄ Benz-CO-NH₃⁺ + OH⁻
At Equilibrium 0.68M 1.23 x 10⁻³M 1.23 x 10⁻³M
Kb = [Benz-CO-NH₃⁺][OH⁻]/[ Benz-CO-NH₃⁺OH⁻]
= (1.23 x 10⁻³)² M²/ 0.068M = 2.23 x 10⁻⁵
Tides are the result of forces exerted on Earth's oceans, mostly by which celestial body?
The Sun
Jupiter
The Moon
Venus
Answer:
Explanation:
The moon
A student is shown a simple model of particles that make up a liquid, as shown
su
How should the model be changed to show the particles of a liquid at a higher temperature?
o
A. Separate the particles into positive and negative charges, and increase the space between the particles
B. Separate the particles into positive and negative charges, but maintain the same space between the particles
C Decrease the velocities of the particles, and decrease the space between the particles.
D. Increase the velocities of the particles, but maintain the same space between the particles.
Explanation is in a file
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A neutralization reaction occurs between sodium hydroxide and sulfurous acid. Complete the equation below for the neutralization reaction that ocurs during the titration
Answer:
2NaOH + H₂SO₃ → 2H₂O + Na₂SO₃
Explanation:
When a base as sodium hydroxide (NaOH) reacts with an acid as sulfurous acid (H₂SO₃), the H⁺ of the acid will produce with the OH⁻ of the base H₂O. Te complementary ions will produce the respective salt (Na₂SO₃):
NaOH + H₂SO₃ → H₂O + Na₂SO₃
To balance the sodiums:
2NaOH + H₂SO₃ → H₂O + Na₂SO₃
And the hydrogens:
2NaOH + H₂SO₃ → 2H₂O + Na₂SO₃And this is the complete reaction for this neutralization reaction.
=====answer this plss :(
Answer:
Geothermal energy is an uptrending alternative source of production that relies on the earth's crust and elements of radioactivity.
Increase GDP expansion: Philippines could expand their production and hence their industrialization efforts to create a more economies of scales factoring.Produce a cleaner environment: With a cleaner environment with regards to pollution then the citizens can live at a lower mortality rate.Anyone know the answer to this?
I need helpppp plsss
Answer: Blank 1: 6
Blank 2: 1
Blank 3: 7
Explanation:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation. Explanation: 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.
The balanced chemical equation will be:
[tex]6H_3BO_3\rightarrow H_4B_6O_{11}+7H_2O[/tex]
A full moon appears on July 1: On what date is the next full moon likely to appear in the night sky?
А July 15
B July 29
C August 14
D August 28
A full Moon chances roughly every 29.5 days, so it may be possible the next full moon likely to appear in the night sky of Earth on July 29, hence the option B is correct.
The lunar phase during which the Moon is completely lit from Earth's viewpoint 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 round disc.
A full Moon chances roughly every 29.5 days, so it may be possible the next full moon likely to appear in the night sky on July 29.
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which elements are out of order in terms of atomic mass. co,Ni or Li,be or I,xe
Answer:
The pair co,Ni is out of order in terms of atomic mass
Explanation:
For co,Ni
Atomic mass of Co = 58.9331 u
Atomic mass of Ni = 58.6934
For Li,be
Atomic mass of Li = 6.941 u
Atomic mass of be = 9.012182 u
For I,xe
Atomic mass of I = 126.90447 u
Atomic mass of Xe = 131.293 u
Hence, the pair co,Ni is out of order in terms of atomic mass
Please answer the question
Answer: c
Explanation:
WILL MARK BRAINLIEST
Answer:
B) inertia
Explanation:
Sorry if wrong
A box slides with an initial speed of 4.0 towards a spring on a frictionless horizontal surface. When the box
S
N
hits a spring with spring constant k = 150 the spring compresses by 0.30 m.
m
m
M
What is the mass of the box?
Answer: .84kg
Explanation:
Khan academy
A box slides with an initial speed of 4.0 kg m/s towards a spring on a frictionless horizontal surface. When the box hits a spring with spring constant k = 150 N/m, the spring compresses by 0.30 m.
What is the mass of the box?
Answer: 0.54 kg
Question of the day
Seeds obtain their energy (food) directly from the soil as soon as they are planted.
True or False?
Answer:
false
Explanation:
it gets nourishment from the storage tissues in the seeds, when it develops into a young plant with roots, then it takes nutrients from the soil
the movement of carbon between the atmosphere, land, and ocean is called what?
A pool float was filled with air to capacity in the middle of a hot day. The next morning the pool float looked different yet no gas escaped or entered the float. Describe what you think the float looked like in the morning and why it occurred.
Answer:
The pool float looked would have looked deflated the next morning.
Explanation:
When temperature decreases the volume decreases
Answer:
The pool float most likely looked a little deflated or pushed in
Explanation:
The pool float most likely looked a little deflated or pushed in. This is because during the night temperatures most likely dropped. These cold temperatures during the night would have caused the air molecules inside the pool float to come closer together which would cause there to be more excess space inside the pool float. Therefore, allowing it to collapse into itself. This would be far worse if the float was filled with helium or another gas other than O2.
what is the similar of snow and sleet pls help me
Answer:
Explanation: Snow forms in clouds at temperatures below freezing. As snow falls through the atmosphere, the air remains at least 32° F or colder. ... It then re-enters another pocket of cold air before reaching the surface. The snowflake refreezes and becomes an ice pellet we call sleet.
How many atoms are in 1.00 moles of Calcium (Ca)?
Answer:
One mole is equal to 6.02214179×1023 atoms, or other elementary units such as molecules.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore number of atoms in 1.00 moles of Calcium (Ca) are 6.022×10²³ atoms.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. Mole is inversely proportional to molar mass.
Mathematically,
mole =given mass ÷ molar mass
Number of atoms = moles ×6.022×10²³ atoms
Substituting the values in above formula we get
Number of atoms = 1 ×6.022×10²³ atoms
Number of atoms 1 mole of calcium = 6.022×10²³ atoms
Therefore, number of atoms in 1.00 moles of Calcium (Ca) are 6.022×10²³ atoms.
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What happens to iron in a bolt as the bolt rusts?
Iron gets converted from Fe2+ to Fe3+ during rusting. Details about rusting can be found below.
What is rusting?Rusting is the deteriorated state of iron or steel as a result of moisture and oxidation.
Rusting is characterized by a reddish-brown color on the surface of the iron.
Rusting is caused by oxidation of iron II (Fe2+) ion into iron III (Fe3+) ion.
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