Obtain a flask that is thoroughly cleaned and dried. Cap the flask and invert several times to thoroughly mix the solution are listed below.
What is volume ?
Volume, a three-dimensional quantity, is used to calculate the capacity of a solid shape. In order to calculate how much space a closed figure can occupy in three dimensions, volume is utilized. An example would be the space or shape that a substance, such as a solid, liquid, gas, or plasma, occupies. In addition, the cubic meter deriving from the S.I. is widely employed to quantify volume.
What is deionized water ?
Demineralized water, also known as DI water or DM water, is occasionally used interchangeably with DEI water. Most of the ions are no longer present in the water. Ions are atoms or molecules that are either positive ions (which are called cations) or negative ions (which are called anions) depending on the ratio of electrons to protons (called a cation).
Steps in preparation of dilute solution from a stock solution
1 Obtain a flask that is thoroughly cleaned and dried
2 Add the desired amount of stock solution
3 Add deionized water until the volume reaches the mark on the flask
4 Cap the flask and invert serval times to thoroughly mix the solution
If a student accidentally adds deionized water past the calibration mark on a volumetric flask she should start over and make an entirely new solution. Because it is calibrated for the particular volume if excess deionized water is added it gives wrong values(errors) in titration.
Therefore, Obtain a flask that is thoroughly cleaned and dried. Cap the flask and invert several times to thoroughly mix the solution are listed above.
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How many grams are in 562 dg?
Answer:
56.2 g
Explanation:
describe how mike seperates the unreacted magnesium from the magnesium sulfate solution.
The method for extracting magnesium from magnesium sulphate solution described in the invention includes the following steps: decreasing stress.
How can magnesium be extracted from magnesium sulphate?The technique described by the invention includes the following steps to recover magnesium from the a magnesium sulphate solution: Calcium sulphate, which is employed as a seed crystal, is mixed with cao and/or calcium hydroxide in (A), and magnesium sulphate solution is mixed with the ca(oh)2 and/or calcium hydroxide combination in (B).
What method of separation is applied to magnesium sulphate?The most favoured method for separating the halite crystals from the magnesium sulphate crystals after milling is elutriation. This method involves pumping air into a container(19) containing a mixture very coarse halite and fairly fine magnesium.
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2. 79.836 g of a compound are analyzed. The compound is composed of 70% of iron and 30%
oxygen. What is the empirical formula of the new compound?
a. Moles of Iron-
b. Moles of Oxygen-
c. Mole ratio-
d. Empirical formula-
e.Molar mass of compound-
The empirical formula of the new compound is:
a. Moles of Iron ⇒ 0.99b. Moles of Oxygen ⇒ 23.9c. Mole ratio ⇒ 2 : 3d. Empirical formula ⇒ Fe₂O₃.e. Molar mass of the compound ⇒ Fe = 55.9 g and O = 23.9 gThe empirical formula is the chemical formula of a compound that shows the type of atom and the simplest ratio of the number of atoms in the compound. The ratio of the moles of atoms is the same as the ratio of their index numbers in the compound.
mass of compound = 79.836 g,
then the mass of Fe = 70% x 79.836 g = 55.9 g
mass of O = 30% x 79.836 g = 23.9 g
nFe : nO = mass Fe/ArFe : mass O/ArO
nFe : nO = 55.9 g/56 : 23.9 g/16
nFe : nO = 0.99 : 1.4
nFe : nO = 1 : 1.5
nFe : nO = 2 : 3
So, the empirical formula of the compound is Fe₂O₃.
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What is the minimum temperature required for pork in hot holding?
Pork must be held in hot holding at a minimum temperature of 135°F.
Between 42°F and 134°F, food is deemed to be in the "Danger Zone". The microorganisms that cause food related disease grow swiftly in food stored in the "Danger Zone" temperature range. Foods that are kept hot must always be kept at 135 degrees or higher.
The recommended storage temperature for hot meals is 135 degrees Fahrenheit or higher. Here are some suggestions for keeping hot meals safe: Never reheat food in a hot holding appliance. Food should be cooked to a safe temperature before being stored. Aseptic canning, also known as high-temperature-short-time (HTST) processing, is the process of filling presterilized containers with a sterile, cooled product and sealing them in a sterile environment with a sterile cover.
