Answer: Ture
Explanation: A small standard deviation means that the data is more clustered around the mean (More reliable).
The Ksp of mercury(II) hydroxide, Hg(OH)2, is 3.60×10^−26 . Calculate the solubility of this compound in grams per liter.
The solubility of the compound is obtained as 9.5 * 10^-14 M.
What is the solubility product?The solubility product refers to the equilibrium constant that shows the extent to which a thing is soluble in water, Now we can write the solubility product as;
Ksp = [Hg^2+] [2OH^-]^2
Let [Hg^2+] = [OH^-] = x
Then I can write;
Ksp = x * (2x)^2
Ksp = 4x^3
When x = solubility
x = ∛Ksp/4
Ksp = 3.60×10^−26
x = ∛ 3.60×10^−26/4
x = 9.5 * 10^-14 M
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Which phrase best describes electronegativity?
The phrase which best describes electronegativity is the relative strength with which an element attracts electrons in a chemical bond and is denoted as option A.
What is Electronegativity?This is referred to as the chemical property which is possessed by an element that involves its tendency to attract electrons especially during chemical bond formation.
Electronegativity increases from bottom to top in groups, and increases from left to right across periods in the periodic table and are influenced by factors such as number of valence electrons etc.
This is usually done so that they can achieve a stable octet configuration which results in the bonds being formed and the new substance being produced thereby making it important in a chemical reaction.
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The options are:
the relative strength with which an element attracts electrons in a chemical bond.the partial charge an element carries in a covalent or ionic bond.the number of electrons an element has.the number of electrons an element shares in an ionic bond.I need help with this question
Answer:
I think It's the 2nd "There are two compounds present"
In Chemistry we look at the composition and the_____of matter
What chemical reaction takes place when removed from bond( as shown above)?
Answer:
Dehydration synthesis involves the formation of new chemical bonds between two molecules which leads to the formation of new compounds. A reaction occurs with the loss of water molecules at each step.
What is the volume of a metal with the mass of 24.6 g and a density of 4.0 g/mL?
The volume of a metal with mass of 24.6 g and a density of 4.0 g/mL is 6.15mL.
How to calculate density?The density of a substance is a measure of the mass of matter contained by a unit volume. It is measured in grams/litres.
The density can be calculated by dividing the mass by its volume as follows:
Density = mass ÷ volume
According to this question, a metal has a mass of 24.6 g and a density of 4.0 g/mL. The volume can be calculated as follows:
Volume = 24.6g ÷ 4g/mL
Volume = 6.15mL
Therefore, the volume of a metal with mass of 24.6 g and a density of 4.0 g/mL is 6.15mL.
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whats defination isomer
Answer:
Isomer
1.
CHEMISTRY DEFINITION
each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.
2.
PHYSICS DEFINITION
each of two or more atomic nuclei that have the same atomic number and the same mass number but different energy states.
Explanation:
Brainliest pls thank you have a good day bye bye
Answer:
each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.
Explanation:
Draw the structures of the products of the neutralization reaction between hydroxide ion and acetic acid
Answer:
CH3COOH + OH- ----> CH3COO- + H2O
A Se ion has a mass number of 77 and a charge of −2
. Determine the number of neutrons, protons, and electrons in this ion.
number of neutrons:
number of protons:
number of electrons:
Answer:
neutrons = 71
protons = 6
electrons = 6
Explanation:
Hope this works :)
Write each of the following numbers to 3 significant figures in non-exponential notation
(Do not include a decimal point for numbers greater than 1.)
5.95 x 10^-3
7.33 x 10^4
4.09 x 10^3
9.15 x 10^-5
5.95 x 10^-3 = 0.006
7.33 x 10^4 = 73,300
4.09 x 10^3 = 4090
9.15 x 10^-5 = 0.000
Calculation of significant figuresTo calculate the significant figure for a given mathematical expression means to represent the end value to specific number of digits that are accurate.
