Answer:
2.71×10²⁴ particles
Explanation:
Applying Avogadro's constant
Avogadro's constant states that, The number of specified particles contained in a mole of a substance is equal to 6.02×10²³.
From the question,
If one mole of chlorine contains a particle of 6.02×10²³,
Therefore,
4.5 moles of chlorine will contain a particle of (4.5× 6.02×10²³)
⇒ 27.09×10²³
Hence the number of particle contained in 4.5 moles of chlorine ≈ 2.71×10²⁴ particles
rsy-feiu-xad j0in only girlś
Answer:
nahhhhhhhhhhhhhhhhhhhhhhh xD
have a good day :)
Explanation:
WHY ONLY GIRLS? maybe find something better to do. so disgusting.
(NEED HELP ASAP) Which statement best describes a key difference between a solar and lunar eclipse?
A.
During a lunar eclipse, the moon passes through Earth’s shadow; during a solar eclipse, the moon's shadow moves across Earth.
B.
During a lunar eclipse, the moon’s shadow falls on Earth’s surface; during a solar eclipse, the moon passes through Earth’s shadow.
C.
Solar eclipses happen once every ten years while lunar eclipses occur with every new moon.
D.
Solar eclipses occur with every new moon while lunar eclipses happen every five to six years.
Answer:
a
Explanation:
cual es la fuerza de atraccion entre dos cargas de 6 μC y -8μC si estan separadas a 15 cm
Answer:
CHupapi muyeyo auhuguahugu
Explanation:
PLEASE HELP!
20 grams of a radioactive substance has a half life of 30 days
how much will be left after 150 days?
-1.25g
-2.50g
-0.63g
-0.31g
Answer: 0,63 g
Explanation: During 150 days 5 decays happen. You can write a set
of masses : 20 g ⇒ 10 g after first decay, then 5 g , 2.5 g , 1,25 g
and after fifth decay 0.63 g
In which location would a free neutron from a decaying U-235 atom be most likely to cause another atom to split?
there you go. giving answers to most questions on the chem test (10th grade)
Answer:
The appropriate option would be B . Explanation: This is due to the reason enriched U has insignificant polluting influences. Along these lines, the U -235 particles focuses together and the possibilty of high energy neutron bombarding another Uranium -235 molecule in the region is high.
Explanation:
Answer:
thank u so much for the answers ! !! How do u get the answers???
Explanation:
[check out their questions for the answers guys chem final]
which element dissolves readily in water to form an alkaline solution?
pls help
Answer:
An alkaline solution can be formed when a metal oxide is dissolved in water. An acidic solution can be formed when a non-metal oxide is dissolved in water. For example, magnesium oxide dissolves to form alkaline solutions.
In what way is psychology connected to the natural sciences and different than other social sciences?
a. It explores the influences of society on individuals and their behavior.
b. It explores the influences of society on group behavior.
c. It explores biological explanations for human behavior.
d. It proved that human behavior is the result of biology
what is the atomic radius of sulfur?
Answer:
16
Explanation:
Atomic mass: 32.065 u
Electrons per shell: 2,8,6
Symbol: S
How do Leeuwenhoek's observations of animalcules compare to Hooke's observations of cells in the cork?
Answer:
Both observe little creature.
Explanation:
Leeuwenhoek's observations of animalcules is similar to Hooke's observations of cells in the cork because both used microscope to see little creature. There is also a difference between both scientist's observation because one observe living creature and the other observe non-living thing. Leeuwenhoek observe protists in the pond which he named animalcules while on the other hand, Hooke observe the cell wall in cork tissue.
Pls hurry
Light is the fastest known entity in our universe.
O True
O False
Mark this and return
Save and Exit
Answer:
True
Explanation:
Answer:
true
Explanation:
source(s): trust me bro
How much heat is released when 233 grams of water at room temperature (25C) is frozen into ice at -15C?
Answer: The amount of heat released when 233 grams of water at room temperature (25C) is frozen into ice at -15C is 17253.65 J.
Explanation:
As water converts into ice at [tex]0^{o}C[/tex]. So, the change in temperature is taking place from [tex]25^{o}C[/tex] to [tex]0^{o}C[/tex] and then from [tex]0^{o}C[/tex] to [tex]-15^{o}C[/tex].
