226
) Which equation represents the radioactive decay of Ra?
88

Answer:

B.....................

Explanation:

....... ......... .......... ......... ............ ....... ...

Answer:

Explanation:

47 i took the test

Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom. Based on this information, the mass number of the silver would be 107.

The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.

As given in the problem Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom.

The atomic number of the silver =  number of protons

                                                     = 47

The mass number of the silver = number of protons + number of neutrons

                                                   =47 + 60

                                                   =107

Thus, based on the given information the mass number of the silver would be 107.

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Answer:

The number of moles of carbon dioxide that would be produced is 2 moles

Explanation:

The given reaction is presented as follows;

O₂ (g) + 2CO (g) → 2CO₂ (g)

The parameters given are;

The mass of the carbon monoxide, m₁ = 70.0 g

The mass of the oxygen, m₂ = 32.0 g

The molar mass of carbon monoxide = 28.01 g/mol

The molar mass of oxygen gas O₂ = 32.0 g/mol

The number of moles, n = (The mass)/(The Molar Mass)

The number of moles of carbon monoxide in the reaction = 70.0 g/(28.01 g/mol) = 2.49910746 moles ≈ 2.5 moles

The number of moles of oxygen in the reaction = 32.0 g/(32.0 g/mol) = 1 moles

Therefore, from the chemical reaction, we have;

One mole of O₂ reacts with two moles of  CO  to produce two moles of CO₂ (g)

1 mole of oxygen produces 2 moles of carbon dioxide

Therefore, given that the number of moles of oxygen in the reaction is 1  mole, we have that the number of moles of carbon dioxide that would be produced = 2 moles.

Answer:A

Explanation: reactants: Na2SO4 and SrCl2

Products: NaCl and SrSO4

Lm/aooooo was that supposed to be a quesadilla?

Answer:

why it just a mistake everyone make a mistake i belive in you.

Explanation:

Answer:

A. To make money

Explanation:

Answer:

hi

Explanation:

A. to make money

have a nice day

bye

Batteries come in all shapes and sizes, and depending on the type of battery, the minerals that compose them are mainly lithium, cobalt, graphite, nickel and manganese.

Answer:

See the answer below

Explanation:

The cross that would produce the maximum number of offspring with green sea pods would be:

1. GG x GG, or

2. GG x gg

The first one would produce all green offspring with homzygous genotypes as follows:

     GG   x   GG

 GG   GG   GG   GG

The second cross would produce all green offspring with heterozygous genotypes as follows:

      GG   x   gg

   Gg   Gg   Gg   Gg

Explanation:

When zinc reacts with dilute hydrochloric acid, it is a metal-acid reaction to produce zinc chloride and hydrogen gas.

Zn (s) + 2HCl (aq) => ZnCl2 (aq) + H2 (g)

Ionic equation:

Zn2+ (aq) + 2Cl- (aq) => ZnCl2 (aq)

It provides the plant cell with structure and support, along with protection from bursting due to turgor pressure

Explanation:

Mass of Silver chloride-AgCl =  28.314 g

Given

1.01 L of a 0.196 M solution of Silver nitrate

Required

Mass of Silver chloride

Solution

Reaction

AgNO₃ + NaCl ⇒ AgCl + NaNO₃

mol of AgNO₃ :

mol = M x V

mol = 0.196 x 1.01

mol = 0.198

From equation, mol ratio of AgNO₃ : AgCl = 1 : 1, so mol AgCl = 0.198

mass AgCl (MW=143 g/mol)  :

mass = mol x MW

mass = 0.198 x 143

mass = 28.314 g

Answer:

For a: The increasing of atomic radius is:

Al < Mg < Na

For b: The pH of the solution of sodium oxide is greater than 7.

Explanation:

Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.

It decreases as we move from left to right in a period because electrons get added up in the same shell and effective nuclear charge increased which results in the shrinkage of the atom.

Sodium lies in Period 3, group 1. Its atomic radius is 1.90

Magnesium lies in Period 3, group 2. Its atomic radius is 1.60

Aluminium lies in Period 3, group 3. Its atomic radius is 1.32

The increasing of atomic radius will be:

Al < Mg < Na

The mathematical values proves the result.

There are 3 types of solution based on pH:

When a metal reacts with oxygen present in air, it forms basic oxide which simply means when they react with water, they form basic solution.

The chemical equation for the reaction of sodium (metal) with oxygen present in air and reaction with water of the product so formed are as follows:

[tex]4Na+O_2\rightarrow 2Na_2O[/tex]

[tex]Na_2O+H_2O\rightarrow 2NaOH\text{ (base)}[/tex]

Sodium forms a basic solution when its oxide reacts with water, therefore the pH of the solution will be greater than 7.

