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Answer:

a and d

Explanation:

a bromine and the calcium atom loses two elections

Answer:True

Explanation:

Iv done this before

Answer:

A. The ratio of the element in glucose is different than in ethanol

Explanation:

The compounds given are;

      Glucose      C₆H₁₂O₆

     Ethanol         C₂H₆O

The two compounds given are different from one another. But they have the same elemental composition.

   Ethanol is made up of Carbon, hydrogen and Oxygen and so also, Glucose

Now,

  The number of atoms in both compounds are different;

                                   Number of atoms

                        C                             H                     O

Glucose           6                             12                      6

Ethanol            2                              6                       1

Answer:

On the pereiodic table.

Explanation:

Answer:

A. Molecules have finite volume.

Explanation:

Gases deviate from the ideal gas law at high pressures because its molecules have a finite volume.

Real gases have a finite volume which enables more interaction between the molecules while ideal gases are assumed not to have a finite volume or occupy space which is why it lacks any form of interaction between its molecules.

This difference is the deviation between the real and ideal gases.

The correct Lewis dot structure for [tex]BeH_2[/tex] is Be : H : H

The Lewis dot structure shows the valence electrons as dots. The valence electrons of beryllium are shown as 2 dots on the left side of the atom.

The central atom, beryllium, has 2 valence electrons where each hydrogen atom has 1 valence electron. To form a stable molecule, beryllium shares its 2 valence electrons with the 2 hydrogen atoms, each of which shares its 1 valence electron with beryllium which gives each atom a full outer shell of electrons.

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Answer:

I would say discovering who invented the radio.

Explanation:

The other ones can be solved by experiments and the "discovering who invented the radio" cannot be solved by an experiment.

hope this helps.

Answer:

I would say who invented the ratio

Explanation:

Well you dont need to use the scientific method to know WHO discovered it, you use it to determine HOW

Answer:

hahahaha the soappp is dirty and the floor gets clean

Answer:

The correct answer is - rain.

Explanation:

At 32 degrees c or zero degrees Celsius, droplets of water in the atmosphere do not freeze as it is not the temperature at which water freezes but it is the temperature at which ice melts.

At this temperature the water changes its state, below 32 degrees Fahrenheit the water freezes but in the atmosphere, it not freezes necessarily and remains in the liquid state and called super-cooled liquid or water. Above this temperature, water in liquid state.

Thus, the precipitation is in the form of rain.

Answer:

ooooooooooooooooooh i dont know this one

Explanation:

im not good a math at all

Answer: A. The greater the pressure, the more of gas that will dissolve.

Explanation: Increasing pressure increases the solubility of gases. It has little effect on the solubility of liquids and solids.

Answer:

they all have the same ionic charge.

Explanation:

Alkaline earth metals are group 2 metals on the periodic table. They are divalent elements because they have two valence electrons and ionize by donating these two valence electrons. Elements in this group have the same numbers of electrons in their outermost shell of their atoms. i.e. they all have the same number of valence electrons and ionic charge.

Answer:

Explanation:

During active transport, molecules move from an area of low concentration to an area of high concentration. This is the opposite of diffusion, and these molecules are said to flow against their concentration gradient.

When there is a whole transfer of valence electron between the atoms is called an ionic bond. In this type of bond construction, the atoms get contrarily charged.

The ionic bonds are formed due to electronegativity. According to Pauling, the capability of an atom to draw electrons towards itself is called electronegativity.

When there is a huge contrast in electronegativity between the atoms, the electrons are completely transferred between the atoms.

The atom that relinquishes an electron are called a cation and is positive whereas the atom that acquires an electron are called anions and are negatively charged.

Therefore, due to electronegativity, ionic bonds are formed.

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The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

• Determine the mass ratio of the constituent elements of the compound.  

• Determine the mole ratio by dividing the percentage by the atomic mass

The empirical formula :

mol ratio Mg : N ⇒

[tex]\tt =\dfrac{72}{24~g/mol}\div \dfrac{28}{14~g/mol}\\\\=3\div 2\rightarrow Mg_3N_2[/tex]

Answer:

Iron(II) oxide

Explanation:

Iron(II) oxide or ferrous oxide is the inorganic compound with the formula FeO. Its mineral form is known as wüstite.

Answer:

18

Explanation:

In neutral atom protons and electrons are equal in number as it atomic number or proton number is 18 so electrons are also 18

The total number of electrons in an atom of an element with an atomic number of 18 and a mass number of 40 is 18.

Atomic mass can be defined as the total number of neutrons and protons located in nucleus of an element while atomic number is the number of protons present in the nucleus of element.

Atomic mass can be defined as the average weight of an element where as the atomic number is the total number of protons present in the nucleus; Atomic mass have the  symbol A while atomic number have the symbol the letter Z.

Different isotopes of an element are differentiated by atomic mass is while isotopes share the same atomic number, in neutral atom protons and electrons are equal to atomic number or proton number is 18 and electrons are also 18

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Answer:

22.4L

Explanation:

not sure if its totally correct but I tried

The difference between the monomer and a polymer should be that monomer should be larger than a polymer.

The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.

Also, it represent the building blocks of polymers that contain more complex type of molecules

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Answer:

A

Explanation:

Answer:

Non-metals because it has 9 electrons meaning it is fluorine

Explanation:

Answer: 28 days.

Hope this helps...... Stay safe and have a Merry Christmas!!!!!!!!! :D

Answer:

Advantakes= it is a renewable source, you can but it anywhere with sunlight

disatvantage= it cost a lot to place/replace, it uses a lot of different materials

Answer:

3.8 x 10²⁴molecules

Explanation:

Given parameters:

Number of moles  = 6.32moles

Unknown:

Number of molecules  = ?

Solution:

The number of moles can be used to derive the number of molecules found within a substance.

Now,

       1 mole of substance contains 6.02 x 10²³ molecules

     6.32 mole of PBr₃ will contain 6.32 x 6.02 x 10²³ = 3.8 x 10²⁴molecules

Answer:sulfer by itself is not pleasant and it can be dangerous by itself but in large amounts.

Explanation:

Answer:

True.

Explanation:

Also did you know that it is combined with chlorine that it becomes salt? Cool right? Two deadly things combining to become a condiment

Answer:

5 million

Explanation: