Pls helpi dont understand how did she get all of this number whoever explains to me good i will mark the brainlist

Taking into account the reaction stoichiometry, 120.615 kg of HNO₃ are consumed to produce 112 kg Ca(H₂PO₄)₂.

In first place, the balanced reaction is:

Ca₃(H₂PO₄)₂ + 4 HNO₃  → Ca(H₂PO₄)₂ + 2 Ca(NO₃)₂

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:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction (being 1000 g= 1 kg):

The following rule of three can be applied: If by reaction stoichiometry 0.234 kg of Ca(H₂PO₄)₂ is produced from 0.252 kg of HNO₃, 112 kg of Ca(H₂PO₄)₂ is produced from how much mass of HNO₃?

mass of HNO₃= (112 kg of Ca(H₂PO₄)₂× 0.252 kg of HNO₃)÷ 0.234 kg of Ca(H₂PO₄)₂

mass of HNO₃= 120.615 kg

Finally, 120.615 kg of HNO₃ are consumed to produce 112 kg Ca(H₂PO₄)₂.

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Explanation:

NH₃+NO=N₂+H₂O;

NH₃+NO=N₂+6H₂O;

NH₃+6NO=N₂+6H₂O;

4NH₃+6NO=N₂+6H₂O;

4NH₃+6NO=5N₂+6H₂O.

Since it contains a phenol group, acetaminophen will give a positive phenol test when ferric chloride is added. Salicylic acid remains unreacted and causes a color change when it reacts with ferric chloride.

Phenol is primarily used in the manufacture of phenolic resins as well as nylon and other synthetic fibers.

It is also used as a disinfectant and antiseptic, as well as in medicinal preparations such as mouthwash and sore throat lozenges.

Acetaminophen will give a positive phenol test when ferric chloride is added because it contains a phenol group. When salicylic acid reacts with ferric chloride, it remains unreacted and causes a color change.

Thus, it can be concluded that yes, positive phenol test can be taken in case of acetaminophen.

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Answer:

Which statement describes a step in the formation of an ionic bond? An attraction occurs between two ions that have the same charge.

Explanation:

Answer: 4

Explanation: There are 4 sig figs because 6 and 4 are always considered significant. And a 0 is considered a sig fig if it's between two numbers besides 0 or if it's after a decimal point.

Answer:

It's about 13 mL, read it where the lowest point is,

Explanation:

Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day :)

Answer:

About 12.7mL

Explanation:

You always have to count the dip portion of the liquid. It's okay if the number is an estimate. There won't be an exact answer. My chemistry teacher says to not round the answer. Hope this helps!

If the concentration inside the cell is 5% and the concentration outside the cell is 6%, this solution will be hypertonic.

If the concentration inside the cell is 3% and the concentration outside the cell is 1%, this solution will be hypotonic.

Hypertonic solution is a solution that contains more dissolved particles (such as salt and other electrolytes) than is found in normal cells and blood.

A solution will be hypertonic to a cell if the outside concentration is higher than that inside the cell, and the solutes cannot cross the membrane.

Hypotonic solution is a solution that contains fewer dissolved particles (such as salt and other electrolytes) than is found in normal cells and blood.

A solution will be hypotonic to a cell if the outside concentration is lower than that inside the cell, and the solutes can cross the membrane.

Thus, if the concentration inside the cell is 5% and the concentration outside the cell is 6%, this solution will be hypertonic.

if the concentration inside the cell is 3% and the concentration outside the cell is 1%, this solution will be hypotonic.

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Answer:

Explanation:

11- d

12- dont know

13- c

14- d = 30

15-  b =64

16- c = 34

17-  positive= 19 protons , negative= 19electrons , neutral = 39 - 19 = 20 notrons

18- chlorine-35

because atomic mass (35.453) is close to (35)

Answer: I believe its ice melting

Explanation: it would be ice melting because it can turn back into ice by itself with out any human doing anything to it.

Answer:

3.01 x 10²⁴ atoms Mn

Explanation:

To find the number of manganese (Mn) atoms, you need multiply the given mole value by Avogadro's Number. Avogadro's number is a ratio which represents the number of atoms per every 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (moles should be in the denominator to cancel the units of the given value). The final answer should have 3 sig figs like the given value (5.00 = 3 sig figs).

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

5.00 moles Mn           6.022 x 10²³ atoms
-------------------------  x  --------------------------------  = 3.01 x 10²⁴ atoms Mn
                                              1 mole

The option that best describes the outer shell of the atoms in Group 17 is they have 7 electrons.

Group 17 elements such as chlorine, fluorine, etc have low bond dissociation energy due to their small atomic radius.

Basic characteristics include:

Thus, the option that best describes the outer shell of the atoms in Group 17 is they have 7 electrons.

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The gold will fill up 5.00 cm³of space if the density of gold is 19.3 g/cm³. Then the amount of gold filled in 5.00 cm³ of space is 96.5g.

Density is defined as the measurement of how tightly the material is packed together.

Density is defined as mass/volume.

The SI unit of density is gram/cubic centimeter.

Density can be expressed as

Density = mass/volume

As density is given as 19.3 gm/cm³ and volume is 5.00 cm³, then the mass can be calculated as

Mass = density x volume

         = 19.3 x 5.00 = 96.5g

Thus, the amount of gold filled in 5.00 cm³ of space is 96.5g.

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Answer:

0.0996 M (3 s.f.)

Explanation:

Molarity is the number of moles per litre.

Let's find the number of moles of sucrose.

[tex]\boxed{\text{Moles= Mass}\div\text{Mr}}[/tex] , where Mr is the molecular weight of the compound.

[tex]\text{Mr of C}_{12}\text{H}_{22}\text{O}_{11}[/tex]

= 12(12)+22(1)+11(16)

= 342

Moles of sucrose

= 143 ÷342

= 0.41813 mol (3 s.f.)

This means that in 4.20L of solution, we have approximately 0.41813 moles of sucrose. We can now calculate the amount of sucrose in 1L of solution.

Molarity

= 0.41813 ÷4.2

= 0.099555 mol/L (5 s.f.)

= 0.0996 M (3 s.f.)

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Answer:

Neutralization refers to aa chemical reaction where an acid and a base react with each other quantitatively.

Example:

Hydrochloric acid + Sodium hydroxide → Sodium chloride + Water ( word equation)

Explanation:

Though we haven't been asked to write down chemical equation, it is good to know.

Here is the equation:

HCl(aq) + NaOH(aq) → NaCl (aq)+ H2O (l)

Answer:

866.142 inches

Explanation:

By formula

Answer:

2-1

Explanation:

=1

The  temperature in the flask in kelvin is 577.3 K.

The relationship between volume, temperature, moles and pressure of a gas is given by the ideal gas equation written below:

where;

For the gas:

P = 120 kPa

n = 0.25 moles

V = 10 dm³

R = R = 8.314 dm³.kPa/mol.K

T = ?

T = PV/nR

T = 120 * 10/8.314 * 0.25

T = 577.3 K

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Answer:

A. Add 40 and 44

Explanation:

mass number = protons + neutrons

protons = electrons

so mass number = 40 + 44

If 0.459 g of an unknown sugar is dissolved in 100.0 mL of water its osmotic pressure is found to be 0.0824 atm. The molar mass of the sugar (in g/mol) is  \M = 3.0067.

"Molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound."

Given, that the mass of unknown sugar= 0.459 g

Volume of water =  100.0 mL

Osmotic pressure to be 0.0824 atm

The temperature of the solution = 298 K

Calculating the moles

PV = nRt

R =  8.314, constant

0.0824 X 100.0 = n x 8.314 x  298

8.24 = n x 2477.57

n = 300.67

Now, calculating the molar mass

Molar mass = n  / V

300.67 /  100.0

M = 3.0067

Thus, the molar mass of the sugar is 3.0067

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The amount of heat (in J) required for the temperature change is 26752 J.

The amount of heat required to raise the temperature of water from 25°C to 89°C is calculated as follows:

Mass of water = volume * density

density of water = 1 g/mL

volume of water = 100 mL

mass of water = 100 mL * 1 g/mL

mass of water = 100 g

heat capacity of water = 4.18 J/g°C

Temperature change = 89 - 25 = 64 °C

Heat required = 100 * 4.18 * 64

Heat required = 26752 J

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Answer:

2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq)

Explanation:

First, you have to write down a complete equation as shown below:

AlCl3 + Na2S → Al2S3 + NaCl.

When you at the above equation is not balanced.

To balance the equation, we have to identify the number of products and reactants.

Al: 1a + 0b = 2c + 0d, we have 2 Al

Cl: 3a + 0b = 0c + 1d, we have 3Cl

Na: 0a + 2b = 0c + 1d, we have 2Na

S: 0a + 1b = 3c + 0d, we have 3S

Then we simplify to obtain the lowest whole integer value:

a = 2 (AlCl3)

b = 3 (Na2S)

c = 1 (Al2S3)

d = 6 (NaCl)

Substitute the values to our first equation giving us,

2AlCl3 + 3Na2S = Al2S3 + 6NaCl,

We then include the states. Since the reaction is in aqueous solution, we insert (aq)

2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq)

Since there is an equal number of each element in the reactants and products of 2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq), the equation is balanced.

Thus our required equation is

2AlCl3(aq) + 3Na2S(aq) = Al2S3(aq) + 6NaCl(aq)

The final temperature of an 18.0 g aluminum sample if it is initially at 22.0 C and it absorbs 48.0 calories of heat energy is 34.7°C.

The temperature of a substance can be calculated using the following formula:

Q = mc∆T

Where;

According to this question, an 18.0 g aluminum sample is initially at 22.0 C and it absorbs 48.0 calories of heat energy. The final temperature can be calculated as follows:

48 = 18 × 0.210 × {X - 22}

48 = 3.78x - 83.16

3.78x = 131.16

X = 34.7°C

Therefore, the final temperature of an 18.0 g aluminum sample if it is initially at 22.0 C and it absorbs 48.0 calories of heat energy is 34.7°C.

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Answer:

k=0.0224 M/s

Explanation:

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The rate constant of the reaction is 0.0224 m/s. the rate constant is denoted by symbol k. The velocity and direction of a chemical reaction are quantified in chemical kinetics by the reaction rate constant, or reaction rate coefficient, k.

The proportionality constant in the equation that defines the link between the rate of a chemical reaction and the concentrations of the reacting chemicals is known as the rate constant, also known as the specific rate constant.

The rate constant provides insight into the variables that affect a reaction's rate. The dependence of the molar concentration of the reactants on the rate of reaction may be determined by knowing the rate constant.

The rate constant provides insight into the variables that affect a reaction's rate. The dependence of the molar concentration of the reactants on the rate of reaction may be determined by knowing the rate constant.

Thus, option 2 is correct.

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The atoms that are the same element are atoms 1 and 2, because they have the same number of protons (option D).

Element is one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.

The atoms of an element have the same number of protons, which is the atomic number.

According to the table given above, three atoms and their respective proton, electron and neutron number are given.

It can be said that atoms 1 and 2 are of the same element, because they have the same number of protons.

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