Which of the following is not among the three types of mineral types of mineral

A given element must have the same number of protons as neutrons and electrons, this is not a requirement. No other element has an atom with two protons besides helium, which has two protons in every atom.

An electrical force keeps electrons in their shells. An atom's protons and electrons are drawn to one another. They are both electrically charged. Electrons have a negative charge (-), while protons have a positive charge (+).

Electrons are present outside the atom's nucleus, in contrast to protons and neutrons, which are contained inside the nucleus at its center. Negative electrons are drawn to the positive nucleus because the electric charges of opposite polarity attract one another.

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The complete question is -

Does a given element always have the same number of each particle? Why or why not? Using periodic table, give some specific examples.

A balanced chemical equation [tex]Zn (s) Zinc + H_{2} SO _{4 }\ (aq) Sulfuric acid → ZnSO _{4}\ ( aq) Zincsulfate (aq) + H {_2} (g) Hydrogen.[/tex]

Zinc is a transition metal with atomic number 30 and is shown in the periodic table with the symbol "Zn". Zinc is one  of the cheap metals that we  use every day. It is part of the elements that humans have expanded over thousands of years.

Zinc (Zn) is a soft metal with a particularly stable electrical structure (fully filled stable configuration). As a result, their metal joints are weak. They have a high oxidizing power up to  oxidation state 2.

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Answer

2.0 x 10²³ molecules.

Explanation

Given:

The number of moles of theobromide measured out = 0.333 moles.

MM of theobromide = 180.8 g/mol

What to find:

The number of molecules of theobromide the student measured.

To go from moles to molecules, multiply the number of moles by Avogadro's number.

The Avogadro's number = 6.02 x 10²³

1 mole of theobromide contains 6.02 x 10²³ molecules.

So, 0.333 moles of theobromide measured out will have (0.333 x 6.02 x 10²³) = 2.0 x 10²³ molecules.

Step 1

The equation for the boiling point elevation used here:

m = molality, which is calculated as follows:

Kb = boiling constant

-------------------------

Step 2

Information provided:

Solute = C9H8O

Solvent = carbon tetrachloride

Mass of solute = 97.1 mg

(1 g = 1000 mg => 97.1 mg x (1 g/1000 mg) = 0.0971 g)

Mass of solvent = 1.00 g

(1 kg = 1000 g => 1.00 g x (1 kg/1000 g) = 1x10^-3 kg)

---

Information needed:

The molar mass of solute = 132.1 g/mol (please, the periodic table is useful here)

-------------------------

Step 3

The number of moles of solute: n

n = mass of solute/the molar mass of solute = 0.0971 g/ 132.1 g/mol = 7.35x10^-4 moles

----

Molality, m:

m = moles of solute/mass of solvent (kg) = 7.35x10^-4 moles/1x10^-3 kg = 0.735 moles/kg or m

----

The boiling point elevation:

ΔTb = Kb x m = 5.03 °C/m x 0.735 m = 3.69 °C

Answer: ΔTb = 3.69 °C

Answer:

2.41 molecules.

Explanation:

hope this helps!

As per scientific notation rules,scientific notation of 6.0×10^4÷4.0×10^8 value is 1.5×10[tex]^-4[/tex].

Scientific notation is defined as  a way of expressing  numbers which are too large or too small so that they can be easily written in decimal form. It can be referred to the scientific form or the scientific index form  or even the standard form.

Base ten notation is used by scientists, engineers  as it  helps in simplification of arithmetic  operations.  It contains the significant figures  which include all non-zero numbers , the zeroes between significant digits and zeroes which are needed to be significant.

In scientific notation, the base should always be ten. The exponent should be a non-zero integer and it can be either positive or negative.

For example , in the given problem 6.0×10^4=60,000 and 4.0×10^8=40,00,00,000

∴60,000÷40,00,00,000=0.00015 which in scientific notation is expressed as 1.5×10[tex]^-4[/tex]

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Answer: Neils Bohr

Explanation: Development of the Atomic Theory. In 1913, Neils Bohr, a student of Rutherford 's, developed a new model of the atom. He proposed that electrons are arranged in concentric circular orbits around the nucleus. This model is patterned on the solar system and is known as the planetary model.

Answer:

The answer is C) She should drop two balls with different masses from the same height.

Explanation:

Since they want to test the effect of MASS on kinetic energy, they should have different masses but have them both fall from the same height in order to see the difference the mass makes.

