How many kilograms of HNO3 are consumed to produce 112kg Ca(H2PO4)2 in this reaction?
Ca3(PO4)2 + 4HNO3 → Ca(H2PO4)2 + 2Ca(NO3)2 (Balanced equation)

Answer:

the direction of a chemical equation is reversed, the arithmetic sign of its ΔH is changed (a process that is endothermic in one direction is exothermic in the opposite direction).

Explanation:

the direction of a chemical equation is reversed, the arithmetic sign of its ΔH is changed (a process that is endothermic in one direction is exothermic in the opposite direction).A positive ΔHº value represents an addition of energy from the reaction (and from the surroundings), resulting in an endothermic reaction. A negative value for ΔHº represents a removal of energy from the reaction (and into the surroundings) and so the reaction is exothermic.Every chemical reaction occurs with a concurrent change in energy.

The change in enthalpy equals heat at constant pressure.

Enthalpy changes can be expressed by using thermochemical equations.

Enthalpy changes are measured by using calorimetry.What happens to the value of ∆H for a thermochemical reaction if the reaction is reversed? A. ∆H has the same numerical value, and the sign changes.Every chemical reaction occurs with a concurrent change in energy.

The change in enthalpy equals heat at constant pressure.

Enthalpy changes can be expressed by using thermochemical equations.

Enthalpy changes are measured by using calorimetry.What happens to the value of ∆H for a thermochemical reaction if the reaction is reversed? A. ∆H has the same numerical value, and the sign changes.

The alkali metals hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (F) are found in Group 1A of the periodic table (Fr).

Because of the orderly arrangement of the elements, it is known as the periodic table. They're arranged in rows and columns, as you'll see. The vertical columns that go from top to bottom and the horizontal rows that travel from left to right are referred to as Periods and Groups, respectively.

All known elements are grouped together in the periodic table of elements into groups with related properties. As a result, it becomes a vital tool for chemists, nanotechnologists, and other researchers. If you can utilize and understand the periodic table, you can predict how compounds will react.

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The mass of the liquid gold is 25 grams because the same number of atoms will be present in the liquid and the solid.

The smallest component of ordinary matter that makes up a chemical element is an atom. Atoms that are neutral or ionised make up every solid, liquid, gas, and form of plasma. Atoms are incredibly tiny, usually measuring 100 picometers across.

The smallest piece of matter that can be divided without sending electrically charged particles flying. It is also the smallest piece of matter with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.

According to the given value;

The density will decrease from 19.30 g/cm3 (solid gold room temp) to 17.31 g/cm3 (at melting point). And volume will increase because the atoms will be loosely connected.

The mass of the liquid gold is 25 grams because the same number of atoms will be present in the liquid and the solid.

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Answer:

0.1375 mol of it has a mass of 58.61 g.

One mole of it will have a mass of

0.1375 divide by 58.61

=0.00234601604g (molar mass of compound).

The  volume of the 1.11 carat diamond is  63.2 mL.

The volume of the 1.1 carat diamond is determined as follows:

density of diamond = 3.51 g/mL

mass of 1.11 carat diamond = 200 * 1.11

mass of 1.11 cart diamond = 222 g

volume of 1.11 carat diamond = 222 g/3.51 g/mL

volume of 1.11 carat diamond = 63.2 mL

In conclusion, the volume of the 1.11 carat diamond is obtained from the ratio of the mass and the density of diamond.

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The molecular formula is [tex]C_{7} H_{21} F_{7}[/tex].

There are several formulas that a compound could have. The empirical formula is the simplest formula of the compound. It is the formula that shows the ratio of the atoms of each of the elements present. The molecular formula shows the number of atoms of each element that is present in the compound. The structural formula is the formula that shows the arrangement of the atoms in the molecule.