So, amount of heat released by water is as follows.
[tex]q_{1} = m \times C \times (T_{2} - T_{1})\\= 233 g \times 4.18 J/g^{o}C \times (25 - 0)^{o}C\\= 24348.5 J[/tex]
m = mass of substance
C = specific heat of water = [tex]4.18 J/g^{o}C[/tex]
[tex]C'[/tex] = specific heat of ice = [tex]2.03 J/g^{o}C[/tex]
The amount of heat released by ice is as follows.
[tex]q_{2} = m \times C' \times (T'_{2} - T'_{1})\\= 233 g \times 2.03 J/g^{o}C \times (-15 - 0)^{o}C\\= -7094.85[/tex]
Now, total heat released during this change is as follows.
[tex]\Delta H = q_{1} + q_{2}\\= 24348.5 J + (-7094.85) J\\= 17253.65 J[/tex]
Thus, we can conclude that heat released when 233 grams of water at room temperature (25C) is frozen into ice at -15C is 17253.65 J.
1.
At constant pressure. 50 milliliters (mL) of a gas
at 20°C is heated to 30° C. The new volume of
the gas in milliliters (ml) is equal
Answer:
[tex]\boxed {\boxed {\sf V_2=75 \ mL}}[/tex]
Explanation:
Since the pressure is constant, the only variables we need to work with are temperature and volume. We will use Charles's Law, which states the volume of a gas is directly proportional to the temperature. The formula is:
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
Originally, the gas was 50 milliliters at 20 degrees celsius. Substitute these values into the left side of the equation.
[tex]\frac{50 \ mL}{20 \textdegree C}=\frac{ V_2}{T_2}[/tex]
We don't know the volume of the new gas, but we know the temperature was changed to 30 degrees celsius.
[tex]\frac{50 \ mL}{20 \textdegree C}=\frac{ V_2}{30 \textdegree C}[/tex]
Since we are solving for the new volume, we must isolate the variable. It is being divided by 30 °Cand the inverse of division is muliplication. Multiply both sides by 30 °C.
[tex]30 \textdegree C*\frac{50 \ mL}{20 \textdegree C}=\frac{ V_2}{30 \textdegree C}* 30 \textdegree C[/tex]
[tex]30 \textdegree C*\frac{50 \ mL}{20 \textdegree C}= V_2[/tex]
The units of degrees celsius cancel, so we are left with milliliters as the units.
[tex]30*\frac{50 \ mL}{20}= V_2[/tex]
[tex]\frac{1500 \ mL}{20}= V_2[/tex]
[tex]75 \ mL=V_2[/tex]
The new volume of the gas is 75 milliliters.
A child receives a balloon filled with 47 L of helium from a vendor at an amusement park. The temperature outside is 320 K. What will the volume of the balloon be when the child brings it home to an air-conditioned house at 295 K? Assume that the pressure stays the same. Answer in units of L.
Answer:
43.3 L
Explanation:
Applying,
V/T = V'/T'................... Equation 1
Where V = Initial volume of the ball0on, T = Initial temperature of the balloon, V' = Final volume of the balloon, T' = Final Temperature of the balloon.
make V' the subject of the equation
V' = VT'/T................ Equation 2
From the question,
Given: V = 47 L, T = 320 K, T' = 295 K
Substitute these values into equation 2
V' = (47×295)/320
V' = 43.3 L
Which is NOT a characteristic of mixture Help please
A. Elements in a mixture are combined without creating a chemical reaction
B. Each substance in a mixture retains its own chemical identity
C. A chemical change occurs within a mixture
D. Two or more elements are combined with one another
Answer:
Its C let me know if its wrong!
what is the proper formulanGaseous Butane (C4H10) that reacts with Gaseous Oxygen (O2) in a combustion reaction to form Carbon dioxide Gas and Gaseous Water (Dihydrogen monoxide).