A student should drop two balls with different masses from the same height to determine the effect of mass on kinetic energy. Therefore, option (C) is correct.

Kinetic energy (KE) can be described as the energy possessed by a moving body due to its motion. Work will be done when there is a change in the kinetic energy of an object. The kinetic energy is represented as K.E. = ½mv²  where ‘m’ is the mass and ‘v’ is the velocity of the object.

Potential Energy (P.E.) can be defined as the energy stored by an object due to the position of the object and can be written in the form of an equation as P.E. = mgh where ‘m’ is the mass,  ‘h’ is the height in meters and ‘g’ is the acceleration due to gravity.

The kinetic energy of an object depends upon its mass of the object. Therefore, to understand the effect of mass on kinetic energy, drop two balls with different masses from the same height.

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In this question, we have the following reaction:

2 H2O2 + N2H4 -> 4 H2O + N2

The reaction is already balanced, the molar ratios are:

2 H2O2 = 1 N2H4

2 H2O2 = 1 N2

1 N2H4 = 1 N2

We have the following mass given in the question and the molar mass:

8.82 grams of H2O2, molar mass = 34.01g/mol

6.81 grams of N2H4, molar mass = 32.04g/mol

N2 molar mass = 28.02g/mol

Now we need to find the limiting reactant, we will start by the H2O2

34.01g = 1 mol

8.82g = x moles

x = 0.26 moles of H2O2 in 8.82 grams

According to the molar ratio, we will need the number of moles of H2O2 divided by 2 in order to find the number of moles of N2H4

0.26/2 = 0.13 moles of N2H4

Now we need to check if we have 0.13 moles of N2H4 or we have more of it:

32.04g = 1 mol

6.81g = x moles

x = 0.212 moles of N2H4, but we only need 0.13 moles, therefore we have an excess of N2H4 and H2O2 is the limiting reactant

Now we need to find the final mass of N2, we will do that by using the number of moles of the limiting reactant, H2O2 0.26 moles, and according to the molar ratio between H2O2 and N2, we need 0.13 moles of N2 being produced, using this number of moles and its molar mass, we can find the final mass:

28.01g = 1 mol

x grams = 0.13 moles

x = 3.64 grams of N2 is produced

Answer = 3.64 grams of N2

There are 30 atoms in 2Sr3(PO4)2.

In the given formula there are 2 molecules of Sr3(PO4)2.

To find the number of atoms in molecules by looking at the molecular formula, we must count the presence of each atom in the molecule.

To calculate the total number of atoms, we first calculate the number of atoms for 2Sr3(PO4)2.

Number of Strontium atoms = 3*2 = 6

Number of Phosphorus atoms = 1*2*2 = 4

Number of Oxygen atoms = 4*2*2 = 16

Total number of atoms =6+4+16=30

So, there are 30 atoms in 2Sr3(PO4)2.

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The balanced equation that can be used to fond the heat of formation is;

[tex]Ba(s) + C(s) + \frac{3}{2}O_{2} (g) ----- > BaCO_{3} (s)[/tex]

The heat of formation is defined as the heat that is evolved or absorbed when a substance is formed from its component elements under standard conditions. Note that the components of the equations must be the substances that are in standard form.

In this case, we are trying to see the balanced chemical equation for the reaction used to calculate ΔH∘f of BaCO3(s). We have to know that is equation must have to involved the barium, carbon and oxygen atoms as the barium carbonate compound is formed.

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An atom is a complicated configuration of negatively charged electrons grouped around a positively charged nucleus in certain shells. Protons and neutrons make up the majority of the atom's mass in this nucleus (except for common hydrogen which has only one proton).

Fireworks' vibrant colors come from mineral components. Bright greens are produced by barium, deep reds by strontium, blues by copper, and yellow by sodium.

Types ;

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Both radium and calcium will concentrate on our bones. Suitable statements are A and D Calcium and radium are group 2 elements. Both will concentrate on our bones due to their similar chemical properties.

Radium and calcium are alkaline earth metals, meaning they proportion a number of equal chemical homes due to each in their atom's outer shells containing two valence electrons. although radium is radioactive and calcium isn't, the frame can't distinguish among these factors that appear to act in an identical manner.

The paint contained radium. even as radium is only faintly radioactive, the women were informed to lick their paintbrushes to present the finer points. This led to complaints that had been influential in the early levels of workplace safety law within the U.S.