Now we want to obtain the empirical formula using the following procedure;

Mass of carbon = 0.1935 g

Number of moles of carbon = = 0.1935 g/ 12 g/mol = 0.016 mole

Mass of hydrogen = 0.0325 g/1 g/mol = 0.0325 moles

Mass of fluorine =  0.2043 g/19 g/mol = 0.011 moles

We now have to divide through by the lowest number of moles to obtain the empirical formula;

C - 0.016 mole/0.011 moles   H - 0.0325 moles/0.011 moles F- 0.011 moles /0.011 moles

C – 1  H – 3 F – 1

The empirical formula is [tex]CH_{3} F[/tex]

Molar mass of the empirical formula = 12 + 3 + 19 = 34 g/mol

Molecular formula = 34n = 240.23

n = 240.23/34

n = 7

The molecular formula is [tex]C_{7} H_{21} F_{7}[/tex].

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Answer:

Explanation:

The atomic weight of iron (Fe) is 55.845 u. Since it's impossible to count the amount of atoms in a given mass of a substance, we measure atoms in moles. No matter what the element or compound is, there will be [tex]6.022 * 10^{23}[/tex] atoms in one mole of compound. This is called Avogadro's number. Atomic weight, also called molar mass, is measured in grams per mole. We first find the number of moles of iron in 3.47 grams by setting up an inequality: [tex]\frac{55.845 g}{1 mol} = \frac{3.47 g}{x mol}[/tex]. Solving this inequality shows that there are 0.06213627 moles of iron in 3.47 grams. Now, all we do is multiply that value by Avogadro's number, [tex]6.022*10^{23}[/tex]. This gives us 3.7418 * 10^22 atoms in 3.47 grams of iron.

Oxygen get oxidized in the following redox reaction  2KCIO₃(g) = 2 KCI(g) + 3O₂(g).

Redox is a kind of chemical response wherein the oxidation states of substrate exchange. Oxidation is the lack of electrons or growth inside the oxidation nation of a chemical or atoms inside it.

An oxidation-reduction reaction is a type of chemical reaction that includes a switch of electrons among two species. An oxidation-reduction response is any chemical response wherein the oxidation number of a molecule, atom, or ion modifications through gaining or dropping an electron.

The time period oxidation turned into used to explain reactions wherein a detail combines with oxygen. for instance, the oxidation of magnesium includes the chemical reaction between magnesium metal and oxygen to shape magnesium oxide.

Left hand side: K = +1; O = -2; Cl = +5

Right hand side: K = +1; Cl = -1; O = 0

here, the oxidation state of O changes from -2 to 0.

Therefore, the oxygen gets oxidized.

Disclaimer:- your question is incomplete, please see below for the complete question.

Which element is oxidized in the following redox reaction?

2KCIO₃(g) = 2 KCI(g) + 3O₂(g)

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The concentration in weight percent is 40%

The following data were obtained from the question:

Concentration in weight percent = (mass of sugar / total mass) × 100

Concentration in weight percent = (6.000 / 15.000) × 100

Concentration in weight percent = 0.4 × 100

Concentration in weight percent = 40%

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D. The option that is formed by the process of fusion in stars is elements.

When the new star reaches a certain size, a process called nuclear fusion ignites, generating the star's vast energy.

The fusion process forces hydrogen atoms together, transforming them into heavier elements such as;

Thus, the option that is formed by the process of fusion in stars is elements.

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Karen drove 0.3 hours to the east at constant velocity for 30 km. The velocity of Karen when she drove towards east is 100 km/ h.

Velocity is defined as a direction of movement of the body or the object.

It is a vector quantity. It is the rate of change of distance and rate of change of displacement.

It is a fundamental concept in kinematic, the branch of classical mechanics that describes the motion of body.

Velocity can be expressed as

Velocity = distance / time

              = 30km / 0.3 h

              = 100 km/h

Thus, the velocity of Karen when she drove towards east is 100 km/ h.

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The statement describes the advantage of this model of the solar system is  that The students can infer information about the effects of gravity on each planet. Option D

The solar system is composed of the sun and the planets. It has to do with a set up in which the sun lies at the center. We call this the heliocentric model of the solar system.

