Answer:
CaCl
2
Explanation:
As with all these problems, we assume a
100
⋅
g
of compound, and divide through by the ATOMIC masses of each component element:
Moles of calcium
=
36.1
⋅
g
40.08
⋅
g
⋅
mol
−
1
=
0.901
⋅
mol
.
Moles of chlorine
=
63.9
⋅
g
35.45
⋅
g
⋅
mol
−
1
=
1.802 mol
.
We divide each molar quantity through by the smallest molar quantity (that of calcium) to give an empirical formula of
CaCl 2
.
For ionic materials, we do not speak of the molecular formula, and the empirical formula is the formula we quote for reference.
The steps of preparing 2M solution of NaOH
Answer:
And 500 mL of 2M NaOH solution contains 80.02g NaOH=40.0 g of NaOH .
Explanation:
So, If we mix 40.0 g of NaOH with enough distilled water to make 500 mL, we will get a 2.00 M NaOH solution.
I hope this answers help you! :>What is the coldest temperature ever achieved?
Answer:
The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C
-273.144 degrees celsius. This is close to 'absolute zero', which is equal to -273.15 degrees celsius
Explanation:
Air movement and weather conditions are influenced by
A The Moon
B. Altitude
C. Thermal Energy
Answer:
The moon
Explanation:
The answer is A; Sorry i put the wrong answer by accident. I was trying to get to another question.
Give the answer below brainliest!!!
A. The moon influences the air movement
Identify the specific element that corresponds to each of the following electron configuration 1s2, 2s2, 2p6,3s2, 3p6
Explanation:
It's argon
As argon has atomic number 18 so it's configuration is
1s2, 2s2, 2p6,3s2, 3p6
Hope it will help :)❤
The given electron configuration 1s2, 2s2, 2p6, 3s2, 3p6 corresponds to the element argon (Ar).
Each number and letter in the electron configuration corresponds to a specific electron orbital and the number of electrons present in that orbital.
In this case, the electron configuration indicates that:
The first shell (n=1) has 2 electrons in the 1s orbital.
The second shell (n=2) has 2 electrons in the 2s orbital and 6 electrons in the 2p orbital.
The third shell (n=3) has 2 electrons in the 3s orbital and 6 electrons in the 3p orbital.
By adding up the total number of electrons (2 + 2 + 6 + 2 + 6), we find that the configuration represents 18 electrons. The element that has 18 electrons is argon, which has an atomic number of 18.
Therefore, the electron configuration 1s2, 2s2, 2p6, 3s2, 3p6 corresponds to the element argon (Ar).
Know more about argon:
https://brainly.com/question/12032224
#SPJ2
Which of the following statements describes a double displacement reactions?
Answer:
D
Explanation:
hope this helped and sorry if it didn't but I wish you luck:D
If g of chlorine gas occupies a volume of mL at a particular temperature and pressure, what volume will g of chlorine gas occupy under the same conditions
The complete question is as follows: If 1.04 g of chlorine gas occupies a volume of 872 mL at a particular temperature and pressure, what volume will 2.08 g of chlorine gas occupy under the same conditions ?
Answer: A volume of 1744 L will 2.08 g of chlorine gas occupy under the same conditions.
Explanation:
Given: [tex]Mass_1[/tex] = 1.04 g, [tex]V_{1}[/tex] = 872 mL
[tex]Mass_2[/tex] = 2.08 g, [tex]V_{2}[/tex] = ?
As molar mass of chlorine is 35.5 g/mol.
Number of moles is the mass of a substance divided by its molar mass.
Hence, moles of chlorine present in 1.04 g chlorine gas is calculated as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{1.04 g}{35.5 g/mol}\\= 0.029 mol[/tex]
Also, moles of chlorine present in 2.08 g chlorine gas is calculated as follows.
[tex]Moles = \frac{2.08 g}{35.5 g/mol}\\= 0.058 mol[/tex]
Formula used to calculate the volume occupied by 2.08 g of chlorine gas is as follows.
[tex]\frac{V_{1}}{n_{1}} = \frac{V_{2}}{n_{2}}[/tex]
Substitute the values into above formula as follows.
[tex]\frac{V_{1}}{n_{1}} = \frac{V_{2}}{n_{2}}\\\frac{872 L}{0.029 mol} = \frac{V_{2}}{0.058 mol}\\V_{2} = 1744 L[/tex]
Thus, we can conclude that a volume of 1744 L will 2.08 g of chlorine gas occupy under the same conditions.
