Answer:
0.420 g/ml
Explanation:
Question
An empty container with a volume of 140.0 cm3 is weighed and found to have a mass of 73.3 g. The container is filled with a liquid and reweighed. The mass of the container and the liquid is 192.1 g. What is the density of the liquid to the appropriate number of figures
density = mass/volume
d = (192.1 -73.3)/140.0 = 58.8/140.0 =0.420 g/ml
An empty container with a volume of 140.0 cm3 is weighed and found to have a mass of 73.3 g. The container is filled with a liquid and reweighed. The mass of the container and the liquid is 192.1 g.0.420 g/ml is the density of the liquid.
What is density ?The term density is defined as the mass of a substance per unit volume. density expressed in grams per cubic centimeter. The formula of density is as follows:
Density = mass/ volume
The density of something is a measure of how heavy it is in relation to its size. When an object is denser than water, it sinks; when an object is less dense than water, it floats. Density is a property of a substance that is independent of the amount of substance.
Given:
Volume = 140.0 cm³
Density = ?
mass = 73.3 g, 192.1 g.
density = mass/volume
density = (192.1 -73.3) / 140.0
= 58.8/140.0
=0.420 g/ml
Thus, The mass of the container and the liquid is 192.1 g.0.420 g/ml is the density of the liquid.
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One way to limit deforestation is by
A. Practicing crop rotation
b. Increaseing soil fertilization
C. Increase of wood products
D. Using trees grown on tree farms
Thank you!
Answer:
the answer should be d I'm pretty sure.
Mia wanted to know how Earth's movements created new landforms. She decided to read about folded mountains and their characteristics because
she had seen them in the Alps. Which of the following statements describe characteristics of folded mountains? Choose the three statements that apply
A They contain a combination of both anticlines and synclines
B. The crust deforms and bends but it does not break
C. The crust breaks into large chunks to form a series of sharp peaks
D. The folds can bend upward and form mountains
0 0 0
E The folds form in ridges over the top of divergent boundaries
F. They can cause Earth's crust to thin during mountain formation
Answer:
C. the crust breaks into large chunks to form a series of sharp peaks
Explanation:
plates are extremely thin and they can either collide and fuse or simply break. This causes mountains like the Alps and may cause volanic explosions as well.
https://www.nps.gov/subjects/geology/plate-tectonics-collisional-mountain-ranges.htm <- this article may be of interest to you.
The crust breaks into large chunks to form a series of sharp peaks. This describe characteristics of folded mountains. Therefore, the correct option is option C.
What is folded mountains?Mountains that have been folded are a result of compressive forces produced by endogenetic forces that originate inside the earth. These mountains, which may be found on all continents, are the tallest and largest in the globe.
Folded mountains are distributed throughout the world in a pattern that indicates that they are typically located along the edges of the continents, either in a north-south or an east-west direction. The crust breaks into large chunks to form a series of sharp peaks. This describe characteristics of folded mountains.
Therefore, the correct option is option C.
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A gas sample has a volume of 1424 liters at STP. How many moles of gas are there in the sample?
Answer:
[tex]\boxed {\boxed {\sf 63.57 \ mol }}[/tex]
Explanation:
We are asked to find how many moles of gas are in a sample.
At standard temperature and pressure (STP), any gas has a molar mass of 22.4 liters per mole. This means 1 mole of every gas at STP has a volume of 22.4 liters.
We will convert using dimensional analysis. Set up a conversion factor using the molar mass.
[tex]\frac {22.4 \ L }{1 \ mol }[/tex]
We are converting 1424 liters of gas to moles, so we multiply the conversion factor by this value.
[tex]1424 \ L *\frac {22.4 \ L }{1 \ mol }[/tex]
Flip the ratio so the units of liters cancel.
[tex]1424 \ L *\frac {1 \ mol }{22.4 \ L }[/tex]
[tex]1424 *\frac {1 \ mol }{22.4 }[/tex]
[tex]\frac {1 424}{22.4 } \ mol[/tex]
[tex]63.5714286 \ mol[/tex]
The original value of volume (1424 L) has 4 significant figures, so our answer must have the same. For the number we found, that is the hundredth place. The 1 in the thousandth place tells us to leave the 7 in the hundredth place.
