Explanation:
Sodium Chloride is neutral whereas hydrochloric acid is an acid. 2. Sodium Chloride is solid while hyrdochloric acid is a gas.
What is a subcript? Give an example.
Answer:
subscript is a character
Explanation:
A subscript is a character (such as a number or letter) that is set slightly below or above the normal line of type, respectively. It is usually smaller than the rest of the text.
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O How many moles of oxygen gas (O2) are needed to create EXACTLY 6 moles of Carbon dioxide(CO2)?.
25 ml of 2.4 M K2(CO3) is mixed with 35 ml of 2.0 M Al(NO3)3. (a) Evaluate the moles for each reactant (b) indicate the limiting reactant (c) how many moles of Al2(CO3)3 are formed?
Answer:
a) 0.06 mol K₂(CO₃) and 0.07 mol Al(NO₃)₃
b) The limiting reactant is K₂CO₃
c) 0.03 moles of Al₂(CO₃)₃
Explanation:
The balanced reaction between K₂CO₃ and Al(NO₃)₃ is the following:
3 K₂CO₃ + 2 Al(NO₃)₃ → Al₂(CO₃)₃ + 6 KNO₃
(a) We can calculate the moles for each reactant as the product of the molarity (M) and the volume (V) in liters.
K₂(CO₃): M = 2.4 mol/L , V = 25 mL x 1 L/1000 mL = 0.025 L
⇒ moles K₂(CO₃) = M x V = 2.4 mol/L x 0.025 L = 0.06 mol K₂(CO₃)
Al(NO₃)₃: M = 2.0 mol/L , V = 35 mL x 1 L/1000 mL = 0.035 L
⇒ moles Al(NO₃)₃ = M x V = 2.0 mol/L x 0.035 L = 0.07 mol Al(NO₃)₃
(b) According to the balanced equation, the stoichiometric ratio is 3 moles K₂CO₃/2 moles Al(NO₃)₃. We have 0.07 moles of Al(NO₃)₃, so we multiply the moles of Al(NO₃)₃ by the stiochiometric ratio to calculate how many moles of K₂CO₃ are needed:
0.07 mol Al(NO₃)₃ x 3 mol K₂CO₃/2 mol Al(NO₃)₃ = 0.105 moles of K₂CO₃
We need 0.105 moles of K₂CO₃ but we have only 0.06 moles of K₂CO₃. Therefore, the limiting reactant is K₂CO₃.
(c) We use the limiting reactant to calculate how many moles of product (Al₂(CO₃)₃) are formed. According to the equation, 2 moles of K₂CO₃ produce 1 mol of Al₂(CO₃)₃, thus the stoichiometric ratio is 1 mol Al₂(CO₃)₃/2 moles K₂CO₃. We have 0.06 moles of K₂CO₃, so the number of moles of Al₂(CO₃)₃ will be:
0.06 moles K₂CO₃ x 1 mol Al₂(CO₃)₃/2 moles K₂CO₃ = 0.03 moles of Al₂(CO₃)₃
PLZ HELP. Write and balance the following chemical equations:
nitrogen and oxygen combine to form dinitrogen pentoxide
Answer:
No they form nitrogen oxide which can be poisonous to some species but depending on the amount of nitrogen it can be harmful to everything living. Such as if you put it with a plant that had low nitrogen levels then there would be no carbon dioxide to filter.
Explanation:
Why particles start vibrating in solids?
it's argent
Explanation:
The particles of matter are continuously in motion due to which tehy collide with each other, and this creates a vibration in the solids
I hope it is correct ☺️
Which two statements describe organ systems working together to remove
wastes from the body?
A. The integumentary system gives off thermal energy that comes
from blood vessels.
B. The digestive system breaks down food into molecules that can
move into the blood.
C. The circulatory system carries oxygen-rich blood into muscles in
the legs.
D. The respiratory system exhales carbon dioxide that enters the
lungs from blood vessels.
How much heat is gained by 1.25 grams of ice?
Answer:
Heat gained by 1.25 grams of ice is 250 joules
Explanation:
As we know
[tex]Q = mc\Delta[/tex]T
Where
[tex]\Delta[/tex]T is the change in temperature
Water freezes at 273.15 K/0 degree Celsius, and it boils at 373.15 K/00 degree Celsius,
[tex]\Delta[/tex]T
m is the mass in grams
c is the specific heat of water (ice) = 2.05 joules/gram
Substituting the given values, we get -
[tex]Q = 1.25 * 2.0 * 100\\Q = 250[/tex]Joules.
Organisms trying to get the same resource.
Mutualism
Predation
Competition
Symbiosis
How many grams of KCI can be dissolved in 63.5. g of water at 80
Answer:
35.8 g
Explanation:
Step 1: Given data
Mass of water: 63.5 g
Step 2: Calculate how many grams of KCl can be dissolved in 63.5. g of water at 80 °C
Solubility is the maximum amount of solute that can be dissolved in 100 g of solute at a specified temperature. The solubility of KCl at 80 °C is 56.3 g%g, that is, we can dissolve up to 56.3 g of KCl in 100 g of water.