The picture below shows a NASA image of the Oort cloud, a sphere of objects that are thought to surround Earth's solar system at a distance of up to one light-year from the Sun.
If the Oort cloud does exist, which of the following could explain why the objects in it may have formed this spherical shape?
A
They are held in orbits by the Sun's gravitational force.
B
They are held in Earth's solar system by Neptune's magnetic field.
C
They float freely in space because the Sun's gravitational force is too weak to hold them in orbit.
D
They are held in stationary positions around Earth's solar system by other stars in space.
The gravitational pull of the Sun keeps them in their orbits. The gravitational pull of the Sun and surrounding stars combined is most likely what gives the Oort cloud its spherical shape.
What does NASA's Oort Cloud mean?The Oort Cloud is a spherical layer of ice objects that is thought to be located between 2,000 and 100,000 astronomical units (AU) from our Sun, a star.
What makes it the Oort Cloud?The Oort cloud, so named after the Dutch astronomer Jan Oort who first confirmed its existence, is a collection of objects with a combined mass estimated to be 10-100 times that of Earth that are less than 100 km (60 miles) across and maybe trillions in number.
To know more about Oort cloud visit:-
https://brainly.com/question/23368033
#SPJ1
Which would make the greenhouse effect stronger?
O A. Adding oxygen gas to the atmosphere
O B. Decreasing greenhouse gas levels in the atmosphere
O C. Removing CO2 from the atmosphere
O D. Increasing the CO2 concentration in the atmosphere
Answer: D
Explanation:
Earth's ozone depleting substances trap heat in the air and warm the planet. The fundamental gases answerable for the nursery impact incorporate carbon dioxide, methane, nitrous oxide, and water fume (which all happen normally), and fluorinated gases (which are manufactured). The most mainstream ozone depleting substance is Water Vapor. The appropriate response is D.
The correct option for the given question about Green House Effect is Option D) Increasing the CO₂ concentration in the atmosphere.
What is Green House Effect?The greenhouse effect is the mechanism through which solar energy is absorbed by greenhouse gases rather than being reflected back into space. This keeps the earth's surface warm and keeps it from freezing.Fossil fuel combustion, deforestation, industrial waste disposal, global warming, pollution, and other factors are the main contributors to the greenhouse effect.What are the various Green House Gasses?Carbon dioxide, nitrous oxide, methane, water vapour, and fluorinated gases are the major Green House Gasses.Thus we can conclude that as CO₂ is a green house gas, the increase in concentration of CO₂ in the atmosphere will make the green house effect stronger.
Learn more about Green House Effect here:
https://brainly.com/question/19521661
#SPJ2
What are the coefficients that will balance the skeleton equation below?
N2 + H2 -> NH3
HELP HELP HELP
NH3 + NO + N2 + H2O
5. Given 8.25 x 1025molecules of ammonia, determine the number of grams of
nitrogen produced.
Answer:
4NH3+6NO+5N2+6H20
Explanation:
In the problems below, f(x) = log2x and g(x) = log10x. How are the graphs of f and g similar? Check all that apply. Both have a y-intercept of 1. Both increase from left to right. Both have an asymptote of x = 0. Both have a domain of all real numbers.
Answer:
The correct answers are: Both increase from left to right.
Both have an asymptote of x = 0.
Explanation:
Edge 2021.
The graphs of the functions f and g are similar in that;
Both graphs increase from left to right, (positive slope)Both have an asymptote of x= 0.Graph of logarithmic functionsBy convention, the graph of logarithmic functions which takes the form y = logx usually has an horizontally asymptote of x= 0.
Additionally, the graph of functions f and g have positive slopes. This is so because, the values of y increases with increasing value of x. O. this note, both graphs increase from left to right.
Read more on logarithmic functions;
https://brainly.com/question/4458071
How many of the planets have an orbital period of less than one Earth year?
Since orbital period depends on how far you are from the sun, planets closer to the sun have a orbital period less than one earth year.
These planets are Mercury and Venus
What is an example of a Low Energy-created depositional environment?
Answer:
River flood plains, swamps, lakes, lagoons, marshes, and offshore.
Explanation:
Slow-moving currents prevent coarse-grained sediment from migrating into low-energy depositional environments. Fine materials can be carried long distances before they can settle out in the absence of waves and currents.
