A chemist adds of a M calcium sulfate solution to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask

Answer:polar covalent bond

Explanation:

Compounds are formed ether by donating, receiving or sharing of electrons making the bonds between them to  be ionic, or covalent .

Now  according to the rule  of type of bond assignment due to electronegativity difference of atoms

---When the  electronegativity difference is less than 0.5,  the bond formed is nonpolar covalent.

---When   the  electronegativity difference is between 0.5 and 1.6, the bond is considered polar covalent

---When  the  electronegativity difference greater than 2.0, then the bond is ionic.

Therefore, When the absolute value of the difference in electronegativity of two adjacent atom in a compound is 1, they are most likely bonded by  polar covalent bond eg HCl bond , CCL4 bond

Answer:

Cell cycle.

Explanation:

A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.

A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.

Generally, cells have the ability to independently replicate themselves. These cells can be compared to the kind of structures found in a business or factory, where you have different workers performing different functions.

In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles and they include nucleus, cytoplasm, cell membrane, golgi apparatus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, vesicles, etc.

The regular sequence of growth and division that cells undergo is called the cell cycle. This cycle makes it possible for the cells found in living organisms to divide and produce new cells.

Basically, there are four (4) phases of the cell cycle and these are;

I. Prophase.

II. Metaphase.

III. Anaphase.

IV. Telophase.

The reference point in this scenario is the starting position of the toy car​.

A reference point is can be defined as the frame of reference or point mark from the various of measurement of the car's motion is determined.

When an object starts its motion from zero origin, its reference is point will be the zero origin.

Generally, the reference point of an object in motion is usually the starting position of the object.

Thus, the reference point in this scenario is the starting position of the toy car​.

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Answer:

force

Explanation:

Flask 1, 2, and 3 will basically perform cellular respiration. The correct option is A.

A sequence of chemical processes known as cellular respiration convert glucose into ATP, which can then be used as energy for a variety of bodily functions.

Glycolysis, the citric acid cycle, and oxidative phosphorylation are the three basic processes that take place during cellular respiration.

During photosynthesis, it is the conversion of ADP to ATP utilizing solar energy. In the mitochondria of a cell, the process of cellular respiration also results in the formation of ATP.

This can be done through either anaerobic or aerobic respiration, depending on whether oxygen is present.

Cellular respiration can be done in plant as well as animal cells. So, in flask 1, 2, and 3, it will take place.

Thus, the correct option is A.

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Your question seems incomplete, the missing image is:

Answer:

cover the taste with sugar add two times the amount your supposed to put in

Explanation:

Answer:

Answer is explained in the explanation section below.

Explanation:

Note: This question is not complete and lacks necessary data to solve. However, I have found a similar question and I will be using its data to solve this question for the sake of understanding and concept.

Solution:

Equilibrium Reaction:

CaO(s) + H2O(g) -->Ca(OH)2(s)    

We need to find the reaction quotient for this question:

Q = [tex]\frac{1}{P_{H20} }[/tex]

Here, only the pressure of the gaseous reactant will be used and here H20 is the only reactant which is gaseous.

And we are given that, vapor pressure of water is = 0.106 mmHg

So,

Now, we need to convert it into atm

so, 1atm = 760 mmHg

0.106 mmHg = 0.106/760 atm

0.106 mmHg = 1.394 x [tex]10^{-4}[/tex] atm

Plugging in the values in the equation, we get:

Q = [tex]\frac{1}{P_{H20} }[/tex]

Q = [tex]\frac{1}{1.394 . 10^{-4} }[/tex]

Q = 7173.60 [tex]atm^{-1}[/tex]

Answer:

[tex]= \mathbf{C_3H_6O}[/tex]

Explanation:

From the given information, since the molecular mass of the ion M+ is not given;

Let's assume M+ = 58.0423

So, by applying the 13th rule;

we will need to divide the mass by 13, after dividing it;

The quotient n = no. of carbon; &

The addition of the quotient (n) with the remainder r =  no. of hydrogen.

