Answer:
4.99 × 10²³ atomsExplanation:
The number of atoms of gold can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 0.83 × 6.02 × 10²³
We have the final answer as
4.99 × 10²³ atomsHope this helps you
How does a ligand bind to the proper receptor?
Answer:
The ligand crosses the plasma membrane and binds to the receptor in the cytoplasm.
Answer:
The receptor then moves to the nucleus, where it binds DNA to regulate transcription.
1. Which scenario best describes Newton's 1st law?
Answer:
option B . because acording to Newton 1st law until or unless you donot apply force the object will not move or stops.
Explanation:
What else is produced during the combustion of butane C4H10?
2C4H10 + 130,2 --> 8______ + 10H2O
Which of the following contains the most atoms?
Select one:
a. 2.9.0122 g Be
b. 39.098gk
c. 24.305 g Mg
d. 21.62gb
Answer:
b
Explanation:
Use the periodic table
What is the percent yield of a reaction?
a.the difference between measured and calculated amounts
b.the amount of product obtained / amount possible x100
c. The amount of product actually obtained in a reaction
d. The amount of product that is possible from a reaction
Answer:
B
Explanation:
A P E X
The amount of product obtained / amount possible x100. Hence, option B is correct.
What is the per cent yield of a reaction?To express the efficiency of a reaction, calculate the per cent yield using this formula:
%yield = (actual yield/theoretical yield) x 100.
A per cent yield of 90% means the reaction was 90% efficient, and 10% of the materials were failed and not in use.
Hence, option B is correct.
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hey i got a question for science its " you throw a rock with a mass of 3.6 kg. the ball leaves your hand with a speed of 10 m/s DO NOT INCLUDE J IN THE ANSWER
it is 3.9 i know tgis because you throw a rock with a mass of 3.6 kg. the ball leaves your hand with a speed of 10
What is the volume of 45g of benzene, C6H6 at 100°C and 250 Torr?
Answer:
V = 53.82 L
Explanation:
Given data:
Mass of benzene = 45 g
Temperature = 100°C (100+273 = 373 K)
Pressure = 250 torr (250/760 = 0.33 atm)
Volume of benzene = ?
Solution:
Number of moles of benzene:
Number of moles = mass /molar mass
Number of moles = 45 g/ 78.11 g/mol
Number of moles = 0.58 mol
Volume of benzene:
PV = nRT
V = nRT/P
V = 0.58 mol × 0.0821 atm.L/mol.K × 373 k / 0.33 atm
V = 17.76 atm.L /0.33 atm
V = 53.82 L
Please helppp
Which of the following trends is decreasing as you move from left to right across this portion of the Periodic Table?
Atomic number
Metallic character (becoming less metal like)
Number of atomic orbitals
Number of valence electrons
Answer:
Metallic character (becoming less metal like)
Explanation:
I took the test
1. Explain why BCl3 monomer but BH3 exist as B2H6.
Answer:
See explanation
Explanation:
Both BCl3 and BH3 are electron deficient compounds. In these compounds, boron has six instead of eight electrons surrounding it's outermost shell.
BH3 is able to form a dimmer because of the small size of hydrogen atoms which enable them to be fitted between boron atoms. Large size chlorine atoms can not be fitted between boron atoms hence B2Cl6 does not exist.
What is the chemical name of the fruit orange
Answer:
The chemical name is C16H11N2NaO4S
Explanation:
Is there a phobia for chemical reactions specifically?
Answer:
chemonoia
Explanation:
Many people have a strong fear of “chemicals” that belies the evidence. It's called chemonoia – and it may be damaging their health. If you were paranoid, you might think there really was something in the water that's damaged our sense of reason.
Name the Compound CS4
Monocarbon tetrasulfide
Monocarbon sulfide
Carbon tetrasulfide
Carbon sulfide
Answer:
Monocarbon tetrasulfide
Explanation:
Name of compound is mono carbon tetrasulfide.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Benzene has been used as a solvent for waxes and oils. In 1981 the EPA listed benzene as a carcinogen. What is the molecular formula of benzene if the empirical formula is C1H1, and the approximate molar mass is 78 g/mol
Answer:
C₆H₆
Explanation:
From the question given above, the following data were obtained:
Empirical formula = CH
Molar mass of compound = 78 g/mol
Molecular formula =?
The formula of the compound can be obtained as follow:
Molecular formula = n × Empirical formula
Molecular formula = ₙ[CH]
n[CH] = 78
n[12 + 2] = 78
14n = 78
Divide both side by side 14
n = 78/14
n = 6
Molecular formula = ₙ[CH]
Molecular formula = ₆[CH]
Molecular formula = C₆H₆
Thus, the molecular formula of the compound is C₆H₆
Energy that is stored due to a shape is called
energy
Can someone help with question 6 ASAP
Answer:
A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals. There is no standard definition of a metalloid and no complete agreement on which elements are metalloids. Despite the lack of specificity, the term remains in use in the literature of chemistry.
A series of six elements called the metalloids separate the metals from the nonmetals in the periodic table. The metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. These elements look metallic; however, they do not conduct electricity as well as metals so they are semiconductors. They are semiconductors because their electrons are more tightly bound to their nuclei than are those of metallic conductors. Their chemical behavior falls between that of metals and nonmetals. For example, the pure metalloids form covalent crystals like the nonmetals, but like the metals, they generally do not form monatomic anions. This intermediate behavior is in part due to their intermediate electronegativity values. In this section, we will briefly discuss the chemical behavior of metalloids and deal with two of these elements—boron and silicon—in more detail.
Explanation:
i hope this helps you :)
write the formula of cryolite .
Answer:
[tex]Na_{3} AlF_{6}[/tex]
how does newtons three laws effect bowling?
Answer:
The laws allow the ball to move
Explanation:
first law - an object in motion (the bowling ball) will go until the friction of the lane stops it
second law - f=m*a, the force in which you bowl, equals the mass of the ball, times the acceleration of the ball
third law - the action, is you bowling the ball and it rolling down the lane, the reaction is the friction slowing the ball down. Another action is the ball hitting the pins, the reaction is the pins falling.
I hope this helps.
can someone pls answer this i’ll love you
Answer:
we kno you already do :)
Which pair of orbitals has the same shape?
Your answer:
2s and 2p
2s and 1s
3p and 3d
more than one is correct
Answer:
2s and 1s
Explanation:
The s orbital is spherically symmetrical. The wave function depends on the distance from the nucleus and not on the direction.
The 2s and 1s orbitals are of the same shape only that the 2s orbital is larger than the 1s orbital.
The images of these orbitals are shown in the image attached.
The pair "2s and 1s" has the same shape. A complete explanation is below.
Throughout Mendeleev's table, the "s" orbital has a sphere as well as round symmetry. This same wave function would be determined by the difference again from the nucleus rather than the directions.These same 2s, as well as 1s orbitals, are approximately identical in form, with the exception being the 2s orbital appears bigger than the whole 1s orbital.
Thus the above alternative i.e., "option B" is appropriate.
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How much heat will a 45.00 g piece of glass require to change its temperature from 10 to 30 °C. The specific heat capacity is 0.500 J/g°C.
675 J
225 J
450 J
700 J
Answer:
Q = 450 J
Explanation:
Given that,
Mass of a piece of glass, m = 45 g
The temperature changes from 10°C to 30°C.
The specific heat is 0.5 J/g°C
We need to find heat required to raise the temperature. The formula that is used to find it is given by :
[tex]Q=mc\Delta T\\\\Q=45\times 0.5\times (30-10)\\\\Q=450\ J[/tex]
So, the required heat is 450 J. Hence, the correct option is (c).
162.4 NH3 =____mol NH3
Answer:
162.4
Explanation:
Because yea thats the answer no need to tell you why ok bye
Please help. I'll give brainliest :)
Which answer describes a type of chemical weathering?
