Answer:
collection
Explanation:
after vacuum filtration 9.84 grams of potassium alum product was obtained. This means that the actual yield of potassium alum is 6.98 grams. Calculate the percent yield of this process using your theoretical yield from #7
Answer:
70.9% or 71% yield
Explanation:
actual yield/theoretical yield * 100% = % yield
6.98/9.84 * 100 = 70.9
How are infrared visible light and ultraviolet Ray's related.
Answer:
Infrared radiation has longer waves than red light, and thus oscillates at a lower frequency and carries less energy. Ultraviolet radiation has shorter waves than blue or violet light, and thus oscillates more rapidly and carries more energy per photon than visible light does.
Explanation:
Which element would react most like calcium (Ca)?
A. O
B. Ti
C. C
D. Mg
Answer:
B/Ti
Explanation:
Answer:mg D
Explanation:A P E X
A patient cholesterol level and blood measures 149 mg/dL. What is the patients cholesterol level in grams per liter?
Answer:
fasting blood work
Explanation:
edge 2022
The molar mass of the hydrated sodium sulfate is 322.1 g/mole. What is the formula of the hydrate salt?
Answer:
Na₂SO₄·10H₂O.
Explanation:
Hello.
In this case, since the anhydrous sodium sulfate is:
[tex]Na_2SO_4[/tex]
Whose molar mass is:
[tex]M=23+32+16*4=142 g/mol[/tex]
But the total hydrate's molar mass is 322.1 g/mol, we can compute the mass of water:
[tex]m_{water}=322.1-142=180.1g/mol[/tex]
Thus, the molecules of water are found by diving the total mass of water by the mass of one mole of water:
[tex]#water=\frac{180.1}{18}=10[/tex]
It means, that the formula is Na₂SO₄·10H₂O.
Best regards.
The pretend element, knoxium, Kx, has the following composition:
164Kx, 164.08 amu (60.44%)
165Kx, 165.11 amu (13.55%)
169Kx, 168.92 amu (??????%)
What is the average atomic mass of the "knoxium"?
164.08amu
165.48amu
166.04 amu
Answer:
165.48 amu
Explanation:
First, you need to find the last percentage.
100% = 60.44% + 13.55% + x
100% = 73.99% + x
x = 26.01%
Now, multiply each mass by the respective percentage.
164.08 × 0.6044 = 99.17
165.11 × 0.1355 = 22.37
168.92 × 0.2601 = 43.94
Lastly, add the products together to find the average atomic mass.
99.17 + 22.37 + 43.94 = 165.48
The average atomic mass of "knoxium" is 165.48 amu
The mass and volume of a body are 4.
4.237kg and
2.5cm 3
respectively. What is the density
Explanation:
p=mv
=(4.237)(2.5x10^-2)^3
=6.6x10^-5 kgm-3
state the bond angle and the molecular shape of NH3 and H2O.
Answer:
H2O forms a bent structure due to the presence of 2 lone pairs over O Atom. This makes the bond angle 104.5° NH3 forms a pyramidal structure due to presence of 1 lone pair. This makes the bond angle 107°
Enter an equation for the formation of Al2O3(s) from its
elements in their standard states.
Express your answer as a chemical equation including
phases.
The compound, solid Al2O3, is formed from solid aluminum and oxygen gas under certain conditions.
Formation of Al2O3Solid aluminium oxide, Al2O3, is formed from its components elements as follows:
2Al (s) + 3O2 (g) ----------> 2Al2O3 (s)
The state of the aluminum element is solid, that of oxygen is gas, and that of the product, Al2O3, is solid.
More on Al2O3 can be found here: https://brainly.com/question/25873251
HURRY
Show step-by-step
Pure copper may be produced by the reaction of copper (I) sulfide with oxygen gas:
Cu2S (s) + O2 (g) --> 2Cu (s) + SO2 (g)
If 3-kg of copper (I) sulfide reacts with excess oxygen, what mass of copper metal may be produced??
If 3-kg of copper (I) sulfide reacts with excess oxygen, 3.9 kg of copper metal may be produced.
Let's consider the following balanced equation for the obtaining of pure copper.
Cu₂S(s) + O₂(g) ⇒ 2 Cu(s) + SO₂(g)
The molar mass of Cu₂S is 95.61 g/mol. The moles corresponding to 3 kg (3000 g) of Cu₂S are:
[tex]3000 g \times \frac{1mol}{95.61g} = 31 mol[/tex]
The molar ratio of Cu₂S to Cu is 1:2. The moles of Cu obtained from 31 moles of Cu₂S are:
[tex]31 mol Cu_2S \times \frac{2molCu}{1molCu_2S} =62 mol Cu[/tex]
The molar mass of Cu is 63.55 g/mol. The mass corresponding to 62 moles of Cu is:
[tex]62 mol \times \frac{63.55g}{mol} = 3.9 \times 10^{3} g = 3.9 kg[/tex]
If 3-kg of copper (I) sulfide reacts with excess oxygen, 3.9 kg of copper metal may be produced.
You can learn more about stoichiometry here: https://brainly.com/question/22288091
Use Dot and cross method to show the bonding of the atoms and state the number of atoms of each element present
a. Magnesium and Fluorine
b. Sodium and Fluorine
c. Sodium and Oxygen
d. Aluminum and Iodine
Answer:
Check the attached one..I only draw the Dot method of Magnesium and Fluorine.. since i love chemistry ..Hope this helps you...Balance you have to do it yourself..If you didn't get the answer let me know in the comments..But you have try okay..
what would lead to a higher final temperature of water, a metal with a low heat capacity of a high heat capacity
A hot metal with a low heat capacity will raise the final temperature of water more than a hot metal with high heat capacity.
Heat capacityIt is the amount of heat required to change the temperature of a substance by just a unit.
Substances that heat up quickly are said to have low heat capacities while those that take time to heat up are said to have high heat capacities.
Substances with low heat capacity also release their thermal energy quicker than those with high heat capacity.
Thus, a hot metal with low heat capacity will readily transfer its thermal energy to water than a hot metal with high heat capacity.
More on heat capacities can be found here: https://brainly.com/question/11194034
Electron Identify the type of charge of the following particles in an
atom
Electron
Neutron
Proton
Answer:
Electron charge: -1
Neutron charge: 0
Proton charge: +1
Methane and Sulfur react to produce carbon disulfide and hydrogen sulfide. what is the balanced equation?
Answer:
CH₄ +2S₂ → CS₂ +2H₂S
Explanation:
1. How many moles are in 3.01 x 1023 atoms of calcium?
Answer:
.5 moles of calcium
Explanation:
We want to find the number of moles in 3.01 x 10^23 atoms of calcium
To convert atoms to moles, we simply divide the given number of atoms by Avogadro's number , 6.022 x 10^23
Given number of atoms : 3.01 x 10^23
Number of moles : 3.01 x 10^23 / 6.022 x 10^23 = .5 moles of calcium ( rounded )
a sample of sodium reacts completely with 0.142 kg chlorine, forming 234 g of sodium chloride. What mass of sodium reacted
Sue dissolved a certain amount of salt in 400 grams of water to obtain 405 grams of salt solution. What was the mass of the salt used to make the solution? 5 grams 10 grams 400 grams 405 grams
Explanation:
Sue added salt to water in order to make a salt solution
the original amount of water is 400 grams
In order for Sue to obtain 405 grams of salt solution using 400 grams of water, 5 grams of salt must be added.
Answer: (D) 5 grams
Explanation: the reason I would chose this is because if you do the simple math of 405-400 you get 5 so if he has 400 in the beginning he would have to add something to make it 405 grams and that something would have to be 5 grams of salt. hoped this helped no need for brainiest just happy to help.:)
and please tell me if I am wrong.
A class does a science experiment. They rub a balloon with a piece of wool. They put the balloon close to a penny and pleces of tissue paper.
They find that the tissue paper moved toward the balloon and the penny did not
What caused the tissue paper to move towards the balloon?
Answer:
D. Electrical charge
Explanation:
What actually caused the tissue paper to move towards the balloon is "electrical charge".
When they rubbed the balloon with a piece of wool, the wool looses electrons which gives it a positive charge while the balloon gains electrons which gives it a negative charge.
The pieces of tissue paper is able to move toward (i.e attracted) the balloon because the negatively charged balloon is attracted to the positively charged tissue paper which was neutral.
Answer:
D
Explanation:
Determine the molarity of the bromide ions in solution formed by dissolving 53.79 g of MgBrz in 393.6 ml water?
Answer:
Explanation:
Given data:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Hello this question only for JungKookLuver and jguzman577! What my name?
Answer: ThankYou So much your name is Jacob!
Explanation: Hello
Answer: Thanks for the Free Points Brother!
Explanation: Yay! :D
Match the terms and the definitions Lesson 3.04 Question 6 options:
1.
The earth is in a position so that the North Pole is tilted most directly toward the sun.
2.
The tilt and revolution of the earth as it moves around the sun cause
3.
This is the day of the year with the least amount of daylight, which is due to the tilt of the earth's axis.
4.
Days and nights are equal length, and the noon sun is directly overhead.
Equinoxes
Winter Solstice
Summer Solstice
seasons
1. Summer Solstice
What is Summer Solstice?
Summer Solstice is an astronomical event that marks the longest day of the year and the official beginning of summer in the Northern Hemisphere. It takes place when the sun reaches its highest point in the sky, directly over the Tropic of Cancer. During this time, the days have the most hours of sunlight and the nights have the least hours of darkness. This is due to the Earth's tilt in relation to the Sun. On the day of the Summer Solstice, the sun rises earliest and sets latest. This event is celebrated around the world, with many cultures creating rituals to honor the season. In the U.S., some people celebrate by gathering together for festivals, bonfires and fireworks. Others mark the day by practicing yoga, meditating or spending time outdoors in nature. Summer Solstice is a time of renewal and celebration, a reminder of the power of light, and of the beauty of the changing seasons.
2. seasons
3. Winter Solstice
4. Equinoxes
To learn more about Summer Solstice
https://brainly.com/question/4243030
#SPJ1
Phosphine (PH3) can be prepared by the reaction of calcium phosphide , Ca3P2: based on this equation : Ca3P2 + 6H2O —-> 3 Ca(OH)2 + 2 PH3
Based on this equation , which of the following statements are correct?
(a) one mole of Ca3P2 produces 2 mol of PH3
(b) one gram of Ca3P2 produces 2g of PH3
(c) Three moles of Ca(OH)2 are produced for each 2 mol of PH3 produced
(d) the mole ratio between phosphine and calcium phosphide is 2 mol PH3 over 1 mol Ca3P2
Taking into account the reaction stoichiometry, you can observe that:
one mole of Ca₃P₂ produces 2 mol of PH₃.the mole ratio between phosphine and calcium phosphide is 2 mol PH₃ over 1 mol Ca₃P₂.Reaction stoichiometryIn first place, the balanced reaction is:
Ca₃P₂ + 6 H₂O → 3 Ca(OH)₂ + 2 PH₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Ca₃P₂:1 mole H₂O: 6 molesCa(OH)₂: 3 molesPH₃: 2 molesThe molar mass of the compounds is:
Ca₃P₂: 182 g/mole H₂O: 18 g/moleCa(OH)₂: 74 g/molePH₃: 34 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Ca₃P₂: 1 mole ×182 g/mole= 182 grams H₂O: 6 moles× 18 g/mole= 108 gramsCa(OH)₂: 3 moles ×74 g/mole= 222 gramsPH₃: 2 moles ×34 g/mole= 68 gramsCorrect statementsThen, by reaction stoichiometry, you can observe that:
one mole of Ca₃P₂ produces 2 mol of PH₃.the mole ratio between phosphine and calcium phosphide is 2 mol PH₃ over 1 mol Ca₃P₂.Learn more about the reaction stoichiometry:
brainly.com/question/24741074
brainly.com/question/24653699
Plant A gets no fertilizer, plnt B-5mg/day, and plnt C-10mg/day. Which is the control group?
Answer:
Plant A
Explanation:
This is because Plant A is what you will compare to the other plants. Because it has no fertilizer is is the independent variable.
how do water molecules disslove in salt
Because the positive part of water molecules attracts negative chloride ions and the negative part of water molecules attracts positive sodium ions, water may dissolve salt. The solubility of a material is the quantity of that substance that can dissolve in a liquid (at a given temperature).
how many grams of water are needed to react with 71.0g CaN2?
Answer:
1
Explanation:
Mass of
C
a
C
N
2
= 75.0 g
From the equation,
C
a
C
N
2
(
s
)
+
3
H
2
O
(
l
)
→
C
a
C
O
3
(
s
)
+
2
N
H
3
(
g
)
1 mol of
C
a
C
N
2
reacts with 3 moles of water to give calcium carbonate and ammonia.
Number of moles of
C
a
C
N
2
,
n
=
G
i
v
e
n
m
a
s
s
M
o
l
a
r
m
a
s
s
Molar mass of
C
a
C
N
2
= 92.11 g/mol
Therefore,
n
C
a
C
N
2
=
75
g
92
.11
g
/
m
o
l
=
0
.814
m
o
l
Moles of water =Therefore,
n
C
a
C
N
2
=
75
g
92
.11
g
/
m
o
l
=
0
.814
m
o
l
Moles of water =
3
×
0
.814
m
o
l
e
s
=
2
.442
m
o
l
e
s
Mass of water needed;
=
m
o
l
e
s
o
f
w
a
t
e
r
×
m
o
l
a
r
m
a
s
s
o
f
w
a
t
e
r
=
2
.442
m
o
l
×
18
g
/
m
o
l
=
43
.956
g
Thus, 43.96 g of water is needed to react with 75 g of
C
a
C
N
2
.
What can be used to determine the absolute age of two rocks? *
Answer:Ithink erosion cuz if we can tell how long ago it eroded we can see how old it is
Explanation:
A sample of 0.500 moles of nitrogen occupies 1.000 L. Under the same conditions, what number of moles occupies 1.200 L
Answer:
I think
0.6 moles of nitrogen
Assuming a 4.00 litre of a sample gas at 1.00 atm compressed to 0.800 litre at constant temperature. Calculate the final presure of the gas.
At constant temperature, the final pressure of the compressed gas is 5.0atm.
Given the data in the question;
Initial volume of the gas; [tex]V_1 = 4L[/tex]Initial Pressure; [tex]P_1 = 1.0atm[/tex]Final volume; [tex]V_2 = 0.800L[/tex]Final pressure; [tex]P_2 = \ ?[/tex]
Boyle's lawBoyle's law states that the volume V of a given quantity of gas is inversely proportional to its pressure P at constant temperature.
It is expressed as;
[tex]P_1V_1 = P_2V_2[/tex]
Where [tex]P_1[/tex] is Initial Pressure, [tex]V_1[/tex] Initial volume, [tex]P_2[/tex] is Final Pressure and [tex]V_2[/tex] is Final volume.
To determine the final pressure of the gas, we substitute our given values into the expression above.
[tex]P_1V_1 = P_2V_2\\\\P_2 = \frac{P_1V_1}{V_2} \\\\P_2 = \frac{1.0atm \ *\ 4L}{0.800L}\\ \\P_2 = \frac{1.0atm \ *\ 4}{0.800}\\\\P_2 = \frac{4.0atm}{0.800}\\\\P_2 = 5.0atm[/tex]
Therefore, at constant temperature, the final pressure of the compressed gas is 5.0atm
Learn more about Boyle's law: brainly.com/question/1437490
Why atoms in our body don’t
eject electrons?
Answer:
When there are too many protons, some of the outer protons are loosely bound and more free to react with the electron. But most atoms do not have too many protons, so there is nothing for the electron to interact with. As a result, each electron in a stable atom remains in its spread-out wavefunction shape.
In an atom, there is a nucleus made up of neutral charged, neutrons, and positively charged protons. The reason why electrons which are negatively charged, don't fly off is due to its stronger attraction to the protons. ... This, however, still allows the electrons to move around the nucleus of an atom.
HBr + Al(OH)3 = H2O + AlBr3, how do I balance this equation?
Answer: This is an acid-base reaction (neutralization): Al(OH) 3 is a base, HBr is an acid. ; Colorless gas with a sharp, irritating odor.
...
Search by products (AlBr 3, H 2O)
1 HBr + Al(OH)3 → H2O + AlBr3
2 Al2O3 + HBr → H2O + AlBr3
Explanation: