Answers
Answer:
1. a) 1.27 mol H₂SO₄
2. b) 19 g KCl
Explanation:
The grass method is an acronym for Given, Required, Application, Solution, Statement.
1. a) Given, 125g H₂SO₄; Required, find the moles H₂SO₄; Application, 125g x molar mass of H₂SO₄, Solution, [tex]125g H2SO4 * \frac{1molH2SO4}{98.08gH2SO4} = 1.274469molH2SO4[/tex] Statement, Round to the lowest number of significant figures to get 1.27 mol H₂SO₄;
2. b) I am only show the equation for this one, but it is basically the same as the previous one. The molar mass of KCl is 74.55 g/mol.
[tex]0.25molKCl*\frac{74.55gKCl}{1molKCl} = 18.6375 gKCl[/tex]
Round to the lowest number of significant figures which is two to get 19 g KCl.
For 3 the unit converter between moles and molecules is 6.022 x 10²³ molecules/mol.
Let me know if you need more help.
Related Questions
+
The density of a liquid substance is 0.95 g/mL. Three students calculated the density as 0.56 g/mL. Calculate the percent error.
0 41.05 %
41.0 %
O 41.053%
O 41%
Answers
Answer:
The answer is 41.05 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual density = 0.95 g/mL
error = 0.95 - 0.56 = 0.39
So we have
[tex]p(\%) = \frac{0.39}{0.95} \times 100 \\ = 41.0526315...[/tex]
We have the final answer as
41.05 %Hope this helps you
What is the wavelength of a radio wave with a frequency of 3.1 X 106 Hz?
Answers
Answer:
Assuming that the frequency of a wave is 3 multiplied to 109 Hertz, then we use wave velocity over frequency. Therefore, 327 Hertz has a wavelength of approximately 917 kilometers and has a velocity of at least 300,000 kilometers per second
Explanation:
hope it helps give cronw ples
Electrons have single negative charges. What does this mean?
Answers
So long as it is not an ion, the charge of this atom will always be 0 overall, with the same amount of protons as electrons. So one singular electron with no proton to balance it out must have a negative charge equivalent to the number of electrons more than protons. Thus the overall charge must be 1-.
The following are examples of physical properties EXCEPT
Group of answer choices
reaction with oxygen
magnetism
electrical conductivity
boiling point
Answers
Answer:
color (intensive)
density (intensive)
volume (extensive)
mass (extensive)
boiling point (intensive): the temperature at which a substance boils.
melting point (intensive): the temperature at which a substance melts.
F. A rigid steel cylinder has a volume of 20.0 L. It is filled with N2 gas to a final pressure of 205 atm at 27.0 S. How
many moles of N2 gas does the cylinder contain?
Answers
Answer:
don't know this but going to figure out
Round to 4 significant figures. 9.87553
Answers
Answer:
9.876
Explanation:
5. What kind of crust is involved in picture D?
Answers
Explakjbkhbjhbjnatip[ok[okoon:
[tex]\sqrt[n]{x} \int\limits^a_b {x} \, dx \geq x^{2} \sqrt{x} \neq \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \pi \sqrt[n]{x} \frac{x}{y} \alpha \beta x_{123} \\ \leq \left \{ {{y=2} \atop {x=2}} \right. \int\limits^a_b {x} \, dx \int\limits^a_b {x} \, dx \geq \geq \geq \geq x^{2} x^{2} x^{2} \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\rig[/tex]
Question 1
Put these elements in order of the INCREASING the atomic radius.
Li, O, C, F
A)O, C, F, Li
B) Li, C, OF
C) F, O, C, Li
D) C, F, Li, o
Answers
Explanation:
we know that,
From Left to right (Period) atomic radius decreases
and
From Top to bottom (Group) atomic radius increases.
Li, C, O, F belongs to same period.
So,
Atomic radius decreases if we go left to right
Increasing order of Atomic radius -
Li > C > O > F
Therefore,
Option C is correct ✔.
Answer: C
Explanation:
The number of electrons (e- ) is
Answers
Answer:
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
Explanation:
Earth’s tides are affected by the gravitational pull of the Sun and the Moon, but mainly the Moon because the Moon is _______(1) Each day, each costal region on Earth experiences two high tides and two low tides in a ______(2) time period. This is because the gravitational attraction of the Moon creates ______(3) on two opposite sides of the planet. Two spring tides occur monthly, when the Moon is in its new and full phases. During these phases, the Moon and Sun are oriented ______________________,(4) which gravitationally pulls the water on Earth in the same direction, creating a large tidal range.
