give the result of the following expression with the correct number of significant figures
[tex]84 \frac{m}{s} \times 32.533s[/tex]
PLEASE HELP ME
How many grams of lithium are needed to produce 45 Og of lithium nitride, according to the following process? 6 Li(s) + N2(g) → 2 Li3N(s)
correct name for PtO.
Answer:
It may stand for 'Paid Time Off'
Explanation:
I need more context but that's probably it.
Answer:
gracias
Explanation:
Intermolecular forces exist between what?
Answer:
Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.
Explanation:
HELP I NEED THIS NOW AND FAST PLEASE
Stainless steel's ability to resist rust is a _____ property
Answer:
corrosion resistance.
Explanation:
In summary, stainless steel does not rust because it is sufficiently reactive to protect itself from further attack by forming a passive corrosion product layer. (Other important metals such as titanium and aluminum also rely on passive film formation for their corrosion resistance.)
Need help I don’t understand this at all need to show my work and strategy it’s stoichiometry gram to gram please help
Answer:
781×10¯² g of MgCl₂.
Explanation:
The balanced equation for the reaction is given below:
Mg + 2HCl —> MgCl₂ + H₂
Next, we shall determine the mass of HCl that reacted and the mass of MgCl₂ produced from the balanced equation. This is illustrated below:
Molar mass of HCl = 1 + 35.5
= 36.5 g/mol
Mass of HCl from the balanced equation = 2 × 36.5 = 73 g
Molar mass of MgCl₂ = 24 + (35.5×2)
= 24 + 71
= 95 g/mol
Mass of MgCl₂ from the balanced equation = 1 × 95 = 95 g
SUMMARY:
From the balanced equation above,
73 g of HCl reacted to produce 95 g of MgCl₂.
Finally, we shall determine the mass of MgCl₂ produced by the reaction of 6 g of HCl. This can be obtained as follow:
From the balanced equation above,
73 g of HCl reacted to produce 95 g of MgCl₂.
Therefore, 6 g of HCl will react to produce = (6 × 95)/73 = 781×10¯² g of MgCl₂.
Thus, 781×10¯² g of MgCl₂ were obtained from the reaction.
Why is nitro group called an ambident group?
Answer:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Explanation:
Explanation:
An ambident ("both teeth") group is a group that can attach to another by either of two atoms. A nitro group can bond through either N or O. In organic chemistry, this property gives rise to functional group isomers.
Hope this is fine for you☺️☺️☺️What is the Molar Mass of Iron(Fe)? and also state how many particles there are in one mole of iron.
Please put them in order for 15 points
Answer:
I forgot that but I think boron is first d ff\
Explanation:
Select the correct answer
Which hand is negatively charged?
Option B is the correct answer .
What is Charge ?
Charge is a basic property of matter that is associated with the presence or absence of electrons. Objects can have positive or negative charge, or they can be neutral, which means they have an equal number of positive and negative charges. In physics, charge is one of the fundamental concepts used to explain the behavior of matter and energy in the universe. The interaction between charges is described by Coulomb's law, which states that the force between two charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.
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Elements with the same number of electron shells are in the same
Answer:
Elements with the same number of electrons in their outermost shell show similar chemical properties. Example 1: Fluorine, chlorine, bromine, and iodine each have 7 electrons in their outermost shell. These so-called halogens are also quite similar in their chemical behavior.
which metals take part in chemical reactions when exposed to the air?
Answer:
sodium metal take part when exposed to air
If 4.50 moles of HNO3 are used, how many moles of copper (II) nitrate are produced?
Answer:
2.25 moles of Cu(NO₃)₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
Cu + 2HNO₃ —> Cu(NO₃)₂ + H₂
From the balanced equation above,
2 moles of HNO₃ reacted to produce 1 mole of Cu(NO₃)₂.
Finally, we shall determine the number of mole of Cu(NO₃)₂ produced by the reaction of 4.5 moles of HNO₃. This can be obtained as follow:
From the balanced equation above,
2 moles of HNO₃ reacted to produce 1 mole of Cu(NO₃)₂.
Therefore, 4.5 moles of HNO₃ will react to produce = 2.25 moles of Cu(NO₃)₂.
Thus, 2.25 moles of Cu(NO₃)₂ were obtained from the reaction.
The scientific method
A.is a recipe for doing science
B.will always give the right answer
C.is a systematic approach to the study of phenomena
D.involves preconceived ideas
Answer:
A. Is a recipe for soing science
Explanation:
A scientific method is a procedure for conducting science experiments, its almost like a recipe for a science experiment.
I need the blanks filled. This is Comp chem and I need it fast.
Use the information in the table to identify the metal
with a volume of 1.38 cm3.
O aluminum
O zinc
O chromium
O nickel
Answer:zinc
Explanation:
Argon has three naturally-occurring isotopes: 99.6% of 40Ar, with an atomic weight of 39.9624 amu, 0.337% of 36Ar, with an atomic weight of 35.9676 amu, and 0.063% of 38Ar, with an atomic weight of 37.9627 amu. Calculate the average atomic weight of Ar. Round off the answer to six significant figures. Do not include the units.
