Here, we are required to determine what types of atoms are present in the simplest chemical substance.
The simplest chemical substances are composed of only the atoms of one kind of Element.Chemical substances are generally classified as either;
ElementsCompoundsMixtures.Definition of terms;
Elements and Compounds are collectively termed Pure Substances.
Elements: An element is a chemical substance that is composed of a specific kind of atom and cannot be broken down or transformed by means of a chemical reaction.Elements: An element is a chemical substance that is composed of a specific kind of atom and cannot be broken down or transformed by means of a chemical reaction.Compound: A compound is a chemical substance formed by the combination of two or more elements or group of elements by means of a chemical reaction.Elements: An element is a chemical substance that is composed of a specific kind of atom and cannot be broken down or transformed by means of a chemical reaction.Compound: A compound is a chemical substance formed by the combination of two or more elements or group of elements by means of a chemical reaction.Mixture: A mixture put simply is a chemical substance that consists of diverse, nonbonded elements, molecules or compounds as the case may be.Therefore, inference drawn from the premises above point to the fact that the simplest chemical substances are composed of the atoms of one type of element.
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Hello, could someone help me with this?
Answer:
c. bigger planets have more gravity and smaller planets have less gravity. i hope this helped :))
A molten sample of 1.00kg of iron with a specific heat of 0.385J/g.K at 1000.K is immersed in a sample of water. If the water absorbs 270 kJ of heat what is the final temperature of the iron?
I need all the process.
Answer:
298. 7 K.
Explanation:
Hello!
In this case, since equation we use to compute the heat in a cooling or heating process is:
[tex]Q=mC(T_f-T_i)[/tex]
Whereas we are given the heat, mass, specific heat and initial temperature. Thus, we infer that we need to solve for the final temperature just as shown below:
[tex]T_f=T_i+\frac{Q}{mC}\\\\T_f=1000 K+\frac{-270000J}{1000g*0.385\frac{J}{g*K} } \\\\T_f=298.7 K[/tex]
It is important to notice that the iron release heat as water absorbs it, that is why it is taken negative.
Best regards!
Pls give a detailed explanation about what are enzyme mutations
Answer:
Enzyme mutations can lead to serious or fatal human disorders and are the consequence of inherited abnormalities in the affected individual's DNA. The mutation may be at a specific position in an enzyme encoded by a mutated gene, just like a single abnormal amino acid residue.
Explanation:
How many molecules of NaOH are there in 22 moles?
Answer:
i hope my answer help u :))
Explanation:
no , it will be 39.99711
Predict how many H1 NMR signals (individual resonances, not counting splitting) are expected for the compound.
Answer:
3 H1 NMR signals
Explanation:
NB: kindly check the diagram of the chemical compound in the attached picture.
This particular Question is based on the part of chemistry which is known as spectroscopy. Spectroscopy is used in the Determination or in identifying chemical compounds. H'NMR works on the principle of nuclear magnetic resonance.
In order to solve this question, one has to count the number of hydrogen in unique location. The diagram in the attached show how hydrogen is been counted.
The numbers of signals is the number of different chemical environments in which hydrogen atoms are located.
NB: signals is also the same as peak in H'NMR.
Hence, the number of H1 NMR signals in this chemical compound is 3.
What is the mass of 4.67 mol of Sulfuric Acid (H2SO4)
458 g H₂SO₄
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
4.67 mol H₂SO₄
Step 2: Identify Conversions
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of S - 32.07 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of H₂SO₄ - 2(1.01) + 32.07 + 4(16.00) = 98.09 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 4.67 \ mol \ H_2SO_4(\frac{98.09 \ g \ H_2SO_4}{1 \ mol \ H_2SO_4})[/tex]Multiply/Divide: [tex]\displaystyle 458.08 \ g \ H_2SO_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
458.08 g H₂SO₄ ≈ 458 g H₂SO₄
What is the energy of an electron in the third energy level of hydrogen?
Answer:
Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy.
...
Energy Levels of Electrons.
