Answers
Answer:
10 ml
Explanation:
The graduated cylinder contains 19 ml of water before the silver pellet is placed inside. Afterwards, the graduated cylinder measures 29 ml of water. Therefore the pellet displaced 10 ml of water. ( 29ml - 19ml = 10ml )
Related Questions
Which term best describes the important pieces of information that scientists gather and record during an experiment?
conclusions
data
research
supplies
Answers
Answer:
conclusions i think i am not confirmed
Answer:
b-data
Explanation:
right on the unit test review on edge
brainliest???
What's the major difference between carbon and other group IV elements, excluding allotropy
Answers
Answer:
Carbon has an ability of catenation which other group IV elements lack.
Explanation:
Catenation is the ability for an element to form multiple bonds with other elements leading rise to long chains of compounds.
An example is organic compounds.
[tex].[/tex]
what is Planck's constant ??
Answers
Planck's constant =
6.62607004 × 10-34 m2 kg / s
Explanation:
Step by Step explanation
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. Wikipedia
Answer:
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency.
Plancks constant =
6.62607004 × 10-34 m2 kg / s
pls mark me as brainliestGive reasons ,Argon is an inert gas.
Answers
Answer:
The outermost (valence) shell of argon has eight electrons, making it exceedingly stable and, thus, chemically inert. Argon atoms do not combine with one another; nor have they been observed to combine chemically with atoms of any other element.So argon is an inert gas
Answer:
because argon have 8 electrons in there outmost shell
which is enough to make it stable
If the sum of the last
number and the middle
number of three consecutive
integersis is 71, then the
Least (smallest) number
mumber must be
Answers
Answer:
number must be 0000.999
How do I calculate the volume?
Answers
Answer:
2477.6 cm³
Explanation:
Volume = length x width x height
Label in cm³
Classify these compounds as acid, base, salt, or other. Drag the appropriate items to their respective bins.
HCOOH, CH3OH, NaOH, HNO3, NaBr, NH3, CO2, KCl
Answers
base: NaOH, NH3
salt: NaBr, KCl
Other: CH3OH(alcohol), CO2 (can be considered acid when diluted/dissolved in water to form H2CO3)
HCOOH is an acid, KCL is a Salt, NaOH is a base.
Acids Bases and SaltsAn acid is defined as a substance which when dissolved in water produces hydronium ion (H3O+), neutralizes bases, tastes sour and turns blue litmus red.
Acids incldes:
HCOOH-weak acidHNO3-Strong acidA Base is a substance which in its aqueous solution produces hydroxyl ions (OH–), neutralizes acids , tastes bitter and turns red litmus blue
Bases incldes:
NaOHNH3A Salt is an ionic compound produced from the neutralization reaction of acids and bases. it is neutral substance and has no effect on litmus.
NaBrKCLThe folloing can be classifed as other or in aqueous solution as :
CO2-acidic oxide, Bronsted lewis acid CH3OH -Bronsted-Lowry acidLearn more on acids base and salts here:https://brainly.com/question/2927542
A cylinder fitted with a movable piston and filled with a gas has a volume of 188.5mL at 26.7 °C when the applied pressure is 755.2 torr. The temperature of the oil bath surrounding the cylinder was increased to 165.2 °C, and the load on the piston was changed. Careful measurement now gave a value of 210.5mL for the volume. What was the final pressure in the system, in torr? Select one:
O a. 715.5 tor O b. 576.9 torr Oc. 988 6 torr O d. 1233 torr 462.6 tor
Answers
Answer:
C
Explanation:
To find the new pressure, we will use this formula: P₁V₁/T₁ = P₂V₂/T₂
P₁ = Original pressure (755.2)
V₁ = Original volume (188.5)
T₁ = Original temperature in kelvins (26.7 + 273.15 = 299.85)
P₂ = Final Volume (?)
V₂ = Final volume (210.5)
T₂ = Final temperature in kelvins (165.2 + 273.15 = 438.35)
Here is our equation
(755.2)(188.5)/(299.85) = (210.5)P₂/(438.35)
Hopefully, you have a calculator handy because this equation will end up looking like this:
474.75471 = (0.48021)P₂
Divide both sides by the coefficient
474.75471/0.48021 = (0.48021)P₂/0.48021
P₂ = 988.64
Select the arrangement that orders the compounds by increasing boiling point based on predominant intermolecular force. Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices N2 < CO2 < NH3 < HF
Answers
The arrangement that orders the compounds by increasing boiling point based on predominant intermolecular force is; N2 < CO2 < NH3 < HF
The molecules that compose a substance are held together by intermolecular forces. The physical properties of a substance such as boiling points depends on the nature of intermolecular forces between substances. The greater the magnitude of intermolecular interaction between bonding atoms the higher the boiling point.
