Answer:
C
Explanation:
It is most likely non metal with a high electronegativity.
the atomic masses of 63 cu (69.17 percent) and 65 cu (30.83 percent) are 62.94 and 64.93 amu, respectively. calculate the average atomic mass of copper. the percentages denote the relative abundances
Answer:
The average atomic mass of copper is 63.55 amu.
Explanation:
hope this help
What is the pressure of 1.50 moles of a gas in a 30.0L tank at a temperature of
285K?
The pressure of the gas : 1.1685 atm
Further explanationIn general, the gas equation can be written
[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]
where
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.08206 L.atm / mol K
T = temperature, Kelvin
n=moles=1.5
V=volumes = 30 L
T=temperature=285 K
The pressure :
[tex]\tt P=\dfrac{nRT}{V}\\\\n=\dfrac{1.5\times 0.082\times 285}{30}\\\\P=1.1685~atm[/tex]
is the scientific method is the end result of the scientific process?
Answer:
The right response will be "No".
Explanation:
Again after findings being collected, this same scientific method does not stop. The phase of the experience seems to be the compilation, examination, interpretation as well as the integration of information. The reasoning underneath research methodology has been the methodology which includes making the significance of the findings developers measured.Write correct formulas predict the products and balance the following.
Tin (IV) Sulfate + Ammonium Phosphate forms ?
What is the mass, in grams, of 122 atoms of aluminum? Round your answer to proper significant figures.
Answer:
Mass = 547.02 × 10⁻²³g
Explanation:
Given data:
Number of atoms of Al = 122 atom
Mass in gram = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
122 atom/6.022 × 10²³ atoms × 1 mol
20.26× 10⁻²³ mol
Mass in gram:
Mass = number of moles × molar mass
Mass = 20.26× 10⁻²³ mol × 27 g/mol
Mass = 547.02 × 10⁻²³g
A solution is classified as a weak base. Which of these could be the pH of the solution?
A)2
B)6
C)10
D)13
C
Pure water is at 7, and the bases are above 7 and the acids are below 7.
The pH of the solution that is classified as a weak base is 10. Details about weak bases can be found below.
What is pH?pH of a solution refers to the degree of acidity or alkalinity of that solution.
The pH scale reads from 1 - 14 where the following applies:
1 - 6 represents acidic solution7 represents neutral8 - 14 represents alkaline solutionA weak base will have a pH close to neutral, therefore, the pH of the solution that is classified as a weak base is 10.
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Is H2O+CO2 = H2CO3 a redox reaction? How?
Answer:
It is not an oxidation-reduction reaction. The formation of carbon dioxide and water are redox reactions which involve the oxidation of carbon and hydrogen respectively with oxygen being reduced in both the case.
Explanation:
This is not a redox reaction.
A redox reaction is the one that involves reduction and oxidation simultaneously. In a redox reaction, one of the substance gets oxidised and behaves as a reducing agent and the other gets reduced that behaves as an oxidizing agent.
The oxidation or reduction of the substance is decided by the change in oxidation number of the atom which is the charge that an atom appears to have on forming ionic bonds with other heteroatoms.
In this reaction, no change in oxidation state of the atoms takes place and thus this reaction is not a redox reaction.
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Please solve for Cu,N,and O an dif you can show how cause ik confused
Cu⇒ 1 atom
N⇒2 atoms
O⇒6 atoms
Total 9 atoms
Further explanationThe empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
Chemical formula : Cu(NO₃)₂
Number of Cu : 1
Number of N : 2
Number of O = 2 x 3 = 6
Total atoms in Cu(NO₃)₂ : 1 + 2 + 6 = 9
Please help!!! I don’t know
Answer:
4.06×10^23
Explanation:
1 mole has 6.023×10^23 molecules
0.675 moles have (6.023×10^23×0.675) molecules
What measurements have the same number of significant figures as the measured number
0.1060?
Answer: 0.3224, 7342, 54.32
Explanation:
0.1060 has 4 sig figs (1060 is 4 digits after the decimal point)
answers please!!!!!!
(a) HCL(aq) + NaOH(aq) ---------------> ___ + ____
The answer will be NaCl and H2O
(b) An equation to show the reaction between hydrogen ions and hydrogen ions and hydroxide ions is given below :
H+ + OH− ⇄ H2O
This reaction is known as neutralization reaction.
(c) Joey could tell us the reaction is over only when we obtained salt and water from the given chemical reaction (NaOH + HCl). This a basically a neutralization reaction ( the reaction generally finished at equilibrium)
(d) pH is 7.
This is because at the ending point the moles of HCl = the moles of NaOH so all that is present is H2O, Cl–, and Na+. So, the pH is 7.
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(HURRY 4. Which state of matter has a definite volume, but not a definite shape?
Liquid
solid
vapor
gas
Answer:
liquid
Explanation:
liquids can change shape based on what container they are in but they have a definite volume
Answer:
Liquid
Explanation:
A gas starts at a volume of 23 L and a pressure of 1.23 atm. What is the new pressure if you
change the volume to 15 L?
Answer:
1.89 atmExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{1.23 \times 23}{15} = \frac{28.29}{15} \\ = 1.886[/tex]
We have the final answer as
1.89 atmHope this helps you
In a chemical reaction, how do the reactants compare to the products?
Question 3 options:
A) They are different substances with different properties
B) They are the same
Answer:
A) They are different substances with different properties.
Explanation:
A chemical equation describes a chemical reaction. Reactants are starting materials and are written on the left-hand side of the equation. Products are the end result of the reaction and are written on the right-hand side of the equation.
So, A is correct.
(Also it said there were 3 options but only showed 2)
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Balance all the equations
1)Ferric chloride + Ammonium hydroxide Ferric hydroxide + Ammonium chloride
2) Aluminum + Hydrochloric acid Aluminium chloride + Hydrogen gas
Answer:
Balancing Chemical Equations
Balance the equations below:
1) __1__ N2 + __3__ H2 > _2__ NH3
2) __2__ KClO3 >⮴ __2__ KCl + __3__ O2
3) __2__ NaCl + __1__ F2 ⮴ __2__ NaF + __1__ Cl2
4) __2__ H2 + __1__ O2 ⮴ __2__ H2O
5) __1__ Pb(OH)2 + __2__ HCl ⮴ __2__ H2O + __1__ PbCl2
6)__2__ AlBr3 + __3__ K2SO4 ⮴ __6__ KBr + __1__ Al2(SO4)3
7) __1__ CH4 + __2__ O2 ⮴ __1__ CO2 + __2__ H2O
8) _1___ C3H8 + _5___ O2 ⮴ __3__ CO2 + __4__ H2O
9) __2__ C8H18 + __25__ O2 ⮴ __16__ CO2 + __18__ H2O
10) __1__ FeCl3 + __3__ NaOH ⮴ __1__ Fe(OH)3 + __3__NaCl
11) __4__ P + __5__O2 ⮴ __2__P2O5
12) __2__ Na + __2__ H2O ⮴ __2__ NaOH + __1__H2
13) __2__ Ag2O ⮴ __4__ Ag + __1__O2
14) __1__ S8 + __12__O2 ⮴ __8__ SO3
15) _6___ CO2 + _6___ H2O ⮴ __1__ C6H12O6 + __6__O2
16) ___1_ K + __1__ MgBr ⮴ __1__ KBr + __1__ Mg
17) __2__ HCl + __1__ CaCO3 ⮴ __1__ CaCl2 + __1__H2O + __1__ CO2
18) __1__ HNO3 + __1__ NaHCO3 ⮴ __1__ NaNO3 + __1__ H2O + _1___ CO2
19) _2___ H2O + __1__ O2 ⮴ __2__ H2O2
20) __2__ NaBr + __1__ CaF2 ⮴ __2__ NaF + __1__ CaBr2
Explanation:
How many phosphorus atoms are there in 1.75 mol of calcium phosphate,
Ca3(PO4)2
Answer:
It has 2 phosphorus atoms in 1 mol
so for 1.75 mol =2×1.75
Explanation:
need thanks and make me brainiest if it helps you
There will be two atoms of phosphorus in the 1.75 mol of calcium phosphate.
What are atoms?
Atoms are the smallest unit of matter. In a chemical reaction, the number of atoms shows the quantity of an element in the compound or reaction. Phosphorus is a chemical element that is preset in the periodic table.
In calcium phosphate, Ca3(PO4)2, the number of atoms can be calculated by counting the number of moles that is given in the equation.
The number of atoms of calcium is 3, and the number of phosphorus atoms is 2.
Now given the 1.75 mol of calcium phosphate, so the number of atoms of phosphorus will be the same in any number of moles of calcium phosphate. So there will be 2 atoms of phosphorus in the given equation.
Thus, the number of atoms is two.
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what is a polar zone
Answer:
polar zone - the part of the Earth's surface forming a cap over a pole; characterized by frigid climate. Frigid Zone, polar region. climatic zone - any of the geographical zones loosely divided according to prevailing climate and latitude.
Explanation:
The polar regions, also called the frigid zones, of Earth are the regions of the planet that surround its geographical poles, lying within the polar circles.
I have 1.8066 x 1024 atoms of Calcium, how many grams of calcium do I have?
Answer: 1849.9584
Explanation:
Question 4 (2 points)
Photosynthesis takes place in the nucleus of cells. (2 points)
O True
O False
false
Explanation:photosynthesis takes place inside an organelle called a chloroplast. For plants, chloroplast-containing cells exist in the mesophyll.
How many moles are required to react with 4.5 moles of H2?
N2 + 3 H2 ------> 2 NH3
Answer:
1.5 mol
Explanation:
Given data:
Number of moles of H₂ = 4.5 mol
Number of moles of N₂ = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of hydrogen and nitrogen.
H₂ : N₂
3 : 1
4.5 : 1/3×4.5 = 1.5 mol
Thus, 1.5 moles of nitrogen are required to react with hydrogen.
write word equation of carbon + oxygen ---> carbon dioxide
Answer:
Carbon + Oxygen = Carbon Dioxide
Explanation:
You already did
what is a covalent bond?
Answer:
A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Explanation:
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which need or want does this technology meet
Answer:
B. It allows people to rapidly heat items.
Explanation:
because it's a microwave...
Answer:
B. It allows people to rapidly heat items.
I am a bit skeptical about the radiation that allows microwaves to heat items so quickly though...
Explanation:
This is common sense, mate. Sorry to break it to you.
What letters in the middle of an element card represent?
How can you predict which element an atom is based on one of the two subatomic particles in the nucleus?
Which two of the three subatomic particles have an effect on the mass of an atom?
Answer:
I think it's the second answer
Why was there no reaction in some of the wells?
13. For a gas to become a liquid, large numbers of particles must clump
together. Particles clump together when the attraction between them
overcomes their
Answer: For a gas to become a liquid, large numbers of particles must clump together. Particles will clump together when the attraction between them overcomes their motion. For this to happen, energy must be removed from the gas to slow the particles down. So, condensation is an exothermic change.
Convert 34.5 oC into K. K = oC + 273.15 K
A 34.5 K
B 238.65 K
C 307.65 K
D 273.15 K
Conversion of 34.5 °C to K = C 307.65 K
Further explanationTemperature is one of the principal quantities that shows the degree of heat or cold from an object / space
Temperature is used as a guide to the level of heat energy from objects
Temperature measures thermal energy
The temperature conversion :
°F = (9/5) °C + 32
°R = (4/5) °C
°K = °C + 273 .15
34.5 °C into K
[tex]\tt 34.5+273.15=\boxed{\bold{307.65~K}}[/tex]
Answer:
Temperature is one of the principal quantities that shows the degree of heat or cold from an object / space
Temperature is used as a guide to the level of heat energy from objects
Temperature measures thermal energy
The temperature conversion :
°F = (9/5) °C + 32
°R = (4/5) °C
°K = °C + 273 .15
Explanation:
As the effective
nuclear charge is increased with the same amount of electron shielding,
A The valence electrons have a more negative potential energy, decreasing the amount of energy
required to remove them
B The valence electrons have a less negative potential energy, decreasing the amount of energy
required to remove them
c The valence electrons have a more negative potential energy, increasing the amount of energy
required to remove them
D The valence electrons have a less negative potential energy, increasing the amount of energy
required to remove them
What substance, if added to the mixture of salt and sand, could be separated from the mixture using a sieve
O sugar
O iron filings
O flour
O plastic beads
A 5 kilogram ball and a 10 kilogram ball are sitting on the edge of a wall. Which has more potential energy?
The 10 kilogram ball.
The 5 kilogram ball.
The have the same energy.
Answer:
The 10 kilogram ball
Explanation: