A metal sample weighing 34.526 g was heated to 98.0 °C then quickly transferred into a Styrofoam cup calorimeter containing 74.365 g of distilled water at a temperature of 27.0 °C. The temperature of the water in the cup increased and stabilized at 29.9 °C. Show all work What is the final temperature of both the water and the metal?​

Explanation:

What do you mean by 'how many oxygen'?

oxygen atoms? or oxygen percentage?

if oxygen atoms is 12 atoms

The measure of the length of events and the duration of intervals between events is time.

The duration of events or the gaps between them can be measured, compared, or even ordered using time. The lengthy period of time that the Earth's geologic history takes up is known as geologic time. Starting at the beginning of the Archean Eon  formal geologic time runs until the present. Geology is defined as the "Science of the Earth."

Geology is the fundamental Earth science that examines how the earth created, its structure and composition, and the various forces acting on it. It is sometimes known as geoscience or earth science.

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d. 735 g of acrylonitrile could be produced by reacting 583 g of propene, \(C_{3}H\), with excess ammonia, NH, and oxygen

To determine the grams of acrylonitrile that could be produced, we need to find the limiting reactant in the given chemical equation. The limiting reactant is the one that is completely consumed and determines the amount of product formed.

First, we need to calculate the molar masses of propene (\(C_{3}H_{6}\)) and acrylonitrile (\(C_{3}H_{2}N\)).

Molar mass of propene (\(C_{3}H_{6}\)):

3(C) + 6(H) = 3(12.01 g/mol) + 6(1.01 g/mol) = 42.09 g/mol

Molar mass of acrylonitrile (\(C_{3}H_{2}N\)):

3(C) + 2(H) + 1(N) = 3(12.01 g/mol) + 2(1.01 g/mol) + 1(14.01 g/mol) = 53.06 g/mol

Next, we calculate the number of moles of propene:

583 g / 42.09 g/mol = 13.86 mol

According to the balanced equation, the stoichiometric ratio between propene and acrylonitrile is 2:2. Therefore, for every 2 moles of propene, 2 moles of acrylonitrile are produced.

Since the stoichiometric ratio is 1:1, the number of moles of acrylonitrile produced is also 13.86 mol.

Finally, we calculate the mass of acrylonitrile:

Mass = moles × molar mass = 13.86 mol × 53.06 g/mol = 735 g

Therefore, Option D is correct.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass of pencil = 3.5 g

density = 0.875 g/mL

So we have

\(volume = \frac{3.5}{0.875} \\ \)

We have the final answer as

Hope this helps you

The most common example is the molar volume of a gas at standard temperature and pressure (STP), which is equal to 22.4 L for 1 mole of any ideal gas at 273.15 K and 1 atm of pressure.

Stoichiometry refers to the quantitative relationship between reactants and products. Calculating the quantities of reactants needed to make a given quantity of products, or the quantities of products resulting from a given quantity of reactants, is required in stoichiometric problems. Gas laws must be taken into account for the calculation if one or more reactants or products in a chemical reaction are gases. The findings of ideal gas law applications are often accurate to within 5%. We go over a few key ideas that are crucial for solving Stoichiometry Problems involving Gases in the sections below.

Stoichiometry and gas laws both rely on the mole notion as their foundation. A mole is an exact measurement of a substance. Based on the quantity of identities, a mole is a unit (i.e. atoms, molecules, ions, or particles). The number of identities in a mole of anything is equal to the number of atoms in exactly 12 grams of carbon-12, the most common isotope of carbon.

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Answer:

heat is mesured in calories and also joules

Explanation:

2, 3, 5, 4, 1 is the Correct order which is relater  to hyperglycemia and vascular injury.

What is Hyperglycemia?

The word "hyperglycemia" comes from the Greek words "hyper" (high) and "glykys" (sweet/sugar") (blood). Blood sugar levels of more than 125 mg/dL when fasting and more than 180 mg/dL two hours after eating are considered to be hyperglycemia. A patient has pre-diabetes or impaired glucose tolerance if their fasting plasma glucose is between 100 and 125 mg/dL. The pathophysiology of hyperglycemia, its presentation, and consequences are covered in detail in this exercise, which also emphasises the need of the interprofessional team in diagnosing and treating patients with this illness.

Untreated hyperglycemia can result in a variety of significant, life-threatening consequences, including harm to the kidneys, heart, eyes, nerves, and peripheral vascular system. Thus, it is essential to properly and efficiently treat hyperglycemia to minimise illness complications and enhance patient outcomes.

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Answer:

the experiment measurements might been thrown off

Explanation:

The mass and volume has direct proportional to each other.