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What type of elements do form ionic bonds and whyexplain why an ionic bond cannot be formed between the atoms of the same element
The ionic bonds formed in between the metals and non metals. The ionic bond is formed in between the atoms by the complete transfer of electrons.
The ionic bond is formed between the metal , which has ability to donate the electrons and the non metals , which has the tendency to accept the electron pair. The ionic bond is formed by the complete sharing of the electrons. The ionic bond cannot be formed between the atoms of the same elements because the atoms with the same electronegativity shares the electrons and form the covalent bond.
The example of the ionic bond is NaCl.
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How do you find velocity with kinetic energy?.
Answer:
By making change of subject.
Explanation:
kinetic energy =1/2×mass×velocity²
since we're finding for velocity
we will make velocity the subject.
velocity² = 2×kinetic energy
m
You will square both sides
Given,
velocity = square root of 2× kinetic energy/ m. Or you will live the formula as how it is and place the value of the question to find velocity.
How many molecules are in 2. 50 moles of o2?.
There are 1.5055 x10²⁴ molecules in 2. 5 mol of O₂
Multiply the number of moles by the Avogadro constant to get the total number of atoms or molecules in a sample. The equation reads as follows:
number of molecule= moles x avogadro's number
An equal amount of different gases measured at the same pressure and temperature each have the same number of molecules, and one mole of material has 6.022x10²³ atoms.
number of molecule= moles x avogadro's number
number of molecule= 2. 5 mol x 6.022x10²³
number of molecule= 1.5055 x10²⁴
Therefore, there are 1.5055 x10²⁴ molecules in 2. 5 mol of O₂
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how many atoms are contained in 1 mole of hydrogen molecule
The number of atoms contained in 1 mole of the hydrogen molecule is 12.044 x 10^23.
The International System of Units uses the mole as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022 × 10^23 elementary entities.
The molecular formula for hydrogen is H2. So there are two atoms in the molecule of hydrogen. One mole of hydrogen molecule contains 6.022x10^23 hydrogen molecules.
This number 6.022×10^23 is called Avagardo Number. This is a constant value. Since there are two hydrogen atoms in a hydrogen molecule hence, one mole of H2 molecule contains (2 x 6.022 x 10^23 = 12.044 x 10^23) atoms.
Therefore, The number of atoms contained in 1 mole of the hydrogen molecule is 12.044 x 10^23.
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polyatomic ions can a group of atoms have a charge ?answer key
A polyatomic ion, which is a grouping of atoms, can indeed have a charge. Monatomic ions have a charge due to an imbalance in the number of protons and electrons for the same reason.
Polyatomic ions are made up of two or more atoms that are covalently bonded, much to the structure of a neutral molecule. This cluster of covalently bonded atoms has different ratios of electrons to protons, as the name suggests. The terms "atomic ion" or "monatomic ion" can be used to refer to an ion that is made up of of one particular type of atom, with each atom having some sort of net charge, either positive or negative. the case where an ion has two or more atoms.
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Which is the larger particle. Na (a) or Na+ (b)
The larger particle is Na (a) and not Na+ (b).
What is an atomic particle?All matter consists of atoms that contain a nucleus and orbiting electrons. The nucleus consists of two kinds of atomic particles called protons and neutrons, collectively known as nucleons.
The protons has a mass of 1.67 × 10−27 kg and a positive electronic charge of 1.6 × 10−19 coulombs (C).
So from the question, The atomic number of Na is 10 and electrons' count is also 10. The atomic number of Na+ is 10 and electrons' count is 9.
This means that In Na+, the same effective nuclear charge is acting on less number of electrons compared to Na. so, the attraction will be more.
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whats a hypothesis for viscosity
Answer:
Explanation:
A hypothesis for viscosity could be that the viscosity of a fluid is directly proportional to its temperature. This means that as the temperature of a fluid increases, its viscosity will decrease, and as the temperature decreases, its viscosity will increase.
What is the formula for velocity Mcq?.