Energy Level Energy
1 -13.6 eV
2 -3.4 eV
3 -1.51 eV
4 -.85 eV
Binary compounds are formed by ............... ............... elements.
Answer: i think its A diatomic compound..
Explanation: hope i helped! sorry if im wrong!
2. What is the difference between an investigation and a demonstration?
Answer:
An investigation is about collecting information, while an experiment is testing something based off an investigation
Explanation:
Hope this helps
An experiment tests something based on an investigation, whereas an investigation pertains to gathering knowledge.
What are an investigation and a demonstration?The operation of something is demonstrated. There are independent and dependent variables in an experiment. The control of variables distinguishes an experiment from a demonstration. Add an independent as well as a dependent variable to the project in order to convert a demonstration into an experiment.
An information resource's value to a particular professional group and its influence on the procedures and results of healthcare are just a few of the problems that demonstration studies address. An experiment tests something based on an investigation, whereas an investigation pertains to gathering knowledge.
Therefore, an experiment tests something based on an investigation, whereas an investigation pertains to gathering knowledge.
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A compound has an empirical formula of PO2 and a molar mass of 126 g/mol. What
is the molecular formula of the molecule?
Answer:
P₂O₄
Explanation:
From the question given above, the following data were obtained:
Empirical formula = PO₂
Molar mass of compound = 126 g/mol
Molecular formula =.?
The molecular formula of the compound can be obtained as illustrated below:
Molecular formula = [Empirical]ₙ
= molar mass
[PO₂] × n = 126
[31 + (16× 2)] × n = 126
[31 + 32] × n = 126
63 × n = 126
Divide both side by 63
n = 126 / 63
n = 2
Molecular formula = [PO₂]ₙ
Molecular formula = [PO₂]₂
Molecular formula = P₂O₄
Open the Molecule Shapes interactive and select Real Molecules. Check the box to Show Bond Angles. Classify each molecule by whether its real bond angles are the same as or different than its model (ideal) bond angles. In other words, do the bond angles change when you switch between Real and Model mode at the top of the page? Same (angles do not change) Different (angles change) Answer Bank H0 00, 50, XP, BF, CIF, NH, CH, SP, XF, BF, PCI, SF,
Answer:
Same bond angle-CO2, CH4, SF6, PCl5, BF3, BeF2, XeF4,XeF2
Different bond angle- H2O, SO2, NH3, ClF3,SF4
Explanation:
We know that the shape of molecules and and bond angles between atoms in molecules are predicted on the basis of the valence shell electron pair repulsion theory.
Most times, certain molecules deviate from the expected bond angles for different reasons. The most common reason is the presence of lone pairs on the molecule. This is the case in the molecules; H2O, SO2, NH3, ClF3 and SF4.
However, in XeF4 and XeF2, the lone pairs orient themselves in such a way that they do not distort the expected bond angle. For instance, in XeF2, the three lone pairs occupy equatorial positions while the two bond pairs occupy apical positions. In XeF4, the bond pairs are directed at the corners of a square while the two lone pairs are positioned above and below the plane of the square.
What are the components of the system that influence its motion? *
Answer:
Motion control systems are any system that control one or more of the following of a machine: its position, velocity, force, and/or pressure. They generally consist of the follow components: Motion controller: the central part that operates the system (I.e. the brain)
Which of the following elements has the largest atomic radius?
A. Ba
B.F
C. Ga
D. P
Answer:
A. Ba
Explanation:
Atomic radius increases as you go down and decreases as you go right.
Consider the following chemical equilibrium:
N2 (g) + 3H2 ⇌ 2NH3
Now write an equation below that shows how to calculate Kp from Kc for this reaction at an absolute temperature .
Answer:
Kp = Kc (RT) ^(-2)
Explanation:
For the reaction;
N2 (g) + 3H2 ⇄ 2NH3(g)
We can write;
Kc = [NH3]^2/[N2] [H2]^3
But
Kp = pNH3^2/pN2 . PH2^3
To convert from Kc to Kp
Kp = Kc (RT) ^Δn
where Δn is the change in number of moles going from reactants
to products.