(1) A. closer
B. larger
C. denser
(2) A. 12-hour
B. 16-hour
C. 24-hour
(3) A. tidal bulges
B. moon phases
C. orbits
(4) A. in a straight line
B. at a right angle measuring 90 degrees
C. at an acute angle measuring 23 degrees
Answers
Answer:
1 closer
2 24hours
3 tidal bulges
4 in a straight line
Explanation:
Tides have been the effect of the sea with the gravitational pull of the sun and moon.
1. Earth’s tides are affected by the gravitational pull of the Sun and the Moon, but mainly the Moon because the Moon is closer to the earth.
In spite of high pull of the Sun, the distance of moon from earth results in increased effect of moon gravitational pull than Sun.
2. Each day, each coastal region on Earth experiences two high tides and two low tides in every 24 hours time period.
The daily tides has been resulted at the coast with the moon revolution around the earth's rotation.
3. This is because the gravitational attraction of the Moon creates tidal bulges on two opposite sides of the planet.
The effect of the moon gravitational force results in the bulging or the pulling force to the sea, resulting in the diurnal tides.
4. Two spring tides occur monthly, when the Moon is in its new and full phases. During these phases, the Moon and Sun are oriented at a right angle measuring 90 degrees which gravitation pulls the water on Earth in the same direction, creating a large tidal range.
For more information about the high and low tides, refer to the link:
https://brainly.com/question/296886
A B C The circles shown above represent three different elements. The six images below are mixtures, how many of the images represent homogeneous mixtures.
edit; found the answer, since no one answered is: 2. for anyone wondering.
Answers
Answer: 2
Explanation:
(1 Point)
How many atoms are there in 3.33 moles of strontium?
Answers
Answer:
every mole of anything contains Avogodro's number of atoms. So: 6.08x10^23 x 3.33 = ?
Explanation:
what is the density of a man
Answers
Answer:
1.0 g per cubic centimeter.
Explanation:
Why is governmental funding of research important?
A. The government makes sure all scientists get the same amount of
money.
B. The government grants funding only to scientists whose research
won't harm people.
C. Scientists work for the government, which is where they get their
money from.
D. The government determines what is right and wrong for everyone.
Answers
Answer:
D. The government determines what is right & wrong for everyone
Explanation:
Quick chem question!
I will mark as BRAINLIEST!!!
Answers
Answer:
D
Explanation:
A and C sounds not logic
B is wrong since all the molecules has different numbers of carbon and hydrogen
D sounds correct because triple covalent bond exist at the C-C bonding
if you were conducting an experiment to see whether eating candy makes gerbils fat, what variable might you change?
A:The number of gerbils you feed incorrect answer
B:The amount of candy the gerbils eat incorrect answer
C:The amount of water the gerbils drink incorrect answer
D:The body mass of the gerbils incorrect answer
Answers
Answer:
B
Explanation:
the less candy will be the smallest gerbil and the most candy will be the fatest
Answer:
A) The number of gerbils you feed
Explanation:
If you wanted to test whether eating candy made gerbils fat you would need to fluctuate the amount of candy each group receives to observe whether there was any differnce in weight
What is the difference between an atom and an element? a An atom cannot be cut into smaller, but an element is a group of atoms that are the same b An atom makes up matter but an element does not c An atom can be combined but an element cannot be combined d An atom can be cut apart but an element cannot
Answers
Answer:
c.
Explanation:
One of the main differences between an atom and an element is that an atom can be combined but an element cannot be combined. There are many combinations of atoms that make up different gases, liquids, and solids each with a unique makup. For example, water is made up of two hydrogen atoms and one oxygen atom (H20). Elements are made up of only the same type of atom. For example, the element Hydrogen can only contain hydrogen atoms, while the element Carbon can only contain carbon atoms.
To make a saturated solution, 30 g of sodium chloride is dissolved in 100 g of
water at 293 K. Find its concentration at this temperature.
Answers
Answer:
30%
Explanation:
As the formula for finding concentration
= (mass of solute/mass of solution)×100
= (30/100)×100
= 0.3×100
= 30%
The concentration is 30%.
How to find concentration?As the formula for finding concentration
= (mass of solute/mass of solution)×100
= (30/100)×100
= 0.3×100
= 30%
What is a concentration?
The amount of a substance, such as salt, is in a positive amount of tissue or liquid, along with blood. A substance turns into more concentrated whilst much less water is present.
Learn more about concentration here: https://brainly.com/question/15900508
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Which would be least helpful in reducing indoor pollution?