Answer:
The correct formula is v = x/t. Average velocity is total change in displacement divided by total change in time. v = dx/dt is the formula for instantaneous velocity. 3.
Explanation:
(◕ᴗ◕✿)(◕ᴗ◕✿)(◕ᴗ◕✿)
when using a pipet, how far does the pipet bulb need to be inserted onto the end of the glass pipet?
when using the pipet, the pipet bulb need to be inserted onto the end of the glass pipet , it should insert the tip into the beaker that it is about 1/4th from bottom.
The pipet is used to transfer the measured liquid. The pipet is accurate as the burette. The pipet tip when immersed in the liquid , its tip just below the liquid's surface of about 2 mm to 3 mm. Pipette is the laboratory tool that is commonly used in the chemistry and biology.
The main and the important function of the pipet is to measured and transfer the small quantity of the liquid.
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How do you calculate 1 mole in grams?.
To calculate the mass of one mole in grams, you multiply the molar mass of the substance by Avogadro's number, which is 6.022 x 10²³. For example, the molar mass of water is 18.02 g/mol, so one mole of water would be 18.02 x 6.022 x 10²³= 1.080 x 10²⁴ grams.
A mole is a unit of measurement in chemistry that is used to express the amount of a substance. One mole is equal to Avogadro's number, which is 6.022 x 10²³ atoms, ions, or molecules.
To calculate the mass of one mole in grams, you multiply Avogadro's number with the molar mass of the substance in grammes per mole (g/mol). For example, the molar mass of water is 18.02 g/mol, so one mole of water would be 18.02 x 6.022 x 10²³ = 1.080 x 10²⁴ grams. This conversion factor is useful in determining the mass of a substance needed to react with another substance in a balanced chemical equation.
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What is a reason WHY Jörg Wiedenmann put corals into warm water in his lab?
Most reef-building corals contain photosynthetic cells, called zooxanthellae, that live in their tissues.
WHY Jörg Wiedenmann put corals into warm water in his lab?
Corals get their food from algae living in their tissues or by capturing and digesting prey. Most reef-building corals have a unique partnership with tiny algae called zooxanthellae. The algae live within the coral polyps, using sunlight to make sugar for energy.Heat stress can lead to the loss of algae that live in symbiosis with corals, resulting in a white appearance (bleaching) and, potentially, the loss of reefs.Not all corals live in warm water – in fact, over half of all known coral species are found in cold, deep, and dark waters. Dense fields of Lophelia pertusa, a common deep-sea reef-building coral, found on the Blake Plateau knolls.To learn more about coral refers to;
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Which is structural isomer of 3-ethyl-3-methylhexane? 3.3 diethyloctane 2,2.3,3 tctramethylpentane 2,7-dimethyloctane 2.8-dimethylnonane
2,2,3,3-tetramethylpentane is the structural isomer of 3-ethyl-3-methyl hexane.
What is a structural isomer?
Structural isomers are isomers in which the atoms are completely different in order but have the same molecular formulas.
These are molecules with the same molecular formula but different connectivity depending on the order in which they are assembled.
The structure of Alkane (C4H10) is a simple example of a structural isomer with multiple isomers.
According to the International Union of Pure and Applied Chemistry (IUPAC), structural isomerism is also known as constitutional isomerism. It is a type of isomerism in which molecules with the same molecular formula but different orders and bonding, as opposed to stereoisomerism.
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a molecule composed of a metal atom and a nonmetal atom
A molecule composed of a metal atom and a nonmetal atom is known to be an 'ionic compound'.
Ionic compounds are usually formed when a metal reacts with a nonmetal. An ionic compound is formed between metal atoms and non-metal atoms, where the atom of metal loses an electron to complete its octet, and the atom of non-metal gains that electron to complete its octet. The resulting ionic compound has a stiff, strong, and frequently crystalline solid bond structure. The most common example of an ionic compound is NaCl (sodium chloride).
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What is the kinetic energy of a 10 kg object moving with a velocity of 2m s?.
Answer:
kinetic energy = 20jouls.
Explanation:
From the question
Mass = 10kg
velocity = 2m/s
kinetic energy = ?
kinetic energy is giving by the formula
=1/2 ×mass× velocity²
=1/2 ×10 × 2²
=5 × 4
=20j
Therefore kinetic energy = 20jouls.