Answer:
2C₄H₁₀(g) + 13O₂(g) —> 8CO₂(g) + 10H₂O(g)
Explanation:
The balanced equation for the reaction between butane and oxygen to produce carbon dioxide and water can be written as follow:
C₄H₁₀ + O₂ —> CO₂ + H₂O
Next, we shall balanced the equation. This is illustrated below:
C₄H₁₀ + O₂ —> CO₂ + H₂O
There are 4 atoms of C on the left side and 1 atom on the right side. It can be balance by writing 4 before CO₂ as shown below:
C₄H₁₀ + O₂ —> 4CO₂ + H₂O
There are 10 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 5 before H₂O as shown below:
C₄H₁₀ + O₂ —> 4CO₂ + 5H₂O
There are 2 atoms of O on the left side and a total of 13 atoms on the right side. It can be balance by writing 13/2 before O₂ as shown below:
C₄H₁₀ + 13/2O₂ —> 4CO₂ + 5H₂O
Multiply through by 2 to express in whole number ratio.
2C₄H₁₀(g) + 13O₂(g) —> 8CO₂(g) + 10H₂O(g)
Thus, the equation is balanced.
help please this is a major grade (my birthday is next week) if i dont pass i wont celebrate my birthday please help!
Answer:
The answer to the question is C
Which is a possible excited state configuration for Nitrogen?
A. 1-5-2
B. 2-5
C. 1-6
D. 2-5-1
A certain kind of fish in the ocean eats only algae a seal Easter fish then a bear eats the seal when the bear dies, it is recycled by bacteria. The second consumer in this scenario is the.
Answer:
The seal
Explanation:
This question depicts a typical food chain, which is the linear relationship that shows the transfer of energy from one organism to another. Every food chain consists of organism in trophic levels. One organism in each trophic level. The food chain starts with a PRIMARY PRODUCER, which is the algae in this case.
The fish is the PRIMARY CONSUMER because it feeds directly on the algae (producer). The secondary consumer is the SEAL, which feeds on the fish. The summarized food chain is as follows;
Algae → Fish → Seal → Bear → Bacteria
How will nuclear fusion change as the sun ages?
Answer:
It won't be good.
Explanation:
In the core of the sun, hydrogen is produced by nuclear fusion. when the sun ages, it starts to run out of the hydrogen. when it runs out, nuclear fusion can't generate heat, and then the sun expands, becoming a red giant.
What did the Fish and Wildlife Service (FWS) do to bring back black-footed ferrets from extinction?
The FWS moved mating pairs from the Wyoming population to over 8 western states and Mexico to begin new colonies.
The captive breeding program was implemented too late to save the black-footed ferret.
The FWS monitored a Wyoming population and captured enough individuals to start new populations.
The FWS use a captive breeding program to start populations in 8 states.
Answer:
The FWS use a captive breeding program to start populations in 8 states
Explanation:
I just took a quiz and got this answer right.
Answer:
The FWS use a captive breeding program to start populations in 8 states
Explanation:
How does the difference in air pressure masses affect wind speed? When low air pressure and high air pressure masses are far apart, air moves quickly from low to high pressure areas. When low air pressure and high air pressure masses are far apart, air moves quickly from high to low pressure areas. When low air pressure and high air pressure masses are close together, air moves quickly from high pressure to low pressure areas. When low air pressure and high air pressure masses are close together, air moves quickly from low to high pressure areas; this creates stronger wind speeds.
Answer:
it is from the currents the movements cause
Explanation:
Answer:The greater the difference in pressure, the faster the winds. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure. When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure.
Explanation:
Gravity on Earth is 9.8 m/s2, and gravity on the Moon is 1.6 m/s2.
So, if the mass of an object on Earth is 40 kilograms, its mass on the Moon is
kilograms and its weight on the Moon is
newtons.
Reset Next
Answer: Mass is 40 kg, weight is 64 N
Explanation: Mass is same everywhere, weight G = mg, it depends on acceleration of gravity
8.) If 396 g of Carbon Dioxide (CO2) are produced, what mass of Oxygen
(02) reacted? *
Answer:
264g
Explanation:
C + O2 -> CO2
_g + _g -> 396g
396÷3=132
C (132g) + O2 (264g) -> CO2 (396g)
Imagine that you meet with the team of scientists who assembled the graphs in part B. What questions would you ask the team about the data presented?
Answer:
They made this graphics, how they measured the gas and how this affected the climate change horribly.
They created these images to show how the gas was measured and how the climate change was adversely affected the greenhouse gases.