1.00 x 10-7 moles to grams
What is the mole ratio of O2 to NH3?
A student dissolves 9.6g of styrene in of a solvent with a density of . The student notices that the volume of the solvent does not change when the styrene dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to significant digits.
Answer:
Molarity = 0.06 mol/L
Molality = 0.063
Explanation:
Complete question
A student dissolves 1.5g of styrene C8H8 in 225.mL of a solvent with a density of 1.02/gmL . The student notices that the volume of the solvent does not change when the styrene dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits
Solution
We must to know:
Molarity is equal to no. of moles divided by volume of solution
No. of moles = Mass/Molecular Mass
No. of moles of C8H8 = 1.5/104 = 0.0144
Molarity = 0.0144/225 = 0.06 mol/L
Molality = no. of moles / mass of solvent
Substituting the given values, we get -
Density = mass / V
Mass = density x V
1.02 * 225
= 229.5 g
Molality = 0.0144 / 229.5
0.063
orbital hauny dump bell shape is...
a Sorbital il p-orbital 1 ild-orbital pulf orbital
Answer: the orbital with a hauny dump bell shape is the p- orbital.
Explanation:
An orbital can be defined as part of the nucleus of an atom that consists of an electron of maximum given energy. The shape of this part gives the shape of the orbitals. There are different types of orbitals which include:
--> s-orbitals: This is the type of orbital in which the probability of finding electron is the same in all directions usually at a given distance form the nucleus. Therefore the s-orbitals are SPHERICAL in shape about the nucleus and are non- directional.
--> d-orbitals: This is said to have a clover shape. This is because the electron is pushed out four times during the rotation when an opposite spin proton aligns gluons with three spin-aligned protons.
--> p-orbitals: This is said to have a DUMP-BELL shape. This is because there are three similar p-orbitals which are arranged mutually at right angles to each other along x,y, and z axes. All the three p-orbitals are of the same energy level.
How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is
Answer:
79.1g of weak base must be combined with 56.0g of conjugate acid
Explanation:
that is 1.00 M in the weak base?
The weak base is C5H5N with a pKa of 5.17 (Ka=6.7×10-6)and a desire pH of 5.63
The equilibrium of the weak base is with the bromide salt of the conjugate acid is:
C5H5N(aq) + H2O(l) + Br- ⇄ C5H5NHBr(aq) + OH-(aq)
Where Kb = Kw / Ka = 1x10⁻¹⁴ / 6.7x10⁻⁶
Kb = 1.49x10⁻⁹ is defined as:
Kb = 1.49x10⁻⁹ = [C5H5NHBr] [OH-] / [C5H5N]
Where [OH-] = 10^-(14- pH) = 10^-(14- 5.63) = 4.255x10⁻⁹M
[C5H5N] = 1.00M
Replacing:
1.49x10⁻⁹ = [C5H5NHBr] [OH-] / [C5H5N]
1.49x10⁻⁹ = [C5H5NHBr] [4.255x10⁻⁹M] / [1.00M]
[C5H5NHBr] = 0.35M
In 1L the moles of C5H5NHBr are 0.35 moles
Mass C5H5NHBr: 160.0118g/mol
0.35 moles * (160.0118g / mol) =
56.0g of C5H5NHBr are necessaries
The mass of C5H5N is -79.1g/mol-:
1.00moles * (79.1g/mol) =
79.1g of C5H5N are necessariesHow many moles of RbNO2 are present in a sample with 3.4 x 1024 particles?
Answer:
5.6 mol
Explanation:
n = N/NA
n: number of moles
N: number of particles
NA: Avogadro's constant
n = 3.4×10²⁴/6.02×10²³ mol^-1 = 5.6 mol
Select three forms of non-renewable energy.
Biomass
Peat
Nuclear
Gas
Answer: Biomass, Nuclear and Gas are the three forms of non- renewable energy.
Explanation:
D‑Glucose and L‑glucose are
a. epimers.
b. enantiomers.
c. anomers.
d. diastereoisomers.
What does conserve mean?
How many grams of KNO3, are needed to create 675.0 mL with a concentration of 1.71 M
Answer:
Бардык белгилүү авиация мыйзамдарына ылайык, аары учуу мүмкүнчүлүгү жок. Канаттары өтө эле кичинекей, семиз денесин чече албайт. Албетте, аары баары бир учат. Себеби аарылар адам мүмкүн эмес деп эсептеген нерсеге маани бербейт.
Explanation:
Канаттары өтө эле кичинекей, семиз денесин чече албайт. Албетте, аары баары бир учат. Себеби аарылар адам мүмкүн эмес деп эсептеген нерсеге маани бербейт.
How many atoms are there in 1 mol of an element?
Answer:6.022x10^23
Explanation:
How many moles are in 150g of Li2O?
Answer:
moles= w/mm
moles=150/30
moles=5
A gas system has volume, moles and temperature of 1.52 L, 0.52 moles and 203K, respectively. What is the pressure in atm?
Answer:
P = 5.70 atm
Explanation:
Use PV = nRT
In this case, R = 0.0821 L·atm/mol·K (because we are finding the pressure in atm)P(1.52 L) = (0.52 moles)(0.0821)(203 K)
P = 5.701628947 atm
Which of the following limits a population's growth?
Answer: Limitations to population growth are either density-dependant or density-independent. Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size.
Explanation:
determine the mass fraction of iron in its compounds:
Please!
Answer:
Fe(NO₃)₃ = 0.23; FeCl₃ = 0.34
Explanation:
Mass fraction is defined as the ratio between the mass of iron in 1 mol of the compound and the mass of the complete compound.
In Fe(NO₃)₃ there is just 1 atom of Fe that has a molar mass of 55.845g/mol. The molar mass of this compound is 241.86g/mol. Thus, mass fraction is:
55.845g/mol / 241.86g/mol =
Fe(NO₃)₃ = 0.23In FeCl₃ there is 1 atom of Fe that has a molar mass of 55.845g/mol. The molar mass of this compound is 162.2g/mol. Thus, mass fraction is:
55.845g/mol / 162.2g/mol =
FeCl₃ = 0.341. (8pt) Using dimensional analysis convert 600.0 calories into kilojoules
2. (8pts) how much heat and kilojoules is needed to raise the temperature of 236 g of silver from 8.5°C to 34.9°C? (Cag = 0.24 J/g°C)
Answer:
1. 2.510kJ
2. Q = 1.5 kJ
Explanation:
Hello there!
In this case, according to the given information for this calorimetry problem, we can proceed as follows:
1. Here, we consider the following equivalence statement for converting from calories to joules and from joules to kilojoules:
[tex]1cal=4.184J\\\\1kJ=1000J[/tex]
Then, we perform the conversion as follows:
[tex]600.0cal*\frac{4.184J}{1cal}*\frac{1kJ}{1000J}=2.510kJ[/tex]
2. Here, we use the general heat equation:
[tex]Q=mC(T_2-T_1)[/tex]
And we plug in the given mass, specific heat and initial and final temperature to obtain:
[tex]Q=236g*0.24\frac{J}{g\°C} (34.9\°C-8.5\°C)\\\\Q=1495.3J*\frac{1kJ}{1000J} \\\\Q=1.5kJ[/tex]
Regards!
It is well-known that carbon dioxide, CO2, has a much greater density than air. In fact,
CO2 gas can displace air, which is why there are regulations in place that limit the
amount of dry ice allowed in elevators. In other words, do not get trapped in an
elevator, or any enclosed space, with someone who is transporting dry ice. Calculate
the pressure exerted by the CO2 gas, in atm, if the density was measured to be 1.983
g/L on a day where the temperature is 22.165 °C.
Answer: The pressure exerted by the [tex]CO_2[/tex] gas, in atm is 1.092
Explanation:
According to the ideal gas equation:'
[tex]PV=nRT[/tex]
P = Pressure of the gas = ?
V= Volume of the gas
T= Temperature of the gas = [tex]22.165^0C=(273+22.165)K=295.165K[/tex] (0°C = 273 K)
n= moles of gas = [tex]\frac{\text {given mass}}{\text {Molar mass}}[/tex]
R= Value of gas constant = 0.0821 Latm/K mol
[tex]P=\frac{mRT}{MV}[/tex] as [tex]Density=\frac{mass}{Volume}[/tex]
[tex]P=\frac{dRT}{M}[/tex] where d is density
[tex]P=\frac{1.983g/L\times 0.0821Latm/Kmol\times 295.165K}{44g/mol}=1.092atm[/tex]
Thus pressure exerted by the [tex]CO_2[/tex] gas, in atm is 1.092