The given figures are in scientific or exponential notation but to convert them to 3 significant figures the following steps are taken:
If it's a number that is less than one, there must be three digits before decimal point as seen in 0.006.If it's a number greater than one, it must contain three significant digits such as 73300.Therefore three significant figures of the expressions given include the following:
5.95 x 10^-3 = 0.006
7.33 x 10^4 = 73,300
4.09 x 10^3 = 4090
9.15 x 10^-5 = 0.000
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How do you dispose material that decay?
Answer:
compost at home it can reduce the amount of food you throw in the trash
Explanation:
can make a greater envoirment and is very eco friendly
03 Question (1 point)
A
pot of water on a stove is heated to a rapid boil. What is the the gas inside the bubbles that form in the boiling water?
1st attempt
Choose one or more:
air
H2(g)
□ O2(g)
OH2O(g)
See par
lid See Periodic Table
The gas inside the bubbles that form in the boiling water is H₂O(g).
The gas inside the bubbles that form in the boiling water is mostly water vapor. The bubbles in the water vapor start to form on nucleation sites. The water vapor bubbles start to form larger as the temperature increases because more liquid is being converted to gaseous form. Vapor-filled bubbles shrink and disappear completely.
Therefore, when water is boiling the physical state of water, liquid changes to another state of water which is gaseous.
Hence, the bubble that we see in boiling water is the gaseous form H₂O(g) of water.
The boiling water is the vaporous form H₂O(g) of boiling water.
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Question 3
A piece of metal with a mass of 15.45 g is added to 21.27 mL of water in a
graduated cylinder. The water level rises to 24.78 mL. The density of the metal
is
g/mL.
Hint: You need to apply the significant figure rule for subtraction first; then apply
the significant figure rule for division. Do not round until the end!
Enter your answer as number without a unit.
The density of the object is 4.4 g/mL.
What is density?The term density refers the ratio of the mass of the mass to the volume of a body. The density of a body is a constant as it does not change irrespective of the mass or the volume of the object in at any given time. We have now been told that the former volume of the water was 21.27 mL. The addition of the object increased the volume of the object to about 24.78 mL.
Let us recall that is common to obtain the volume of a solid by the displacement method. The volume of the substance before and after the addition of the solid is recorded. The volume of the solid is taken to be the volume of the liquid that is displaced since the solid must displace its own volume of liquid.
Hence we have;
Mass = 15.45 g
Volume = 24.78 mL - 21.27 mL = 3.51 mL
Density = 15.45 g/3.51 mL
= 4.4 g/mL
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How many silver atoms are there in 3.74 g of silver?
Express your answer using three significant figures.
2.01214904 × 10²² silver atoms are there in 3.74 g of silver
The most common isotope of silver has 60 neutrons, 47 protons, and 47 electrons. Silver is a soft metal with a glossy metallic luster under normal circumstances. It is exceedingly malleable and ductile (can be formed into a wire).
The molar mass of silver is as follows:
Molar mass of Ag = 107.8682 g/mol
The number of atoms in a molar mass is Avogadro’s number:
6.022140857 × 10²³
Therefore 3.8 g of silver contains 3.8 times 6.022140857 × 10²³ divided by 107.8682 that equals 0.03522818 times
6.022140857 × 10²³
= 2.01214904 × 10²² atoms.
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Phosphorus combined with hydrogen to form phosphine. Compare, in terms of matter, phosphorus and phosphine.
An IV is prepared to deliver 2.00 L of a saline solution to a patient with a drop factor of 60.0 gtt/mL and a drip rate of 115.0 gtt/min. How many hours will it take to deliver all of the solution?
2 hour 30 minute it take to deliver all of the solution
Normal saline is a cornerstone of intravenous solutions commonly used in the clinical setting IV saline to replenish lost fluids, flush wounds, deliver medications, and sustain patients through surgery, dialysis, and chemotherapy and saline IV have even found a place outside the hospital, as a trendy hangover remedy
Here given data is IV saline solution deliver = 2.00 L and drop factor = 60.0 gtt/mL and drip rate = 115.0 gtt/min.
