"Crystal of atom" is
a)cubical
b)rhombus
c)octahedral
d) combination of all​

when sodium carbonate reacts with a dilute acid carbondioxide is produces

Answer:  carbon dioxide

Explanation:  a salt, carbon dioxide, and water are formed in this reaction

To find the molarity of a solution, you need to know the number of moles of solute (NaOH) and the volume of the solution.

First, you need to calculate the number of moles of NaOH:

Molar mass of NaOH = 22.99 g/mol (Na) + 16.00 g/mol (O) + 1.01 g/mol (H) = 39.99 g/mol

Number of moles of NaOH = mass of NaOH / molar mass of NaOH

= 80 g / 39.99 g/mol

= 2.001 mol (rounded to three decimal places)

Next, calculate the molarity of the solution:

Molarity (M) = moles of solute / volume of solution (in liters)

= 2.001 mol / 4.0 L

= 0.50025 M (rounded to five decimal places)

Therefore, the molarity of the solution is approximately 0.50025 M.

Answer:

0.50 M

Explanation:

The first step is to calculate the number of moles of NaOH in the solution using the formula:

\(\boxed{\bold{moles = \frac{mass}{molar \:mass}}}\)

The molar mass of NaOH is 40.00 g/mol (sodium: 22.99 g/mol, oxygen: 15.99 g/mol, hydrogen: 1.01 g/mol). So, the number of moles of NaOH in the solution is:

moles =\(\bold{ \frac{80 g}{40.00 g/mol }}\)= 2.00 mol

The next step is to calculate the molarity of the solution using the formula:

\(\boxed{\bold{molarity = \frac{moles\: of \:solute}{volume \:of\: solution \:in\: liters}}}\)

In this case, the moles of solute (NaOH) is 2.00 mol and the volume of solution is 4.0 liters. So, the molarity of the solution is:

molarity = \(\frac{2.00 mol}{4.0 L }\)= 0.50 M

Therefore, the molarity of the solution that contains 80 g of NaOH in 4.0 liters of solution is 0.50 M.

Answer: °32= 0 °C.

Explanation:

Answer:

Explanation:

Please add the temperature readings from all three trials for both thermometers. Will do the calculation with readings.

Following the cation (potassium), the anion is provided (bromide). how the ions linked with a potassium and bromine combination's chemical formula and compound name would be written

The main cation (positive ion) inside animal cells is potassium, whereas the main cation outside animal cells is sodium. The balance between potassium and sodium is maintained by ion pumps in the cell membrane. The concentration variations of these charged particles generate a difference in electric potential between the inside and outside of cells, known as the membrane potential. The potassium and sodium ions' creation of the cell membrane potential enables the cell to produce an action potential, or "spike," of electrical discharge. For bodily processes including neurotransmission, muscular contraction, and heartbeat, cells must be able to create electrical discharge.

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Answer: A

Explanation:

5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.

HOW TO FIND NUMBER OF MOLES:

CaO = 40g/mol + 16g/mol = 56g/mol

Number of moles = 5.0g ÷ 56g/mol

Therefore, 5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.

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Answer:

When light is shone on to the surface of a metal, its electrons absorb small amounts of energy and become excited into one of its many empty orbitals. The electrons immediately fall back down to lower energy levels and emit light. This process is responsible for the high luster of metals.

Explanation:

Your well-wisher :-)

The quantity of heat that must be added to 1755 grams of liquid water at 100°C to completely vaporize is 3.976 * 10³ kJ of heat.

The amount of heat required to completely vaporize 1775 grams of liquid water at 100°C is calculated below as follows:

Heat required = mass * latent heat of vap[orization of water

The latent heat of vaporization of water is the amount required to vaporize a unit mass of water at its boiling point.

The latent heat of vaporization of water is 2240 J/g.

Heat required = 1775 g * 2240 J/g

Heat required = 3.976 * 10³ kJ

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Answer:

protease is an enzyme

Explanation:

It hydrolyse peptide bonds of proteins and also called proteolytic enzymes.

The correct answer is 107.9 g of Ag is produced from a reaction of 31. 75 gram of Copper.

Molar mass of a substance is the mass in grams of one mole of the compound. A mole is the measurement of the number of things, such as atoms, molecules, and ions, that are present in a substance. Any material has 6.022 x 1023 molecules in a mole, it is known as Avogadro's number . The mole is used to determine the size of the tiniest entities quantitatively, just as we use a standard value to quantify many things, such as 1 dozen = 12 items.