So;

[tex]\dfrac{58}{13}= 4 \ remainder \ 6[/tex]

So;

[tex]C_nH_{n+r} = C_4H_{4+6}[/tex]

[tex]= C_4H_{10}[/tex]

From the given information; we have oxygen present, so since the mass of oxygen = 16, we put oxygen in the molecular formula by removing [tex]CH_4[/tex]. Also, since the mass is an even number then Nitrogen is 0.

So, we have:

[tex]= \mathbf{C_3H_6O}[/tex]

Explanation:

Examples of an application include a word processor, a spreadsheet, an accounting application, a web browser, an email client, a media player, a file viewer, simulators, a console game, or a photo editor.

Answer:

Its because once you go black, there's no going back

Explanation:

Answer:

Explanation:

the last one I read it

Answer:

d

Explanation:

Answer:

B. first level consumers.

Explanation:

The first level consumers are also the primary consumers. They are the animals that depends or rely on plants to transform chemical energy into carbohydrates and sugar.

Primary consumers are mostly herbivores. They feed on plant matter by which they derive their nutrition. They have special enzymes that helps to convert plant materials into substances needed for their body.

So, the first level consumer takes plant matter and convert them into useful food materials for their own nutrition.

The second level consumers depend on the first level consumers for nutrition.

Answer:

3.01 × 10^24 particles

Explanation:

According to Avagadro, in one mole of a substance, there are 6.02 × 10^23 atoms or particles.

Using the formula: N = n × NA

Where;

N= number of particles or atoms

n = number of moles

NA = Avagadro's constant or number

This means that for 5 moles of a substance, there will be:

5 × 6.02 × 10^23

= 30.1 × 10^23

= 3.01 × 10^24 particles

Answer:

V2 = 12 L

Explanation:

Given the following data;

Initial volume = 2L

Initial pressure = 3 atm

Final pressure = 0.5 atm

To find the new volume V2, we would use Boyles' law.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

[tex] PV = K[/tex]

[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]

Substituting into the equation, we have;

[tex] 3 * 2 = 0.5V_{2} [/tex]

[tex] 6 = 0.5V_{2} [/tex]

[tex] V_{2} = \frac {6}{0.5}[/tex]

[tex] V_{2} = 12 [/tex]

V2 = 12L

Therefore, the new volume is 12 Liters.

Answer:

221g is the mass of the bar of aluminum

Explanation:

The volume of a bar of aluminum is obtained as:

Length*Width*height = Volume

That means the volume of the bar is:

2.03cm * 3.0056cm * 13.4cm = 81.8cm³

Now, the density of 2.70g/cm³ means the aluminum weighs 2.70g per cm³. The mass of 81.8cm³ is:

81.8cm³ * (2.70g / 1cm³) =

Answer:

CH₄ + 2O₂ —> CO₂ + 2H₂O

Explanation:

The thermochemical equation for the combustion of methane can be obtained as follow:

Methane (CH₄) under goes combustion in the presence of air (O₂) to produce carbon dioxide (CO₂) and water (H₂O). This can be represented in the equation below:

CH₄ + O₂ —> CO₂ + H₂O

Thus, we can balance the equation as follow:

CH₄ + O₂ —> CO₂ + H₂O

There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 2 in front of H₂O as shown below:

CH₄ + O₂ —> CO₂ + 2H₂O

There are a total of 4 atoms of O on the right side and 1 atom on the left side. It can be balance by putting 2 in front of O₂ as shown below:

CH₄ + 2O₂ —> CO₂ + 2H₂O

Now the equation is balanced.

Answer:

140 K

Explanation:

Step 1: Given data

Step 2: Calculate the final temperature of the gas

We have a gas whose pressure is reduced. If we assume an ideal behavior, we can calculate the final temperature of the gas using Gay-Lussac's law.

T₁/P₁ = T₂/P₂

T₂ = T₁ × P₂/P₁

T₂ = 280 K × 1.5 atm/3 atm = 140 K

Answer:

Explanation:

All three of these elements fall in group 7 of the periodic table and are called Halogens. Chlorine is the most reactive of these elements because it comes before the other two in the table then followed by Bromine and then Iodine.

Reactivity decreases in the group 7 elements as one moves to the latter elements due to the increase in shells surrounding the nucleus.

This is because reactivity happens as the protons in the nucleus attract electrons but when more shells are piled on, the strength of this attraction decreases as the distance increases such that they will not be as reactive anymore.

Isotonic solutions restore fluid volume because they fill the tissues and maintain fluid volume more effectively than hypertonic or hypotonic solutions.

Cells are the basic unit of life.

If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell's volume will remain stable.

If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.

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Answer:

Random particle motion in liquids and gases is a difficult concept for in temperature, the particles move faster as they gain kinetic energy.

Explanation:

Answer:

Increases

Explanation:

When a catalyst is added to hydrogen peroxide,the rate of decomposition Increases.

In living organisms, hydrogen peroxide is gotten through metabolism and it has to be broken down. This is because it could become toxic if it gets to be concentrated.

We can increase the rate of decomposition reaction through the addition of a catalyst. This breaks it down into hydrogen and water

Answer:

[tex]28.75\ \text{mL}[/tex]

Explanation:

[tex]C_1[/tex] = Initial concentration = 2 M

[tex]C_2[/tex] = Final concentration = 0.23 M

[tex]V_1[/tex] = Initial volume

[tex]V_2[/tex] = Final volume = 250 mL

We have the relation

[tex]C_1V_1=C_2V_2\\\Rightarrow V_1=\dfrac{C_2V_2}{C_1}\\\Rightarrow V_1=\dfrac{0.23\times 250}{2}\\\Rightarrow V_1=28.75\ \text{mL}[/tex]

So, the required volume is [tex]28.75\ \text{mL}[/tex].

Answer: D

Explanation:

A  wavelength is the distance from one compression to the next compression in a longitudinal wave. so, option D is correct.

A spectrum is the term used to describe the range of wavelengths or frequencies for wave phenomena. The term was originally used to describe the electromagnetic spectrum, but it is now used to describe the sound spectrum and vibration spectrum.

When electromagnetic radiation such as radio waves, light waves, or infrared waves travel across space, they leave behind distinctive patterns. Each wave has a distinct size and form. Wavelength is the separation between peaks.

In general, the electromagnetic spectrum is split into seven sections, rising in energy and frequency and decreasing in wavelength. Common names for these types of radiation include radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays.

Thus, option D is correct.

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Answer:

28.75211 kj

Explanation:

Given data:

Mass of iron bar = 841 g

Initial temperature = 84°C

Final temperature = 7°C

Heat released = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

specific heat capacity of iron is 0.444 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 7°C - 84°C

ΔT = -77°C

By putting values,

Q = 841 g × 0.444 j/g.°C × -77°C

Q = 28752.11 j

In Kj:

28752.11 j × 1 kJ / 1000 J

28.75211 kj

Answer:

12 hydrogen atoms

Explanation:

Let's consider the chemical formula of the compound (NH₄)₂C₈H₄O₂.

We can see the ammonium ion, NH₄⁺, which contains 4 hydrogen atoms. However, this ion is enclosed in parenthesis with a subindex 2. That means that we have to multiply the whole ion by 2, therefore resulting in 8 atoms of hydrogen. Then, in C₈H₄O₂, we can see another 4 hydrogen atoms. The total number of hydrogen atoms in 1 molecule of (NH₄)₂C₈H₄O₂ is 8 + 4 = 12 hydrogen atoms.

Answer:

A, Hail is large spheres of ice and snow is small flakes of ice.