Fill in the blanks

Matter is made up of tiny ___
or pieces called ___.

When lots of atoms are grouped
____ together, we __________ matter.

When atoms are ____ out, we ____ always see matter, because the particles are so ____.

There are approximately 0.0105 moles or \(6.3 * 10^20\) hydrogen atoms in a 100. mg dose of acalabrutinib.

To calculate the number of hydrogen atoms in acalabrutinib (\(C_{26} H_{23} N_{7} O_{2}\)), we need to first determine the number of moles of acalabrutinib present in the 100. mg dose, and then use the molecular formula of acalabrutinib to find the number of hydrogen atoms. The molar mass of acalabrutinib can be calculated by adding the atomic masses of its constituent atoms: Molar mass of acalabrutinib = (26 *12.01) + (23 * 1.01) + (7 * 14.01) + (2*16.00) + (7 * 1.01) = 465.51 g/mol. Now we can calculate the number of moles of acalabrutinib in a 100. mg dose: Number of moles = mass ÷ molar mass

= 0.1 g ÷ 465.51 g/mol

= \(2.15 *10^-4 mol\)

Finally, we can use the molecular formula of acalabrutinib to find the number of hydrogen atoms: Number of hydrogen atoms = 23 * (1 H atom per molecule) x (\(2.15 * 10^-4 mol\))

= 0.0105 mol H atoms

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Answer:

There are more than 109 different types of atom – one for each element. Differences between the atoms give the elements their different chemical properties. In 2001, there were 115 known elements. However, those above 109 are highly unstable and have been made in only tiny quantities.

Explanation:

A particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons and neutrons.

Answer:

fire > rocks > air

Answer:

They refer to energy that moves. Kinetic energy is energy that is currently moving. Potential refers to energy that has yet to move, or simply energy in wait

Explanation:

Answer:

I'm not 100% but a possible answer could be: No energy could either be created or destroyed

LMK if not but good luck!

1. No. 108 g of Ag has a lower number of atoms than 80 g of Ca.

2. The gram of \(SO_3\) in 3 moles of the compound would be 240 g.

3. 1.20 x \(10^{24\) atoms

4. The grams of hydrogen in 3.6 x \(10^{24\) molecules of \(NH_3\) would be 18 grams.

According to Avogadro, 1 mole of a substance contains 6.022 x \(10^{23\) molecules or atoms.

Recall that: mole = mass/molar mass

1. 108 g of Ag would be equivalent to: 108/108 = 1 mol.

80 g of Ca would be equivalent to: 80/40 = 2 mol

Since 1 mol is equivalent to 6.022 x \(10^{23\) molecules or atoms, it means 80 g of Ca has twice as atoms as 108 g of Ag.

2. 3 mol sample of \(SO_3\) would be equivalent to: 3 x 80 = 240 g

3. 124 g of \(Na_2O\) would be equivalent to: 124/62 = 2 mol

Number of atoms = 2 x 6.022 x \(10^{23\)

                              = 1.20 x \(10^{24\) atoms

4. 3.6 x \(10^{24\) molecules of \(NH_3\) would be equivalent to:

  3.6 x \(10^{24\)/6.022 x \(10^{23\) = 6 mol of \(NH_3\)

\(NH_3 --- > 3H^+ + N^{3-\)

From the above equation, 1 mole of \(NH_3\) produces 3 moles of hydrogen.  Thus,  6 moles of  \(NH_3\) would be equivalent to 18 moles of hydrogen.

18 moles of hydrogen = 18 x 1

                                    = 18 g

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The learning activities titled "Hypothesis," "Variables and Hypothesis," and "Constructing a Hypothesis" all share certain similarities and differences. A question that arises in response to an observation is similar to a scientific research question in that both require some level of investigation to achieve an answer. However, scientific research questions are typically more specific and refined, with a defined methodology for obtaining data and verifying results.

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The converted value of  0.500 kg/m³ is   0.0005 µg/μL.