For this reaction;
Δn = 2- (3+1) = -2
Kp = Kc (RT) ^(-2)
Calculate the kinetic energy of an electron ejected from a piece of sodium (Φ = 4.41x10–19 J) that is illuminated with 265 nm light.
in Joules
Answer:
Explanation:
Energy of falling radiation having wavelength of 265 nm
= h c / λ where h is plank's constant , c is velocity of light and λ is wavelength of radiation . Putting the values
Energy of light photon = 6.6 x 10⁻³⁴ x 3 x 10⁸ / 265 x 10⁻⁹
= .0747 x 10⁻¹⁷
= 7.47 x 10⁻¹⁹ J .
Work function of sodium is 4.41 x 10⁻¹⁹
So kinetic energy of ejected electron = energy of falling photon - work function
= 7.47 x 10⁻¹⁹ - 4.41 x 10⁻¹⁹
= 3.06 x 10⁻¹⁹ eV .
Applying a force can make an electron shift from one atom to another causing what?
18. What is one of the three things that cause the surface currents of the oceans?
A.differences in salinity
B.temperature differences
C. density differences
D. Coriolis effect
Answer:
b. temperature difference
Molecular formula of a compound with an empirical formula c5h6 and a molar mass of 132.21
Answer:C10H12
Explanation:
Given :empirical formula =C5H6
molar mass of carbon =12 g /mole approximately
molar mass of hydrogen =1.01g/mole approximately
molar mass of C5H6=(5*12)+(6*1.01)=66.06 g/moles
132.21/66.06=2 approximately
therefore ,the answer is C10H12
I HOPE IT HELPS !!
In Purdue's Chemistry department, the chemists have found that in a water based solution containing 1616 grams of certain undissolved chemicals, the rate of change of the amount of chemicals dissolved in the solution is proportional to the amount of the undissolved chemicals. Let Q(t)Q(t) (in grams) be the amount of dissolved chemicals at time tt and let kk be the positive proportionality constant. The differential equation describing the given situation is:
Answer:
The differential equation describing the given situation is dQ/dt = k( 16 - Q )
Explanation:
Given the data in the question;
Initially, the water based solution contains 16 grams of undissolved chemicals;
Assume Q(t) is the amount of dissolved chemical at time L
then the amount of undissolved chemicals at time t is ( 16 - Q)
The rate of change of amount of chemicals dissolved in the solution is proportional to the amount of undissolved chemicals
this means;
dQ/dt ∝ ( 16 - Q)
dQ/dt = k( 16 - Q )
where k is the positive proportionality constant.
Therefore, The differential equation describing the given situation is dQ/dt = k( 16 - Q )
Can somebody PLEASE tell me the empirical formula for br2o6
Answer:
BrO3
Explanation:
The empirical formula is the smallest whole-number ratio, you find the greatest common factor (which is 2, in this case), then divide the subscripts by it.
So:
Br2 / 2 = Br1
O6 / 2 = O3
It pulls everything down towards earth
How many grams of water at 0 degree c can be frozen into ice at zero degree c if 55 kj of heat is removed
Answer:
what is that's a question
According to specific heat capacity, 13.09 grams of water at 0 degree Celsius can be frozen into ice at zero degree c if 55 kJ of heat is removed.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT, substitution in formula gives Q/c=m which is m= 55/4.2=13.09 grams.
Thus, 13.09 grams of water at 0 degree Celsius can be frozen into ice at zero degree c if 55 kJ of heat is removed.
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Correct formula for aluminum oxide
Answer:
Formula for aluminum oxide Al₂O₃
Explanation:
Hope that helps
Answer:
Al2O3, ionic
Explanation:
how many grams of water produced if we react 3 moles of hydrogen with 3 moles of oxygen
Can anyone help me? Plsss
What is the molecular formula of the molecule that has an empirical formula of C2H40 and a molar mass of 176.21 g/mol?
Type your answer using the following format:
CuCl2 for CuCl2.