Formula - Molar mass = mass in grams/mole = g/mol

Molar mass of a substance can be calculated as:

Given,

n = W/M, where

W = required mass

M= molar mas

Given chemical reaction is:

Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag

From the stoichiometry of the reaction,

1 mole of Cu = produce 2 moles of Ag

Given mass of Cu = 31.75g

Molar mass of Cu = 63.5g/mol

Moles of Cu = 31.75g / 63.5g/mol = 0.5 moles

0.5 moles of Cu = produce 2×0.5 = 1 mole of Ag

Molar mass of Ag = 107.9g/mol

Required mass of Ag = 1mol × 107.9g/mol = 107.9 g

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Answer: A12????

Explanation:

Answer:

C. Between 0 and 1 seconds

Explanation:

Since 0 - 1 seconds the car accelerates to 20mph. The rest each second the car accelerates 5mph.

Answer:

c

Explanation:

a p e x!

Answer:

Borax bead test

Explanation:

Another test that can be used to identify colored ions in a specific compound such as salt is called "Borax bead test".

This test involves use of a clear glassy bead of borax that is joined together in a wire loop which is going to be involved in chemical reaction with the salts of certain metals.

This reaction will produce colors that we can use to identify the exact metal ions that are present.

The weather in an area is affected mostly by interactions between solar radiation, Earth's large ocean, diverse landscapes and motion in space.

Temperature, pressure, wind, humidity, and precipitation are known as the elements of weather and these factors are fundamental to describe the weather and climate of a particular region.

Weather and climate are influenced by interactions involving sunlight,  ocean, atmosphere, ice, landforms and living things. These interactions change with latitude, altitude, and local and regional geography, and all of which can affect oceanic and atmospheric flow patterns.

Factors that combine to influence the weather are solar radiation, amount of which changes with Earth's tilt, orbital distance from sun and latitude, temperature, air pressure and abundance of water.

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Explanation

To find the molar mass of K2Cr2O7 are needed the atomic masses of each element that the molecule contains.

(Please, the periodic table is useful)

The atomic masses:

K) 39.0

Cr) 52.0

O) 16.0

-------

The molar mass = 2 x 39.0 (K) + 2 x 52.0 (Cr) + 7 x 16.0 (O) = 294 g/mol

Answer: A. 294 g/mol

Yes, the density of an object change if only the volume changes because density is an intensive property.

Density is the measure of the mass of matter contained by a unit volume.

This suggests that the density of a substance is a function of the mass and volume of the substance.

However, an increase in volume decreases the overall density of an object, making it float.

Therefore, yes, the density of an object change if only the volume changes because density is an intensive property.

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The formal charge on the C in  is 0.

In order to determine the formal charge on the carbon atom in , we need to consider the arrangement of electrons and bonds in the molecule. The Lewis structure for  is one carbon atom (C) bonded to two oxygen atoms (O). In the structure, there is a double bond between the carbon atom and one oxygen atom, while the other oxygen atom is bonded to the carbon atom by a single bond.

To calculate the formal charge on an atom, we use the formula: Formal Charge = Valence Electrons - Lone Pair Electrons - 0.5 * Bonding Electrons.

The carbon atom in  has four valence electrons. In the Lewis structure, the carbon atom is involved in two bonds and has no lone pair electrons. The carbon-oxygen double bond consists of four electrons (two bonding electrons and two lone pair electrons on the oxygen atom). The carbon-oxygen single bond consists of two electrons.

Plugging these values into the formula, we get: Formal Charge = 4 - 0 - 0.5 * (4 + 2) = 4 - 0 - 3 = 1.

Therefore, the formal charge on the carbon atom (C) in  is +1.

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Answer: They Have Waxy Leaves And Stems

Explanation:

:)

Answer:

have waxy leaves and stems

&

produce seeds quickly

Hope this helps good luck :)

Answer:

1 year- 1 mole

time in general- amount of matter

1 second- 1 atom/ particle

Answer:

See answer below

Explanation:

To do this, you need to write down the chemical reaction giving place here.

As this is to explain the thermodynamics of the borax-borate reaction, the general reaction is as follow:

Na₂B₄O₅(OH)₄.8H₂O(s) <---------> 2Na⁺(aq) + B₄O₅(OH)₄²⁻(aq) + 8H₂O(l)

Where:

Na₂B₄O₅(OH)₄.8H₂O(s) = Borax

B₄O₅(OH)₄²⁻(aq) = Borate ion

Now, in order to calculate the concentration of borate, this compound undergoes a titration with HCl. The reaction that takes place here is:

B₄O₅(OH)₄²⁻(aq) + 2HCl + 3H₂O <---------> 4H₃BO₃(aq) + 2Cl⁻(aq)

According to this reaction, it takes 2 moles of HCl to completely react with the borate ion, therefore, the expression to calculate the concentration will be:

2 nHCl = nB₄O₅(OH)₄²⁻

2M₁V₁ = M₂V₂

Replacing the data of concentration and volume of both compounds we have:

2 * 0.1006 * 23.33 = 10M₂

M₂ = 2 * 0.1006 * 23.33 / 10

M₂ = 0.4693 M

This is the concentration of the borate. Now, to calculate the Ksp we need to write the equilibrium reaction taking place with the borax:

Na₂B₄O₅(OH)₄.8H₂O(s) <---------> 2Na⁺(aq) + B₄O₅(OH)₄²⁻(aq) + 8H₂O(l)

Ksp = [B₄O₅(OH)₄²⁻] [Na⁺]²

As we already have the concentration of borax, we can also know the concentration of sodium. If we call concentration as "s" (Stands for solubility), and rewrite the expression of Ksp:

Ksp = s * (2s)²

Finally, replacing the value of the concentration we have:

Ksp = (0.4693) (2*0.4693)²

Ksp = 0.4693 * 0.881

Ksp = 0.4134

Hope this helps

Answer:

The answer is "2.5 mole"

Explanation:

The reaction for producing \(NH_3\) can be defined as follows:

Reaction:

\(N_2+ 3H_2 \rightarrow 2NH_3\)

According to the above reaction, to produce 2 moles of \(NH_3\)  we need 1 mole of nitrogen:

So, according to the question to produce 5.0 mole \(NH_3\) the required \(N_2\):

\(\Rightarrow \ 5.0 \ mole \ of \ NH_3 \times \frac{1 \ mole\ of \ N_2}{2 \ mole \ of NH_3}\\\\\Rightarrow 5.0 \times \frac{1}{2}\\\\\Rightarrow 2.5\ mole\\\)

To produce 5.0 mole \(NH_3\)  we need 2.5 mole \(N_2\)

Total volume of the solution formed will be 32.5 liters

Given:

Molarity of solution = 0.0200 m

mass of nacl = 38.0 grams

To Find:

total volume of the solution

Solution: Molarity is defined as the amount of solute present in 1 L of solution. The equation used to determine molarity of the solution follows:

M = given mass of nacl/molar mass of nacl*1/volume of solution

volume of solution = given mass/molar mass*1/molarity

volume = 38/58.5*1/0.02 = 32.5

Hence, volume of solution = 32.5 litres

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Answer:

NiSO4

Explanation:

Sulphur has got 2 valence electrons that it gains and on the exchange of the valence electrons with Nickel, which provides a number of valence electrons that cancels easily with those of sulphur, the we shall have the remainder of four electrons at the the bass of the formula

The 3 examples of metaphors: 1. life is a dual carriageway. 2. Her eyes were diamonds.3. he is a shining big name.

A metaphor is discernment of speech that, for rhetorical effect, directly refers to 1 thing by bringing up another. it may provide clarity or become aware of hidden similarities between two one-of-a-kind thoughts. A metaphor is a discernment of speech that describes an item or movement in a manner that isn't always actually genuine but helps explain a concept or make an assessment.

See if the sentence makes use of a word inclusive of “as” or “like” as a preposition. that is, it's far from evaluating things explicitly. If it compares matters without the usage of prepositions consisting of “like” or “as” it is a metaphor.

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Answer:

1.79°C

Explanation:

Applying,

PV/T = P'V'/T'................. Equation 1

Where P = Initial presssure, V = Initial volume, T = Initial temperature, P' = Final pressure, V' = Final volume, T' = Final Temperature.

make T' the subject of the equation

T' = P'V'T/PV................ Equation 2

From the question,

Given: P = 760 mmHg (Standard pressure), T = 273 K (Standard temperature), V = 62.65 L, P' = 612 mmHg, V' = 78.31

Substitute these values into equation 2

T' = (612×78.31×273)/(760×62.65)

T' = 274.79 K

T' = (274.79-273) °C

T' = 1.79°C