The famous formula E=mc^2 really says that mass and energy are the same thing, but measured in different units. So the separate laws of conservation- one for mass and the other for energy- are now merged into one law.
Einstein's theory of special relativity (1905) shows that matter (as mass) and energy can be converted into each other according to the famous equation E = mc2, where E is energy, m is mass, and c is the speed of light.
Hope It helps you.
The formula of gypsum and that of plaster of parls are CaSO4.xH2O and CaSO4.yH2O respectively.
The difference x-y equals to;
1) 1
2) 3/2
3) 5/2
4) 1/2
Help me
Answer:
[tex]\frac{3}{2}[/tex]
Explanation:
Given formula of Gypsum:
CaSO₄. xH₂O,
True formula:
CaSO₄. 2H₂O, x = 2
Formula of plaster of paris = CaSO₄. [tex]\frac{1}{2}[/tex] H₂O,
y = [tex]\frac{1}{2}[/tex]
The difference between x and y; x - y:
x - y = 2 - [tex]\frac{1}{2}[/tex] = [tex]\frac{3}{2}[/tex]
You can tell if an unknown substance is an base because:
Answer:
if it is hydroxide
Explanation:
when metal. and non-metal most the time reacts and the none metal is hydroxide u can easily say it Is base
who will help it science
Answer:
yuh because it's the hot water :)
2. Which of the following interactions would be the weakest?
A. Lit and C4H10
B. 02- and C3Hg
C. Lit and C3H8
D. 02- and C4H10
Answer:
its rather B or C
Im sorry if I was wrong
Explanation:
Can one mole of peas fit inside your house? List the materials and steps of an experiment that answers the
question without actually filling up your house with peas!
Answer:
No.
Explanation:
No, one mole of peas do not fit inside a house because one mole is equals to 6.022 × 10²³ units which is a very large value. mole only use for atoms, ions and molecules etc due to very small size but mole is not used for big sized materials such as peas and other vegetables etc. So that's why we can conclude that one mole of peas did not fit inside a house.
which
state
one
mose
in poverty?
Answer:
New Hampshire is the most in proverty.
Explanation:
I learned this before.
Answer:
Oklahoma state
Explanation:
please mark me as brainliest
A pH of 1 there are a lot of ______ in a solution. 2.A pH of 14 there are a lot of ______ in a solution.
Answer:
Hydrogen or hydroxonium ions in the solution
Hydroxyl ions in the solution
Explanation:
A pH of 1 shows there is a lot of hydroxonium ions in the solution and a pH of 14 shows there is a lot of hydroxyl ions in the solution.
The pH scale ranges from 1 to 14 As the values tends towards 1, the acidity increases due to concentration of hydroxonium ions in the solution. As the pH tends towards 14, the basicity increases due to the concentration of hydrogen ions in the solution.How many molecules are in 0.0740 mol NH3?
Number of molecules NH₃ = 4.45 x 10²²
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mol of NH₃ = n = 0.074
So the number of molecules :
[tex]\tt N=n\times No\\\\N=0.0740\times 6.02\times 10^{23}\\\\N=4.45\times 10^{22}[/tex]
how dose pendulum work
Answer:
Pendulum, body suspended from a fixed point so that it can swing back and forth under the influence of gravity. Pendulums are used to regulate the movement of clocks because the interval of time for each complete oscillation, called the period, is constant.
Explanation:
It is a simple tool which helps in balancing, healing and clearing our mind and body. They help us seek answers to certain questions by picking on subtle vibrations. They do so by moving in the direction of invisible energy around us.
What happens to ions during bonding to form an ionic compound? O Cations accept electrons and anions give away electrons. O Anions and cations share electrons. O Cations give away electrons and anions accept those electrons.
Answer:
Last one: Cations give away electrons and anions accept those electrons.
Explanation:
Just did it
Answer:
D
Explanation:
"Cations give away electrons and anions accept those electrons."
Which statement or question is a good hypothesis?
A. Taxicabs are yellow.
B. Red cars are cooler than green cars.
C. Black cars heat up faster in sunlight than white cars.
D. What color of car sells best?
Answer:
c is the awnser
a hypothesis is not a question it is more like a statment and something that could be proven in the future
a lever was used to lift a heavy rock the input force was 150 n and the output force was 500 n what was the mechanical advantage of the pulley
Answer:
Option A. 3.3
Explanation:
The following data were obtained from the question:
Input force = 150 N
Output force = 500 N
Mechanical advantage (MA) =.?
Mechanical advantage can be defined as force output divided by force input i.e
Mechanical advantage (MA) = force output / force input
With the above formula, we can obtain the mechanical advantage of the pulley as shown below:
Input force = 150 N
Output force = 500 N
Mechanical advantage (MA) =.?
MA = force output / force input
MA= 500/150
MA = 3.3
Thus, the mechanical advantage of the system is 3.3
What is magnetic fields?
What volume (liters) of aqueous 0.325 M nitric acid is required to react completely with 3.68 g barium hydroxide?