Answer:
39.9477amu is the average atomic weight of Argon
Explanation:
The average atomic weight is defined as the sum of the products of the atomic weight of each isotope times its abundance. For the Argon the average atomic weight, X is:
[tex]X = 0.996*^{40}Ar + 0.00337*^{36}Ar+0.00063*^{38}Ar[/tex]
[tex]X = 0.996*39.9624amu + 0.00337*35.9676amu+0.00063*37.9627amu[/tex]
X = 39.9477amu is the average atomic weight of Argon
A certain reaction with an activation energy of 185 kJ/mol was run at 505 K and again at 525 K . What is the ratio of f at the higher temperature to f at the lower temperature
Answer:
The ratio of f at the higher temperature to f at the lower temperature is 5.356
Explanation:
Given;
activation energy, Ea = 185 kJ/mol = 185,000 J/mol
final temperature, T₂ = 525 K
initial temperature, T₁ = 505 k
Apply Arrhenius equation;
[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ][/tex]
Where;
[tex]\frac{f_2}{f_1}[/tex] is the ratio of f at the higher temperature to f at the lower temperature
R is gas constant = 8.314 J/mole.K
[tex]Log(\frac{f_2}{f_1} ) = \frac{E_a}{2.303 \times R} [\frac{1}{T_1} -\frac{1}{T_2} ]\\\\Log(\frac{f_2}{f_1} ) = \frac{185,000}{2.303 \times 8.314} [\frac{1}{505} -\frac{1}{525} ]\\\\Log(\frac{f_2}{f_1} ) = 0.7289\\\\\frac{f_2}{f_1} = 10^{0.7289}\\\\\frac{f_2}{f_1} = 5.356[/tex]
Therefore, the ratio of f at the higher temperature to f at the lower temperature is 5.356
True or False: The ocean is an example of a carbon reservoir (carbon sink).
True
False
Answer:
A TRUEEEEEEEE
Explanation:
I need help please on chemistry
What is the purpose of the sojourner rover ????
Answer:
Sojourner is the Mars Pathfinder robotic Mars rover that landed on July 4, 1997 in the Ares Vallis region, and explored Mars for around three months. It has front and rear cameras and hardware to conduct several scientific experiments.
Explanation:
How many molecules of ammonia are contained in 10.4 moles of ammonia, NH3?
How is wave technology used in medical field ?
Plz answer ASAP thank you
If it takes 3.5 hours for the Hogwarts Express, moving at a speed of 120 mi/hr, to it make it from Platform
9 and ¾ to Hogwarts, how far apart are they?
Answer:
3/4 miles
Expanation:Because 9+3/4 is 3/4 miles
Using the equation below, how many liters of water can be made from 7.6 L of oxygen gas at STP?
Answer:
V = 15.2 L
Explanation:
STP means that T = 273 K and P = 1 atm.
We use the PV=nRT equation to convert the given liters of oxygen to moles:
1 atm * 7.6 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 273 Kn = 0.340 molNow we convert O₂ moles to H₂O moles, using the stoichiometric coefficients of the equation:
0.340 mol O₂ * [tex]\frac{2molH_2O}{1molO_2}[/tex] = 0.68 mol H₂OFinally we use the PV=nRT equation once again to convert 0.68 moles of H₂O to liters:
1 atm * V = 0.68 * 0.082 atm·L·mol⁻¹·K⁻¹ * 273 KV = 15.2 LWhich are characteristics of electromagnetic waves? Check all that apply.
travel in straight lines and can bounce off surfaces
travel through space at the speed of light
travel only through matter
travel only through space
can bend around objects
move by particles bumping into each other
move by the interaction between an electric field and a magnetic field
The characteristics of electromagnetic waves are that they travel in straight lines and can bounce off surfaces,travel through space at speed of light,can bend around objects,move by interaction between electric field and magnetic field.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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Which of the following is a type of kinetic energy.
A. A television playing.
B. Magnets stuck to each other.
C. A car parked at the top of a hill.
D. A rolling ball.
Answer:
a rolling ball
Explanation:
kinetic energy is movement energy
A proposed mechanism for one of the pathways for the destruction of ozone in the atmosphere is: step 1: O3 NO NO2 O2 step 2: NO2 O NO O2 (a) Identify the molecularity of each step in the mechanism. step 1 _________ step 2 _________ (b) Write the equation for the net reaction. Use the smallest integer coefficients possible. If a box is not needed, leave it blank.
Answer:
See explanation
Explanation:
The destruction of ozone is a non-elementary reaction. This means that it does not take place in a single reactive encounter. The reaction rather takes place is a sequence of steps called the reaction mechanism.
We can see that in the overall reaction, ozone is reduced to ordinary oxygen thus the ozone layer is depleted by this reaction. It is a two step reaction as shown.
Both steps (1) and (2) are bimolecular. The equation of the net reaction is shown in the image attached.
What is the formula for tin (II) nitrite?
Answer:
tin nitrite Formula:Sn(NO2)2
The formula for tin (II) nitrite Sn(NO2)2.
What is Molecular formula?Two atoms together chemically form a molecule. The chemical formula for a molecular compound's molecular formula lists the variety of atoms that make up the molecule.
A subscript under oxygen in CO2, for instance, indicates that there are two oxygen atoms present, but a subscript under carbon indicates that there is just one carbon atom present.
A nitronium salt is produced when tin(IV) nitrate and trifluoroacetic acid anhydride combine. Trifluoroacetic acid produces a similar molecule when it is solvated with it.
The number of each atom contained in a given molecule is indicated by the molecule's molecular formula. In essence, it is a list of the elements that are present in a molecule and how many of each there are.
Therefore, The formula for tin (II) nitrite Sn(NO2)2.
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Calculate the change in temperature of a 650. g sample of water that loses 5480. J of energy
Answer:
2
Explanation:
1) the formula of the energy is:
E=cm*Δt, where E - the value of the energy (5480 J.), c - the specific heat capacity (4200 J/(kg*C)), Δt - the difference between initial temperature and the final one (it is unknown);
2) if to perform the substitution of the values 'E', 'm' and 'c' into the formula above, then
5480=4200*0.65*Δt;
3) to calculate Δt:
Δt=5480/4200/0.65≈2 (°C).
note: the initial temperature is higher than the final.