How many kilograms of HF are needed to completely react with 7.01 kg of UO2?

It's not going to react in test tube #2 because D) the liquid in test tube #2 was catalase.

Catalase is an enzyme that is an antioxidant and its function is the deamination of hydrogen peroxide into oxygen and water. This enzyme needs a heme group and manganese as a cofactor. So that's why tube #2 will not have a reaction (foaming) since it will contain catalase that catalyzes hydrogen peroxide.

Therefore, we can confirm that it's not going to react in test tube #2 because D) the liquid in test tube #2 was catalase.

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Taking into account the reaction stoichiometry and the ideal gas law, the volume of O₂ obtained is 26.199 L.

In first place, the balanced reaction is:

2 KClO₃ → 2 KCl + 3 O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

The following rule of three can be applied: if by reaction stoichiometry 245.1 grams of KClO₃ form 3 moles of O₂, 87 grams of KClO₃ form how many moles of O₂?

moles of O₂= (87 grams of KClO₃× 3 moles of O₂)÷ 245.1 grams of KClO₃

moles of O₂= 1.065 moles

Assuming ideal gas behavior and knowing:

the volume of O₂ obtained is calculated by the ideal gas law:

1 atm×V = 1.065 moles× 0.082 [tex]\frac{atmL}{molK}[/tex]× 300 K

Solving:

V= (1.065 moles× 0.082 [tex]\frac{atmL}{molK}[/tex]× 300 K)÷ 1 atm

V= 26.199 L

Finally, the volume of O₂ obtained is 26.199 L.

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1 mole of any substance contains 6.022×[tex]10^{23}[/tex] particles

Therefore,

0.18516 mol of nitrogen contains = (0.18516 mol) × (6.022 x [tex]10^{23}[/tex]) = 1.115×[tex]10^{23}[/tex] nitrogen atoms = 1.1×[tex]10^{23}[/tex] atoms of N.

Hence, in 10.0g of [tex]N_{2} O_{5}[/tex], 1.1×[tex]10^{23}[/tex] atoms of nitrogen are present.

The mass of one atom of nitrogen is 2.32×[tex]10^{-23}[/tex] grams.

Therefore, mass of 1.1×[tex]10^{-23}[/tex] atoms of nitrogen will be 1.1×[tex]10^{-23}[/tex] x 2.32×[tex]10^{-23}[/tex] grams = 2.55 x [tex]10^{-46}[/tex] grams.

Hence the correct answer is that 10.0g of [tex]N_{2} O_{5}[/tex] contains 2.55 x [tex]10^{-46}[/tex] grams of Nitrogen.

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There are 131×10²¹ carbon atoms in 132 g sample of ammonium carbonate.

Number of atoms in a compound can be calculated as first finding the number of moles of the element in the compound and then multiplying it by the Avogadro's number to get the number of atoms.

In the question given , to calculate the number of carbon atoms in 132 g of ammonium carbonate,first the number of moles of carbon in ammonium carbonate are calculated  as,

96.09 g ammonium carbonate has 12 g carbon ,therefore 132 g ammonium carbonate will have ,

132×12/96.09=16.48 g of carbon.

To find the number of moles of carbon in 132 g ammonium carbonate,mass of carbon is multiplied  by mass of ammonium carbonate to get number of moles of carbon.

16.48 g of carbon÷132 g/moles of carbon

moles of carbon=16.48×132=2175.36 moles

The number of atoms are calculated by multiplying number of moles and Avogadro's number.

=2175.36×6.022×10²³

=131×10²¹

Thus, there are 132×10²¹ atoms of carbon in 132 g of ammonium carbonate.

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The car will move with a force of 1200 N forward

The following data were obtained from the question:

We can obtain the force (i.e net force) the car will use to move as illustrated below:

Net force = forward force - force of air resistance

Net force = 2000 - 800

Net force = 1200 N forward

Thus, the car will move with a force of 1200 N forward

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Hello!

So...

The force of the car will be 12000 N forward.

Hope this helps! Also, if you need more help regarding this assignment, I made a really easy and helpful study guide for the rest of these, and even goes over a summary of the guidelines to properly answer question 11-15. So, if you need it, feel free to check it out. Thanks and good luck!

Quizlet - "Newton's Laws UT"

h t t p s : / / q u i z l e t . c o m / _ c 7 h q 1 o ? x = 1 q q t & i = 3 8 n a a s

Answer:

5.59L

Explanation:

If each mole of gas is 55 L, then this relationship can be used as a conversion factor to find the volume of gas produced

Using the dilution formula, the volume of stock required is 54 mL and is made up to 200 mL to give 0.1 g/L NaCl solution.

To prepare dilute solutions from stock solutions, the dilution formula is used to calculate the volume of stock solution required in order to prepare the dilute solution.

The dilution formula is given below:

M₁V₁ = M₂V₂

where;

From the data provided:

M₁ = 0.369 g/L

V₁ = ?

