Answer:
Aluminum Metal
Explanation:
A P E X states that it is Aluminum Metal 100% right
When a car burns gas most of the energy is lost as heat. This inefficiency of energy transfer is an example of which law of energy?
A. second
B. fourth
C. first
D. third
Answer:
C) first
Explanation:
Hello there please help this is for science and if you answer thanks for the help you earned yourself a 5 star.
Answer:
Ice cubes, glass of tea, and butter
Explanation:
Like it said in the hint, the molecules will only speed up if they gain heat. This means in order for the object to heat up it will have to have a temperature that is less than the temperature in the room. Ice cubes, glass of tea, and butter are the three objects that have a temperature less than 72 degrees so when they are placed in the 72 degrees room they will heat gain heat (therefore making the molecules move faster)
1. What volume would be occupied by 2.0 mol nitrogen, N2, gas at 0°C and 1 atm? Volume
Answer:
V = 44.83 L
Explanation:
Given data:
Volume of nitrogen gas = ?
Number of moles = 2.0 mol
Temperature = 0°C
Pressure = 1atm
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
0+273 = 273 K
1 atm× V = 2.0 mol × 0.0821 atm.L/mol.K × 273K
1 atm× V = 44.83 atm.L
V = 44.83 atm.L / 1 atm
V = 44.83 L
Which is not true of the ideal gas law?
-For a given amount of gas held at constant temperature, the product of pressure and
volume is constant.
-It describes the behavior of an ideal gas in terms of the pressure, volume,
temperature, and number of moles of gas present.
-None of the above.
-The value of R is 0.082.1 L.atm/mol.K.
Answer:
For a given amount of gas held at constant temperature, the product of pressure and
volume is constant.
:
Clay and Pumice have pores but the pores are not well connected. If you poured water over either of them it would just run off the surface. It wouldn't run through. But they could hold water in their pores. We can say then that both or them ARE ___________________ but NOT __________________________________.
Answer:
Clay and Pumice can both be said to be Porous but they are not Permeable
Explanation:
A porous substance is one which have pores in in through which air or liquid can pass through. Both clay and pumice are porous due to the presence of pores in them. These pores allow air to pass through them. However, since the pores are not well connected water do no pass through them. As a result, clay vessels can hold water within them and pumice floats on water.
Permeability is the ability of a substance to allow other substances to pass through. Both clay and pumice have low permeability, as a result they do not allow water to pass through them. Rather, water runs over their surface when poured over them.
Answer:
Clay and Pumice can both be said to be Porous but they are not Permeable
Explanation:
How many grams are there in a 14.5 moles lithium permanganate
There are 1825.6 g in a 14.5 moles Lithium permanganate
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass :
[tex]\tt mol=\dfrac{mass}{MW}[/tex]
moles of Lithium permanganate = 14.5
Lithium permanganate (LiMnO4) MW=125.9 g/mol, so mass :
[tex]\tt mass=mol\times MW\\\\mass=14.5\times 125.9~g/mol\\\\mass=1825.6~g[/tex]
Which term means that a metal can be made into wire?
A)
Luster
B)
Ductility
Malleability
D)
Conductivity
Answer:
c
Explanation:
i think
limitation of hydrogen displacement method
Answer:
Limitation of hydrogen displacement method is described below in detailed explanation.
Explanation:
This approach is beneficial for elements that can displace hydrogen from psychedelics or can consolidate with hydrogen. A single replacement effect, sometimes described as a single displacement reaction, is a reflection in which one component is replaced for a different component in a compound. The origin elements are forever pure elements, such as a clear zinc metal or hydrogen propellant, plus an aqueous compound.
The formation of an ionic compound involves the transfer of electrons. The removal of one or more electrons from a metal is a process that _____ energy, whereas the addition of one or more electrons to a nonmetal _____ energy.
Answer:
Absorbs, Releases
Explanation:
The formation of an ionic compound involves the transfer of electrons. The removal of one or more electrons from a metal is a process that absorbs energy, whereas the addition of one or more electrons to a nonmetal releases energy.
Answer:
Absorbs
Release
Explanation:
The formation of ionic compounds occurs between two kinds of atoms having a large electronegativity difference (Δx ≥ 0.7) e.g metals (like those in group IA and IIA) and non-metals(like those in groups VIA and VIIA). The formation of an ionic bond involves the transfer of electron(s) from the less electronegative atom (metal) to the more electronegative atom (non-metal) such that the two kinds of atoms now have a completely filled outer shell like the noble gas.
What is a net ionic equation?
A. An equation that is balan
B. An equation that shows a
Answer:
Explanation:
An equation showing only what is involved in the reaction.
a o e x
point Deshawn ran the 400 m race(in a straight line) in 2 minutes. What is his distance and displacement ? Explain your answer below in complete sentences.
His distance and displacement are the same, which was 400 m
Further explanationGiven
Distance = 400 m
time = 2 min
Required
Distance and displacement
Solution
Distance is a scalar quantity that indicates the length of the trajectory that is traveled by an object within a certain interval. Distance has no direction, only has magnitude
Can be simplified distance = totals traveled
Displacement is a vector quantity that shows changes in the position of objects in a certain interval of time. Displacement has magnitude and direction
Can be simplified displacement = distanced traveled from starting point to ending point
From the definition above shows that the displacement and the distance that he traveled have the same value (magnitude), which is equal to 400 m
The value of the two will be different if he starts and finishes at the same point, then the displacement value is zero while the distance he has traveled is still 0
Which of the following double-replacement reactions will occur?
NaBr(aq) + AgNO3(aq) →
NaBr(aq) + Ca(NO3)2(aq) →
NaBr(aq) + Al(NO3)2(aq) →
NaBr(aq) + KNO3(aq) →
NaBr(aq) + AgNO3(aq) →NaNO3(aq) + AgBr(s)⇒ double-replacement reactions will occur
Further explanationDouble-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
A double replacement reaction will occur if one or both of the products is an insoluble precipitate, a liquid, or a gas
To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur
Solubility Rules:
• 1. soluble compound
All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +
All compounds of NO₃⁻ and C₂H₃O₂⁻
Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺
Compounds of SO₄²⁻ except Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺
• 2. insoluble compounds
Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +
Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺ , Sr²⁺, and Ba²⁺
NaBr(aq) + AgNO3(aq) →NaNO3(aq) + AgBr(s)⇒ occur
NaBr(aq) + Ca(NO3)2(aq) → NaNO3(aq) + CaBr₂(aq)⇒not occur
NaBr(aq) + Al(NO3)3(aq) →NaNO3(aq) + AlBr3(aq)⇒not occur
NaBr(aq) + KNO3(aq) →NaNO3(aq) + KBr(aq)⇒not occur
Which of the following elements is most reactive.
A Chlorine
B Bromine
C Fluorine
D Helium
Answer:
c.
Fluorine
Explanation:
Calculate the total pressure in a mixture of 8 g of dioxygen and 4 g of dihydrogen confined in a vessel of 1 dm8 at 27 ∘C. (R = 0.083 bar dm8 K−1 mol−1
Answer:
Total pressure = 56.77 bar
Explanation:
Given data:
Mass of dioxygen = 8 g
Mass of dihydrogen = 4 g
Volume of vessel = 1 dm³
Temperature = 27°C (27+273 = 300 K)
R = 0.083 bar.dm³ / mol.K
Total pressure = ?
Solution:
Number of moles of dioxygen:
Number of moles = mass/molar mass
Number of moles = 8 g/ 32 g/mol
Number of moles = 0.25 mol
Pressure of dioxygen:
PV = nRT
P = nRT/V
P = 0.25 mol × 0.083 bar.dm³ / mol.K × 300 K / 1 dm³
P = 6.97 bar.dm³ /1 dm³
P = 6.97 bar
Number of moles of dihydrogen:
Number of moles = mass/molar mass
Number of moles = 4 g/ 2 g/mol
Number of moles = 2 mol
Pressure of dihydrogen:
PV = nRT
P = nRT/V
P = 2 mol × 0.083 bar.dm³ / mol.K × 300 K / 1 dm³
P = 49.8 bar.dm³ /1 dm³
P = 49.8 bar
Total pressure of mixture in a vessel:
Total pressure = P (O₂) + P(H₂)
Total pressure = 6.97 bar + 49.8 bar
Total pressure = 56.77 bar
Examine the chemical reaction.
C3H8+—>4H2O+3CO2
What coefficient of Oz should be added so the number
of atoms of oxygen is conserved on both sides of the
reaction equation?
i don’t know if this is chemistry
Answer:
5
Explanation:
If you have 2 of the same substance and they are at the same temperature but have a different amount, what changes?
Answer:
The heat energy stored within them changes
Explanation:
Heat energy is a function of the mass of a body, its specific heat capacity, and its temperature.
In this case, the bodies have the same specific heat capacity since they are made from the same material and the same temperature.
To get the quantity of heat stored in a body, we need to multiply all three parameters as shown below
[tex]Q = mC \Delta T[/tex]
An increase in mass, through an increase in the amount of substance of a material present, will cause a corresponding increase in the heat energy stored within the material
Almost all of Earth's atmosphere is created through the process of photosynthesis.
True
False
Answer:
ture
Explanation:
trees, plants is what keeps us alive
Characteristics of the water at the mountain source: Speed: Temperature Oxygen Level Nutrient Level
Describe the characteristics of the water at the mountain source:
Answer:
The answer is below
Explanation:
Speed: there will be faster speed due to the steep slope movement of water from the mountain.
Temperature: there will be lower temperatures as a result of the faster speed of water movement which reduces the influence of solar radiation on it.
Oxygen: the oxygen content is higher due to little or no residue particles present in it.
Nutrient Level: this is considered somewhat low as a result of the water coldness and speed which does not support the nutrition base to form.
group viia elements are very active non metals give reason
Answer:
because they need only one electron
CAN SOMEONE HELP ME ON THIS!!! THIS IS VERY URGENT
Answer:
Explanation:
3: Given data:
Number of moles of strontium nitrate = 3.00×10⁻³ mol
Number of atoms = ?
Solution:
There are 9 moles of atoms in 1 mole of Sr(NO₃)₂.
In 3.00×10⁻³ moles,
9 mol × 3.00×10⁻³
27.00×10⁻³ mol
Number of atoms in 3.00×10⁻³ mol of Sr(NO₃)₂:
27.00×10⁻³ mol × 6.022×10²³ atoms / 1mol
162.59×10²⁰ atoms
4)Given data:
Mass of calcium hydroxide = 4500 Kg (4500/1000 = 4.5 g)
Number of moles = ?
Solution:
Number of moles = mass in g/molar mass
by putting values,
Number of moles = 4.5 g/ 74.1 g/mol
Number of moles = 0.06 mol
5) Given data:
Number of atoms of silver nitrate = 1.06×10²³
Number of moles = ?
Solution:
1 mole of any substance contain 6.022×10²³ atoms .
1.06×10²³ atoms × 1 mol / 6.022×10²³ atoms
0.176 moles of silver nitrate
HELP!!!
find the balanced equation
Answer:
3Fe²⁺ + Cl₂ ⇒ 2Fe³⁺ + 2Cl⁻
Explanation:
manipulate the problem to match charges and have the same amount of reactants and products on both sides.
Help ASSSAPPPP I WILL MARK BRAINLIEST. What is the outer electron configuration for tin?