63.5 g Water × 56.3 g KCl/100 g Water = 35.8 g KCl
225.0 mL of air is at 23.0°C. What is the volume at 90.0 °C?
Answer:
276 mL
Explanation:
Using Charles law equation as follows:
V1/T1 = V2/T2
Where;
V1 = initial volume (mL)
V2 = final volume (mL)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question;
V1 = 225mL
V2 = ?
T1 = 23°C = 23 + 273 = 296K
T2 = 90°C = 90 + 273 = 363K
Using V1/T1 = V2/T2
225/296 = V2/363
Cross multiply
296 × V2 = 363 × 225
296V2 = 81675
V2 = 81675/296
V2 = 275.9
V2 = 276 mL
17. If the pOH of a solution is 4.5, What is the pH ?
A) 8.5
B) 7.5
C) 9.5
D) 7.0
Answer:
C)9.5
Explanation:
Given poH=4.5
find ph
from 14=ph+poh
14=ph+4.5
ph=9.5
Which change happens when a fan is turned on?
A. Electrical energy is changed into light energy
B. Heat energy is changed into mechanical energy
C. Mechanical energy is changed into sound energy
D. Electrical energy is changed into mechanical energy
Answer:
D. Electrical energy is changed into mechanical energy
Explanation:
When you turn on the fan, the electricity that is given through the power outlet allows the fan to have the available energy to spins the fan blades. By the fan's blades spinning, this is a movement that can be described as mechanical energy.
Si la masa de una muestra de un compuesto Y es de 196 gramos y contiene 2 mol, la masa molar de Y es
Answer:
98 g/mol
Explanation:
La masa molar de un compuesto es la cantidad de materia (medida como masa) que hay en 1 mol de dicho compuesto. Por lo tanto, puede calcularse como sigue:
masa molar = masa/número moles
Tenemos los siguientes datos del compuesto Y:
masa Y = 196 g
número de moles de Y = 2 mol
Entonces, podemos calcular la masa molar de Y de la siguiente manera:
masa molar Y = (masa Y)/(número de moles de Y) = 196 g/2 mol = 98 g/mol
Which object will experience the strongest gravitational attraction to Earth?
A. a car
B. a notebook
C. a desk
D. a bowling ball
Answer:
A
Explanation:
The strength of the gravitational force between two objects depends on mass and distance. The object with the greatest mass would be the car.
Why does chemical changes lead to the formation of compounds.Justify
Answer:
The addition of energy through the chemical reaction when substance combines and gets decomposed.
Explanation:
Chemical changes take place when the substance combines with some other to form a chemical synthesis and gets alternatively decomposed into 2 different substances through chemical reactions. As when the chemical reactions occur the atoms rearrange themselves. As these are accompanied by the energy changes. Such as those of sodium and water to produce sodium hydroxide and hydrogen. The chemical changes are found in organic, inorganic, and biochemical changes.
Fossil fuels produce energy by being burned and produce which of the following emissions?
A. CO and 03
B.H20 and NO2
C.03 and water vapor
D.CO2 and water vapor
Among all the given options, option d is correct options. Fossil fuels developed from the organic remnants of ancient plants and animals.
What are Fossil fuels?Fossil fuels are vital natural resources, as is widely known. They provide significant benefits to humanity, and we depend on them for energy. However, using fossil fuels has drawbacks as well.
Fossil fuels developed from the organic remnants of ancient plants and animals. The heat and pressure of the crust caused Earth to transform these million-year-old leftovers into fuels that include carbon.
The need for energy only increased after the Industrial Revolution. Similar to that, these fuels have had the ability to generate enormous amounts of energy to meet this need.
Therefore, the correct option is option D.
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Which statement best describes the most likely temperatures of Portland, Oregon, and Eugene, Oregon, on this day in January?
А
Eugene was a little colder than Portland because Eugene is a little closer to the coast.
B
Portland was a little colder than Eugene because Portland is a little farther to the north.
С
Portland was much colder than Eugene because Portland was north of the polar jet stream.
a
D
Eugene was much colder than Portland because Eugene was south of the polar jet stream.
Answer: Hello, There your Answer is Below.
A. Eugene was a little colder than Portland because Eugene is a little closer to the coast.
Explanation:
Hope this Helps you!!
Have a great day!!!
What are the 2 common uses for Copper?
How much energy is released if a sample loses 0.05 kg mass through
radioactive decay?
Answer:
4.5 × 1015 J
Explanation:
Energy was released through this form of mass.
The energy released if a sample loses 0.05 kg mass through
radioactive decay is 45 ×10¹⁴ J.
What is Energy?The ability to do work is called energy.
The Einstein's formula can be used to find the energy released. Energy is the product of mass and the velocity of light in a vacuum squared.
Given that the mass is 0.05 kg and speed of light in vacuum is 3×10⁸ m/s.
E = 0.05 × (3×10⁸)²
E = 45 ×10¹⁴ J
The energy is released if a sample loses 0.05 kg mass through
radioactive decay is 45 ×10¹⁴ J.