What is greenhouse gases?A greenhouse gas is a gas that produces the greenhouse effect by both absorbing and emitting radiant energy at thermal infrared wavelengths. The five main greenhouse gases in the atmosphere of Earth are ozone, carbon dioxide, methane, and water vapor.
The gases that trap heat in the earth's atmosphere are referred to as greenhouse gases. The earth's surface warms during the day when the light beams through the atmosphere.
The earth's surface cools at night, redistributing heat into the atmosphere. However, part of the heat is captured by the atmosphere's greenhouse gases.
Therefore, how the climate change was adversely impacted the greenhouse gases must ask the team.
Learn more about greenhouse gases, here:
https://brainly.com/question/13093450
#SPJ2
If I have 0.070 moles of gas at a pressure of 0.20 atm and at a temperature of 8.00°C,
what is the volume of the container that the gas is in?
Answer:
PV=nRT
0.20×v = 0.070×8.00
0.20V= 0.56
0.20v÷0.20v = 0.56÷0.20v
= 2.8
AlBr3 + K2SO4à KBr + Al2(SO4)3
What are the two reactants in this chemical reaction?
a
AlBr3
b
KBr
c
Al2(SO4)3
d
K2SO4
How many moles of PCl5 can be produced from 53.0 g of Cl2 (and excess P4)?
Express your answer to three significant figures and include the appropriate units.
Answer:
0.299 moles of PCl5
Explanation:
First form an equation based of given information: P4 + Cl2= 4PCl5
Next balance it: P4 + 10Cl2 = 4PCl5
Take your given value (53.0g of Cl2) and divide it by its molar mass to get moles of Cl2: 53.0g/70.906g = 0.747 moles Cl2
Then, multiply by the molar ratio (10Cl2 to 4PCl5): (0.747 x 4 mol PCl5)/10 mol Cl2 = 0.299 moles PCl5
I really need help please.
NaOH + AlCl3 --> Al(OH)3 + NaCI.
How many grams of AlCl3 are needed to produce 100.0 g NaCl?
Answer:
Grams of AlCl₃ ~ 80 grams (1 sig. fig.)
Explanation:
Write and balance given equation.
Coefficients should be in smallest whole number ratios. => called ‘The Standard Equation’ and is assumed to be at 0˚C & 1atm. pressure.
3NaOH + AlCl₃ => Al(OH)₃ + 3NaCI
Write below compound what’s given and what’s needed, i.e., to be calculated.
Rxn: 3NaOH + AlCl₃ => Al(OH)₃ + 3NaCI
Given: --------- (?g) -------- 100.0g
Rxn Moles: 3 moles 1 mole 1 mole 3 moles
Calc’d Moles: --------- (? Moles) -------- 100.0g/58g∙molˉ¹
= 1.724 mol NaCl
Calculate moles AlCl₃ needed using mole ratios:
(? moles AlCl₃/1 mole AlCl₃) = (1.724 moles NaCl/3 moles NaCl)
=> ? moles AlCl₃ = (1.724 moles NaCl x 1 mole AlCl₃) / (3 moles NaCl)
=> ? moles AlCl₃ = (1.724 x 1 / 3) mole AlCl₃ = 0.575 mole AlCl₃ needed
Convert moles AlCl₃ needed to grams AlCl₃ needed:
Grams AlCl₃ needed = calculated moles AlCl₃ x formula wt. AlCl₃
= 0.575 mole AlCl₃ x 133.34 grams AlCl₃/mole AlCl₃
= 76.6705 grams AlCl₃ needed (calculated answer)
Express answer in appropriate number of sig. figs.
Number of sig. figs. for answer = the given measured data having the least number of sig. figs.In this case, grams of NaCl = 100.0 grams (measured data) contains only 1 sig. fig. (Do not use conversion factors or universal constants)Therefore the final answer => Grams of AlCl₃ ~ 80 grams (1 sig. fig.)What are the parts of the glowstick? What are the chemicals inside?
Which statement best explains what causes the phase change from solid ice to liquid water?
a.Heat is released as ice turns into liquid water.
b.The mass increases when ice turns into liquid water.
c.Heat is absorbed as ice turns into liquid water.
d.The hydrogen bonds prevent the absorption of heat.