Volume (liters) of aqueous 0.325 M nitric acid is 0.132 L
Further explanationReaction
2HNO₃ + Ba(OH)₂ → Ba(NO₃)₂ + 2H₂O
mass of Ba(OH)₂ = 3.68 g
mol Ba(OH)₂(MW=171,34 g/mol) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{3.68}{171,34 g/mol}\\\\mol=0.0215[/tex]
From the equation, mol ratio of HNO₃ : Ba(OH)₂ = 2 : 1, so mol HNO₃:
[tex]\tt mol~HNO_3=\dfrac{2}{1}\times 0.0215=0.043[/tex]
Molarity of HNO₃ = 0.325, then the volume of HNO₃ :
[tex]\tt V=\dfrac{n(mol)}{M(molarity)}\\\\V=\dfrac{0.043}{0.325}\\\\V=0.132~L[/tex]
True or false. When an area within an atom is crowded with electrons it is known as a dipole "moment False True
Answer:true
Explanation:
Answer:
im not sure but ill say false
Explanation:
The pressure of a mixture within a rigid container of nitrogen, carbon dioxide and oxygen is 150 kPa. What
is the partial pressure of oxygen if the partial pressures of nitrogen and carbon dioxide are 100 kPa and 24
kPa, respectively?
Answer:
P(O₂) = 26KPa
Explanation:
Given data:
Total pressure = 150 KPa
Partial pressure of nitrogen = 100 KPa
Partial pressure of carbon dioxide = 24 KPa
Partial pressure of oxygen = ?
Solution:
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P (total) = P(O₂) + P(N₂) + P(CO₂)
150 KPa = P(O₂) + 100 KPa + 24 KPa
150 KPa = P(O₂) + 124 KPa
P(O₂) = 150 KPa - 124 KPa
P(O₂) = 26KPa
The equation below represents the combination of gaseous atoms of non-metal X and of hydrogen to form gaseous X2He6 molecules. 2X(g) + 6H(g) → X2H6(g) AH = -2775 kJ mol The bond energy of an X-H bond is 395 kJ mol. What is the bond energy of an X-X bond? A - 405.0kJmol-¹ B -202.5kJmol-¹ C +202.5kJ mol-¹ D +405.0kJ mol-¹
Answer:
D +405.0kJ mol-¹
Explanation:
Since bond energy is the energy required to break a bond, the energy of dissociation of X₂H₆ = +2775 kJmol⁻¹.
Since there is one X-X bond and six X-H bonds,
Bond energy of one X-X bond + Bond energy of six X-H bonds = energy of dissociation of X₂H₆.
Since bond energy of one X-H bond = 395 kJ mol⁻¹, then
Bond energy of one X-X bond + Bond energy of six X-H bonds = energy of dissociation of X₂H₆
Bond energy of one X-X bond + 6 × one X-H bond = +2775 kJmol⁻¹.
Bond energy of one X-X bond + 6 × 395 kJ mol⁻¹ = +2775 kJmol⁻¹.
Bond energy of one X-X bond + 2370 kJ mol⁻¹ = 2775 kJmol⁻¹
Bond energy of one X-X bond = 2775 kJmol⁻¹ - 2370 kJ mol⁻¹
Bond energy of one X-X bond = +405 kJmol⁻¹
A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this 2-heptanone compound is CH3C4H8COCH3. How many atoms of each element are in one molecule of 2-heptanone?
Question 2 options:
4 carbon atoms, 11 hydrogen atoms, and 1 oxygen atom
7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom
7 carbon atoms, 11 hydrogen atoms, and 8 oxygen atoms
6 carbon atoms, 14 hydrogen atoms, and 3 oxygen atoms
Answer:
B
Explanation:
Sorry if wrong
Answer:It’s D, when you add up the atoms for carbon you get 6, and the only answer choice with 6 is D
Help someone!!!I will mark you brainliest
Answer:
a) Na2S
b) AlF3
c) O2
d) C6H12O6
Explanation:
please mark me brainliest and 5 star
1)Calculate the molar masses for the following compounds.
a)NH4NO3
b) N2O5
c) NaCN
d)(NH4)2SO4
2.a)What is the volume of 0.001 mol of hydrogen (H2) gas at STP?
b)What is the mass of 5.6 L of CO2 gas at STP?
3)a. What is the total number of atoms found in 3 moles of a N2 molecule?
b.Calculate the number of helium (He) atoms if 0.05 moles of He is given.
4.a)What is the mass of 3 moles of NaOH? b)What is the mole number of 22 g of CO2 gas?
5.a)What is the number of moles of 224 L Chlorine (Cl2) gas at STP?
b) Find the masses for the following substances in grams- 1)1.5 mol of water 2)20 mol of C₂2H6 6. If 10 moles of oxygen (O2) molecules are given, calculate the volume of the oxygen molecules at STP.
7. What is the mass of 3 moles of NaOH?
NH4NO3 The molar mass is 80.04336 g/mol
N2O5 The molar mass is 108.01.
NaCN The molar mass is 49.00717 g/mol
(NH4)2SO4 The molar mass is 132.139 g/mol .
Molar masses
The mass in grams of one mole of a chemical is its molar mass.