Learn more about Energy.
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What is a precipitation
reaction?
Answer:
A precipitation reaction is one in which substances in solution are mixed and an insoluble product is made. The insoluble product is called a precipitate and can be seen as a solid forming in the reaction mixture.
Hola!
Bonjour!
Niihau!
Hello!
How are you?! How has life been? This is a mental health check-in. If you see this and you don't think you need to answer this, please leave a spot open for someone who may need it or write in the comments!
So after that: How are you? Happy, Sad, Mad, Confused, Hurt, Slow? Anything. Just tell me anything. If you need advice you can say so and you could get helpful advice from people! I really hope you know you're special and loved beyond imagination. It's gonna be hard some days but that's how we appreciate the good days! :) Keep doing you boo! <3
Answer:
Hi! I'm feeling great and happy! Life's been good! How are you? :) Hope life's good for you and that you are staying safe.
Explanation:
the answers that can be written down are at the bottom
Answer:
increasing / protons / periods / groups / center / far right / similar
Hydrocarbons separated by fractional distillation of petroleum can be cracked to make
useful shorter chain products.
Which substance is not a product of the cracking of propane, M, 44?
A C.Hg
B C2H4
C C3H6
DH2
Q Zoom image
Answer:
{ x R X
Daraaranh
a
o
זחו
Answer:
c.hg cannot be cracked for fractional distillation as there is only one of each
Explanation:
Perform the following operation and express the answer in scientific notation. 7.0x10^3 x 1.1x10^7
Answer:
The answer is 7.7 ×10¹⁰
Explanation:
7.0 × 10³ × 1.1 × 10⁷
7.7 ×10¹⁰
Thus, The answer is 7.7 ×10¹⁰
-TheUnknownScientist
State of matter
A gas made up of homonuclear diatomic molecules escapes through a pinhole 3.98 times as fast as oxygen gas. Write the Chemical formula of the gas.
Answer:
H₂
Explanation:
To solve this question we must find, as first, find the molar mass of the homonuclear diatomic gas using Graham's law. With the molar mass we can identify this gas
Graham's law:
[tex]\frac{V_a}{V_b} =\sqrt{\frac{m_B}{m_A} }[/tex]
Where V is the speed of the gases and m the molar mass of those:
As Va is 3.98 times Vb (And mB is molar mass of oxygen gas = 32g/mol)
[tex]3.98 =\sqrt{\frac{32g/mol}{m_A} }[/tex]
15.84 = 32g/mol / mA
mA = 2.02g/mol
As is a homonuclear diatomic gas, the molar mass of the atom is 1.01g/mol. Thus, the gas is:
H₂why would a farmer add calcium hydroxide to his soil
according to the periodic table, which two elements have an atomic mass less than twice their atomic number?
Answer:
Hydrogen and Oxygen
Explanation:
Hydrogen atomic mass = 1.008 amu
atomic mass = 15.999 amu
According to the periodic table, two elements whose atomic mass is less than twice their atomic number are hydrogen and oxygen.
The atomic number of an atom refers to the number of protons in that atom. It serves as an identity for atoms of elements. The atomic mass of element is the weighted average of the masses of all the isotopes of the element.
The atomic number of oxygen is 8 while the atomic number of hydrogen is 1. The atomic mass of oxygen is 15.999 amu while the atomic mass of hydrogen is 1.0008 amu.
We can see that twice the atomic number of oxygen gives sixteen while twice the atomic number of hydrogen gives two. Therefore, two elements whose atomic mass is less than twice their atomic number are hydrogen and oxygen.
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electronics configuration
Answer:
Electronic configurations describe each electron as moving independently in an orbital, in an average field created by all other orbitals.
Explanation:
Convert 338 L at 3.0 atm to its new volume at standard pressure. 1,014L
Answer:
1014 L
Explanation:
From the question,
Applying
PV = P'V'.................... Equation 1
Where P = initial pressure, P' = Final pressure, V = Initial volume, V' = Final volume
make V' the subject of the equation
V' = PV/P'........... Euqation 2
Given: P = 3 atm, V = 338L, P' = 1 atm (Standard pressure)
Substitute into equation 2
V' = (3×338)/1
V' = 1014 L
Hence the new volume is 1014 L
How much water should be added to 5.00 g of KCl to prepare a 0.500 m
solution? *
Molality = moles of solute
Kg of solvent
100 g
38g
500 g
134 g
Other
Answer:133.4
c
m
3
Explanation: Explanation:
Molarity is number of moles of solute divided by number of litres of solution.
M
=
n
V
Rearrange for V to give
V
=
n
M
Number of moles of KCl is the mass divided by the molar mass of KCl which is 75.5 g/mol, so (5/75.5) = 0.0667 moles.
Now plug in the numbers:
V
=
n
m
=
0.0667
0.5
=
0.1334
litres
So you need to add 0.1334 litres of 133.4
c
m
3
of water.
(NB: symbol for molarity is upper case M. m is metres).