Nitrogen and CO2 molecules are only held together by weak dispersion forces. However, CO2 has a higher boiling point than N2 because CO2 has a higher molecular mass than N2.
Nitrogen is less electronegative than fluorine hence the magnitude intermolecular interaction via hydrogen bonding in HF is greater than that in NH3 consequently, the boiling point of HF is higher than that of NH3.
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In which way are the scientific method and the design process the same?
Answers
Answer: A lot of the steps are the same.
Explanation:
Scientific Method
State your question
Do background research
Formulate your hypothesis, identify variables
Design experiment, establish procedure
Test your hypothesis by doing an experiment
Analyze your results and draw conclusions
Communicate results
Steps of The Scientific Method
Engineering Design Process
Define the problem
Do background research
Specify requirements
Create alternative solutions, choose the best one and develop it
Build a prototype
Test and redesign as necessary
Communicate results
Steps of The Engineering Design Process
Salicyllic acid has what ionic charge?
Answers
Answer:
0
Explanation:
It has no charge.
Salicylic acid is insoluble in water because it is a non-polar covalent compound.
For this reason it is a poor conductor of electricity as it has no free moving ions that would act as charge carriers.
But on the other hand salicylate which is a conjugate base of salicylic acid has a charge of -1 and can be written as C7H5O3-.
hopefully this makes sense
:)
Calculate the mass of 1 molecule of water
with step
Answers
Molecular Mass of water:-
[tex]\\ \sf\longmapsto H_2O[/tex]
[tex]\\ \sf\longmapsto 2(1u)+16u[/tex]
[tex]\\ \sf\longmapsto 2u+16u[/tex]
[tex]\\ \sf\longmapsto 18u[/tex]
[tex]\\ \sf\longmapsto 18g[/tex]
1mole of water weighs 18g
We know
[tex]\\ \sf\longmapsto 1mol=6.023\times 10^23molecules[/tex]
Mass of one molecule:-
[tex]\\ \sf\longmapsto \dfrac{18}{6.023\times 10^23}[/tex]
[tex]\\ \sf\longmapsto 2.98\times 10^24g[/tex]
2. State a common metric unit and symbol obtained from each of the following instruments.
(a) metric ruler
(b) balance
(c) graduated cylinder
(d) thermometer
Answers
Answer:
cm
Explanation:
for short measurements
What is the Molality of a solution prepared by dissolving 84.7 g of KMnO4 (potassium permanganate, an oxidizing agent) in 165 g of water?
a) 0.513 m
b) 11.3 m
c) 0.308 m
d) 3.25 m
e) 0.958 m
Answers
which picture shows the particles in a compound?
picture I and II
picture I
picture III and IV
picture II
Answers
hi <3
compound are 2(or more) elements combined together
thus your answer will be picture I
hope this helps <3
Which one of the following is NOT the unit of wave number:
m-1
cm-1
mm-1
cm
Answers
Answer:
e
Explanation:
cm is not the unit of wave number out of the following.
What is a wave number?Definition: Total number of wave cycles present in a unit distance is termed a wave number.
Wave number is always a reciprocal of the unit of distance.Wave number is denoted by the letter 'k'.The formula for wave number is 2π/λ where λ is the wavelength. Since wave number is always reciprocal, cm is not the unit for a wave number. The higher the wave number, the higher the frequency and energy.To learn more about wave number, refer to:
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A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.056 g. When filled with distilled water at 25.0°C, it weighed 36.773 g. When filled with chloroform (a liquid once used as an anesthetic before its toxic properties were known), the apparatus weighed 41.451 g. At 25.0°C, the density of water is 0.99704 g/mL
Answers
Complete Question
A pycnometer is a glass apparatus used for accurately determining the density of a liquid. When dry and empty, a certain pycnometer had a mass of 27.056 g. When filled with distilled water at 25.0°C, it weighed 36.773 g. When filled with chloroform (a liquid once used as an anesthetic before its toxic properties were known), the apparatus weighed 41.451 g. At 25.0°C, the density of water is 0.99704 g/mL
-What is the volume of the pycnometer (mL)
We have that the volume of the pycnometer in mL is
[tex]V=9.111mL[/tex]
From the Question we are told that
Pycnometer mass of [tex]m_p=27.056 g.[/tex]
Temperature [tex]T=25 \textdegree[/tex]
Pycnometer filled with distilled water [tex]m_{pf}= 36.773 g[/tex]
Apparatus weighed [tex]w=41.451 g[/tex]
Density of water [tex]\rho= 0.99704 g/mL[/tex]
Generally the equation for Density is mathematically given as
[tex]\rho=\frac{mass}{Volume}[/tex]
Since pycnometer is filled with water its volume can be defined by the volume of water in it
Therefore
Mass of water Pycnometer filled with distilled water-Pycnometer mass
[tex]M_w=36.773 -27.056\\\\M_w=9.084g[/tex]
Hence
[tex]V=\frac{9.084g}{0.99704 }[/tex]
[tex]V=9.111mL[/tex]
in conclusion
The volume of the Pycnometer in mL is
[tex]V=9.111mL[/tex]
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? Is a scientist who is studying cancer with the
goal of finding an effective treatment doing
pure research or applied research?