[tex]63.57 \ mol[/tex]
There are approximately 63.57 moles of gas in a sample of 1424 liters.
The relative atomic mass of sulfur is 32 and of oxygen it is 16. The compound shown below contains 80g of sulfur and 120g of oxygen. What is the value of x?
Answer: 32g of sulfur, S, is 1 molar mass
1 molar mass contains X particles (in this case, atoms)
32g of oxygen, O2, is 1 molar mass
1 molar mass contains X particles (in this case, molecules)
There are 2 oxygen atoms in each molecule of O2 gas
Therefore, there are 2X atoms of oxygen in 32g of oxygen gas.
Explanation: bcs yes
The value of x in the compound SOₓ is 3 . The compound is SO₃
The relative atomic mass of sulphur is given as 32
The relative atomic mass of oxygen is given as 16
The compound shown contains 80 g of sulphur and 120 g of oxygen.
The value of x can be calculated as follows:
molecular mass of S0ₓ = 32 + 16x
if 32 g of sulphur is in 32 + 16x of the of S0ₓ
80 g of sulphur is in 200 g of the compound
cross multiply
200(32) = 80(32 + 16x)
6400 = 2560 + 1280x
6400 - 2560 = 1280x
3840 = 1280x
x = 3840 / 1280
x = 3
Therefore, the compound is SO₃
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You have 1024 grams of a radioactive element with a half life of 1 year. How much do you have left of it (in grams) after 6 years
We will be left with 16g after 6years
The half-life of radioactive isotopes refers to the amount of time it will take for half of the amount of the original isotope to decay.
it is calculated as
N(t)=N₀([tex]\frac{1}{2}[/tex])^(t/t₁/₂)
where,
N(t) = quantity of the substance remaining
N₀ = initial quantity of the substance
t= time elapsed
t₁/₂ = half life of the substance
Given that:
The initial quantity is 1024g,
The half-life is 1year,
6 years is the time elapsed.
We have that
N(t)=N₀([tex]\frac{1}{2}[/tex])^(t/t₁/₂)
N(t)=1024([tex]\frac{1}{2}[/tex])^(6/1)
N(t)=1024([tex]\frac{1}{2}[/tex])⁶
N(t)=1024 x 0.015625
N(t)=16g
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The first ionization energy, , of a sodium atom is 5.00×102 kJ/mol . What is the wavelength of light, in nanometers, that is just sufficient to ionize a sodium atom?
Answer:
2.40 × 10² nm.
Explanation:
We are given that the the first ionization of a sodium atom is 5.00 × 10² kJ/mol and we want to determine the wavelength of light (in nm) that is sufficient to ionize a sodium atom.
We will first find the ionization energy required for one sodium atom using molar conversions:
[tex]\displaystyle 1 \text{ atom Na} \cdot \frac{5.00 \times 10^2\text{ kJ}}{\text{mol Na}} \cdot \frac{1\text{ mol Na}}{6.02\times 10^{23} \text{ atom Na}} = 8.31 \times 10^{-22} \text{ kJ}[/tex]
From the formula:
[tex]\displaystyle E = hv[/tex]
Where h is Planck's constant, substitute and solve for frequency v:
[tex]\displaystyle \begin{aligned} \left(8.31 \times 10^{-22} \text{ kJ}\right) &= (6.626\times 10^{-34} \text{J$\cdot$s})\left(\frac{1 \text{ kJ}}{1000 \text{ J}}\right) v \\ \\ v & = 1.25\times 10^{15} \text{ s}^{-1}\end{aligned}[/tex]
From the relationship between frequency and wavelength, solve for wavelength:
[tex]\displaystyle \begin{aligned} c & = \lambda\nu \\ \\ \lambda & = \frac{c}{v} \\ \\ & = \frac{(3.00 \times 10^8 \text{ ms}^{-1})}{(1.25 \times 10^{15}\text{ s}^{-1})}\cdot \left( \frac{1\times 10^9\text{ nm}}{1 \text{ m}}\right)\\ \\ &=2.40\times 10^2 \text{ nm} \end{aligned}[/tex]
In conclusion, the wavelength of light necessary to ionize a sodium ion is about 2.40 × 10² nm.
given that R=0.0821 (L•atm) / (mol•K) how many moles must be in a 2L container at 1.8 atmospheres with a temperature of 270K
The number of mole in the container at 1.8 atm with a temperature of 270 K is 0.162 mole.