Young ladies painted face dials with radioactive fabric. Unaware that the paint turned into dangerous, they would locate the brush tip on their lips to acquire a nice point. After being laid low with radium poisoning, numerous younger girls sued their employers and brought national attention to the safety of people.

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[tex] \huge \color{basic}{ \boxed{ \tt{✐Answer:}}}[/tex]

The Radium Girls experienced devastating health outcomes from ingesting radium from their paint brushes. We know that both radium and calcium will concentrate in our bones. Why might this be, and why might radium be damaging to our bones while calcium is not?

Choose ALL correct answers.

☑︎ A. Radium and calcium will both form 2+ cations but radium is more reactive and more unstable.

☐ B. Radium and calcium will both form 2+ anions but radium is more reactive and more unstable.

☐ C. Calcium and radium are period 2 elements. Both will concentrate in our bones due to their similar chemical properties.

☐ D. Calcium and radium are group 2 elements. Both will concentrate in our bones due to their similar chemical properties.

________________________________

The correct answer is letter [tex] \large \bold{A}[/tex]

The equation of the dissociation of the compound is [tex]AgNO_{3} (s)---- > Ag^{+} (aq) + NO_{3^{-} (aq)[/tex]

The term dissociation has to do with the process by which a substance is broken up into its constituents. Now we know that the electrolytes are composed of ions. These ions are the charge carriers that are responsible for the fact that the solution is able to be a conductor of the electric current as we know the electrolytes to be as usual.

We can now write the equation of the dissociation from the equation; [tex]AgNO_{3} (s)---- > Ag^{+} (aq) + NO_{3^{-} (aq)[/tex]. The water has been omitted as was instructed in the question.

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The equation for the dissociation of the electrolyte AgNO₃(aq) is:

[tex]\rm AgNO_3\rightarrow Ag ^+ + NO_3 ^-[/tex]

Dissociation is defined as a broad process in which molecules (or ionic compounds like salts, or complexes) split or separate into different elements like atoms, ions, or radicals, typically in a reversible way.

We now know that ions make up the electrolytes. These ions are the charge carriers that make it possible for the solution to serve as a conductor of the electric current in the manner that we have come to expect from electrolytes.

Thus, the equation for the dissociation of the electrolyte AgNO₃(aq) is:

[tex]\rm AgNO_3\rightarrow Ag ^+ + NO_3 ^-[/tex]

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Answer: calcium is metal and carbon and oxygen is non metal. If you place the chalk in the water there won’t be any chemical reaction

Explanation: Hope my answer is helpful

The energy levels from lowest to highest energy is 1s, 2s, 2p, 3s, 3p, 4s, 3d and is therefore denoted as option A.

This is referred to as a fixed distance of electrons from the nucleus of an atom and is the energy an electron has when it is above ground state and starts with the 1s.

The appropriate energy level from the least to the highest is in the order of 1s, 2s, 2p, 3s, 3p, 4s, 3d and they have the distinct number of electrons they contain thereby making option A the most appropriate choice.

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A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another. Starting ingredients are always pure elements combined with an aqueous compound, such as pure hydrogen gas or zinc metal.

Two pure elements and one aqueous compound or solution are required for all single-replacement reactions. The A and C in the aforementioned reaction would be pure elements. Zn + 2HCl > ZnCl2 + H2 is an example of a single-replacement reaction in detail.

You must make use of a "Activity Series" table to ascertain whether a certain single replacement will take place. A single displacement reaction will take place if the metal or halogen is above the element it would replace according to the activity series.

In a compound, one element takes the place of another to create a new material. The number of reactants and products in a single replacement reaction is equal.

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When compounds are heated they undergo physical changes but new molecules created or existing molecules lost. The common things for the given two changes are they both conserve mass and caused by heating.

Physical changes include, change in state or phase of a substance. For example, boiling a liquid converts the liquid state into gaseous state. Similarly melting, crystallization, solidification etc. are physical changes.

During a physical change, no bond making or breaking occurring as well as no molecules or atoms are created. Similarly existing molecules cannot be lost.

According mass conservation law, during a chemical or physical change mass of a substance remains constant. Thus reactants have the same as total mass of products.

Therefore, the two common things in the two changes are they are caused by heating and both conserve mass. Thus, option A and C are correct.