We have to calculate hours = ?
So for calculating hours
Time = volume × drip rate
Time = 2.00 L × 115.0 gtt/min
Time = 230 means 2hours 30 minute
2 hours 30 minute will it take to deliver all of the solution
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Which procedure could be used to demonstrate that matter is conserved during a chemical change or reaction?
1. Suppose 10 atoms of carbon (C) tear with 20 atoms of (O)….
B. 30
2. Which procedure could be used to demonstrate that matter is conserved during a chemical reaction?
B. Find the mass of an acid and a base. Combine them to produce water and salt. Find the mass of the water and salt.
3. What is always true according to the law of conservation of matter?
A. Atoms can be rearranged during a chemical reaction but cannot be added or taken away.
4. A student combines 2 liquids in a beaker…
B. The reaction produced a Gas that escaped the beaker
CAN SOMEONE PLEASE HELP ME WITH THIS!!! JUST EXPLAIN TO ME HOW TO GET THE ANSWER BC I ALREADY KNOW IT THATS ALL
1) The mass of the object is 18 g
2) The correct relationship is option C
What is density?Density is the ratio of the mass to the volume of a body. We know that the density of the body is an intrinsic property. This implies that it does not change with the amount of substance or with the mass of the body. Let us now try to solve each of the problems.
1) Density = mass/volume
Volume = 1 cm * 3 m * 2 cm = 6 cm^3
Density of the body = 3 g/cm^3
Mass of the body = 6 cm^3 * 3 g/cm^3 = 18 g
2) To answer question 2, we have to remind ourselves of what we said that the density is the ratio of the mass to the volume of a body and that the density of a body is constant. This implies that the relationship that defines the relationship of the mass to the density of the material does not change and this is shown by option C.
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What is the importance of Steriochemistry in the field of medicine?
Answer:
Stereochemistry is of critical importance to drug action because the shape of a drug molecule is an important factor in determining how it interacts with the various biological molecules (enzymes, receptors, etc.) that it encounters in the body.
A new linear temperature scale, degrees Zunzol ( ∘Z ), is based on the freezing point and boiling point of a newly discovered compound zunzol. The freezing point of zunzol, −117.3 ∘C, is defined as 0 ∘Z, and the boiling point of zunzol, 78.4 ∘C, is defined as 100 ∘Z. What is the freezing point of water in degrees Zunzol?
The boiling point of water in Zunzol is 59.9∘Z.
What are fixed points?A thermometer must have two fixed points, the upper fixed points and the lower fixed point. The upper fixed point corresponds to the boiling point while the lower fixed point corresponds to the melting point.
Having that;
x - 0/100 = 0 - (-117.3)/78.4 - (-117.3)
x/100 = 117.3/195.7
195.7x = 117.3 * 100
x = 117.3 * 100/195.7
x = 59.9∘Z
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a. What are the four states, or phases, of matter? Describe the shape and volume properties of each phase. Can they change, or are they fixed? i. _______________________ Shape: Volume: ii. _______________________ Shape: Volume: iii. _______________________ Shape: Volume: iv. _______________________ Shape: Volume:
The four states or phases of matter are:
LiquidSolidGasPlasmaLiquid: This state or phase of matter has no definite shape. It takes the shape of the container.
Liquid has a fixed volume: The particles of liquid are held close togetherSolid: Solid has a definite volume and shape
This means that matter in the solid state takes the shape of whatever container it is.If it takes the shape of its container, it then means that it also has a fixed volume.Gas: Neither a definite shape nor volume.
This means that gas as a state of matter has no definite shape. It has also no definite volumePlasma: No fixed shape or volume.
They are usually denser than solid or liquids.It has no fixed shape and volume What is matter?Matter can simply be defined as anything that has mass and occupies space. There are four major States or phases of matter. These are: Solid, liquid, gas and plasma.
So therefore, the four states or phases of matter are:
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how many mm are equal to 4.75x10^-2 m
Answer:
47.5 millimeters
Explanation:
What is the percent by mass of Ca in CaCl2?
The percent by mass of Ca in CaCl2 is 36 percent
mass of Ca = 40 gram
mass of CaCl2 = 35.5 x 2 = 111 gram
percent by mass of element = molar mass of element/mass of compound x 100
percent mass of Ca = 40/111 = 36 percent
What is mean by percent by mass ?The concentration of an element in a compound or component in a mixture can be expressed, for example, as a mass percentage. The mass of a component is divided by the entire mass of the combination, then multiplied by 100%, to compute the mass percentage. Other Names: mass percent, (w/w)%
With the aid of this formula, one can determine the lowest entire number of moles and the proportional number of atoms of each element present in a compound. The true molecular formula can be calculated by chemists using the empirical formula. The number of atoms in the compound are specified in this formula.Learn more about Percent by mass here:
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A 2.64 L aqueous solution of KOH. The solution has a density of 1.29 g/mL.
Calculate the molarity, Molality, and mass percent concentration of the solution.
The molarity of the solution is 0.023 M and the molality of the solution is 17.9 m.
What is the molality?The concentration of a solution is defined as the amount of substance in a solution. Now we are told that we have a solution of 2.64 L aqueous solution of KOH. The solution has a density of 1.29 g/mL.
Density of the solution = 1.29 g/mL
Volume of the solution = 2.64 L
mass of the solution = 1.29 g/mL * 2.64 L = 3.4 g
Number of moles of the solute = 3.4 g/56 g/mol = 0.061 moles
Molarity = 0.061 moles/2.64 L = 0.023 M
Molality of the solution = 0.061 moles/3.4 * 10^-3 Kg = 17.9 m
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Which of the following contains as many atoms as 18 g of water, H₂O?
a) one mole of nitrogen, N2
b) two moles of nitrogen, N2
c) two moles of sodium chloride, NaCl
d) three miles of zinc, Zn
Identify the nuclide produced when carbon-14 decays by beta emission: 14 6C→ 0−1e + ?
This nuclear reaction would give Boron - 14 as the product.
What is beta emission?A beta emission has to do with the transformation of a proton to electron. This occurs with the change in the atomic number of the element. In this case, the parent nucleus that undergoes decay is carbon - 14.
The daughters nucleus will have the same mass number but a different atomic number. Let us now see the product of this reaction.
From the equation shown, this nuclear reaction would give Boron - 14 as the product.
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29) The existence of electrons in atoms of all elements was demonstrated by
A) Millikan's oil drop experiment.
B) Rutherford's gold foil experiment.
C) Thomson's cathode ray tube experiment.
D) None of the above.
Answer:
c Thomson's cathode ray tube experiment
What is the rule for translating the point 3 units to the right?
1. (x,y+3)
2. (x+3,y)
3. (x,y−3)
4. (x−3,y)
Answer:
Second option
Explanation:
(ii) An element A is in period 3 and it loses three electrons to form an ion. (a) Write the electronic configuration of atom A. (B) Calculate the number of atoms in element A if it has a mass of 27.0g.[5.022x10^23] (c)What is the name of the ion formed?
The aluminum ion, Al3+, is produced when an aluminum atom loses three electrons, and the magnesium ion, Mg2+, is produced when a magnesium atom loses two electrons. Atoms of elements that lose electrons gain a positive charge.
The three valence electrons in aluminum are lost, forming a cation with a positive charge of three: These cations have names that correspond to the metals that they are made of the octet rule is not always followed by transition elements and the metals to their right; frequently, they create more than one cation. Ionization is the process by which ions are created when an atom or molecule gains or loses an electron.
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when is science meaningful?