If 2g of zinc granule wa reacted to evolve hydrogen ga which come to completion after 5min. Calculate the rate of reaction in ghr-1
The chemical reaction is occurring at a rate of 25 g/hr.
The pace at which a chemical reaction occurs is known as the reaction rate or rate of reaction. It is proportional to the rise in product concentration per unit time and the fall in reactant concentration per unit time. Reaction times can differ wildly.
The term "rate of reaction" describes how quickly reactants are consumed or how quickly products are produced.
Consequently, the following is the formula for the rate of reaction:
- Time taken/Mass of Reactant Used Up Determines Reaction Rate...
(1)
Reactant mass used up=2g
It took 5 minutes.
The minutes to hours conversion is as follows:
t(hour)=5 min × 1 hour / 60 min equals 0.08 hours
Equation (1) should be changed by substituting the following values:
rate of reaction = 0.2g / 0.08 hours
As a result, the chemical reaction's rate is 25 g/hr.
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Complete Question -
If 2g of zinc granules was reacted with excess dilute HCl to evolve hydrogen gas which came to completion after 5 minutes. Calculate the rate of the chemical reaction in g/hr. Please please please answer quickly
What is the value of 2 in H2O?.
Answer:
2 of hydrogen (H)
Explanation: Because it says h is for hydrogen and 2
Is C2Cl4 a nonpolar molecule?.
A nonpolar compound is tetrachloroethylene (C2Cl4). Each of the C-Cl bonds in C2Cl4 has a dipole moment, but as the molecule is planar symmetrical, it has no net dipole moment.
Tetrachloroethene, a NON-polar, fully symmetrical molecule similar to C2Cl4, is used to DRY CLEAN clothing because it draws non-polar grease stains that polar water molecules are unable to properly remove. The technique of dry cleaning is NOT at all dry (C₂Cl₄ is a liquid).
Since there is not a significant difference in electronegativity between carbon and hydrogen, the majority of hydrocarbons are non-polar in nature. A covalent link holds the atoms of carbon and hydrogen together. C₂H₄ is non-polar by nature because of this. C₂H₄ is hence non-polar.
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How much energy do data centers consume?.
According to recent surveys, data centers worldwide consume up to 3 percent of all electrical energy generated worldwide.
Data centers are responsible for a significant portion of the world’s energy consumption. This number is expected to grow as the demand for data storage and compute power continues to increase.
Data centers also need a steady supply of cooling to keep the equipment running efficiently, adding additional strain on the energy grid.
To make the most of this energy, data centers are increasingly turning to renewable energy sources such as solar and wind, as well as cutting-edge technologies such as artificial intelligence and machine learning to reduce consumption.
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using a ph meter, you find the ph of an unknown solution to be 8.0. how would you describe this solution?
This solution is basic, meaning that it has a pH greater than 7.0. This means that there are more hydroxide (OH-) ions than hydrogen (H+) ions in the solution, creating an alkaline solution.
What is alkaline?Alkaline is a term used to describe a substance with a pH greater than 7. Alkaline substances are considered basic, as opposed to acidic substances which have a pH of less than 7. Baking powder, milk of magnesia, and soap are examples of common alkaline compounds. Alkaline solutions are used in a variety of industries, such as food processing, chemical manufacturing, and pharmaceuticals. Alkaline solutions can be used to neutralize acidic substances, adjust pH levels, and increase the solubility of certain compounds. Additionally, alkaline solutions can be used to remove odors, stains, and grease from surfaces. Alkaline solutions can also be used in water treatment plants to reduce acidity levels and increase the effectiveness of chlorine.
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Please help…. I don’t get any of this :(
Alex and Sam's bike have more chance to get rusted tan others especially Sam.
Why are aluminum bike frames used?
Aluminum is the most popular material used for bike frames and is renowned for having a high strength-to-weight ratio, being relatively light (though often not as light as carbon fiber), and being corrosion resistant. It is a well-liked option for riders and racers on a budget because it is also fairly priced.
A titanium frame doesn't need to be protected because a thin oxide coating builds on it to prevent further oxidation. A bare aluminum frame is more susceptible to oxidation and is hence more vulnerable to salt air. Steel is quickly oxidized. Paint is required to protect steel and aluminum frames from corrosion, however with time, paint deteriorates and cracks, exposing the frame.
Since bike chains are composed of steel, they require more frequent cleaning and lubrication than they would in a dry environment. Although the superior brake and shifter components are anodised, salt air will eventually penetrate the aluminum's surface treatment.
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The pH of dil.Hcl is____ and the solution is_____
Answer:
pH of HCl solution is 1.52, which suggests that dilute HCl solution is very acidic in nature.
which law states that volume increases with temperature?
In accordance with Charles' Law, for a given quantity of gas under a constant pressure, the volume of the gas varies in a direct proportion to its absolute temperature.
What exactly are Boyle's Law and Charles Law?As the pressure lowers, the gas volume rises according to Boyle's Law. According to Charles' Law, as a gas's temperature rises, its volume expands.In accordance with Charles' Law, for a given quantity of gas under a constant pressure, the volume of the gas varies in a direct proportion to its absolute temperature. Utilizing the Kelvin scale, the absolute temperature is calculated.Charles' law states that when the temperature of a gas is raised while keeping the pressure constant, the volume of the gas also rises.In accordance with Charles' Law, for a given quantity of gas under a constant pressure, the volume of the gas varies in a direct proportion to its absolute temperature.To learn more about Charles' Law refer to:
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Hello can someone please help with this it on Construction Notes and Bill Nye. HELP PLEASE
1. A suspension __________________________ is a structure.
2. Tension is the push / pull on an object, for example a rope (circle one).
3. Just about__________________________ is a structure.
4. Structures have form and__________________________.
5. The force of weight in __________________________ and domes is spread out.
6. Bowls, stadiums, and The Capitol are examples of__________________________.
7. Hammers and other tools are / are not structures (circle one).
8. Structures need support / relief to keep them up (circle one).
9. The part of a flag that is in tension is the_________________________.
10. ____________________ bricks make good structures.
The answers are:
A suspension bridge is a structure.Tension is the pull on an object, for example a rope.Just about everything is a structure.Structures have form and function.The force of weight in arches and domes is spread out.Bowls, stadiums, and The Capitol are examples of domes.Hammers and other tools are not structures.Structures need support to keep them up.The part of a flag that is in tension is the rope.Solid bricks make good structures.What are the statements about?A suspension bridge is a type of structure that is supported by cables or chains that are attached to towers. The cables or chains are under tension and the roadway is suspended from them. Suspension bridges are typically used to span large distances, such as over rivers or valleys.
Tension is the pull on an object, for example a rope. It is a force that tries to stretch or elongate an object. In the context of structures, tension is an important factor that engineers need to consider when designing and building structures.
Therefore, Just about everything can be considered a structure if it has a form and serves a purpose. A structure can be a man-made object such as a building, bridge, or dam, or a natural feature such as a mountain or a cave.
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When magnesium (mg) metal is burned in the presence of oxygen (o2), magnesium oxide (mgo) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is.
Magnesium oxide (MgO) is created as a Compound when magnesium (Mg) metal is burnt in the presence of oxygen (O2).
Describe a compound.A compound is a chemical that is created when two or more other substances are combined. When substances interact, they generate compounds by forming bonds and joining together. Fixed ratios are used to blend the chemical components.
Magnesium oxide is a chemical that is created when magnesium (metal) and oxygen (O) are united. In this combination, the proportions of magnesium and oxygen are equivalent. These elements' various traits came together to create this compound property.
The total number of atoms in a compound's molecule is indicated by the molecular formula.
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When a 15. 0 g ring aborb 35. 0 J of heat, it temperature increae by 10 degree celiu. The ring i mot likely made of?
Answer:
Gold in a wedding ring
Explanation:
I think this is the answer. Im sorry if its wrong
The number of significant figures in a value is a display of the _________ of a measurement.
A. precision
B. accuracy
C. both precision and accuracy
D. none of the above
Answer:
Number two answer is accuracy