The volume of the object is directly proportional to its mass which means that if the volume increases the mass of the object increases also increase and vice versa. Due to this direct relationship, the line of regression will go straight between X and Y axis.

So we can conclude that mass and volume has direct proportional to each other.

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Answer: yes

Explanation:

Answer:

Elevation.

Explanation:

Although latitude is a very important factor in temperature, Las Vegas and Mt. Charleston are pretty close to each other, which makes me think that elevation would be the only thing that could explain the extreme difference in temperature.

Explanation:

Add water, Na2CO3 dissolves, filter, PbCO3 stays in the paper and dissolved Na2CO3 goes through as the solution. Dry the PbCO3 and you have the dry solid.

OR

Add water to dissolve then filter to obtain PbCo3 as you're residue and Na2Co3 as the filtrate. Dry the insoluble PbCo3 between filter papers and you obtain solid PbCo3

Answer:

its DDDDDDDDDDDDDDDDDD

The structure that is least likely to exist is HS.

Sulfur is an element in group 16. Sulfur is a divalent element that has two lone pairs of electrons. This means that sulfur forms compounds in which it is bonded to two atoms or groups.

All the molecules listed can exist because they consists of structures in which sulfur is bonded to two atoms or groups. The only structure that can not exist is HS because it does not satisfy the valency of sulfur.

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The mass of the carbon dioxide is  49.72 g from the calculation done.

The phrase "mole fraction," which is often referred to as "molar fraction" or "amount fraction," is used to describe the proportions of a mixture's components. It is an intangible quantity that expresses the proportion between the moles of a given component and the total moles in the combination.

We know that;

Number of moles of ethanol = 9.2/46 g/mol

= 0.2 moles

Now;

Number of moles of water = 216.0 g/18 g/mol

= 12 moles

Mole fraction of water = Number of water/ Total number of moles

0.9 = 12/12 + 0.2 + x

0.9(12.2 + x) = 12

10.98 + 0.9x = 12

x = 1.13 moles

Now;

Moles = mass/Molar mass

1.13 = x/44

x = 49.72 g

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Yes, recrystallization from water would be a viable technique of purification if crude acetanilide contained sugar and charcoal. Due to their physical insolubility, charcoal found in crude acetanilide and water will form a heterogeneous combination. Charcoal will separate during crystallization because it is insoluble in water. Sugar and the unreconstituted crude acetanilide make up the remaining portion of the combination. Crude acetanilide will crystallize in this combination and separate from the sugar and water solution. Filtration will be used to capture the crude acetanilide that has solidified. Sugar and water make a soluble solution, thus they are kept separate. This is how the charcoal and sugar combination is purified and its constituent parts are separated from crude acetanilide using the recrystallization process from water.

Answer:

explain cash of the following terms in agricultural

Answer:

the same number of molecule 2.0 liters of o2(g) at STP

The gas sample that has the same number of molecules as 2.0 liters of CH4(g) at STP is 2.0 liters of O2(g).

The number of molecules of oxygen gas at Standard Temperature and Pressure (STP) is determined as;

1 moles = 22.4 L = 6.02 x 10²³ molecules

from the question, 1 moles of CH4 = 2 liters = 1 moles of O2 occupying 2 liters.

Thus, the gas sample that has the same number of molecules as 2.0 liters of CH4(g) at STP is 2.0 liters of O2(g).

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Answer:

10 neutrons

Explanation:

The mass of is made up of the total protons and neutrons in an atom.

Each particle has a mass of 1 amu (atomic mass unit).

All fluorine atoms have 9 protons.

If each proton is 1 amu, the protons must contribute 9 amu to the total mass of the atom (9 x 1 amu = 9 amu).

This means the neutrons must contribute a total mass of 10 amu (18.998 amu - 9 amu = ~10 amu).

If each neutron has a mass of 1 amu, there must be 10 neutrons in a fluorine atom (10 amu / 1 amu = 10 amu).

Answer:

0.0023 cm

Explanation:

The following data were obtained from the question:

Length (L) = 55 cm

Breadth (B) = 23.3 cm

Volume (V) = 2.9 cm³

Thickness (T) =?

Thus, we can obtain the thickness of the aluminum foil as illustrated below:

V = L × B × T

2.9 = 55 × 23.3 × T

2.9 = 1281.5 × T

Divide both side by 1281.5

T = 2.9/1281.5

T = 0.0023 cm

Therefore, the thickness of the aluminum foil is 0.0023 cm

Perch, frog, pigeon, and other species evolution would not have arisen prior to the derived shared trait of jaws and after the common ancestor.

The development of jaws in the bodies of our ancestors was a critical phase in the evolution of vertebrates, including humans. The earliest jawed vertebrates, called gnathostomes, descended from jawless fish and appeared in the fossil record around 420 million years ago.

Rats and people are both warm-blooded creatures that give birth to live children; both have similar organs, such as hearts and livers; both have comparable neurological systems; both employ comparable hormones to regulate body functions.

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A)Concentration of NH4+ = 0.041 * 0.0100 M = 0.00041 M

B)Concentration of molecular NH3 = 0.0100 M - 0.00041 M = 0.00959 M

C)Ka = (0.00041 M)(0.00041 M) / 0.00959 M = 1.76 x 10^-5

D)[OH-] after NH4Cl addition = 0.00041 M - 0.0090 M = -0.00859 M (negative value indicates that OH- is completely consumed)

To calculate the values requested, we can use the given information and the concept of ionization of aqueous ammonia. The ionization reaction is as follows:

NH3 + H2O ⇌ NH4+ + OH-

(a) To determine the concentration of NH4+ and OH- ions:

Given that the ammonia solution is 4.1% ionized, this means that 4.1% of the initial concentration of NH3 has ionized.

Concentration of NH4+ = 0.041 * 0.0100 M = 0.00041 M

Concentration of OH- = 0.00041 M

(b) To find the concentration of molecular ammonia:

Concentration of molecular NH3 = initial concentration - concentration of NH4+

Concentration of molecular NH3 = 0.0100 M - 0.00041 M = 0.00959 M

(c) To calculate the ionization constant (Ka) of aqueous ammonia:

Ka = [NH4+][OH-] / [NH3]

Ka = (0.00041 M)(0.00041 M) / 0.00959 M = 1.76 x 10^-5

(d) When 0.0090 mol of NH4Cl is added to 1 L of the solution, it reacts with OH- to form NH3 and H2O. The NH4Cl dissociates fully, providing 0.0090 mol of NH4+ and Cl- ions.

Since NH4+ reacts with OH-, the concentration of OH- will decrease by 0.0090 M.

[OH-] after NH4Cl addition = 0.00041 M - 0.0090 M = -0.00859 M (negative value indicates that OH- is completely consumed)

Please note that the negative value for [OH-] is not physically meaningful in this context, as the actual concentration cannot be negative. It suggests that all OH- ions have been consumed in the reaction, and the solution is now acidic.

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Answer: arterioles

Explanation:

Answer:

Explanation:

IUPAC nomenclature is based on naming a molecule's longest chain of carbons connected by single bonds, whether in a continuous chain or in a ring. All deviations, either multiple bonds or atoms other than carbon and hydrogen, are indicated by prefixes or suffixes according to a specific set of priorities

Answer: B) 0.005 55 cm

Hope you have a blessed day!

The electron geometry of carbon tetrachloride is tetrahedral, with 4 single bonds. The bonding and hybridization of the central atom is sp3, meaning that the electron orbitals used in the bonding are three hybridized orbitals composed of one s orbital and three p orbitals.

SP3 hybridization is a type of electron orbital hybridization that forms four sp3 orbitals, which are composed of one s orbital and three p orbitals. This hybridization is most commonly seen in molecules where the central atom is surrounded by four different atoms or groups of atoms. In carbon tetrachloride, the carbon atom is surrounded by four chlorine atoms, and each chlorine atom is single-bonded to the central carbon atom.

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Answer:  96 g O2

Explanation:

this is combustion

CH4 + 2 O2  --> CO2 + 2 H2O

24 g CH4  X 1 mole Ch4 / 16.043 g CH4) X ( 2 moles O2 / 1 moles CH4) X

( 31.999 G O2 / 1 mole O2 ) = 95.74 g O2 = 96 g O2 in correct sig figs

Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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The statement that is true of a Lewis base is that a Lewis base donates electron pairs (option A).

A Lewis base is any nucleophylic compound that can donate a pair of electrons and form a coordinate covalent bond.

On the other hand, a Lewis acid is any electrophylic compound that can accept a pair of electrons and form a coordinate covalent bond.

This means that a Lewis base can donate a pair of electrons to a Lewis acid to form a product containing a coordinate covalent bond. This product is also referred to as a Lewis adduct.

Therefore, option A is correct about Lewis base

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Answer:

mineral grains within the original rock can cause coalesce to form larger crystals and algin themselves into bands

Explanation:

this can give the rocks stripes appearance and a garnet in an example of a mineral produced through the metamorphism

Answer:

1.992×10–²³

Explanation:

We mainly use molar masses in calculation and this is not a mass of single but it is mass of one mole of atoms, molecules or ions. We know that in ions and atoms there are only differences in the number of electrons and mass of electrons is negligible. Then the mass of the ion and atom of the same element is the same.