Answer:
C8H16O4
Explanation:
C2H4O= 24+4+16
44
n=molar mass/empirical formula
n=176.21/44
=4
Therefore
Molar Formula= (C2H4O)4=C8H16O4
Given 450.98 g of Cu(NO3)2, how many moles of Ag can be made? Provide your final answer rounded to two decimal places.
Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag
Answer:
4.82 moles of Ag.
Explanation:
We'll begin by calculating the number of mole in 450.98 g of Cu(NO₃)₂. This can be obtained as follow:
Molar mass of Cu(NO₃)₂ = 63.5 + 2[14 + (16×3)]
= 63.5 + 2[14 + 48]
= 63.5 + 2[62]
= 63.5 + 124
= 187.5 g/mol
Mass of Cu(NO₃)₂ = 450.98 g
Mole of Cu(NO₃)₂ =?
Mole = mass /Molar mass
Mole of Cu(NO₃)₂ = 450.98 / 187.5
Mole of Cu(NO₃)₂ = 2.41 moles
Next, we shall determine the number of mole of Cu needed to produce 450.98 g (i.e 2.41 moles) of Cu(NO₃)₂. This can be obtained as follow:
Cu + 2AgNO₃ —> Cu(NO₃)₂ + 2Ag
From the balanced equation above,
1 mole of Cu reacted to produce 1 mole of Cu(NO₃)₂.
Therefore, 2.41 moles of Cu will also react to produce 2.41 moles of Cu(NO₃)₂.
Thus, 2.41 moles of Cu is needed for the reaction.
Finally, we shall determine the number of mole of Ag produced from the reaction. This can be obtained as follow:
From the balanced equation above,
1 mole of Cu reacted to produce 2 moles of Ag.
Therefore, 2.41 moles of Cu will react to produce = 2× 2.41 = 4.82 moles of Ag.
Thus, 4.82 moles of Ag were obtained from the reaction.
What kind of intermolecular forces act between a hydrogen cyanide (HCN) molecule and a carbon monoxide molecule?
Answer:
Dispersion forces
Dipole-Dipole interaction
Explanation:
The London dispersion force refers to the temporary attractive force that acts between the electrons in two adjacent atoms when the atoms develop temporary dipoles. Dispersion forces act between any two molecules even when other intermolecular forces are in operation as long as the molecules are in close proximity to each other.
Now, CO is polar and the HCN is also polar molecule. Hence, dipole - dipole interaction forces are also in operation and acts between the two molecules in close proximity to each other.
Dispersion forces and Dipole-Dipole interaction are intermolecular forces which act between a hydrogen cyanide (HCN) molecule and a carbon monoxide molecule
The transitory attractive force that exists between the electrons in two nearby atoms when the atoms form transient dipoles is known as the London dispersion force. As long as the molecules are close to one another, dispersion forces can exist between any two molecules, even when other intermolecular forces are active.
The HCN molecule and CO are both polar molecules right now. As a result, dipole-dipole interaction forces act between the two molecules when they are close to one another.
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From where do the placenta and umbilical cord develop?
Answer:
it develops from the womb
Answer:
outer cells of the blastocyst
Explanation:
on edg:)
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The percent composition of an unknown substance is 75.42% Carbon, 6.63 % Hydrogen,
8.38 % Nitrogen, and 9.57 % Oxygen. If its molar mass is 334.0 g/mol what is its empirical and
molecular formula?
The empirical and molecular formula : C₂₁H₂₂N₂O₂
Further explanationGiven
The percent composition of an unknown substance is 75.42% Carbon, 6.63 % Hydrogen, 8.38 % Nitrogen, and 9.57 % Oxygen
Required
The empirical and molecular formula
Solution
C : 75.42 : 12 = 6.285
H : 6.63 : 1 = 6.63
N : 8.38 : 14 = 0.599
O : 9.57 : 16 = 0.598
Divide by 0.598
C : H : N : O = 10.5 : 11 : 1 : 1 = 21 : 22 : 2 : 2
The empirical formula : C₂₁H₂₂N₂O₂
(C₂₁H₂₂N₂O₂)n = 334
(334)n=334
n = 1