Many angiosperms rely on animals for
Metals bond with halogens to form colorless metal halides. During an experiment, chlorine water was added to a solution of potassium bromide. A record of the experiment is shown.
Experimental Record
Reactants Color of Reactants Color of Reactants after Mixing
cl,
Colorless solution
Deep yellow-orange colored solution is formed
KBT Colorless solution
Which of the following conclusions can be made about this chemical reaction based on the data? (1 point)
O Chlorine is more reactive than bromine.
Potassium bromide and chlorine do not react.
O Potassium metal is formed from a single replacement reaction.
O Bromine solution is colorless and is formed due to a single replacement reaction.
Answer:
O Chlorine is more reactive than bromine.
Explanation:
From this experiment we can conclude that chlorine is more reactive than bromine and it is the reason why the reaction is able to proceed.
The reaction is a single displacement reaction in which the position of an element in the activity series is very important. Since chlorine is more electronegative and highly reactive when compared to bromine, it will displace bromine from the solution of potassium bromide. So, we have product of potassium chloride and the bromide.What can you determine about an element if you only know its group number on the periodic table?
A. The total number of protons and neutrons
B. The number of protons
C. The total number of electrons
D. The number of valance elctrons
Answer:
c
Explanation:
how many atoms are in 2.45 moles of hydrogen
Answer:
There are 1.4754246675000002e+24 atoms of Hydrogen within the measurement of 2.45 moles of hydrogen!
Explanation:
Choose the statement below that correctly describes electrons.
a. Electrons have a positive charge and are lighter than protons
b. Electrons have a positive charge and are heavier than protons
c. Electrons have a negative charge and are heavier than protons
d. Electrons have a negative charge and are lighter than protons
Answer:
d. Electrons have a negative charge and are lighter than protons
Explanation:
The best statement that describes electrons is that electrons are negatively charged and are lighter than protons.
There are three known subatomic particles which are:
Protons which are the positively charged particles within an atom. Electrons are the negatively charged particles Neutrons do not carry any charges.The mass of the protons and neutrons are similar.
Electrons are lighter than both protons and neutrons.
4. When the mole fraction of solute is 1, there is
(a) a 1:1 ratio of solute to solvent.
(b) no solute present.
(c) only solute present.
(d) only solvent present.
(e) 1 mole of solute and 99 moles of solvent.
Answer:
(c) only solute present
Explanation:
In chemistry, the mole fraction, denoted by X, refers to the number of moles of a substance in a compound/mixture divided by the total number of substances in the same compound or mixture.
In this case, we can say that mole fraction represents the number of solutes to the number of solutes and solvent in the solution i.e. X = nA/nA + nB
Where; nA = number of solutes
nB = number of solvent
X = mole fraction.
Based on this analogy, When the mole fraction of solute is 1, there is only solute present. That is; X = 1 / 1 + 0
X = 1/1 = 1.
Why do you think there is a need for three layers in a film
Answer:
When our tear film becomes unstable, symptoms of Dry Eye can occur. OUR TEAR FILM HAS THREE LAYERS. Our tear film is made up of three layers – an oil (lipid) layer, a water (aqueous) layer and a mucin layer. ... Its main purpose is to seal the tear film which helps reduce evaporation of our natural tears.
What does the GOES acronym stand for?
A. Geological Open Engineering System
B. Geostationary Opertational Environmental Satellite
C. Grandma Only Eats Spagetti
Answer:
B. Geostationary Operational Environmental Satellite
Explanation:
Hope this helps!
Answer:
B
Explanation:
I’m studying it for you!
How would you find the average speed of a marathon runner throughout an entire race? A Divide the total distance the runner travelled by the total time they took to travel that distance B Divide the total time the runner it took the runner to travel that distance by the the total distance they travelled C Multiply the total distance the runner travelled by the total time they took to travel that distance D Multiply the total time the runner it took the runner to travel that distance by the the total distnace they travelled
Answer:
distance divided by time so A
Explanation:
a. 24 m x 3.26 m
b. 120 m x 0.10 m
c. 1.23 m x 2.0 m
d. 53.0 m x 1.53 m
PLEASE SHOW WORK
round answers with correct significant figure.
Answer: a) [tex]78.2m^2[/tex]
b) [tex]1.2\times 10m^2[/tex]
c) [tex]2.5m^2[/tex]
d) [tex]81.1m^2[/tex]
Explanation:
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
Rules for significant figures:
1. Digits from 1 to 9 are always significant and have infinite number of significant figures.
2. All non-zero numbers are always significant.
3. All zero’s between integers are always significant.
4. All zero’s preceding the first integers are never significant.
5. All zero’s after the decimal point are always significant.
The rule apply for the multiplication is :
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
a) [tex]24m\times 3.26m=78.2m^2[/tex]
b) [tex]120m\times 0.10m=1.2\times 10m^2[/tex]
c) [tex]1.23m\times 2.0m=2.5m^2[/tex]
d) [tex]53.0m\times 1.53m=81.1m^2[/tex]
A container with a volume of 893L contains how may moles of air at STP?
Answer:
i think 54
Explanation:
In the container with a volume of 893 liters, there are 39.9 moles of air at STP conditions.
We can find the number of moles with the Ideal gas law equation:
[tex] PV = nRT [/tex]
Where:
P: is the pressure = 1 atm (STP)
V: is the volume = 893 L
n: is the number of moles =?
R: is the gas constant = 0.082 L*atm/(K*mol)
T: is the temperature = 273 K
Hence, the number of moles is:
[tex] n = \frac{PV}{RT} = \frac{1 atm*893 L}{0.082 L*atm/(K*mol)*273 K} = 39.9 moles [/tex]
Therefore, there are 39.9 moles in the container.
You can find more about Ideal gas law here: https://brainly.com/question/4147359?referrer=searchResults
I hope it helps you!
What happens to a cell when it's in different environments?
What is the final temperature of the metal?
What is the temperature of the water?
What is the temperature change of the metal?
Answer: 29.8
Explanation:
PLZ HELP !!!!!
Which statement correctly describes the main difference between body waves and surface waves?
Select one:
Surface waves are only longitudinal waves and body waves are only transverse waves.
Surface waves only travel across oceans and body waves travel across the Earth’s crust.
Surface waves are less damaging to man-made structures than body waves.
Surface waves travel across the Earth’s surface and body waves travel through the Earth’s interior.
Surface waves travel across the Earth’s surface and body waves travel through the Earth’s interior.
there you go :)
What patterns do you notice between the three maps? Using the concepts
you've learned in this lesson, construct an explanation for these patterns in your
Science Notebook or in the space below.
Answer:
A spatial pattern is a perceptual structure, placement, or arrangement of objects on Earth. It also includes the space in between those objects. Patterns may be recognized because of their arrangement; maybe in a line or by a clustering of points.
Explanation:
The downward movement of water through pores and other spaces in soil due to gravity is called____
A Iniltration
B evaporation
C soakation
D seepage
Answer:
A Infiltration
Explanation:
The downward movement of water through pore spaces and other spaces in soil due to gravity is called infiltration.
Infiltration is greatly due to the force of gravity forcing water through pore spaces downward.
The ground water recharge is also impacted by this downward motion of water. In areas where the surface of the soil is covered with concrete, infiltration is not possible. Soil water content is due to the movement of water by infiltration.Which two factors are used to calculate the kinetic energy of an object?
Answer:
Mass and Velocity
Explanation:
hope this is the right answer might wrong tho
Answer:
its velocity and mass
Explanation:
I got it right on edg
What is the percent composition of nitrogen in N 2 O
Answer:
28 %
Explanation:
Mass mass N2O = 28 + 16 = 44 mass nitrogen = 2 x 14 = 28 % nitrogen Chemistry.
How many grams of zinc chloride will be produced from 55. grams of zinc assuming hydrochloric acid is available in excess
Answer:
Mass = 114.5 g
Explanation:
Given data:
Mass of zinc = 55 g
Mass of ZnCl₂ produced = ?
Solution:
Chemical equation:
Zn + 2HCl → ZnCl₂ + H₂
Number of moles of Zn:
Number of moles = mass/molar mass
Molar mass of Zn = 65.4 g/mol
Number of moles = 55 g/ 65.4 g/mol
Number of moles = 0.84 mol
Now we will compare the moles of Zn and zinc chloride,
Zn : ZnCl₂
1 : 1
0.84 : 0.84
Mass of ZnCl₂:
Mass = number of moles × molar mass
Molar mass of ZnCl₂= 136.3 g/mol
Mass = 0.84 mol × 136.3 g/mol
Mass = 114.5 g
3 reasons why aluminium is used in making of cooking vessels
Answer is : It is a good thermal and electrical conductor. -The main point to be noted is that aluminium is a highly reactive element and still it is used for making cooking utensils. The reason is that aluminium has a very high affinity for oxygen. So, it reacts with oxygen and forms a layer of aluminium oxide on its surface.
Answer:
This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide . This oxide layer is very stable and prevents further reaction of aluminium with oxygen . Also , it is light in weight and a good conductor of heat Hence , it is used to make cooking utensils .
Explanation:
Believe it
All atoms of oxygen have the same mass number. True or False
Answer:
pretty sure it's false
Explanation:
hope this helps!
How many particles are in 3.2 mole of neon gas
There are 1.93 x 10²⁴ particles
Further explanationGiven
3.2 moles of Neon gas
Required
Number of particles
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
So the number of particles for 3.2 moles :
N = 3.2 x 6.02.10²³
N = 1.93 x 10²⁴
or
we can describe it using Avogadro's number conversion factor
[tex]\tt 3.2~moles\times \dfrac{6.02\times 10^{23}}{1~mole}=1.93\times 10^{24}[/tex]
which of the following represents the greatest number of moles? please help! :)
Answer:
Helium
Explanation:
He- 3.99739969150064 (4)
S-0.498986433806336 (0.5)
Li-3.02550064832148 (3)
B-2.959948200906496 (3)
HELPPPPPPPPPP
IDENTIFY THE ELEMENT WHICH HAS A GREATER ATOMIC MASS FLOURINE OR CLOURINE
Answer:
Cu Copper 63.546
Cl Chlorine 35.453
F Fluorine 18.998403
Explanation:
I don't know whether you asked for Cu or Cl so answered it both.
What is it that lives if it is fed, and dies if you give it a drink
Answer:
fire
Explanation:
Answer:
ants if you splash a ant with sum water that shít is dead
4. Calculate the molar mass of Fe2(SO4)3. Then calculate the mass of iron(III) sulfate of 4.05X1023 formula units. Answer: __269g Fe2(SO4)3_
Answer:
399.88 [tex]\frac{4.05*10^{23} }{6.022*10^{23} }[/tex] =269
Explanation:
399.88 is the molar mass of iron(III) sulfate.
The mass of 4.05 × [tex]10^{23[/tex] formula units of Fe2(SO4)3 is approximately 6.48 × [tex]10^{25[/tex] grams.
Mass from formula unitsTo calculate the molar mass of Fe2(SO4)3, we need to determine the atomic masses of the individual elements involved and multiply them by their respective subscripts:
Fe: 55.845 g/mol (atomic mass of iron)S: 32.06 g/mol (atomic mass of sulfur)O: 16.00 g/mol (atomic mass of oxygen)Fe2(SO4)3 consists of 2 iron atoms, 3 sulfur atoms, and 12 oxygen atoms:
Molar mass of Fe2(SO4)3 = (2 * 55.845) + (3 * 32.06) + (12 * 16.00) = 159.69 g/mol
To calculate the mass of 4.05 × 10^23 formula units of Fe2(SO4)3, we can use the molar mass:
Mass = (4.05 × 10^23) * (159.69 g/mol) = 6.48 × 10^25 g
Rounded to two decimal places, the mass of 4.05 × [tex]10^{23[/tex] formula units of Fe2(SO4)3 is approximately 6.48 × [tex]10^{25[/tex] grams.
More on formula units can be found here: https://brainly.com/question/33740227
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A 15.33 g sample of magnesium oxide is found to contain 12.67 g of magnesium. What is the percent (by mass) composition of
the magnesium in the compound?
026 Ma
Answer:
Explanation:
I can help
Answer:
12.67g of Mg / 15.33g of MgO * 100% = 82.6% of Mg
Explanation:
A gas at 76 K is under a pressure of 78.4 kPa. If the temperature changes to 105 what will be the new
pressure?
Answer:
108.3kPa
Explanation:
Given parameters:
Initial temperature = 76k
Initial pressure = 78.4kPa
Final temperature = 105k
Unknown:
Final or new pressure = ?
Solution:
To solve this problem, we apply the combined gas law:
[tex]\frac{P_{1} }{T_{1} }[/tex] = [tex]\frac{P_{2} }{T_{2} }[/tex]
T1 = 76k
P1 = 78.4kPa
T2 = 105k
[tex]\frac{78.4}{76}[/tex] = [tex]\frac{P_{2} }{105}[/tex]
P2 = 108.3atm
I. define ionic bonding and describe how it can be formed between sodium and chlorine
ii. state 3 properties of the compound
III. what type of bonds is formed between two atoms of oxygen? describe how it formed
iv. state 3 properties of the substance in question (3) above
PLSSSS
2. How many atoms are in 5.6 moles of Na? Answer:___3.2 E 24 atoms of Na
Answer:
5.6[tex]\frac{6.02*10^{23} }{1}[/tex] = 3.4 X [tex]10^{24}[/tex]
Explanation:
the correct answer to it is 3.4 instead of 3.2. I got 3.4 from rounding it from 3.37.
The number of atoms in 5.6 moles of Na have been [tex]\rm \bold{3.37\;\times\;10^2^4}[/tex] atoms.
Atoms have been defined as the smallest unit of matter. The number of atoms in a mole of compound has been given by Avogadro law.
According to the Avogadro law, the number of atoms in mole of sample has been equal to the Avogadro number. The values of Avogadro number has been [tex]6.023\;\times\;10^2^3[/tex].
Computation for the atoms in NaThe available moles of Na have been 5.6 moles.
The number of atoms has been given by:
[tex]\rm 1\;mol=6.023\;\times\;10^2^3\;atoms\\ 5.6\;mol=5.6\;\times\;6.023\;\times\;10^2^3\;atoms\\ 5.6\;mol=3.37\;\times\;10^2^4\;atoms[/tex]
The number of atoms in 5.6 moles of Na have been [tex]\rm \bold{3.37\;\times\;10^2^4}[/tex] atoms.
Learn more about number of atoms, here:
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