Answer:

Well if glaciers were to most likley melt wit would have a big affect on the world. But on Florida the affect would be as everybody would expect, a flash flood, with high water's and everything under water. AND there would most lilkley be something in the glacier. Not highly sure about it though

Explanation:

Hope this helps!

Pls mark brainlest!

Moles in the container : 0.306

Given

30 g of H3PO4

Required

moles in container

Solution

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12  

1 mole = 6.02.10²³ particles  

While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule  

MW of H3PO4 = 3.1 + 31 + 4.16 = 98 g/mol

mol = mass : MW

mol = 30 : 98

mol = 0.306

Answer:

b. CaCl2

Explanation:

It consists two elements

The substance that can be said to be a compound would be = CaCl2. That is option B.

A chemical compound is defined as the substance that is made up of two or more elements that are chemically combined together.

Typical examples of chemical compounds include the following:

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The empirical formula : MnO₂.

Given

632mg of manganese(Mn) = 0.632 g

368mg of oxygen(O) = 0.368 g

M Mn = 55

M O = 16

Required

The empirical formula

Solution

You didn't include the pictures, but the steps for finding the empirical formula are generally the same

Mn : 0.632 : 55 = 0.0115

O : 0.368 : 16 =0.023

Mn : O =

[tex]\tt \dfrac{0.0115}{0.0115}\div \dfrac{0.023}{0.0115}=1\div 2[/tex]

The empirical formula : MnO₂

Answer:

Glucose

Explanation:

hope it helps

Explanation:

I think the notation used to represent beta is B

Answer:

[tex]\frac{0}{-1} \beta[/tex]

Explanation:

A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]

Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.

Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.

~Wikipedia

Answer:

As sodium and potassium both are alkali metals that belong to Group IA of the periodic table. They have one valence electron in their valence shell. As we move from top to bottom, the reactivity of metallic elements of Group IA increases.

Answer:

Cs+ and F-

Explanation:

The compound CsF is made up of two elements; Caesium (Cs) and F (Flourine)

Caesium is a metal and would therefore lose electrons - a cation is formed. When Caesium loses a single electron, the ion symbol is given as; Cs+

Flourine is a non metal and would therefore gain electrons - an anion is formed. When Flourine gains a single electron, the ion symbol is given as; F-

Hence the correct option is;

Cs+ and F-

Answer:

Sunlight

Explanation:

Sunlight is always neccesary in photosynthesis

Answer:

Carbon Dioxide + Water + Sunlight → Glucose + Oxygen.

Explanation:

Answer:

P₂ = 1.05 atm

Explanation:

Given data:

Initial temperature = 24.0 °C (24+273 = 297 K)

Initial pressure = 0.900 atm

Final pressure = ?

Final temperature = 75 °C (75 + 273 =348 K)

Volume = constant

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

0.900 atm / 297 K = P₂/348 K

P₂ = 0.900 atm × 348 K / 297 K

P₂ = 313.2 atm. K /297 K

P₂ = 1.05 atm

yes both B and D are correct

Catalysts lower the activation energy of the reaction therefore, the rate of reaction will increase. Therefore, option B, D are correct.

Catalysis can be defined as the process of enhancing the rate of a reaction by adding a substance or chemical compound known as a catalyst. Catalysts are usually not consumed in the chemical reaction and can be recovered unchanged after the completion of the reaction.

The catalyst can be recycled quickly, and little amounts of catalysts are sufficient for mixing, temperature, and surface area are factors in the reaction rate. The catalyst reacts with one or more reactants to generate intermediates that provide the final product.

The addition of a catalyst can lower the activation energy of reactant molcules, therefore, increasing the rate of the reaction. Because catalysts increase in frequency the successful collision as more reactant molecules have activation energy.

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Answer:

Explanation:

Conduction involves transfer of heat energy through a solid medium; convection involves heat transfer of fluid particles in their masses, while thermal radiation is transfer via electromagnetic waves in a vacuum.

I hope this was helpful.

Lets study what conduction, convection and radiation are:

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Answer:

sodium sulfate

Explanation:

For naming an ionic compound with polyatomic anion, the metal is written first using its element name followed by name of the polyatomic anion. Therefore, the compound with Na+Na+ cation and SO2−4SO42− anion is named as sodium sulfate.

Answer:

Radioactive

Explanation:

:D

Answer:

c-Radioactive

Explanation:

Answer:

height is the answer

Explanation:

none of the others work