From the question given above, the following data were obtained:
Gas constant (R) = 0.0821 atm.L/Kmol
Volume (V) = 2 L
Pressure (P) = 1.8 atm
Temperature (T) = 270 K
Number of mole (n) =?Using the ideal gas equation, we can obtain the number of mole in the container as illustrated below:
PV = nRT1.8 × 2 = n × 0.0821 × 270
3.6 = n × 22.167
Divide both side by 22.167
n = 3.6 / 22.167
n = 0.162 moleTherefore, the number of mole in the container is 0.162 mole
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8. When an object is submerged in water, the buoyant force
exerts pressure on all surfaces of the object
acts in the same direction as the force of gravity
displaces the fluid around the object
exerts an upward force on the object
Answer:
exerts an upward force on the objectExplanation:
As we know,
Buoyant force is that force produced by water in upward direction when any object is kept over it.♤ So, when an object is submerged in water the upward force of water that is buoyant force, acts on the object.calculate the mass percentage of H3PO4
Answer: phosphoric acid, H3PO4 (gives pop a tart taste)
% O: 1 mol H3PO4 (4 mol O / 1 mol H3PO4) (16 g / 1 mol O) = (64 g O / 98 g H3PO4) x 100 = 65.3%
% P: 1 mol H3PO4 (1 mol P / 1 mol H3PO4) (31 g / 1 mol P) = (31 g P / 98 g H3PO4) x 100 = 31.6%
the number of moles of a substance can be converted into molecules by:
Answer:
Multiply the molar amount by Avogadro's number.
Explanation:
What causes bonds in oxygen and glucose molecules to break
Answer: Cellular Respiration
Explanation: Is the process in which the cells of living things break down the organic compound glucose with oxygen to produce carbon dioxide and water. The overall chemical equation for cellular respiration is:
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (stored in ATP)
Cellular respiration takes place in the cells of all organisms. It occurs in autotrophs such as plants as well as heterotrophs such as animals.
How many mL of a 0.138 M aqueous solution of chromium(III) nitrate, , must be taken to obtain 14.0 grams of the salt
Answer:
Explanation:
First you need to calculate the mole of substance and then from the molarity the volume of the substance.
note: don't forget to convert volume liter mL in molarity.
i have a question can someone answer these questions for me please?
At what temperature (in K) will 3.5 moles of gas occupy 2.7 L at 1.5 atm? HELP PLEASE!
3.5 moles of a gas will occupy 2.7 L at 1.5 atm at a temperature of 14.1K
IDEAL GAS LAW:
The temperature of a gas can be calculated using the ideal gas law equation:PV = nRT
Where;
P = pressure (atm)V = volume (L)n = number of moles (mol)R = gas law constant (0.0821 Latm/molK)T = temperature (K)According to this question, P = 1.5atm, V = 2.7L, n = 3.5moles, T = ?1.5 × 2.7 = 3.5 × 0.0821 × T4.05 = 0.28735TT = 4.05 ÷ 0.28735T = 14.1KTherefore, 3.5 moles of a gas will occupy 2.7 L at 1.5 atm at a temperature of 14.1KLearn more at: https://brainly.com/question/13821925?referrer=searchResults
ANY rock can become a new sedimentary rock when ________
A. sediments are compacted and compressed under pressure.
B. sediments are melted then cooled.
C. magma is compacted and compressed with pressure.
D. magma is melted and cooled.
Answer:
sediments are compacted and compressed under pressure
why is gold not magnetic
Gold (Au) in its bulk form, like the metal in a wedding ring, is not considered a magnetic material. ... This means that metallic gold has no unpaired electrons, and it does not display classical magnetism. Gold was one of the first metal known to man. Gold is most malleable and ductile of all metals.
Aqueous NaOH was chosen as the solvent to crystallize benzoic acid. Why is this solvent a bad choice for the recrystallization
NaOH reacts with benzoic acid to form sodium benzoate therefore, aqueous NaOH is a bad choice for the recrystallization of benzoic acid.
Recrystallization is a process of obtaining a pure solute by dissolving a solute in a solvent at high temperature and cooling the solution rapidly so that the pure solute can crystallize out of solution.
It is important to note that the solute must not react with the solution from which it is to be recrystallized. Unfortunately, NaOH reacts with benzoic acid to form sodium benzoate therefore, aqueous NaOH is a bad choice for the recrystallization of benzoic acid.
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Hydrogen bond is a strong dipole interaction between water and another molecule true or false want an ans
Answer:
it is true
Explanation:
that's the right answer
Answer: True. Hydrogen bonding is a dipole-dipole interaction and it is between water and another molecule.
#4.
4. Use the atomic model above to answer the following questions: 1 pt for each blank
a. How many protons?
b. How many neutrons?
c. What is the name of this atom?
Answer:
A → 16 protons
B → 16 neutrons
C → Sulfur
Explanation:
Remember, in a neutral atom the amount of protons is the same as the number of electrons. In the picture provided, its shown that there are 16 electrons which means there are 16 protons. Finding the amount of neutrons will be more tricky. The valence electron count will allow us to find this. The valence electrons will allows us to determine where it is on the periodic table (So does atomic number). The valence electron count is 6. So, using the current information (6 valence electrons and atomic number of 16) we can look at the periodic table and pinpoint which element it is. As you look, you'll find that the element sulfur matches the information. Since the element is sulfur, and it has an atomic mass of 32, we can subtract the atomic number from the atomic mass to find the amount of neutrons.
32 - 16 = 16
Thus, the atom in the picture is sulfur with an atomic number of 16, atomic mass of 32, and an electron count of 6.
Can someone help me with questions c,d , and number 16 for 10th grade chemistry
Answer:
i cant but ask awadtameem for help
Explanation:
Please help me with this thank you so much !!
Answer:
C and D
Explanation:
The answer is C and D
What precautions need to be taken for working with the nucleophilic medium? What does it consist of?
A precaution that needs to be taken for working with the nucleophilic medium is ensuring the stability of the carbonation intermediate formed and Steric hindrance.
Discussion:
The likelihood of a nucleophilic substitution reaction proceeding by a dissociative mechanism depends to a large degree on the stability of the carbocation intermediate that forms.
Steric hindrance: Reactions where nucleophiles attack carbon-based electrophiles are significantly more sensitive to steric effects, because empty orbitals on carbon are not as accessible.
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A sample of a compound is decomposed in the laboratory and produces 72.1 g carbon, 12.1 g hydrogen, and 48.0 g oxygen. Calculate the empirical formula of the compound.
Answer:
empirical formula is C6H12O3
Explanation:
A sample of a compound is decomposed in the laboratory and produces
72.1 g carbon, 12.1 g hydrogen, and 48.0 g oxygen. Calculate the empirical formula of the compound.
divide the gm by the atomic mass and ratio the results
C=72.1/12.01 =6.00
H = 12.1/1.01 = 11,98 =~12
O =48.0/16 = 3
empirical formula is C6H12O3
Explain why warm nitric acid is used
Answer:
Lead is added to warm dilute nitric acid. When the carbonate has reacted with the warm acid, more carbonate is added until the carbonate is in excess.
Explanation:
Answer:
Nitric acid is used for the production of ammonium nitrate, a major component of fertilizers. It is also used for producing explosives like nitroglycerin and trinitrotoluene (TNT) and for oxidizing metals.