M₂ = 0.1 g/L

V₂ = 200 mL

V₁ = M₂V₂/M₁

V₁= 200 * 0.1/0.369

V₁ = 54 mL

Therefore, 54 mL f the stock solution is measured into a volumetric flask and diluted with water to  volume of 200 mL.

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Answer:

the answer is attached

Explanation:

If the mass of a crucible is 12.1 g and the mass of a crucible containing CuSO4 is 23.1 g, then the mass of the CuSO4 is 11 gram.

Given,

mass of crucible is 12g

mass of crucible with copper sulphate is 23.1g

so the mass of CuSO4 = mass of crucible with copper sulphate - mass of crucible

= 23.1 g - 12.1g = 11 g

Therefore mass of CuSO4 is 11g

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The Newman structures above which represents the conformation of 3-chloro-2-methylpentane, as viewed along the C2-C3 bond is the one where the branch substituent chloro is found at carbon 3 and the branch substituent methyl is found at carbon 2.

The correct answer choice in the picture above is option b.

In this structure, there are two different branch substituents; which are ethyl and chloro. The parent substituent is known has pentane, having 5 carbon atoms the the Newman structures above

These are compounds containing carbon and hydrogen. The study of organic compounds in chemistry is called organic chemistry.

So therefore, the Newman structures above which represents the conformation of 3-chloro-2-methylpentane, as viewed along the C2-C3 bond is the one where the branch substituent chloro is found at carbon 3 and the branch substituent methyl is found at carbon 2.

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On the periodic table, three pieces of information are given about every element are the elemental symbol, the atomic number and the atomic weight

In the periodic table the chemical elements are arranged from left to right and top to bottom in order of increasing atomic number the horizontal rows on the periodic table are called periods and vertical column are called as group and they show atomic elements that have the same number of valence electrons the three main information are given about every element are the elemental symbol, the atomic number and the atomic weight atomic number means the number of protons in an atom's nucleus is referred to as the atomic number of that element, atomic symbol means the atomic symbol (or element symbol) is an abbreviation chosen to represent an element, atomic mass or atomic weight means the standard atomic weight of an element is the average mass of the element written in atomic mass units.

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Homicide is referred to as manslaughter and involves a human killing another while burglary is referred to as the breaking into or gaining access to a building without permission.

They include the crime scene photographers and sample collector who are involved in the taking of photographs and collecting of body parts such as hair which can help reveal the identity of the suspect through the use of DNA extraction techniques.

The forensic technicians are also present at the crime scene and they help to make sketches of the crime scene and also assist in the gathering of the evidences which are left behind.

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Kc for the hypothetical reaction is 1.5×10⁻⁵

Kc is the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients.

Given reaction is

4M(g) ⇄ 2Z(g)  Kc =6.58×10⁻³

2Z(g) ⇄ 4Q(g)+8X(g) Kc =2.07×10⁻²

So for finding another Kc of that given reaction is Q(g)+2X(g) ⇄ M(g)

To find Kc the formula is [M]m/[Q]q[X]x for Q=8.66

Put the given value 6.58×10⁻³/8.66×2.07×10⁻²

= 1.5×10⁻⁵

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The name of  [tex]CoCl_{2}[/tex] is Cobaltous Chloride ,  [tex]CrBr_{3}[/tex] is  Chromic Bromide ,  PbO is Plumbous oxide , [tex]SnO_{2}[/tex] is Stannous oxide , [tex]Fe_{2} O_{3}[/tex]  is Ferric oxide and [tex]FeCl_{3}[/tex] is  Ferric Chloride.

Ionic compounds are made up of ions. The positively charged species are referred to as cations and negatively charged species are referred to as anions. Ionic compounds are named based on the nomenclature of ionic compounds.

For [tex]CoCl_{2}[/tex] , the cation is [tex]Co^{2+}[/tex] which is called cobaltous ion. The anion is [tex]Cl^{-}[/tex] which is the Chloride ion. So, the name of the compound is Cobaltous Chloride.

For [tex]CrBr_{3}[/tex] , the cation is [tex]Cr^{3+}[/tex] which is called chromic ion. The anion is [tex]Br^{-}[/tex]which is the bromide ion. So, the name of the compound is Chromic Bromide.

For PbO , the cation is [tex]Pb^{2+}[/tex] which is called Plumbous ion. The anion is [tex]O^{2-}[/tex] which is the oxide ion. So, the name of the compound is Plumbous oxide(Lead Oxide).

For [tex]SnO_{2}[/tex] , the cation is [tex]Sn^{2+}[/tex] which is called stannous. The anion is [tex]O^{2-}[/tex]which is the oxide ion. So, the name of the compound is Stannous oxide.

For [tex]Fe_{2} O_{3}[/tex] , the cation is [tex]Fe^{3+}[/tex]  which is called Ferric ion. The anion is [tex]O^{2-}[/tex] which is the oxide ion. So, the name of the compound is Ferric oxide.

For [tex]FeCl_{3}[/tex] , the cation is  [tex]Fe^{3+}[/tex]  which is called Ferric ion. The anion  is [tex]Cl^{-}[/tex] which is the Chloride ion. So, the name of the compound is Ferric Chloride.

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The chemical symbol of the halogen located in the second period that naturally occurs as a diatomic gas is F

A chemical symbol is a one or two letter designation of an element and some examples of chemical symbols of halogen are like Florine is F chlorine is Cl the first letter of a symbol is always capitalized and if the symbol contains two letters the second letter is lower case

The halogen elements are the six elements in Group 17 and second period of the periodic table group 17 occupies the second column from the right in the periodic table and contains fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and are all halogens and in that main halogen is fluorine and chemical symbol is F

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Answer:

color ,hardness,maleabillit,sulubility,electrical,

If the amount of hydrogen gas (H₂) is doubled, the number of moles of water (H₂O) that will be formed is 20.

This principle states that atoms cannot be created or destroyed.

However, atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms.

Atoms of same element can combine in more than one ratio to form two or more compounds.

The given chemical equation;

10H₂ + 7O₂ → 10H₂O + 2O₂

In the equation above, we can infer the following;

10 moles of hydrogen gas (H₂) gave 10 moles of water (H₂O).

10 H₂  ----------------------> 10 H₂O

when the hydrogen gas (H₂) is doubled,

20 H₂  ----------------------> ? H₂O

= (20 x 10)/10

= 20 moles of water (H₂O)

Thus, if the amount of hydrogen gas (H₂) is doubled, the number of moles of water (H₂O) that will be formed is 20.

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Answer:

B

Explanation:

the distance doesnt change over time

Answer:

D

Explanation:

If there are 6.10 moles of H, number moles of compounds H₂SO₄ is 3.05 moles, C₂H₄O₂ is 1.52 moles, and NaOH is 6.1 moles.

A mole is the unit to measure small entities as atoms, molecules, etc. It is equivalent to Avogadro's number which is equal to 6.022 x 10²³.

To calculate moles of each compound -

H₂SO₄ -

6.10 mol H x 1 mol H₂SO₄ = 3.05 mol

                     2 mol H

Hence, there are 3.05 moles of H₂SO₄.

C₂H₄O₂ -

6.10 mol H x 1 mol C₂H₄O₂ = 1.52 mol

                       4 mol H

Hence, there are 1.52 moles of C₂H₄O₂

NaOH-

6.10 mol H x 1 mol of NaOH = 6.1 mol

                        1 mol of H

Hence, there are 6.1 moles of NaOH.

Complete question is -

If there are 6.10 moles of H, how many moles of each of the compounds are present?

a) H₂SO₄

b) C₂H₄O₂

c) NaOH

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The total number of Significant digits are 5.

We have a measurement of distance - 10082 Kilometers.

We have to determine the total number of significant digits in this measurement.

Significant figures are the digits of a number that are meaningful in terms of accuracy or precision.

According to the question -

Distance = 10082 Km

In this measurement, the total number of significant digits are 5 since all the 5 digits are important for a accurate measurements.

Hence, the total number of Significant digits are 5.

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Since then, it has spread to other rivers, colonized them, clogged the water intake pipes, and competed with local species for food. Zebra mussels are the method for removing a lot of plankton from the water column.

The Caspian Sea in Asia is where zebra mussels, or Driessen polymorpha, are found naturally. They arrived in the Great Lakes region in the late 1980s via ballast water from a transatlantic ship. The Great Lakes, Mississippi, Tennessee, Hudson, and Ohio river basins were all overrun by these mussels within ten years. The lake's brilliant blue hue is a result of Tahoe's clean air and water. There is more to this phenomenon than just the fact that Lake Tahoe's surface reflects the sky, which contributes to its blue color.

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Clumps of gas and dust shrink to much smaller sizes, which leads to the formation of stars and planets.

This is how stars and planets formed.

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The characteristics among the choices given which best describe the properties of liquids are

The correct answer choices are options B, C and D.

Of course, liquid do not have a fixed shape but they a fixed volume. The particles of liquids are not tightly packed together as in solids but have some spaces between their particles.

Liquids are characteristized by the following properties such as:

So therefore, the characteristics among the choices given which best describe the properties of liquids are

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It would probably be around 20 because of the aluminy

There may be numerous starting points that a composer could use when writing a piece of music. A. True

The composer may additionally begin at a unique factor depending on the ideas they've at that moment in time. A music composer is someone who sings or performs a musical tool. In other phrases, it may be said that a singer or a guitarist is referred to as a musician for that count number. A composer however is a person who sets a track to a song.

Musical composition can discuss an original piece or work of the track, both vocal or instrumental, the structure of a musical piece, or the procedure of making or writing a new piece of music. people who create new compositions are referred to as composers.

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Answer:

Evaporation

Explanation:

Overtime the water is slowly changing its physical state from liquid form to gaseous form in the form of evaporation.