Answer:
hope this helps!
the characterstic part of a molecule that determines its chemical properties is known as
Answer: The atomic number indicates the number of protons within the core of an atom. The atomic number is an important concept of chemistry and quantum mechanics. An element and its place within the periodic table are derived from this concept. ... These electrons mainly determine the chemical behaviour of an atom. The chemical properties of an element, are determined by the number of protons in the nucleus. This number of protons is called the atomic number. The mass of the atom, its atomic mass, depends upon the sum of the number of protons and the number of neutrons present in the nucleus.
Hope this helps....... Stay safe and have a Merry Christmas!!!!!!! :D
Explanation:
Outer Electrons/Valence Electrons determine the chemical properties....Or Somehow we can say in organic compounds, functional group determine mostly chemical properties...
MARKING BRAINLIEST! AND 16 POINTS
Plants use energy from sunlight, water, and carbon dioxide to produce sugar. What structure is found only in plant cells and helps plants capture energy from sunlight?
Answer:
Chloroplast.
Explanation:
Answer:
chlorophat
Explanation:
28. Which of the following statements is TRUE about acids and bases
A. Acids and bases do not react with each other
B Acids mixed with bases neutralize each other
C Acids mixed with bases make stronger bases
D. Acids mixed with bases make stronger acids
hont to flow called?
Answer:
B. Acid mixed with bases neutralize each other
Answer:
Hey buddy, here is your answer. Hope it helps you.
Explanation:
B- Acids mixed with bases neutralize each other. Acid + base ——-> salt+water solution. Mixing these two will make them neutralize .
Why doesn’t the nucleus fly apart?
A strong force - called the strong nuclear force - holds protons and neutrons together in the nucleus.
Imagine that you have an ideal gas in a 4.30 L container, and that 1250 molecules of this gas collide with a square-inch area of the container at any given instant. If the volume is increased to 21.5 L at constant temperature, how many collisions will occur per square inch of this larger container
Answer:
250 collisions per square inch
Explanation:
According to Boyle's law, at constant temperatures, the pressure exerted by gas molecules is inversely proportional to the volume of the gas. Hence;
P1V1 = P2V2 where P1 = initial pressure, V1 = initial volume, P2 = final pressure, and V2 = final volume
In this case, the collision that occurred is taken as the pressure.
P1 = 1250, V1 = 4.30 , V2 = 21.5 P2 = ?
P2 = P1V1/V2
= 1250 x 4.30/21.5
= 250
Hence, at a constant temperature, 250 collisions per square inch of the larger container will occur.
How many moles of CO2 can form from 5.1 moles of C3H8 and abundant O2 in the equation:
C3H8 + 5O2 -> 3CO2 + 4H2O
Answer:
15.3 moles of CO₂ formed.
Explanation:
Given data:
Number of moles of CO₂ formed = ?
Number of moles of C₃H₈ react = 5.1 mol
Solution:
Chemical equation:
C₃H₈ + 5O₂ → 3CO₂ + H₂O
Now we will compare the moles of CO₂ with C₃H₈.
C₃H₈ : CO₂
1 : 3
5.1 : 3/1×5.1 = 15.3 mol
Name 3 types of rock on Planet Earth.
Answer:
igneous, sedimentary, and metamorphic
Explanation:
Answer:
IGNEOUS ROCKS form when molten rock (magma or lava) cools and solidifies. SEDIMENTARY ROCKS originate when particles settle out of water or air, or by precipitation of minerals from water.
And METAMORPHIC (I dont have nothing for this won)
Explanation:
Which two statements are true about redox reactions?
A. They include both oxidation and reduction reactions,
B. Electrons are transferred.
C. They are double-replacement reactions.
D. They are acid-base reactions,
Answer:
A. They include both oxidation and reduction reactions AND B. Electrons are transferred.
Explanation:
a p e x
The statements that are true about redox reaction are:
A. They include both oxidation and reduction reactions,
B. Electrons are transferred.
What is a redox reaction?The Redox reaction is the one in which oxidation and reduction take place simultaneously. In this process transfer of electrons takes place which further leads to oxidation or reduction.
Thus, options A and B are correct.
Find more information about Redox reaction here:
brainly.com/question/21851295