Given that we have taken the school to be the sun which lies at the center of the solar system and the position of the planets have been scaled using 1 AU = 100 meters (the length of a football field).

The only thing that is given in the options that we can not infer from this set up is the fact that; the students can infer information about the effects of gravity on each planet.

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A fundamental characteristic of an object, its inertia is quantified by its mass, which is a basic indicator of the volume of substance inside the thing.

What does the word "mass" mean?

In science, mass is a method for measuring inertia, a fundamental property of all matter. In essence, it's the resistance of a mass of matter to changing its direction or speed in reaction to the application of a force.

Why is mass important?

The celebration of the Eucharist, which is the main act of worship in the Roman Catholic Church, takes place during mass. The ecclesiastical Latin formula for the congregation's dismissal is where the word "mass" comes from.

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The total volume of the cylinder is 28.4 ml.

Volume is a measurement of three-dimensional space that is occupied.  Numerous imperial units or SI-derived units, such as the cubic metre and litre, are frequently used to quantify it numerically (such as the gallon, quart, and cubic inch).

Volume and length (cubed) have a symbiotic relationship. The volume of a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the amount of fluid (liquid or gas) that the container may hold. the following volume units:

• Metric units include litres, cubic centimetres, and cubic metres.

• US Standard: ounces, inches, feet, pints, and gallons

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alin sa sumusunod ang nagpapahayag ng tunay na pagmamahal batay sa mitong psyche at cupid

The magnetosphere protects the earth's atmosphere from the solar wind.

Hence, option (d) is correct.

The magnetosphere is the area of spcae, around the earth which is controlled by the magnetic field of the earth.

The magnetosphere is created because of the earth's own magnetic field which is generated from the outer core.

The magnetosphere is made up of plasma having charged particles, mainly electrons and protons,

The magnetosphere stretches from the earth's core out into space. Here it meets solar winds or solar radiation emitted by the sun. The magnetosphere is acting as a shield and protects the earth from harmful solar radiation.

Hence, the magnetosphere protects the earth's atmosphere from the solar wind.

Therefore, option (d) is correct.

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Answer: The answer is  magnetosphere

Explanation:

You will get it right.

It is fundamental to distinguish science from pseudoscience because science can help us to understand questions from the real world.

The term 'science' makes reference to all the body of knowledge obtained by using the scientific method, which is based on collecting empirical evidence that helps to test hypotheses or explanations (either confirm or reject them), that emerged by observing the real world.

Conversely, pseudoscience is not a discipline because it is not based on scientific evidence and therefore this type of data cannot be tested or verified, which is fundamental to progress in our understanding of the tangible characteristics of the real world.

In conclusion, it is important to distinguish science from pseudoscience because science can help us to understand questions from the real world and solve problems associated with our health and the environment.

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Answer:

The nucleus is a double-membraned organelle that contains the genetic material and other instructions required for cellular processes. It is exclusively found in eukaryotic cells and is also one of the largest organelles.

Answer:

True

Explanation:

A combustion reaction is when a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat. A combustion reaction always has oxygen as one reactant.

The balanced equation reveals a 3:2 molar ratio between O2 and KCl. Therefore,

(32.0 g O2 g/1 mol O2) (3 mol O2/2 mol KCl) (1 mol KCl/74.5 g KCl) (40.6 g KCl) = 26.2 g O2

When heated over 400 °C or in touch with strong acids, it decomposes, emitting poisonous gases such chlorine dioxide and chlorine fumes as well as oxygen. It breaks down into oxygen and perchlorate above the melting point.

Potassium chlorate (KClO3) breaks down into potassium chloride and oxygen gas when heated in the presence of a manganese dioxide catalyst.

The response provided in the query is a decomposition response. A decomposition reaction is one in which a chemical component is broken down into two or more new compounds by the action of heat, light, or electrical energy. Here, potassium chlorate breaks down to produce oxygen gas and potassium chloride.

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Answer:

The scientist used the law of Conservation of matter.

Explanation:

This law states the matter cannot be created or destroyed. Matter can however be rearranged.