Answers
A scientist who is studying cancer with the goal of finding an effective treatment is doing applied research.
Applied research refers to scientific investigations that are conducted with the specific purpose of solving practical problems or improving existing technologies. In the case of cancer research, the scientist is aiming to find a treatment that can be directly applied to patients in order to combat the disease.
In contrast, pure research, also known as basic or fundamental research, is conducted to gain a deeper understanding of a particular phenomenon without any immediate practical application in mind. Pure research aims to expand scientific knowledge and explore new theories or concepts. While pure research may indirectly contribute to the development of applied research, its primary goal is to advance our understanding of the natural world.
In summary, a scientist studying cancer with the goal of finding an effective treatment is engaged in applied research, as they are conducting research with the intention of solving a specific problem and developing practical solutions for the benefit of cancer patients.
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Determine the number of protons, neutrons, and electrons in the following isotopes
that are used in medical diagnoses:
a. atomic number 9, mass number 18, charge of 1-
b. atomic number 43, mass number 99, charge of 7+
C. atomic number 53, atomic mass number 131, charge of 1-
d. atomic number 81, atomic mass number 201, charge of 1+
e. Name the elements in parts (a), (b), (c), and (d).
Answers
Answer: In table below.
Explanation:
A.N. (atomic number) = protons
Mass (Total AMU)
Charge
P= Protons, same as atomic number
N = Neutrons, Atomic Mass Number - Protons
E = Electrons. (Atomic Number - Charge)
Element = Defined by atomic number
a) Atomic number=9 Protons = 9, neutrons = 9, electrons = 10
b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36
c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52
d) Atomic number=81, Protons = 81, neutrons = 120, electrons = 80
e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.
What is the atomic number?Atomic Number (Z)= number of protons = number of electrons
Mass number (A) = number of protons + number of neutrons.
For ions with a positive net charge:
Number of electrons = Z - net charge
For ions with negative net charge:
Number of electrons = Z + net charge
a) Atomic number=9 Protons = 9, neutrons = 9, electrons = 10
b) Atomic number=43, Protons = 43, neutrons = 56, electrons = 36
c) Atomic number=53, Protons = 53, neutrons = 78, electrons = 52
d) Atomic number=81, Protons = 81, neutrons = 120, electrons = 80
e) Name the elements in parts (a), (b), (c), and (d) are F, Tc, I and Tl.
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Pioneer 10 is a 267.1-kilogram robotic space probe that completed the first interplanetary mission
to Jupiter, and became the first spacecraft to achieve escape velocity from our solar system. How
much does it weight in pounds (lbs)?
Answers
Answer: 588.9 lbs
Explanation: 1 lb = 0.454 kg
(267.1kg)*(1 lb/0.454 kg) = 588.9 lbs
What is best illustrated by wattson and crick's ball-and-stick model of DNA
Answers
An unknown element is a mixture of isotopes ¹²⁹X and ¹³²X. The average atomic mass of X is 131.01 amu. What is the percent abundance of ¹³²X?
Answers
Answer: 67%
Explanation: The weighted averages of the two isotopes must add to 131.01. Let Y be the percentage of isotope 129. Then (1-Y) will be the percentage of isotope 132. The weighted average of each is:
129: 129Y
132: 132(1-Y)
Their sum is equal to 131.01
129Y + 132(1-Y) = 131.01
Y = 0.33, or 33%
(1-Y) = 0.67, or 67%
Check: 129*(0.33) = 42.57
132*(0.67) = 88.44
Sum = 131.01 It checks OK The 132 isotopes is 67% of the sample.
Considering the definition of atomic mass, isotopes and atomic mass of an element, the percent abundance of ¹³²X is 67%.
Definition of atomic massFirst of all, the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.
Definition of isotopeThe same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.
Definition of atomic massOn the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes. In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.
