Answer:
4777.09grams
Explanation:
To find the mass of oxygen, we first need to find the mass of potassium sulfate (K2SO4).
Since there are 4.50 x 10^25 formula units of potassium sulfate, we can find the number of moles in K2SO4 by dividing by Avagadros number (6.02 × 10^23 units). That is;
number of moles of K2SO4 (n) = 4.50 x 10^25 ÷ 6.02 × 10^23
= 0.747 × 10^ (25-23)
= 0.747 × 10^2
= 7.47 × 10^1 moles
Mass in grams of K2SO4 can be calculated thus: molar mass of K2SO4 × moles
= 174.252 g/mol × 7.47 × 10^1 moles
= 13016.62grams.
Since mass of oxygen in 1 mol of K2SO4 = O4 = 63.996 g/mol
We find the percentage by mass of oxygen in K2SO4 as follows:
= 63.996/174.252 × 100
= 0.367 × 100
= 36.7% by mass of oxygen.
This means that in 1gram of K2SO4, there are 0.367gram of Oxygen. Hence, in 13016.62grams (4.50 x 10^25 units) of K2SO4, there will be;
0.367 × 13016.62
= 4777.09grams of oxygen.
How much does a 130 kg object weigh on Earth?
A 130 kg object weighs approximately, 1274 Newtons on Earth.
The weight of an object on Earth can be calculated using the formula:
Weight = mass × acceleration due to gravity
Weight is calculated by multiplying the mass of an object by the acceleration due to gravity. On Earth, the acceleration due to gravity is approximately 9.8 meters per second squared (9.8 m/s²).
In this case, we have a 130 kg object. To find its weight on Earth, we can use the formula:
Weight = mass × acceleration due to gravity
Weight = 130 kg × 9.8 m/s²
Weight = 1274 Newtons (N)
So, the weight of a 130 kg object on Earth is approximately 1274 Newtons.
Therefore, a 130 kg object weighs approximately, 1274 Newtons on Earth.
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8. Look at the following electronic configurations of elements and predict which element has the highest electron affinity? Explain your answer. [ /3A]
a. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
b. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
c. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
d. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
e. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
Answer:
e, beacause that is the higher voltage
Explanation:
calculate
Select the correct answer.
What is the chemical formula of calcium chloride?
A.
CaCl
B.
Ca2Cl2
C.
Ca2Cl
D.
CaCl2
Answer:
D.CaCl2
Explanation:
Answer:
ans is D because the velency of calcium is 2 and clorine is 1 if we do cross multyply then it is option dWhat is the molarity of a solution in which 35 mole of AgNO3 is dissolved in 5 L of solution?
Answer:
23
Explanation:
Answer:
0.118m
Explanation:
Standard temperature and pressure are
A. 0°C and 1.00 kPa
B. 0°C and 101.3 kPa
C. 273°C and 1.00 kPa
D. 273°C and 101.3 kPa
Answer:
D
Explanation:
7. A small stone added to boiling liquids to make them boil more evenly without sudden violent releases of
vapours are called
Answer:
A boiling chip, boiling stone, porous bit or anti-bumping granule is a tiny, unevenly shaped piece of substance added to liquids to make them boil more calmly.
These help in making the liquid boil more easily
Answer:
umm i think it's called boiling chip
Which group in the periodic table contains the lightest ferromagnetic element?
Question 12 options:
A)
Group 9
B)
Group 8
C)
Group 10
D)
Group 7
The answer is B) Group 8 .
if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, how many moles of ammonia gas would be produced?
Answer: 3.00
Explanation: got the answer from my teachers notes
According to stoichiometry, if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, 3 moles of ammonia gas would be produced.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical reactions.In the given reaction 3 moles hydrogen gives 2 moles ammonia, thus, 4.5 moles of hydrogen will give, 4.5×2/3=3 moles.
Thus, if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, 3 moles of ammonia gas would be produced.
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Balance the following equation:
Sg + F2 --> SF
Answer:
S+ F2 ⇒ SF
S=1
F =2
So S +F2 ......... 2SF
2S + F2 ..........2SF this is a balance equation
S=2 F=2 in left side s=2 F = 2 in rightside
Explanation:⇆
⇒
An isotope of an element has 95 protons and 146 neutrons. What is the symbol for this
element?
Answer:
238 is the answer
Explanation:
238 - 146 + 3 = 95
Americium (95Am) is an element that has 95 protons and 146 neutrons in its nucleus of an atom.
What is Americium (95Am)?Americium is an element that has 95 protons and 146 neutrons. Its symbol is Am. Its atomic mass is 241 amu which is get by addition of proton and neutron.
So we can conclude that Americium (95Am) is an element that has 95 protons and 146 neutrons in its nucleus of an atom.
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what is the molarity of 5.63 moles of lithium in 3.25 liters of solution
Answer:
1.73 Molar
Explanation:
The formula is Molarity=moles of solute/liters of solution, which can be written in whatever way you prefer, and examples include: M=N/V or M=mol/L.
M=N/V
M= [tex]\frac{5.63}{3.25}[/tex]
Divide 5.63 by 3.25. When you calculate this, you get 1.73, therefore your answer is 1.73 molar.
Two different gases are stored inseparate closed containers. If both gases have a temperature of 50°C, which
statement is true?
Answer:
Explanation:
there should be more showing than telling
What is the different things that we have and animals?
Answer:
the different things that we have and animals are.:
to gain emotional support.it acts as a real friend.for meat,flesh,milk and milk products, wool,etc.for transportation like horseto enjoy and play like with dolphinsWhen would scientists need to change a theory?
Answer:
if it cannot be made to fit the new findings
Answer:
As additional scientific evidence is gathered, a scientific theory may be modified and ultimately rejected if it cannot be made to fit the new findings; in such circumstances, a more accurate theory is then required.
Explanation:
please follow me
iammallikaanswer for brainlist and extra points!!
Answer:D
Explanation:
Why aren't acid-base reactions considered redox reactions, even though they involve the transfer of hydrogen atoms?
Answer: Acid/base and precipitation reactions almost always are NOT redox reactions. For redox to have happened, the number of electrons that an element has must change (i.e. its oxidation state must change). ... But the hydrogen ion never "has" any electron throughout the process and remains in a +1 oxidation state.
Explanation:
let me know if that helped...(☞ﾟヮﾟ)☞
Acid-base reaction is not a redox reaction, since the oxidation number remains unchanged in acid-base reaction.
What is acid-base reaction?An acid-base reaction is the chemical reaction that occur when acids and bases react together.
What is redox reaction?Redox reaction is a reaction that involves the transfer of electrons between the atoms, ions, or molecules.
Acid-base reactions involve the transfer of hydrogen ions between reactants. Redox reactions involve a change in oxidation number for one or more reactant elements.
Redox reactions involve a change in oxidation number for one or more reactant elements.
Acid-base reactions involve a transfer of a hydrogen ion instead of an electron and the transfer of an H+ ion leaves the oxidation numbers unaffected.
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Mention the reason why aquatic plants have air filled tissues.
Answer:
Aquatic plants have aur filled tissues to make them easy to float.....
Explanation:
It provides buoyancy
The tectonic plates float on the lower portion of Earth's crust?
Answer:
The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones. They float on a plastic-like part of the Earth's mantle called the asthenosphere.
Explanation:
Answer:
Yes
Explanation:
Can you help me please....
sorry the pic is blocked
Please please help me!!!! I WILL GIVE BRAINLIEST
Answer:
20.0 sec
you can use ln (2)=k* t1/2 then ln N2/N1=-k(t2-t1)
or just divide 100 by 2 then 50 by 2 then 25 by 2 then 12.5 by 2 and that is 4 half lifes at 5 secs each
Explanation:
copper sulphate solution turns the colour of litmus into red but litmus changes into blue with baking soda solution although both are salts. Give reason why?
Answer:
Copper sulphate is an acidic salt: It is the product of the reaction between a weak copper base and a strong acid , H2SO4
Litmus has a red colour in acidic solutions:
Conclusion: Acidic copper sulphate solution turns blue litmus to red
Baking soda is a basic salt : It is the reaction product of a weak acid , CO2 and a strong base , NaOH
Litmus has a blue colour in basic solutions:
Conclusion: basic baking soda solution turns red litmus to blue
What is the formula for sulfate?
What is the charge of sulfate?
What is the correct formula for copper (II) sulfate?
Answer:
SO₄²-, -2, CuSO4
Explanation:
Dang that was long.
What volume of ammonia (NH3) will react completely with 25.0 liters of O2? 4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
Answer:
18,75 litres
Explanation:
4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
n (NH3) : n (O2) = 4 : 3
<=>
V (NH3) : V (O2) = 4 : 3
Hence, V(O2) = 3 × V (NH3) ÷ 4 litres
V(O2) = 3 × 25.0 ÷ 4 litres
V(O2) = 75 ÷ 4 litres
V(O2) = 18,75 litres
If you have any questions, feel free to ask :)
Look at the periodic table below. Which of the following lists of elements forms a group on the periodic table?
periodic table
Group of answer choices
Sc, Ti, V, C
Answer:
I'm not totally sure but I think that it is C-carbon
Explanation:
because its in the area of +1+2+3 4 -3 -2 -1
The two basic types of air pollutants are _____.
liquids
invisible
particulates
gases
Answer:
particulates and gases
Explanation:
I gotta pick 4 last question to pass :,) pls help:>
whoever answers first will be marked brainliest unu
Answer:
Explanation:
heat up the solvent
increse the pressurre of the mixture
add more solute
agitate
Which of the following is the ground state electrons configuration of the F ion
Answer:
That leaves us with: 1s2 2s2 2p6 And that is the electron configuration for F- , the Fluoride ion.
Explanation:
plz give brainliest
HELP IM BEING TIMED
What type of weather can Georgia expect in the next 12 hours?
A light rain or drizzle
B heavy precipitation or thunderstorms
C many days of rain, snow, or fog
D sunny, clear, and windy
Answer: I think it's B
5. What is the charge on a single proton?
Answer:
it may be +1 or -1 hope this help
An atom is a kind of stuff that cannot be further decomposed chemically. Therefore, the charge on a single proton is +1.
What is atom?
The building block of an element is an atom. An atom is a kind of stuff that cannot be further decomposed chemically. The three main components of an atom are protons, neutrons, plus electrons.
Some substances are either bigger or smaller than atoms. Instances of chemical species that aren't commonly regarded as atoms include protons, neutrons, and electrons, which are atom-related particles. Atoms make up molecules and compounds, however they are not actual atoms. Salt is an example of a molecule and a compound (NaCl). The charge on a single proton is +1.
Therefore, the charge on a single proton is +1.
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Level 3
Q1
Forces that are equal but opposite
are called
A. Net force
B. Friction
C. Centripetal force
D. Balanced forces
option D Balanced force