The above problem is dealing with unit conversion. Unit conversion may be a handle with numerous steps that includes multiplication or division by a numerical factor or, especially a conversion factor. The method may require a choice of the proper number of noteworthy digits, and adjusting. Distinctive units of transformation are utilized to degree distinctive parameters. By definition conversion of units implies the change between diverse units and estimations of the same amount done by the method of duplication or division. In maths, conversion is the method of changing the esteem of one shape to another for case inches to millimeters or liters to gallons. Units are utilized for measuring length, measuring weight, measuring capacity, measuring temperature, and measuring speed.

Since we know that 1 kg/m3 is equal to  0.001 ug/uL and the reverse of it  

which is  1 ug/uL is equal to  1000 kg/m3.

so ,  0.500  kg/m³ =0.001 x 0.500 =0.0005 µg/μL

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Answer:

1.403x10²⁴ molecules

Explanation:

In order to calculate how many molecules of CO₂ are there in 102.5 g of the compound, we first convert grams to moles using its molar mass:

Now we convert moles into molecules using Avogadro's number:

Answer:

Heat = 7375J

Final temperature of the mixture = 27.35°C

Explanation:

In the reaction:

2HCl(aq) + Ba(OH)₂(aq) → BaCl₂(aq) + 2H₂O(l) ΔH = –118 kJ

When 2 moles of HCl reacts with excess of Ba(OH)₂ there are released 118kJ.

In the reaction, moles of HCl and Ba(OH)₂ that reacts are:

Moles HCl = 0.250L ₓ (0.500 moles / L) = 0.125 moles HCl

Moles Ba(OH)₂ = 0.500L ₓ (0.500 moles / L) = 0.250 moles Ba(OH)₂

For a complete reaction of 0.125 moles of HCl you need:

0.125 mol HCl ₓ (1 mole Ba(OH)₂ / 2 moles HCl) = 0.0625 moles Ba(OH)₂

As you have 0.250 moles of Ba(OH)₂, this reactant is in excess

2 moles of HCl that react release 118kJ, 0.125 moles of HCl release:

0.125 moles HCl ₓ (118kJ / 2 moles) = 7.375kJ =

The heat released can be obtained with the formula:

Q = C×m×ΔT

Where Q is heat, C specific heat of the solution, m its mass and ΔT change in temperature.

Replacing:

Q = C×m×ΔT

7375J = 4.18J/g°C×750.0g×ΔT

2.35°C = ΔT

As ΔT = Final T - Initial T:

2.35°C = Final T - 25.0°C

Answer:

Explanation:

charge on divalent cation = 2 x 1.6 x 10⁻¹⁹ C

charge on monovalent anion = 1.6 x 10⁻¹⁹ C

distance between these charges = .065 + .126 nm

= .191 x 10⁻⁹ m

force of attraction

= k q₁q₂ / r²

= 9 x 10⁹ x 2 x 1.6 x 10⁻¹⁹  x 1.6 x 10⁻¹⁹ / ( .191 x 10⁻⁹ )²

= 1263.12 x 10⁻¹¹ N .

Answer:

See explanation

Explanation:

A redox reaction equation shows a gain/loss of electrons from left to right in a reaction. In a redox reaction, a specie looses electrons while another specie gains electrons.

Considering the equation; 2Al(s) + 3Cu(NO3)2(aq) -----> 3Cu(s) + 2Al(NO3)3(aq)

The oxidation state of Al reactant is zero since the oxidation state of all uncombined elements is zero. The oxidation state of All in the product is +3

The oxidation state of the copper in the reactant is +2. The oxidation state of copper in the product is zero.

The oxidation state of N in the reactant and product is +5.

The oxidation state of oxygen in the reactant and product is (-2).

This is a redox reaction because from left to right, Al was oxidized (oxidation number increased from zero to +3) while Cu was reduced (oxidation number decreased from +2 to zero).

(a) Therefore the limiting reagent is N2.

(b) The kilograms of excess reagent left = 0.5709 kg.

(c) % Yield = 89.475 %.

Given reaction is

N2(g) + 3H2(g) ------> 2NH3(g)

mass of N2=18.2 kg=18.2 x 103 g (Since 1 kg=1000 g)

Molar mass of N2=28.0134 g/mol

Moles of N2=mass/molar

mass = (18.2 x 103 g)/(28.0134 g/mol) = 649.689 mol.

the mass of H2 = 4.5 kg = 4.5 x 103 g = 4500 g

The molar mass of H2 = 2.01588 g/mol

Moles of H2 = (4.5 x 103 g )/(2.01588 g/mol) = 2232.276 mol.

As per the balanced equation, the mole ratio between N2:H2 = 1:3.

But here N2:H2 = 649.689: 2232.276  = 1:3.436

That means H2 is in excess.

(a) Therefore the limiting reagent is N2.

(b) The actual moles of H2 required = 3 x mol of N2 used = 3 x 649.689 mol = 1949.067 mol.

Mass of H2 required = moles x molar mass = 1949.067 mol x 2.01588 g/mol = 3929.085 g.

The excess mass of H2 present = 4500 g - 3929.085 g = 570.91 g = 0.5709 kg.

The kilograms of excess reagent left = 0.5709 kg.

(c) The theoretical yield of NH3 = 2x moles of N2 used = 2 x 649.689 mol = 1299.378 mol.

The molar mass of NH3 = 17.03052 g/mol

Therefore theoretical yield of NH3 =moles x molar mass = 1299.378 mol x 17.03052 g/mol = 22129.08 g

Theoretical yield of NH3 =22.129 kg

Given the experimental yield of NH3 = 19.8 kg.

Therefore,

% Yield = (Experimental yield)/(Theoretical yield ) x 100

% Yield=(19.8 kg/22.129 kg) x 100=89.475 %.

% Yield=89.475 %.

Reagent or analytical reagent is a substance or compound that is added to a system to produce or test a chemical reaction as it occurs. The terms reactant and reactant are not often used interchangeably, but a reactant defines a substance that is used up in  a chemical reaction.

H2 (hydrogen gas) and O2 (oxygen gas) are reactants in the reaction that forms liquid water: 2 H2(g) + O2(g) → 2 H2O(l).

Note that mass is conserved in this equation. There are four hydrogen atoms and two oxygen atoms on the original and multiplicative sides of the equation.

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The compound n - hexane as shown does not dissolve in water.

Due to a large difference in polarity between the two compounds, n-Hexane does not dissolve in water.

Water is a polar molecule, which means that one end of it (the hydrogen side) has a slight positive charge and the other end (the oxygen side) has a slight negative charge. The unequal distribution of electrons within the water molecule, which produces a dipole moment, is the cause of this polarity.

N-Hexane, on the other hand, is a nonpolar molecule. The electrons are uniformly distributed throughout the molecule, which is made up of carbon and hydrogen atoms bound together in a straight chain. N-Hexane lacks a substantial dipole moment as a result.

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The matchup are:

DOPPLER METHOD:

TRANSIT METHOD:

ASTROMETRIC METHOD

The Doppler effect is seen as a term that is called also as Doppler shift. It is said to be a word that is used to connote the fact that there are changes in frequency that is as a result of transferring sources of sound or light with view of  an observer.

One or more exoplanets in orbit around a star might be inferred indirectly using the transit method, a photometric technique.

Astrometry is a technique that uses exact measurements of a star's location in the sky to find out how fast it is moving.

Hence, the matchup above are correct.

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Answer: 1:1

Explanation:

Since Na trades place with Na it makes it 1:1

Answer:

d = 1.53 g/mL

Object will sink into water

Explanation:

Given data:

Mass of object = 14.8 g

Initial volume of water = 25.0 mL

Final volume after adding object = 34.7 mL

Density of object = ?

Density of water = 1.00 g/mL

Solution:

Volume of object = Total volume - volume of water

Volume of object = 34.7 mL - 25.0 mL

Volume of object = 9.7 mL

Density of object;

d = mass/volume

d = 14.8 g /  9.7 mL

d = 1.53 g/mL

The density of water is 1.00 g/mL which means object is heavier than water thus object will sink into the water. The object with density less than water are float in it.

The [H₃O⁺] for the solution is less than 1 x 10⁻⁷ M, the solution is considered as basic.

A basic solution is one that has a pH greater than 7. It is also sometimes referred to as an alkaline solution. Basic solutions contain a lower concentration of hydrogen ions (H⁺) than hydroxide ions (OH⁻), meaning that they have a higher concentration of OH⁻.

We know that pH + pOH = 14 at 25°C.

Therefore, pH = 14 - pOH = 14 - 2.33

= 11.67.

Since pH = -log[H₃O⁺], we can rearrange to solve for [H₃O⁺]; [H₃O⁺] = \(10^{(-pH)}\)

= \(10^{(-11.67)}\) = 1.74 x 10⁻¹²) M.

Since the [H₃O⁺] concentration is less than 1 x 10⁻⁷ M, the solution is considered basic.

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Based on law of conservation of matter, the mass of the sawdust will be the same.

According to the principle of conservation of matter, matter can neither be created nor destroyed but can converted from one form to another.

The mass of the wood before it is converted to sawdust = 2.5 kg

The of the sawdust will be the same as the mass of the wood = 2.5 kg

Thus, we can conclude that based on law of conservation of matter, the mass of the sawdust will be the same.

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Explanation:

Since 10mm is 1cm

Therefore 7.60cm is 760mm

Since 1 inch is 2.54cm

Therefore 7.60cm is 3.10 inches

Answer:

a. The resonance effect of the hydroxyl group stabilizes the anionic intermediate

Explanation:

The resonance effect stabilizes the the charge through the delocalization of the pi bonds. The resonance stabilization mainly occurs in the conjugated pi systems.

For example, phenol forms a strong hydrogen bonds than the nonaromatic alcohols as the \($O_2-H_2$\) dipole present in the hydroxyl group is being stabilized by the presence of the aromatic ring of phenol.

Thus the resonance effect of the hydroxyl group stabilizes the anionic intermediate.

The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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Answer:

7.93E24 molecules of water

Explanation:

determine no. of moles of water: 237 g/18 g/mole H2O= 13.17 moles H2O

13.17 moles H2O x 6.02E23 molecules/mole= 7.93E24 molecules of water

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 7.93×10²⁴  molecules are in 237 g (about a cup) of water. The correct option is option E.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of moles of water=237 g÷18 g/mole

number of moles of water = 13.17 moles

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

molecules of water=13.17 moles x 6.02×10²⁴

molecules of water=7.93×10²⁴  molecules of water

Therefore, 7.93×10²⁴  molecules are in 237 g (about a cup) of water. The correct option is option E.

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Answer:

Reaction rate

Explanation:

We are told that Ben observes how quickly some dry wood is burning in a campfire.

This is an example of reaction rate because it tells us the speed i.e. how fast the dry wood is reacting with the camp fire.

Answer:

1,329

Explanation:

Answer:



Explanation:

To solve this problem, we need to use the Avogadro's number to convert the given number of molecules to moles, and then use the molar mass of CCl4 to convert to grams.

1 mole of any substance contains Avogadro's number of particles, which is approximately 6.02 × 10^23 particles.

The molar mass of CCl4 is 12.01 + 4(35.45) = 153.82 g/mol.

So, we have:

4.63 × 10^23 molecules of CCl4 = (4.63 × 10^23) / (6.02 × 10^23) moles of CCl4

= 0.769 moles of CCl4

Then, we can use the molar mass of CCl4 to convert to grams:

0.769 moles of CCl4 × 153.82 g/mol = 118.3 g

Therefore, 4.63x10^23 molecules of CCl4 is equivalent to 118.3 grams of CCl4.

Answer:

C

Explanation:

sorry if im wrong!!