Percent abundance of ¹³²XIn this case, you know:
An isotope has an atomic mass of 132 amu and a percent natural abundance of y.An isotope has an atomic mass of 129 amu and a percent natural abundance of 1-y. The average atomic mass of X is 131.01 amuThen, the average mass of X can be calculated as:
132 amu×y + 129 amu×( 1-y)= 131.01 amu
Solving, you can find the percent abundance of ¹³²X:
132 amu×y + 129 amu×1 - 129 amu×y= 131.01 amu
132 amu×y + 129 amu - 129 amu×y= 131.01 amu
132 amu×y - 129 amu×y= 131.01 amu - 129 amu
3 amu×y= 2.01 amu
y= 2.01 amu÷ 3 amu
y= 0.67= 67%
Finally, the percent abundance of ¹³²X is 67%.
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Determine the molecular and empirical formulas of the following:
a. the organic solvent benzene, which has six carbon atoms and six hydrogen atoms.
b. the compound silicon tetrachloride, which has a silicon atom and four chlorine atoms and is used in the manufacture of computer chips.
c. the reactive substance diborane, which has two boron atoms and six hydrogen atoms
d. the sugar called glucose, which has six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.
Answers
Answer:
the answer is b im pretty sure
Explanation:
sorry if im wrong
The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex]. The empirical formula is also known as the simplest basic formula.
What is molecular formula ?A molecular formula is indeed a formula derived with molecules that corresponds to the total number of distinct atoms in the molecule of a chemical. A subscript inside a molecular formula denotes the number for each type of atoms in the substance's molecule.
The empirical formula provides the most basic formula for something like a compound, defined by the ratio between subscripts of the formula's smallest entire number of constituents. It is also known as the simplest basic formula. An empirical formula is the formula of a material given with the least integer subscript. The empirical formula for benzene is CH. The molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].
Therefore, the molecular formula for benzene is C[tex]_6[/tex]H[tex]_6[/tex].
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In the laboratory you dissolve 19.4 g of sodium chloride in a volumetric flask
and add water to a total volume of 375 mL.
What is the molarity of the solution? In M. What is the concentration of the sodium cation? In M. What is the concentration of the chloride anion? In M.
Answers
Answer: 0.885 M
Explanation: 19.4 grams of NaCl is (19.4g/58.55 g/mole) = 0.332 moles of NaCl. 375ml is 0.375 liters. Molar is moles per liter: (0.332 moles NaCl/0.375 liters) = 0.885 M
An unknown compound has the following chemical formula: where stands for a whole number. Measurements also show that a certain sample of the unknown compound contains of magnesium and of chlorine. Write the complete chemical formula for the unknown compound.
Answers
Answer: This is only a guess: The "following chemical formula: " doesn't appear on my screen. But since you mentioned Mg and Cl, I would guess MgCl2
Explanation: Mr loses 2 electrons while each Cl gains one each: Two chlorines for every 1 magnesium.
What is true of an element that is oxidized?
It increased in electronegativity.
It decreased in electronegativity.
It gained electrons.
It lost electrons.
Answers
Answer:
When an element is oxidized, it loses electrons
Answer:
The last option is the correct answer.
Explanation:
When an element is oxidized, it loses electrons. But when an element is reduced, it gains electrons. This is the basis of redox reactions.
However, an oxidizing agent oxidizes something else, and gets reduced, therefore gaining electrons. Meanwhile, a reducing agent reduces something else, and gets oxidized in the process, losing its own electrons.
Which of these can be mined from earth and used as an energy source?
A.Get rid of the waste and extra fluid
B.Ureters
C.Coal
D.Bladder
Answers
coal
Which of these can be mined from earth and used as an energy source?
A.Get rid of the waste and extra fluid
B.Ureters
C.Coal
D.Bladder
ans is coal
13. Find the total number of atoms present in the following molecules. a. 5 H₂O b. Zn Cl₂
Please
Answers
Answer:
5H²O= 23
ZnCl²=135
have a great day
a. 5 H₂O
b. Zn Cl₂
20,000 $ give a way but answer this first
Plz
12.Write the basis of naming of the following elements. 1.Neptunium,2.Mendelevium,
Answers
Answer:juhygjdkeExplanation:
Mendelevium is named for Dmitri Mendeleev who produced one of the first periodic tables.
Abelson first found neptunium in 1940 after uranium had been bombarded by neutrons from the cyclotron at Berkeley, California. ... The element was named after the planet Neptune, which is the first planet beyond Uranus.
Answer in explanation
Explanation:
neptunium was named after the discovery of the planet neptune in september 23 1846
mendelevium was named as dimitri mendeleev
why would methane attain a tetrahedral structure?