A. ice freezing in rock crevices
B. tafoni from salt crystallization
C. water changes rock crystals into hydrates
D. moving water over rock
Answer:
The answer is c, i just got it right on my test
Explanation:
stay safe!
geologists classify sedimentary rocks as either clastic chemical or organic
Answer:
both. yes
Explanation:
The glancing angle (θ) of a Bragg reflection (n = 1) from a set of crystal planes separated by 99.3 pm is 10.42°. Calculate the wavelength of the X-rays that is used.
Answer:
wavelength λ = 35.92 pm
Explanation:
Given that:
The glancing angle (θ) = 10.42°
Bragg reflection n = 1
wavelength λ = ???
diameter d = 99.3 pm
Using the formula:
nλ = 2dsinθ
we have:
1 × λ = 2 × ( 99.3) × sin (10.42°)
λ = 198.6 × 0.18086
λ = 35.92 pm
The wavelength of the X-rays that is used is equal to 35.9 nanometers.
Given the following data:
Bragg reflection, n = 1Glancing angle (θ) = 10.42°.Distance between planes = 99.3 picometers.To calculate the wavelength of the X-rays that is used, we would apply Bragg's law of reflection:
Mathematically, Bragg's law of reflection is given by the formula:
[tex]n\lambda = 2dsin\theta[/tex]
Where:
n is Bragg reflection.d is the distance between crystal planes.[tex]\lambda[/tex] is the wavelength.[tex]\theta[/tex] is the reflection angle.Substituting the given parameters into the formula, we have;
[tex]1 \times \lambda = 2 \times 99.3 \times 10^{-11} \times sin(10.42)\\\\ \lambda = 1.99 \times 10^{-9} \times 0.1809\\\\\lambda = 3.59 \times 10^{-10}[/tex]
Wavelength = 35.9 nanometers.
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The equation for the synthesis of ammonia is below. How many moles of H 2 are
needed to produce 9.33 moles of NH3?
EQUATION: N2 + H2 = NH3
Answer:
Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3.
Explanation:
Hydrogen is the limiting reactant. In other words, Hydrogen will run out before Nitrogen because it takes 3 mole of H2 and just 1 mole of N2 to make 2 mole NH3. What is the greatest amount of MgO (in moles) that can be made with 7.8 moles of Mg and 4.7 moles of
How many moles of Helium would be equal to 55 liters of helium?
Answer:
Solution: 3.78 L He. 22.4 L. 1 mol. = 0.169 mol He.
Explanation:
Answer:
3.78 liters
Explanation:
If a balloon is filled with 3.78 L of He gas is at STP.
Which of the following is true about the reactions shown below?
C5H12 + 8 02 --> 5 CO2 + 6 H20 *
(1 Point)
O 9 moles of reactants chemically change into 11 moles of product
9 liters of reactants chemically change into 11 liters of product
9 atoms of reactants chemically change into 11 atoms of products
9 grams of reactants chemically change into 11 grams of products
the answer to this equation is " double replacement "
hopefully i helped
Answer:
9 moles of reactants chemically change into 11 moles of product
Explanation:
Which of the following statements is NOT true about Olympus Mons?
It is 3 times as high as Mount Everest.
O Its base is about the same size as Arizona.
It is the largest mountain in the solar system.
It have never erupted.
Answer:
The largest of the volcanoes in the Tharsis Montes region, as well as all known volcanoes in the solar system, is Olympus Mons. Olympus Mons is a shield volcano 624 km (374 mi) in diameter (approximately the same size as the state of Arizona), 25 km (16 mi) high, and is rimmed by a 6 km (4 mi) high scarp.
Explanation:
¿Cuáles son las grasas e hidróxidos más efectivos en la elaboración de jabón?
Answer:
Las sales ideales para la saponificacion es la combinacion de grasas complejas con muchas cadenas de trigliceridos y de la soda caustia.
Explanation:
Un ejemplo de estos son la grasa vacuna o la aceite de cocina de consumo tradicional y la soda caustica que es el hidroxido de sodio.
Juntos estos dos productos forman el proceso de saponificacion.
Arrange the following elements (E, K, P, B) according to increasing atomic radius
Answer:
B
P
K
Explanation:
K: 203pm
B: 84pm
P: 107pm
There isn't an E on the Periodic Table?!