1) What is the mass of 5.6 L of CO2 gas at STP?
PV = nRT is the ideal gas equation, which links pressure (P), volume (V), and absolute temperature (T).
where R = 8.314 Jmol K-1, the universal gas constant.
1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 atm = 1.1310 5 Nm 2
V=nRT/P =1.8.14.273/(1.013.10 5) =0.0224 m 3
2.24 liters
As a result, a gas's molar volume at STP is 22.4 litres.
To learn more about molar mass refer:
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Which type of orbital is shown?
Answer:
2px orbital...
Orbitals are represents the wave-like behavior of an electron or pair of electrons in an atom. Therefore it shows 2pX orbital.
What is orbitals ?
The four fundamental kinds of orbitals are s, p, d, and f. The spherical form of a s orbital can accommodate two electrons.
Each of the three p orbitals has the same fundamental structure but differs in its spatial orientation. Up to six electrons can fit into the p orbitals.
The s sublevel can only hold two electrons because it has one orbital. The p sublevel has three orbitals and a maximum capacity of six electrons.
The d sublevel may hold a maximum of 10 electrons due to its five orbitals. Additionally, the 4 sublevel has 7 orbitals and a maximum of 14 electrons.
Thus, it shows 2pX orbital.
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4.imidazole has two nitrogen atoms, labeled as n3 and n1. please indicate which nitrogen is more basic. draw the products of protonating both nitrogen atoms and use this as part of your explanation.
[tex]N_3[/tex] is more basic than [tex]N_1[/tex] in imidazole.
Imidazole have two nitrogen attached in the ring at [tex]N_1 and N_3[/tex] .
This compound is an aromatic compound as it have [tex](4n+2)[/tex]π electrons which means lone pair electrons of [tex]N_1[/tex] nitrogen atom also takes part in π
system.
Thus when a proton attacks on this compound it easily attacks at [tex]N_3[/tex] rather than [tex]N_1[/tex].
After the attack of [tex]H^{+}[/tex] ion at [tex]N_3[/tex] the conjugate base thus formed is also aromatic and hence is more stable.
If the proton had attacked at [tex]N_1[/tex] the conjugate base would not be aromatic and its stability will decrease.
The reaction is shown in the image attached
To know more about protonation
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ASAP please and Thankyou
Explanation:
green is dominate and theres a G in each box that makes it all Green
Multi-Step Conversions (Always go through moles!)
Example: How many grams of water (H2O) will you need in order to have
3.22 x 1024 water molecules?
Mass of water needed : 96.3 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
moles H₂O=
[tex]\tt moles=\dfrac{N}{No}\\\\moles=\dfrac{3.22\times 10^{24}}{6.02\times 10^{23}}\\\\moles=5.35[/tex]
mass H₂O(MW=18 g/mol) :
[tex]\tt mass=moles\times MW\\\\mass=5.35\times 18\\\\mass=96.3~g[/tex]
Which element forms an ion that is larger than its atom
Answer:
Electronegative element form anion that is larger than its neutral atom like fluorine F-
Explanation:
How many moles of Ba(NO3)2 are there in 0.25 L of a 2.00 M Ba(NO3)2 solution?
Use Molarity equals StartFraction moles of solute over liters of solution EndFraction..
0.13 mol
0.50 mol
2.25 mol
8.0 mol
Answer:
0.5moles
Explanation:
Given parameters:
Volume of solution= 0.25L
Molarity of solution = 2.00M
Unknown:
Number of moles = ?
Solution:
To solve this problem;
Molarity is the number of moles of solute in a given volume of solution, so
Number of moles = molarity x volume
Now insert the parameters and solve;
Number of moles = 0.25 x 2 = 0.5moles
Answer:
b
Explanation:
got it right on test
What letter represents the trough? :) PLEASE FAST!
1) A
2) B
3) C
4) D
what element is [Ar] 452 3010 5p5
Answer:
Argon
Explanation:
Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas
hope it helps!
A chemical reactions is shown. How many different elements and total atoms are involved in the reaction?
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, to determine the number of different element participating in a reaction, count the number of individual atoms participating the reaction. For example,
H₂SO₄ + 2NaOH ⇒ Na₂SO₄ + 2H₂O
The number of different elements involved in the reaction above are hydrogen (H), sulphur (S), oxygen (O) and sodium (Na). This means there are 4 different elements involved in the reaction.
But to determine the total number of atoms involved in a reaction, one must first ensured the reaction is balanced (because the number of each atom must be considered). Using the same reaction illustrated earlier hydrogen (H) has 2 atoms in H₂SO₄ and 2 atoms in NaOH, sulphur (S) has 1 atom in H₂SO₄, oxygen (O) has 4 atoms in H₂SO₄ and 2 atoms in NaOH and sodium (Na) has 2 atoms in NaOH. Thus, total number of atoms is 13 atoms.
Note that the number of atoms on the reactant side would be same as number of atoms on product side because of law of conservation of matter. Thus, participating atoms in the reaction is 13
Which force saves the atom by emitting particles from the nucleus?
Answer:
nuclear force
I hope this helps :)
Explanation: