Please help fast. I will give brainliest!

Answer:

Single displacement (Substitution)

Explanation:

Answer:3.107

Explanation:

Answer:

C are transferred from atoms of calcium to atoms of oxygen to form Ca+2 and O-2 ion

Explanation:

Calcium is a meta and Oxygen is a non metal. The bond that forms between a metal and a non metal is an ionic bond. In an ionic bond, the metal loses electrons while the non metal gains the electrons; hence there is transfer of electrons.

Calcium belongs to group 2 and oxygen needs 2 more electrons to complete it's electronic configuration.

Calcium would lose two electrons to form Ca+2 and oxygen would gain two electrons to form O-2 ion

The correct option is;

C. are transferred from atoms of calcium to atoms of oxygen to form Ca+2 and O-2 ion

Answer:

It is neither a synthesis reaction nor a decomposition reaction because two reactants form two products.

Explanation:

This reaction would be considered a single replacement reaction.

The chemical reaction involves the products and the reactants. The image is neither synthesis nor decomposition as the two products are formed from two reactants. Thus, option A is correct.

A chemical reaction includes the chemical interaction between the reactants to yield the products. In a synthesis reaction, two reactants interact to produce a different molecule or compound.

In a decomposition reaction, a reactant undergoes splitting to produce products and energy. But in the image two reactants produces two products that neither of the reaction shows.

This type of reaction is seen as the single replacement reaction where the more reactive element displaces the less reactive from the compound to form the new molecule.

Therefore, option a. Maya's picture represents a single replacement reaction but not a synthesis or decomposition reaction.

Learn more about the chemical reactions here:

https://brainly.com/question/16099976

#SPJ2

Answer:

2)The particles in a liquid are moving past one another constantly.

3)The particles in gas move freely in all directions.

4)The particles in a solid vibrate in a fixed position.

6)The particles in a gas have few attractions between them.

7)The particles in all states of matter are always moving.

Explanation:

Answer:

The location of element tin is

Group 14, Period 5

Explanation:

Answer:

Explanation:

Use the dilution equation: M1V1 = M2V2

M1 = 6.0 M

V1 = 0.025 L

M2 = ?

V2 = 1.75 L

(6.0 M)(0.025 L) = M2(1.75 L)

Solve for M2 --> M2 = 0.086 M HCl

answer:

it is usually stored in large above-ground tanks or in underground caverns

good luck :)

hopefully, this helps

have a great day !!

**next time you should try goo-gling it, it'll save you the points :)**

Answer:

1

Explanation:

M r ( NaCl ) = A r ( Na ) +  A r ( Cl )  =  23 + 35,5  =  58,5

 So, 1 mol of NaCl has a mass of 58,5 g.

Moles of NaCl  =  58,5 g NaCl

times (x)

1 mol NaCl  = 58,5 g NaCl  =  1,00 mol NaCl

According to the mole concept, there are 0.140 moles in teaspoon of salt that contains 5 g.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.Number of moles is calculated as, mass/molar mass.

In this case number of moles is calculated as, 5/35.5=0.140 moles.

Thus, there are 0.140 moles in 5 g teaspoon of salt.

Learn more about mole,here:

https://brainly.com/question/21323029

#SPJ2

Answer:The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. ... There are two oxygen atoms in the reactants and two atoms of oxygen in the product.

Explanation:

Answer:

chemical energy to  kinetic energy

Explanation:

Answer:

A. Chemical energy to kinetic energy and gravitational potential

energy

Explanation:

Answer:

1 and 4

Explanation:

Answer:

2.4 grams of H

Explanation:

Zn+2HCl=ZnCl2+H2

85gHCl x 1 mol HCl/36.458 g HCl x 1 mol H/2 mol HCl x 2.016 g H/1 mol H = 2.4 g H. (I know this is kinda hard to read, but I had the same question for my test and this is what I did to get 2.4. I hoped this helped)

Answer:

glacial evidence found in South America

Answer: C. Glacial evidence

Answer:

answer below:

Explanation:

1) 4 Al + 3 O2 --> 2Al2O3.

2) Al mol= 28/27 = 1.037mol

O mol= 45/16 = 2.812mol

Al : O

4 : 2

x : 2.812

cross multiply

4 x 2.812/2  = 5.624 mol of Al

Al is limiting reactant

3) 28/5.246 = 5.34product can be formed (not that much sure)

4) 45/ 0.5185 = 86.79

86.79 - 5.34 = 81.45g

5) 50 / 81.45 x 100 = 61.39% ( i guess)

i hope this hleps you

Answer:

Explanation:

Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps. Of all the water on Earth, more than 99 percent of Earth's water is unusable by humans and many other living things!

Answer:

biodiversity

Explanation:

As rainforest is replaced with agricultural land, it is reasonable to predict a reduction in the biodiversity.

The rainforest supports a myriad of plants, animals, and microbial species which altogether constitute what is scientifically known as biological diversity or simply biodiversity.

When rainforest is removed for agricultural purpose, the variety of plants, animals, and microbes are removed along with it. Agricultural crops and the flora/fauna they support cannot be as diverse as the original rainforest layer that was been removed. Hence, a reduction in biodiversity becomes inevitable.

Answer:

Bb

Explanation:

Answer:

Volcanoes cool off the earth by emitting heat from its interior. They also add islands and for example, Hawaii was created / is made out of volcanoes. The deposits from volcanoes can also be used for building materials. Volcanic explosions have caused the atmosphere and oceans to form. Volcanic deposits also create land which is fertile.

Answer:

Climbing a ladder assumes that you would touch/use each step only once. Electrons will take one layer that is empty first, and previous layers or "steps" will continue being filled with additional electrons only when every other layer is occupied by, at least, one electron.

Explanation:

A good analogy is what passengers in a bus do. Everyone tries to sit alone first and only when every pair of seats has a person already seated, people will use them as well, sitting next to each other.

Answer:

C₆H₁₂O₆

Explanation:

Answer:

C

Explanation:

all of the fish, bacteria, and mammals that live in a lake

hope this helps!

Answer:

Explanation:

If observed through the year, the constellations shift gradually to the west. This is caused by Earth's orbit around our Sun. In the summer, viewers are looking in a different direction in space at night than they are during the winter.

Answer:

The charge on an atom with an equal number of protons and electrons is neutral. (option A.)

Answer:

A) Neutral

Explanation:

Answer:

1- gram of oxygen, 2- 3.01x1023 atoms of oxygen, 3- 1 molecule of oxygen, 4- 1mole of oxygen, 5- 1atom of oxygen.

Answer:

39.4 Liters

Explanation:

Using the general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

According to the information provided in this question;

P = 1.25atm

V = ?

T = 300K

n = 2.00mol

Using PV = nRT

V = nRT/P

V = (2 × 0.0821 × 300) ÷ 1.25

V = 49.26 ÷ 1.25

V = 39.41

V = 39.4 Liters

4 Na + O2 → 2 Na2O

I think that's it