Use the diagram to identify each item.

Answer:

true.

Explanation:

Zn(s) + 2HCI(aq)=H2(g)+ZnCl2(g)

Answer:

more than one kind of atom. a solution of atoms and molecules.​

Explanation:

a compound always contains more than one type of atom.

Although the formula for sodium chloride is NaCl, the compound does not contain actual NaCl molecules. Rather, it contains equal numbers of sodium ions with a charge of positive one (Na+) and chloride ions with a charge of negative one (Cl−).

Explanation:

It is known that an electron pair represents a domain. Hybridization of BF_{3}BF3 will be calculated as follows.

       Hybridization = \frac{1}{2}[\text{Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge}]21[Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge]

Valence electrons of boron are 3 and no. of bonded atoms in a BF_{3}BF3 molecule is 3.

Therefore, calculate hybridization of BF_{3}BF3 as follows.

          Hybridization = \frac{1}{2}[\text{Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge}]21[Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge]

                              = \frac{1}{2}[3 + 3 + 0]21[3+3+0]

                               = 3

Hence, hybridization of BF_{3}BF3 is sp^{2}sp2 , that is, trigonal planar.

Thus, we can conclude that the given image represents that it is a trigonal planar molecule with three domains.        

Answer:

electron pair => 1 covalent bond => same as H:H

Explanation:

The bar notation is generally accepted as a pair of electrons depicting a 'single' chemical bond. If two bars are shown (e.g; C=C) then two chemical bonds are represented. If three bars are shown (e.g; N≡N) then three chemical bonds are represented. This is the highest number of bonds that can exist between two elements. Hope this helps. :-)

Answer:

CYTOPLASM

Explanation:

MOST REACTION REQUIRE WATER TO OCCUR

SINCE ENZYME WORK BEST WHEN DISSOLVED IN WATER

WATER IS PRESENT IN CYTPLASM HENCE IT IS MAIN SITE OF MEABLIC REACTIONS

Answer:

nnnnnnnnnnnnnnnnnnnnnn

Explanation:

jhhhhhhhhhhhhhhhhbhhhh

Answer:

the answer is A) aquifers

Answer:

Aquifers

Explanation:

There are 75 grams in 2.5 moles of dicarbon hexahydride (C₂H₆).

The given parameters;

The molecular mass of dicarbon hexahydride is calculated as follows;

Mw = C₂H₆ = (2 x 12) + (6 x 1)

Mw =30 g/mol

The mass of the dicarbon hexahydride in the given number of moles is calculated as follows;

mass = n x Mw

mass = 2.5 x 30

mass = 75 g

Thus, we can conclude that there are 75 grams in 2.5 moles of dicarbon hexahydride (C₂H₆).

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oh its a Chlorine isn't it....

it's electronic configuration is

2,8,7

so to make it 8 in its outermost shell it should gain 1 electron...

Answer:

1 colonists

2 England

3 slaves

4 the House of Burgesses

Answer:

:)

Explanation:

Answer:

Ag and o

Explanation:

because they are not metals but not metals

Answer:

I believe your answer is B.) I hope this helps.

Answer:

unsafe, solar

Explanation:

A lunar eclipse covers the moon which is safe to look at. New Moon, again is simply the moon. However, we should never look at the sun, eclipsed or not!

Answer:

C, it is unsafe to view solar

without eye protection

Answer:

hrjfnd

Explanation:

hfhdhfujduejdjdjdbfudbdjdbdifhdudjdufb

Answer:

48g of Magnesium.

Explanation:

We know that:

Mole=given mass/molar mass

Then, moles of aluminum = 54/27 = 2.

A/c to question ,

For 2 moles of magnesium it's mass is 2×24=48g.

Hence, the required mass for same number of magnesium atoms is 48g.

(Hope this helps can I pls have brainlist (crown)☺️)

Answer:

A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.

Answer:

A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.

Explanation:

Hope I helped!

El fragmento es un ejemplo de metáfora porque presenta la relación entre la idea de los ojos de Platero con el clima soleado y lluvioso.

Metáfora es un término de origen griego que se refiere a la acción de traslación. En el lenguaje, una metáfora es una figura retórica que consiste en la asignación de un concepto o expresión a una idea sin que esta se relaciones directamente con esta definición.

De acuerdo a lo anterior, en el fragmento se presenta una metáfora en la que se relacionan los ojos de Platero con las horas de sol y lluvia.

Nota: Esta pregunta está incompleta porque el fragmento está incompleta. Aquí está el fragmento completo.

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The molar mass of hydrogen gas H₂ is 2.016 grams.

The mass of a substance divided by its concentration, expressed in grams per mole (g/mol), is known as its molar mass.

Mass is the quantity of matter in a physical body. The product of the molar mass of the compound and the moles of the substance are defined as mass.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

M = m /n

M = molar mass

m = mass of a substance (in grams)

n = number of moles of a substance

The mass of hydrogen is 1

The number of moles of hydrogen is 6.022 x 10²³

Hydrogen gas has a molar mass of 2.016 grams per mole. When two hydrogen atoms join forces to create a molecule with the formula H2, hydrogen gas is created.

Therefore, the molar mass of hydrogen gas H₂ is 2.016 grams

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Answer:

Biodiversity is important to the stability of food webs because it increases the complexity of interactions between organisms and makes them better :')

Answer:

lll and ll

Explanation:

Answer: Ovalbumin (Albumin)

Explanation:

The albumen (egg white) is composed of almost 60% of the protein ovalbumin. It's the main source of proteins for tissue synthesis in the embryo. It acts as a storage protein, storing ions and amino acids necessary for embryonic development.

There are four different proteins present in egg white. In which the most abundant protein is ovalbumin present in 54 %.  

Proteins are biomolecules very essential for life. Proteins are made of a number of amino acids.  Amino acids join together to form peptides and large number of peptides constitute a protein.

Essential amino acids have to be up taken from diet and non-essential will be produced inside the body.

Proteins are the major substances to build up our body. There are essential and non essential amino acids. Nails and hair are made of keratin protein. Milk contains the protein called lactine.

Similarly the protein in curd is casein. The proteins in egg white are ovalbumin, ovotransferrin, ovomucin and ovomucoid. In which ovalbumin is most abundant.

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Answer:

Protons Neutron Electrons

hydrogen-1 1 0 1

hydrogen-2 1 1 1

hydrogen-3 1 2 1

Explanation:

hydrogen-1, hydrogen-2, and hydrogen-3 are all isotopes.

Isotopes have the same number of protons but a varying number of neutrons. Protons = Electrons.

Answer:

I would go with the first option. It shows how people having been releasing more and more carbon dioxide into the atmosphere.

Explanation:

Answer:

im going to go with letter c

Explanation:

Answer:

Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.

Explanation:

Physical change is a change in which there is no change in the chemical arrangement and thus there is no redistribution of atoms. No new substances are formed. There is only change in size, shape and phase etc.

[tex]H_2O(l)[/tex]→[tex]H_2O(g)[/tex]

Chemical change is a change in which there is change in the chemical arrangement and thus there is  redistribution of atoms. which leads to formation of new substances.

[tex]2Na+Cl_2[/tex]→[tex]2NaCl[/tex]

Answer:

solids

Explanation:

because in ice for instance the molecules and atoms are shivering so the move fast to stay warm

Explanation:

Though both the molecules contain carbon and oxygen, the general difference between them lies in their number of oxygen of atoms carried by them; as carbon dioxide (CO2) has one carbon atom and two oxygen atoms, while carbon monoxide (CO) has one carbon and one oxygen atom.

Carbon Dioxide is naturally present in our atmosphere and as it is excreted out during the process breathing by the animals and humans. On the other hand, Carbon Monoxide is toxic, and it produces suffocation if it builds while incomplete combustion of coal, fossil fuels, etc.

In the layman language, both the terms are sometimes used interchangeably and create confusion. As they have few similarities and incorporates carbon and oxygen as well, and are the byproducts of the things which carry carbon like fuels, coals, woods, and natural gas.

We all are aware of the three states of matter, which are Solid, Liquid and Gas. In this context, we will be discussing the two most common gases present in our atmosphere, how they vary from each other, their effects and their similarities. These gases are Carbon Dioxide and Carbon Monoxide.

Answer:

The major similarities between molecules of carbon monoxide, diatomic oxygen and carbon dioxide is that they all exist in gaseous states in their natural forms. Each of them also have low molecular weight of less than 70g/mol.

The difference between them is that the carbon monoxide is formed from incomplete combustion and is a toxic gas while carbon dioxide is an end product of respiration and is used by plants for photosynthesis. Oxygen on the other hand is essential for respiration and is the end product of photosynthesis.

Carbon dioxide and Carbon monoxide look most alike as they have the same elements which include Carbon and Oxygen but only different in the number of atom composition

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The answer option which are products of combustion is: D. Heat and light.

In Chemistry, there are five (5) main types of chemical reaction and these include;

A combustion reaction can be defined as an exothermic chemical reaction between physical substances, usually in the presence of oxygen and hydrocarbons to produce heat, light and carbon.

An example of a combustion reaction is the burning of forest trees and plants.

In conclusion, the products of combustion are heat and light.

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Answer:

heat and light

Explanation:

Answer:

Mass, volume, width, height, etc.

Explanation:

Extensive properties depend on the amount of material where intensive properties (color, luster, taste, odor, density, temperature, melting/boiling point) don't.

Explanation:

The nomenclature of ionic compounds is given by:

1. Positive is written first.  And if the metal atom has various oxidation states then its oxidation state is to be mentioned in brackets with help of roman numbers

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

1.)  : Calcium chloride  (Correct)

In the given compound, calcium has oxidation state of +2 and chlorine has oxidation state of -1.The name is correct.

2.)  : Copper (II) oxide   (Incorrect)

In the given compound,copper has the oxidation state of +1 and oxygen has oxidation state of -2.So ,the correct name will be Copper (I) oxide.

3.)  : Lead (II) sulfide   (Incorrect)

In the given compound, lead has the oxidation state of +4 and sulfur has oxidation state of -2. So ,the correct name will be Lead (IV) sulfide.