Answer: The scientist used the law of Conservation of matter.

Explanation:

This law states the matter cannot be created or destroyed. Matter can however be rearranged.

Explanation:

above

The Confidence interval i.e, CI is calculated by the formula

CI= x±  zs/ √N

where,

z= Confidence level value

s= standard deviation

N= Total number of measurements taken

So, we know that,

For 95% confidence level,

z=1.96

For 96% confidence level ,

z= 2.58

We know that,

s= 0.27 mgCu/mL

x= 7.91 mg Cu/ mL

A)

99%CI = 7.91± 2.58×0.27/√1

= 7.91± 0.70 mgCu/mL

95% CI=  7.91± 1.96×0.27/ √1

= 7.91± 0.53mgCu/mL

B)

99%CI = 7.91± 2.58×0.27/√4

= 7.91± 0.35 mgCu/mL

95% CI=  7.91± 1.96×0.27/ √4

= 7.91± 0.26mgCu/mL

C)

99%CI = 7.91± 2.58×0.27/√16

= 7.91± 0.17 mgCu/mL

95% CI=  7.91± 1.96×0.27/ √16

= 7.91± 0.13 mgCu/mL

The  99% and 95% confidence level interval for single analysis can be calculated, and also for the mean of 4 and 16 analysis by changing the value of N.

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Answer:

Carbon with two single bond and one double bond is more reactive

1. The volume of the stock soluiton needed is 10 mL

2. The volume of water needed is 90 mL

The following data were obtained from the question:

M₁V₁ = M₂V₂

1 × V₁ = 0.1 × 100

V₁ = 10 mL

Thus, the volume of the stock solution needed is 10 mL

Volume of water = V₂ – V₁

Volume of water = 100 – 10

Volume of water = 90 mL

Thus, the volume of water needed is 90 mL

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You wish to prepare 189 grams of 5.70 % solution. You will need 10.773 grams of sodium acetate and 178.23  mL of water.

A solution is a homogenous mixture of a solute and a solvent. When two substance mixes perfectly together make a solution.

Given, that the density of water is 1.00 g/mL.

Preparation of 189 grams of 5.70 % solution.

Mass of CH₃COONa

189 x  5.70 / 100 = 10.773 grams

Mass of water = mass of solution – mass of solute

189 - 10.77 = 178.23 grams

Volume = mass / density

178.23 / 1.00 = 178.23  ml

Thus, the mass of sodium acetate is 10.773 grams, and the volume of water is 178.23  ml.

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If the reaction of 125 g of C₆H₆O₃ reacts in excess of oxygen (O₂) and produces 51. The calculations for the following are:

a. 51 grams.

b.  95.20 %

Percent yield is the calculation of the difference between actual and estimated yields.

C₆H₆O₃ + 3O₂ -------> 6CO + 3H₂O

Molar mass of C₆H₆O₃

6 x 12 + 6 x 1 + 3 x 16 = 72 + 6 + 48 = 126 g per mole.

So, 125 grams is 125 / 1 26 moles = 0.992 moles of C6H6O3.

From the equation, we can see that 1 part of C₆H₆O₃ reacts with 3 parts of Oxygen gas to give 6 parts of Carbon Monoxide and 3 parts of water.

So, 1 part = 0.992 moles

Hence, 3 parts of water is 0.992 x 3 = 2.976 moles of H2O.

Molar mass of H2O = 2 x 1 + 1 x 16 = 18 grams per mole.

So, 2.976 moles of H2O has a mass of 2.976 x 18 = 53.568 grams

So, the mass of water that should have been formed = 53.568 g

Thus, the grams of the excess reactant left over is 51 grams.

Percentage yield = (51 / 53.568) x 100 is 95.20 % (approx.)

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Answer:

If the reaction of 125g C6H6O3 REACTS in excess of O2and produced 51g of H2O what is the % yeild

Explanation:

Answer:

long pants

Explanation:

everything else is hazardous, and the long pants will protect your legs.