Explanation:
Consider the unbalanced chemical equation:
H3PO4 (aq) + Ba(OH)2 (aq) → Ba3(PO4)2 (S) + H2O
A volume of 46.0 mL of aqueous Ba(OH)2 solution was required to
react completely with 0.685 g H3PO4 (molar mass = 98.0 g/mol) to
produce Ba3(PO4)2. Calculate the molar concentration of the
Ba(OH)2 solution.
A)0.552 M
B)0.228 M
C)0.403 M
D)0.328 M
E) 0.655 M
By balancing the equation, it is obtained that 2 moles or 196 g of H₃PO₄ is required to react with 3 moles or 514.02 g of Ba(OH)₂. Thus, 0.685 g of H₃PO₄ reacts with 1.796 g Ba(OH)₂. The molarity of 1.796 g of Ba(OH)₂ in 46 ml is 0.217 molar.
What is molarity?Molarity of a solution is the ratio of the number of moles of solute to the volume of solution in liters. Molarity is the common term used to represent the concentration of the solution.
The balanced equation of the given reaction is written as:
[tex]\rm 2 H_{3}PO_{4} + 3Ba(OH)_{2} \rightarrow Ba_{3}(PO_{4})_{2} + 6H_{2}O[/tex]
As per this reaction, 2 moles of H₃PO₄ reacts with 3 moles of Ba(OH)₂.
Molar mass of H₃PO₄ = 98 g/mol
2 moles = 2 × 98 = 196 g.
molar mass of Ba(OH)₂ = 171.3 g/mol
3 moles = 171.3 × 3 = 514.0 g.
The mass of Ba(OH)₂ produced from 0.685 g of H₃PO₄ is calculated as follows:
= (0.685 × 514 g) /196 g
= 1.796 g.
Number of moles of 1.796 g of Ba(OH)₂ = 1.796 g/ 171.3 g/mol = 0.010 mol
The volume of the solution is 46 ml or 0.046 L. Thus, molarity of the solution is = no.of moles/volume in L
= 0.010 moles/ 0.046 L
= 0.217 M.
Therefore, the molar concentration of Ba(OH)₂ is 0.217 M.
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Many plants that grow in shady areas have large leaves. This feature helps the plants gather more sunlight for photosynthesis. Which statement describes an example of evolution?
A. All plants pass the genes for large leaves to their offspring.
B. Plants with leaves of varying size sprout in gardens each year.
C. All plants have variation in their genes for leaf size.
D. Plants with large leaves have become common in rain forests.
Answer: D.Plants with large leaves have become common in rain forest
Explanation: I got this right on the test trust me
Answer:
D. Plants with large leaves have become common in rain forests
Explanation:
I got it correct. Be careful that sometimes the questions are in another order, so be guided by the sentence.
How did Avogadro know that a mole is exactly equals to 6.022×10²³ Particles?
Answer:
Avogadro's number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. This can also be written as 6.022×1023 mol-1. The mass of one mole of a substance is equal to that substance's molecular weight.
Explain how the strongest type of intermolecular force in liquid HF arises
Answer:
The fairly positive hydrogen on one HF molecule will be attracted to one of these lone pairs on a nearby HF molecule. This is a hydrogen bond. Hydrogen bonds are attractions between a δ+ hydrogen on one molecule and a lone pair on a very electronegative atom (N, O or F) on another molecule.
Explanation:
What is the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7?
Explanation:
Principal quantum number=n=7
Azimuthal quantum number=l:-
[tex]\\ \sf\longmapsto n-1[/tex]
[tex]\\ \sf\longmapsto 7-1[/tex]
[tex]\\ \sf\longmapsto \ell=6[/tex]
The maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7 is 6.
What are quantum numbers?The term quantum number is used to describe the set of numbers that describe the position of an electron in an atom. Now we know that the secondary quantum number (l) have values from zero to n - 1.
Hence, the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7 is 6.
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safety rules for using primus stove
Answer:
1. Never leave the gas cartridge in the stove when you’re not using it.
2. Always wait until the stove cools down before you remove the gas cartridge.
3. Always try to store gas cartridges and camping stoves in a dry place
4. Clean your stove each time you have used it because it needs to be clean in order to perform at its best.