O A. Increasing airflow
B. Using all-natural cleaning products
C. Having house plants
O D. Having thick carpet
Answers
thick carpet!!!Answer:
Explanation:
just got right on quiz:)
Fe(s) + O2(g) Fe3O2 (s)
Answers
Answer:
Fe2O3
Explanation:
if we have to answer whether it is wrong or correct then it is wrong because the correct answer would be Fe (s) + O2 (g) = Fe2O3 (s) because the valences will be exchanged
True or False : Scientists know perfectly and exactly every single thing about the Universe’s birth, and there is nothing left to discover
Answers
Answer:
False
Explanation:
The Universe's birth is only a theory. The theory has changed over the years, but currently the most believed theory is the Big Bang Theory. Also, there is always more to discover
(WILL GIVE BRAINLIEST TO BEST ANSWER) What might a weak acid do to a rock?
Answers
When water combines with carbon dioxide in the atmosphere, it will form carbonic acid, which is a weak acid. If this weak acid comes in contact with a rock, it will cause some of the rock to be dissolved. This process can also be referred to as weathering.
A rectangular solid has a length of 3 cm a height of 4 cm and a width of 5 cm what is the solid volume ?
Answers
Na: 1s22sC2p 3s
C=
D =
E =
Answers
Answer:
C = 2
D = 6
E = 1
Explanation:
just took the test :)
One hour of bicycle riding can require 500-900 kcal of energy, depending on the speed, the terrain, and the weight of the racer. An individual wants to lose weight by riding at a modest effort, consuming 505 kcal of energy per hour. How many hours must he ride to lose 21.0 pounds of body fat? One gram of body fat is equivalent to 7.70 kcal of energy. There are 454 g in 1 lb.
Answers
Answer:
145 hours
Explanation:
Since one hour of riding a bicycle takes up 505 kcal of energy. It is also stated that one gram of body fat is equal to 7.70 kcal. Also, it is given that 1 pound of body fat is equal to 454 g.
Hence;
1 Ib= 454 g
21 Ib= 21 × 454/1 = 9534 g
But
1g of body fat = 7.70kcal
9534 g of body fat = 9534 × 7.70 kcal/1 = 73411.8 kcal
If 505 kcal is lost in 1 hour
73411.8 kcal is lost in 73411.8 kcal × 1hour/505k cal = 145 hours
what are electron configurations?
Answers
Answer:
In atomic physics and quantum chemistry , the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s 2 2s 2 2p 6, using the notation explained below.
Explanation:
i found it on google
Answer:
To calculate an electron configuration, divide the periodic table into sections to represent the atomic orbitals, the regions where electrons are contained. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block and the two rows at the bottom are the f-block.
Explanation:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶, using the notation explained below.
A 30cm3 volume of water was placed in a cylinder, and a stone was dropped in. The water level rose by 35cm3. Is it true that the stone was 5cm3?
Answers
Answer:
The volume of stone is 5cm³.
Explanation:
Given data:
Volume of water = 30 cm³
Volume of water and stone = 35 cm³
Volume of stone was 5 cm³ = true or false
Solution:
To check weather the given volume of stone is true or not we have to calculate the volume of stone from given data.
Volume of stone = (volume of water + stone ) - volume of water
Now we will put the values.
Volume of stone = 35 cm³ - 30 cm³
Volume of stone = 5 cm³
Thus the given value is true. The volume of stone is 5cm³.
How many O's are in Al2(SO4)3 ?
Answers
Answer:
12 moles O
In one mole of aluminum sulfate, Al2(SO4)3 , there are 2 moles Al atoms, 3 moles sulfur atoms, and 12 moles O atoms
Explanation:
Answer:
1...
Explanation:
The chemical formula for sodium sulfate is Na2SO4. How many sulfur atoms are in the formula for sodium sulfate?
Answers
Answer:
1
Explanation:
there is only one sulphur (S) atoms in the formula for sodium sulphate
The chemical formula for sodium sulfate is Na₂SO₄.One sulfur atoms are in the formula for sodium sulfate.
What is chemical formula ?The term chemical formula shows the elements that create the compound and the numbers of atoms of each element in the smallest unit of that compound, be it a molecule or a formula unit.
Chemical formulas are classified into three types: empirical, molecular, and structural.
Empirical formulas depict the simplest whole-number ratio of atoms in a compound, whereas molecular formulas depict the number of each type of atom in a molecule and structural formulas depict how the atoms in a molecule are bonded to each other.
Thus, the chemical formula for sodium sulfate is Na₂SO₄. In sodium sulphate two molecules of sodium, one atom of sulfur, and four atoms of oxygen are present.
To learn more about the chemical formula, follow the link;
https://brainly.com/question/11995171
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A. Can you use mass alone to predict whether an object will sink or float?
Answers
Answer:
yess
Explanation: