Answer:
Equilibrium composition for, no2 =.7365
The equilibrium composition for, nN2=3.76
Explanation:
Which part of the Periodic Table of the elements is used to identify valence electrons? *
Answer: Groups
Explanation:
The number of valence electrons of an element can be determined by the periodic table groups in which the element is categorized
P.S. Families rows in the table!
What other methods can be used to identify the components in drugs if you didn't have melting point data
Answer:
ósea un abrazo
Explanation:
....m.......
What does the half-life of a radioactive substance indicate?
A. It indicates how dangerous the substance is to humans.
B. It indicates how much energy is released over time.
C. It indicates how long it takes for the material to decay.
D. It indicates how long it takes until all radioactivity is gone
Answer:
it indicates how long it takes for the material to decay
Explanation:
hope this helps!
The half-life of a radioactive substance indicates how long it takes for the material to decay.
What is half-life of a radioactive?A half life is the amount of time it takes for half of a radioactive substance to decay.
Radioactive isotopes are defined as the isotopes which undergo decay processes very easily. They have very short half life. They are usually the isotopes of heavier elements.
Half life is defined as the time taken for the unstable isotope to fall to half its original value.
Hence, option C is correct.
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name the types of polymerization and the differences
How many molecules are present in 2 H₂ SO4
Answer:
1 mol of H2SO4 contains 6.022 x 10^23 molecules. : 0.5 mol of H2SO4 contains 0.5 x 6.022 x 10^23 molecules. = 3.011 x 10^23 molecules . that is 49 g of H2SO4 contains 3.011 x 10^23 molecules of H2SO
Explanation:
What is best illustrated by wattson and crick's ball-and-stick model of DNA
10 cm3 of metallic cylinder has a mass of 39.35 g. The density of this cylinder is
Group of answer choices
3.935 g/cm3
39.35 g/cm3
10 g/cm3
5.935 g/cm3
Answer:3.935g/cm3
Explanation:39.35 g. /10cm3 = 3.935g/cm3
10 cm³ of metallic cylinder has a mass of 39.35 g. The density of this cylinder is 3.935 g/cm³.
Density is a measure of the amount of mass per unit volume of a substance. It is an intensive physical property, meaning that its value does not change depending on the size of the object.
Density is calculated by dividing an object’s mass by its volume.
The density of water is 1,000 kg/m³ at 4°C. The unit of density is kg/m³ (kilogram per cubic meter). The SI unit of density is kg/m³
Density = mass/volume
= 39.35 g/10 cm³
=3.935 g/cm³.
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what is an example of density? pls helppp
Answer:
sruff that has to do wuth vikun=
Explanation:
good job
Can someone plz help me answer this question
Answer:
10 ml
Explanation:
The graduated cylinder contains 19 ml of water before the silver pellet is placed inside. Afterwards, the graduated cylinder measures 29 ml of water. Therefore the pellet displaced 10 ml of water. ( 29ml - 19ml = 10ml )
why is water a compound but hydrogen an element
Compounds are made of more than one element hence water is made of 2 Hydrogen and one Oxygen, but nacent Hydrogen is single hence it is an element.
The sun is 93 million miles from the earth approximately how many years would it take to travel from earth to the sun if a person flew in a spaceship at 55 miles an hour?
(Hint:begin by dividing the distance by the speed to determine the number of hours it would take. Round your answers the the nearest whole number.)
Answer:
it would take 2 years
Explanation:
93/55=1.69--->1.70------>2
What's you favorite food
Answer:
all of it
Explanation:
my favourite food is pasta.
What will happen to the atoms and molecules of a substance when it undergoes a
chemical reaction?
Answer:They change
Explanation:
Be more specific the next time you ask a question :)
a wooden baseball bat is an example of
a: compound
b: element
c: heterogeneous
d: homogeneous
A wooden baseball bat is an example of a heterogeneous substance.
A heterogeneous substance is consists of compounds that are not thoroughly mixed together.
Woods are fibrous structural substances with spaces present in trees and other woody plants' stems as well as roots. They are composed of a natural composite of cellulose fibers and are contained with a lignin matrix that is capable of resisting compression.
They can use for fire, building, the manufacture of weapons and tools, furniture, as well as paperwork.
Wood is a heterogeneous, highly porous cellular material. It is made up of cells and the cell walls are made up of roughly 40% cellulose, 15% hemicellulose, and lignin of about (15–30%).
Therefore, we can conclude that a wooden baseball bat is an example of a heterogeneous substance.
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For Carbon - 14, the top number will be ____. The bottom number will be ____.
The three most common phases of matter are _______.
Answer:
solids, liquids, gases
why does magnesium donate two electrons to oxygen in order to form magnesium oxide (MgO)?
Answer:
electron arrangement of Mg is 2.8.2. To reach a stable octet electron arrangement Mg donates 2 electron to oxygen.Hence, Mgo ion formed.
Einstein also said that gravity can affect not just mass but...
A.nothing else, just mass.
B.light waves or energy
C.everything.
Answer:
B. Light waves or energy
Explanation:
Einstein argued that gravity isn't a force at all. He described it as a curvature of time and space caused by mass and energy.
PLZ MARK ME BRAINLIEST.Salicyllic acid has what ionic charge?
Answer:
0
Explanation:
It has no charge.
Salicylic acid is insoluble in water because it is a non-polar covalent compound.
For this reason it is a poor conductor of electricity as it has no free moving ions that would act as charge carriers.
But on the other hand salicylate which is a conjugate base of salicylic acid has a charge of -1 and can be written as C7H5O3-.
hopefully this makes sense
:)
Calculate the volume of CO₂ at NTP occupied by 44.4 gram of heat
We know at NTP each gas has 22.4L of volume .
[tex]\boxed{\sf 1mol\:of\:CO_2=22.4L=44g}[/tex]
Hence 1g of CO2 contain
[tex]\\ \sf\longmapsto \dfrac{22.4}{44}[/tex]
[tex]\\ \sf\longmapsto 0.5L[/tex]
Now 44.4g of CO_2 has
[tex]\\ \sf\longmapsto 0.5\times 44.4=22.2L[/tex]
(d) Calculate the relative molecular mass of ammonium sulphate (NH4)2SO4.5H2O
[A, O= 16.0; H= 1.0; C= 12.0; N= 14.0; S= 32.1]
Answer:
222.1
Explanation:
(14+4*1)*2+32.1+16*4+(2*1+16)*5=222.1
Metric Conversion: Which units are equivalent (the same) as 75g? (Pick 3)
(1 Point)
7500 mg
750 dg
7.5 dag
.075 Kg
The unit that is equivalent to 75g is 0.075 kg, 750 dg, and 7.5 dag. The correct options are b, c, and d.
What are measuring units?Measuring units are the units used to denote the measurement quantities. There are seven basic measuring units. They are length, Time, Amount of substance, Electric current, Temperature, Luminous intensity, and Mass.
The current unit is given grams, which are used to measure the mass of any object.
1000 grams is equal to 1 kilogram and 1 dg = 0.1 g, and 1 dag = 10 g. So by this formula, each of the quantities can be calculated.
1 kg = 1000 g
So, 0.075 kg = (0.075 × 1000)g = 75 g
1 dg = 0.1 g
So, 750 dg = (750 × 0.1) g = 75 g
1 dag = 10 g
So, 7.5 dag = (7.5 × 10) g = 75 g
Thus, the correct options are b. 750 dg, c. 7.5 dag, and d. .075 Kg.
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How many atoms? H_____, O_____, Fe_____ Total atoms? _____ 3Fe(oh)2
Answer:
H = 6
O = 6
Fe = 3
Total atoms = 15
Explanation:
3Fe (OH)2
Fe = 1×3
O= 2× 3 = 6
H= 2× 3 = 6
Total atoms = 6+6+3=15
I hope I helped you^_^
Calculate the mass of 1 molecule of water
with step
Molecular Mass of water:-
[tex]\\ \sf\longmapsto H_2O[/tex]
[tex]\\ \sf\longmapsto 2(1u)+16u[/tex]
[tex]\\ \sf\longmapsto 2u+16u[/tex]
[tex]\\ \sf\longmapsto 18u[/tex]
[tex]\\ \sf\longmapsto 18g[/tex]
1mole of water weighs 18g
We know
[tex]\\ \sf\longmapsto 1mol=6.023\times 10^23molecules[/tex]
Mass of one molecule:-
[tex]\\ \sf\longmapsto \dfrac{18}{6.023\times 10^23}[/tex]
[tex]\\ \sf\longmapsto 2.98\times 10^24g[/tex]
If a recycling center collects 3245 aluminum cans and there are 22 aluminum cans in 1 lb what volume in liters
The volume in liters of 3245 aluminum cans is 24.8 L.
A recycling center collects 3245 aluminum cans and there are 22 aluminum cans in 1 lb. The mass of 3245 aluminum cans is:
[tex]3245 cans \times \frac{1lb}{22cans} = 147.5 lb[/tex]
To convert mass to volume, we need the density of aluminum (5.95 lb/L). The volume corresponding to 147.5 lb of aluminum is:
[tex]147.5 lb \times \frac{1L}{5.95 lb} = 24.8 L[/tex]
The volume in liters of 3245 aluminum cans is 24.8 L.
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Pioneer 10 is a 267.1-kilogram robotic space probe that completed the first interplanetary mission
to Jupiter, and became the first spacecraft to achieve escape velocity from our solar system. How
much does it weight in pounds (lbs)?
Answer: 588.9 lbs
Explanation: 1 lb = 0.454 kg
(267.1kg)*(1 lb/0.454 kg) = 588.9 lbs
Please help me please find the answer
I have already answered this question once. Anyways please let me know whether it is useful or not
what provided evidence of the big band theroy
Answer:wo major scientific discoveries provide strong support for the Big Bang theory: • Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.
Explanation:
Determine the number of protons, neutrons, and electrons in the following isotopes
that are used in medical diagnoses:
a. atomic number 9, mass number 18, charge of 1-
b. atomic number 43, mass number 99, charge of 7+
C. atomic number 53, atomic mass number 131, charge of 1-
d. atomic number 81, atomic mass number 201, charge of 1+
e. Name the elements in parts (a), (b), (c), and (d).
Answer: In table below.
Explanation:
A.N. (atomic number) = protons
Mass (Total AMU)
Charge
P= Protons, same as atomic number
N = Neutrons, Atomic Mass Number - Protons
E = Electrons. (Atomic Number - Charge)
Element = Defined by atomic number
a) Atomic number=9 Protons = 9, neutrons = 9, electrons = 10
b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36
c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52
d) Atomic number=81, Protons = 81, neutrons = 120, electrons = 80
e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.
What is the atomic number?Atomic Number (Z)= number of protons = number of electrons
Mass number (A) = number of protons + number of neutrons.
For ions with a positive net charge:
Number of electrons = Z - net charge
For ions with negative net charge:
Number of electrons = Z + net charge
a) Atomic number=9 Protons = 9, neutrons = 9, electrons = 10
b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36
c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52
d) Atomic number=81, Protons = 81, neutrons = 120, electrons = 80
e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.
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give the name and symbol of your favorite element and explain why it your favorite element.
Answer:
The most important elements that we use in everyday life include carbon, hydrogen, oxygen, with smaller amounts of things like chlorine, sulfur, calcium, iron, phosphorus,nitrogen, sodium, and potassium. Apart from these, other elements include magnesium, zinc, neon, and helium are also in our daily existence.
all these element are my favourite element .......