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The unit for volume in W/V% when mass is in grams is mililiters, g/mL, therefore this statement is false

Answer:

the answer is B

Explanation:

because i just choose the answer

Through the alveoli,  oxygen inhaled through the lungs enter the bloodstream.

The respiratory system is a biological system consisting of certain organs and structures used for gas exchange in animals and plants. The anatomy and physiology that cause it to vary greatly depending on the size of the organism, the environment in which it lives, and its evolutionary history. In terrestrial animals, the respiratory surface is inserted into the mucous membranes of the lungs. Gas exchange in the lungs takes place in millions of tiny air sacs; in mammals and reptiles, they are called alveoli and in birds atrium. These microscopic air sacs have a very rich circulation, which brings the air into close contact with the blood.

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Answer

Decomposition

Explanation

2CO2(g) → 2CO(g) + O2(g)

The reaction of carbon dioxide to form carbon monoxide and oxygen as shown above is a decomposition reaction.

A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products.

In the reaction, a single reactant carbon dioxide breaks down or decomposes to form carbon monoxide and oxygen.

The average seismic wave speeds at a depth of 90 km in volcanic areas, They typically travel at speeds ranging from 1 to 14 km/h. The slower values represent a P-wave traveling in water, while the higher numbers represent a P-wave speed near the Earth's mantle's core.

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Answer

11302.2 joules

Explanation

Given:

Mass of water = 30.0 g

Initial temperature, T₁ = 10⁰ C

Final temperature, T₂ = 100⁰ C

Increase in temperature, ΔT = T₂ - T₁ = 100⁰ C - 10⁰ C = 90⁰ C

What to find:

The energy in joules required to increase the temperature of the water.

Step-by-step solution:

The joules required to increase the temperature of the water can be calculated using the formula:

q = mcΔT

Where q is the joules of energy required.

m is the mass of water = 30.0 g

c is the specific heat of water = 4.186 J/g ⁰C

ΔT is the temperature rise = 90 ⁰C

∴ q = 30.0 g x 4.186 J/g ⁰C x 90 ⁰C

q = 11302.2 joules

Hence, 11302.2 joules are required to increase the temperature of 30.0 g of water from 10⁰ C to 100⁰ C vapors.

The step comes after the observation stage in the scientific method

The scientific method is the process of objectively establishing  facts through testing and experimentation. The basic process involves making an observation, formulating a hypothesis, making a prediction, conducting an experiment and finally analysing the results.

7 steps of the scientific methods are  

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First, let's put the info into symbols:

As the mole fractions have to add up to 1, we can calculate the water mole fraction, substracting:

If we make the supposition that we have 1 mole of the solution, we would have the next quantities of each substance:

Now, we can convert these moles into mass through the molecular weight of each substance:

Now, we can calculate the mass percentage, because we have the mass of the substrate and the mass of the solution (the addition of water and iron (II) bromide):

The answer is that the %m/m of iron bromide in the solution is 44.020%

Answer

A. None of these

Explanation

Gamma rays are ionizing electromagnetic radiation, obtained by the decay of an atomic nucleus. Gamma rays are more penetrating, in the matter, and can damage living cells to a great extent. Gamma rays are used in medicine (radiotherapy), industry (sterilization and disinfection), and the nuclear industry.

Thus, gamma rays are used for all the options given in B - D. So the correct answer is option A. None of these

Meiosis starts with half the number of chromosomes as Mitosis = True

The genetic offspring are exactly like the parent call = False

There are 23 chromosomes from each parent cell = True

Meiosis goes through 2 stages of division, meiosis i and ii = True

---------------------------------------------------

Hope this helps!

Have a great day and God bless! :)

If you drove a car that got 30 miles per gallon, you would have to drive 6,200 miles to travel 186,000 miles.

What is travel?
Travel is the movement of people between geographically distant regions. Travel can be done on foot, bicycle, automobile, rail, boat, bus, airline, ship, or other mode of transportation, with or without luggage, and can be one way or round trip. As in the case of tourism, travel might sometimes include relatively short stops between subsequent movements. The meaning of the word "travel" is very certainly lost to history. The name "travel" may have sprung from the Old French word travail, which meant "labour." According to the Merriam-Webster dictionary, the word travel was first used in the 14th century.

If you drove a car that got 30 miles per gallon and you had a tank that held 20 gallons, you would have to drive 6,200 miles to use up a full tank of gas. You would need to drive back and forth 186,000 / 6,200 = 30 times to travel 186,000 miles.

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