Answer:
2KI(aq) + BaS(aq) = BaI2 + K2S
Explanation:
Kl(aq) + BaS(aq)
Thus is a reaction between Potassium Iodide and Barium Sulfide
The product will be Barium Iodide and potassium Sulfide.
2KI(aq) + BaS(aq) = BaI2 + K2S
Time: Continents Over Time View Hint Place all the images on the timeline before you click the "Check” button. If you get stuck, click on the "View Hint" button, and to start over, click on the "Reset Images" button. C o 225 million years ago 200 million years 135 million years 65 million years ago Today ago ago e Reset images Check Next Chapter: Plates & Boundaries Dunamic Earth Cita Man
Answer:
Explanation:
45
PLEASE HELP
What heat transfer is a Heater.
Answer:
All electric heaters make use of one or more of the fundamental heat transfer mechanisms – namely convection, conduction, or radiation.
For regular...
Conduction is heat transfer by direct contact, like frying an egg. Convection is heat transfer by the movement of gases or liquids, like most home furnaces, clothes dryers, or car heaters. Radiation is the transfer of heat in waves through space, like the sun or a fire.
which represents the balanced nuclear equation for the beta minus decay of Co-60?
₂₇⁶⁰Co ⇒ ₂₈⁶⁰Ni + ₋₁⁰e
Further explanationGiven
the beta minus decay of Co-60
Required
The reaction
Solution
Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,
alpha α particles ₂He⁴ beta β ₋₁e⁰ particles gamma particles ₀γ⁰ positron particles ₁e⁰ neutron ₀n¹Beta minus : ₋₁e⁰ particles
so the reaction :
Co-60 ⇒ X + beta minus
₂₇⁶⁰Co ⇒ X + ₋₁⁰e
In a nuclear decay reaction, the mass number and atomic number of the left (reactant / decayed) and right (product) sides will be the same
mass number = constant = 60
atomic number = 27 - (- 1) = 28
So the element X = ₂₈⁶⁰Ni
₂₇⁶⁰Co ⇒ ₂₈⁶⁰Ni + ₋₁⁰e
on a map directions are sometimes given by a symbol called a
Answer:
a compass rose
The average weather conditions affecting a biome is called ____.
precipitation
tundra
temperate condition
Climate
Balance the following reaction: _Na3PO4+_Ca(NO3)2-->_NaNO3+_Ca3(PO4)2
The balanced equation
2Na₃PO₄+3Ca(NO₃)₂⇒6NaNO₃+Ca₃(PO₄)₂
Further explanationGiven
Reaction
_Na3PO4+_Ca(NO3)2-->_NaNO3+_Ca3(PO4)2
Required
Balanced equation
Solution
Give a coefficient
aNa₃PO₄+bCa(NO₃)₂⇒cNaNO₃+Ca₃(PO₄)₂
Ca, left=b, right = 3⇒ b=3
P, left=a, right = 2⇒a=2
Na, left=3a, right=c⇒3a=c⇒3.2=c⇒c=6
The equation becomes :
2Na₃PO₄+3Ca(NO₃)₂⇒6NaNO₃+Ca₃(PO₄)₂
how many oxygen atoms are in 1 mol of CO2
Answer: 2 atoms
Explanation: A molecular formula of the compound carbon dioxide is CO 2 . One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of oxygen.
How many moles of iron (Fe) will be produced from 6.20 moles of carbon monoxide (CO) reacting with excess iron (III) oxide (Fe2O3)?
If you can, please show the work because I really don't understand and ya girl is struggling. thank you guysss <33
Answer:
4.13 moles of Fe
Explanation:
Step 1: Write the balanced equation
3 CO + Fe₂O₃ ⇒ 2 Fe + 3 CO₂
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of CO to Fe is 3:2.
Step 3: Calculate the moles of Fe formed from 6.20 moles of CO
We will use the previously established molar ratio.
6.20 mol CO × 2 mol Fe/3 mol CO = 4.13 mol Fe
Which of the following is not a chemical change?
a. paper being shredded
b. steel rusting
c. charcoal burning
d. a newspaper yellowing in the sun
Answer:
paper being shredded
Explanation:
Answer:
its A
Explanation:
What is the air we breathe composed of?
Answer:
oxygen
Explanation:
What is the percent composition of CaF2?
Answer:50%
Explanation:
I have it noted in my notes(had this question in a quiz)
Which of the following pairs of elements would most likely
undergo a violent reaction if combined with each other?
a
Fe and CI
b Cs and F
C Zn and S
d Kand o
Check it
GOT IT
Answer: cs and F
Explanation:
5. Identify each of the following as an element, a mixture, or a compound.
a. aluminum foil
b. air
C. water
d. salt water
e. copper
wire
f. steel
Answer:
Aluminum foil ~ element
Air ~ mixture
Water ~ compound
Salt Water ~ mixture
Copper Wire ~ element
Steel ~ element
when a liquid is cooled the kinetic energy of the particles a)decrease b) increase c) stay the same
Answer:
a) decrease
Explanation:
Hope this will help
typhoons come from warm waters in the ocean true or fales
Answer:
True
Explanation:
A typhoon forms when wind blows into areas of the ocean when the water is warm. These winds collect moisture and rise, while colder air moves in below. This creates pressure, which causes the winds to move very quickly. The wind rotates, or spin, around a center called an eye.
Besides mammals, name another group of organisms that primarily continues to care for their young after birth O birds O amphibians O reptiles O cnidarians
Answer:
I'm pretty sure it's birds or amphibians
Explanation:
chemical equation for cycloheptane (l)
Answer: C7H14 - PubChem.
Explanation:
Which part of the cell is the anode?
Х
Y
W
Z
Section
1
2
7)
Given the equation representing a reaction:
203Pb + 5921 TECn + on
3
4
5
Which type of reaction is represented by this equation?
6
A)
neutralization
8
-9
B)
polymerization
C)
substitution
10
11
12
13
= 14
- 15
16
-17
D)
transmutation
18
19
20
21
Answer:
a
Explanation:
neutalize acidity level
3)
What evidence indicates that the nuclei of strontium-90 atoms are unstable?
A)
Strontium-90 electrons are in the excited state.
B)
Strontium-90 electrons are in the ground state.
C)
Strontium-90 atoms spontaneously absorb beta particles.
D)
Strontium-90 atoms spontaneously emit beta particles.
Answer:
D) Strontium-90 atoms spontaneously emit beta particles.
Explanation:
The evidence that indicates that the nuclei of strontium - 90 atoms are unstable is that they spontaneously emit beta particles.
For every atomic nucleus, there is a specific proton to neutron ratio which ensures stability of the nucleus.
Any nucleus with a neutron/proton combination different from its stability ratio will be unstable and split into one or more other nuclei.
Strontium - 90 atoms are an example of this. To attain stability, they emit beta particles spontaneously.
8. The size and shape of an object are some of its....
Answer:
Characteristics...
Explanation:
I hope that's right, if not super sorry. I'm not the smartest. I tried my best if it's wrong
WILL GIVE BRAINLIEST
at which distance from refrigerator door would a magnetic force of attraction be weakest
A 7cm
B 3cm
C 1cm
D 10cm
Answer:
10 cm
Explanation:
because the magnetic force of attraction becomes weaker from a greater distance.
Answer:
D 10cm
Explanation:
As the distance between the two objects(magnet and Ferromagnetic Metals and Alloys) increases the magnetic for will decrease
if a iron nail is kept 1cm far from a magnet then the magnet will atract it easily but if the same iron nail is kep 3cm far from the magnet then the magnet won't attract it easily .
(Ferromagnetic materials such as iron, nickel and cobalt are attracted to magnets, as well as rare-earth metals like gadolinium, neodymium and samarium.)
Hope you've understood
What part of an atom is responsible for combing the atoms together (bonding) to form a new substance?
CuBr(s)⇄Cu+(aq)+Br−(aq)
Shown above is the chemical equation for the dissolution of the slightly soluble salt CuBr(s). Its Ksp value in pure water was experimentally determined. CuBr was found to be much less soluble in a 0.001MNaBr solution than in pure water. Which of the following correctly explains the decrease in solubility of CuBr in 0.001 M NaBr?
A.)The concentration of water is much less in the NaBr solution than in pure water, reducing the rate of dissolution of the salt.
B.)The presence of Na+ ions in the solution inhibits the dissolution of salts.
C.)The presence of additional Br− already in the solution decreases the value of the Ksp for CuBr , causing the solubility to decrease.
D.)The presence of additional Br− ions already in the solution means equilibrium will be reached when much less CuBr has dissolved.
Answer:
D) The presence of additional Br- ions already in the solution means equilibrium will be reached when much less CuBr has dissolved.
Explanation:
CuBr ⇄ [tex]Cu^+[/tex] + [tex]Br^-[/tex]
Because there is Br- in CuBr, when put into solution, those Br- ions become part of the products side of the equation, shifting the equilibrium back towards the CuBr side, meaning less CuBr will dissolve.
The decrease in the solubility of the CuBr in NaBr solution has been due to the presence of additional Br ions in the solution. Thus option C is correct.
The equilibrium position has been the condition when the concentration of the reactants and products has been equal. The solubility of the CuBr has been dependent on the ksp for the solution.
The ksp has been the solubility product and has been dependent on the concentration of the reactants. The NaBr solution will be dissociated in the form of Na ions and Br ions. The dissolution has been based on the equilibrium of the CuBr.
With the presence of additional Br ions, the equilibrium of the CuBr solution has been reached earlier, and thereby the solubility of the solution has been decreased.
The decrease in the solubility of the CuBr in NaBr solution has been due to the presence of additional Br ions in the solution. Thus option C is correct.
For more information about solubility, refer to the link;
https://brainly.com/question/4736767
Iodine gas in a container is heated over a flame. What happens to the average kinetic energy of the iodine particles
Answer:
Explanation: "As a sample of matter is continually cooled, the average kinetic energy of its particles decreases. Eventually, one would expect the particles to stop moving completely. Absolute zero is the temperature at which the motion of particles theoretically ceases"
Please help me i am very lost
Calculate the salinity of the liquids in the table. Round your answers to one decimal place.
$\frac{\text{mass of salt}\left(g\right)}{\text{mass of solution}\left(g\right)}\times1000=salinity\left(ppt\right)$mass of salt(g)mass of solution(g) ×1000=salinity(ppt)
Sample Solution Mass of Salt (g) Mass of Solution (g) Salinity (ppt)
A
27
1000
B
15
850
C
94
2355
D
11
3796
Answer:
i think that's number D.
53.0 g of silver (1) nitrate reacts according to the reaction shown below:
AgNO3 + KCI — AGCI + KNO3
Find the theoretical yield of AgCl. If the amount of AgCl actually produced is 38.5 grams,
what is the percent yield of the experiment?
Answer:
Percent yield = 86.09%
Theoretical yield of AgCl = 44.72 g
Explanation:
Given data:
Mass of silver(1) nitrate = 53.0 g
Actual yield of AgCl = 38.5 g
Theoretical yield of AgCl = ?
Percent yield = ?
Solution:
Chemical equation:
AgNO₃ + KCl → AgCl + KNO₃
Number of moles of AgNO₃:
Number of moles = mass/molar mass
Number of moles = 53.0 g/ 169.87 g/mol
Number of moles = 0.312 mol
now we will compare the moles of AgNO₃ and AgCl
AgNO₃ : AgCl
1 : 1
0.312 : 0.312
Theoretical yield of AgCl:
Mass = number of moles × molar mass
Mass = 0.312 mol × 143.32 g/mol
Mass = 44.72 g
Percent yield:
Percent yield = (actual yield / theoretical yield) × 100
Percent yield = ( 38.5 g / 44.72 g ) × 100
Percent yield = 86.09%
Why can a solution be classified as a mixture?
Both are always homogeneous.
It is made up of only one substance.
Both are made up of two substances that are not chemically combined.
Both are made up of two substances that are chemically combined.
Answer:
Both are made up of two substances that are not chemically combined.
Explanation:
Solutions can be classified as a mixture because both are made up of two substances that are not chemically combined.
A mixture is made up of the following properties:
They have an indefinite composition. Their constituents retain their physical properties. They can easily be separated into their physical constituents.Solutions share this property with all mixtures.
The constituent of a solution are not chemically combined or bonded together
Answer:
c
Explanation:
I go to k12 (or you) If you go to k12 this is correct
How often is Earth's surface being changed?
1 every hundred years
2 never
3 at all times
4 once a year
Answer:
I believe it is 3.
Explanation:
because the earth is constantly shifting.
the mass of 0.0321 moles of Ca (CN)2
The mass of Ca(CN)2 : 92,11 g/mol
Further explanationGiven
0.0321 moles of Ca(CN)2
Required
The mass
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
mol(n) = mass(m) : MW(molecular weight)
Input the value :
mass = mol x MW Ca (CN)2
mass = 0.0321 x 92,11 g/mol
mass = 2.957 g