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the third one

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Answer:

itch come get meeeeee

Explanation:

itch come get meeeeee

Answer:

the answer is 2 hope this helps

Answer:

A. life forms existed during the Cambrian period

Explanation:

Answer:

A

Explanation:

Have a nice day!

Answer:

The properties of liquids are intermediate between those of gases and solids, but are more similar to solids. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds. For example, it requires 927 kJ to overcome the intramolecular forces and break both O–H bonds in 1 mol of water, but it takes only about 41 kJ to overcome the intermolecular attractions and convert 1 mol of liquid water to water vapor at 100°C. (Despite this seemingly low value, the intermolecular forces in liquid water are among the strongest such forces known!) Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds.

Explanation:

     im not sure this is what your looking for but i found this

Answer:

B

Explanation:

Because nuear changes release less negeyr than a chmeicsl and phsycial change

Answer:

121.11m/s²

Explanation:

Given parameters:

Force   = 525N

Mass = 4.5kg

Unknown:

Acceleration  = ?

Solution:

From Newton's second law of motion, we can find the solution to this problem. Using the expression below:

       F  =  m x a

F is the force

m is the mass

a is the acceleration

      So'

              525  = 4.5 x acceleration

            Acceleration = 121.11m/s²

Answer:

Explanation:

As

Molar mass of NaCl= 58.44 gm

So we got it that,

58.44 mass of NaCl contain = 6.023*10^23  molecules of Na Cl

x mass will contain = 6.78*10^50

by cross multiplication , we get

x=  58.44*(6.78*10^50)/  6.023*10^23  

x= 65.785 * 10^27  molecules

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Answer:

Copper metal will not react with sulfuric acid . ( Copper metal is too unreactive / it is " below hydrogen in the reactivity series " ). So use copper carbonate, it reacts easily to give copper sulfate ( and carbon dioxide and water ) .

Explanation:

i hope it's help you

Copper sulphate cannot be prepared by adding copper metal to dilute sulphuric acid because copper is below hydrogen in the reactivity series of metals.

Copper sulphate is an inorganic compound formed by the reaction of copper and sulphur.

Sulphuric acid is a strong acid that are made by the oxidizing solutions of sulphur dioxide.

Copper is below hydrogen in the reactivity series of metals, so it is unable to displace hydrogen from dil. sulphuric acid.

However, it reacts with conc. sulphuric acid to form copper sulphate.

Cu + conc. 2H2SO4  → CuSO4 + 2H2O + SO2

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Answer:

7.38654 in 54 grams

Explanation:

To get moles, you divide grams of a substance by molecular weight. The molecular weight of CO2 is 44 g/mol. 54g divided by 44/mol  is 1.227moles.

You then need to multiply moles by Avogadro’s constant (6.022x10^23). That gives you 7.38654x10^23 molecules in 54 grams of CO2.

The number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.  

• To find the number of molecules, first there is a need to find the number of moles in a substance.  

• Moles are determined by using the formula, mass of substances/molecular weight of the substance.  

• The molecular weight of CO2 is 44 gram per mole.  

• So, the number of moles will be,  

Number of moles = 54 g/44 g/mol = 1.227 moles

Now to determine the molecules, there is a need to multiply the moles with the Avogadro's constant, that is, 6.022 × 10²³. This comes out to be as,  

= 1.227 moles × 6.022 × 10²³  

= 7.39 × 10²³ molecules

Thus, the number of molecules in 54 grams of CO2 is 7.39 × 10²³ molecules.

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Answer:

Ch4 G +2o2 g co2 G +2h2o g How many moles of methane are required to produce 22 g co2 G after combustion

Explanation:

it's 22 grams..

hope the answer was helpful ....

Answer:

Volume in L = 0.028 L

Explanation:

Given data:

Mass of copper phosphate = 27.6 g

Molarity solution = 6.03 M

Volume of solution = ?

Solution:

First of all we will calculate the number of moles of copper phosphate.

Number of moles = mass/molar mass

Number of moles = 27.6 g/ 159.61 g/mol

Number of moles = 0.17 mol

Volume of solution:

Molarity = number of moles / volume in L

By putting values,

6.03 M = 0.17 mol / volume in L

Volume in L = 0.17 mol / 6.03 M

Volume in L = 0.028 L

Answer: B. 1 proton and 1 neutron(s)

Explanation: Founders Educere answer.

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Answer: Humans have increased the global temperature due to fossil fuel burning and are negatively contributing to the increase of CO2 emissions and greenhouse gases.

Explanation:

#1 Over the past century humans have negatively impacted the environment by increasing the global temperature due to fossil fuel emissions and a steady increase in the human population which has led to more resources being extracted and used.

#2 Human activities have brought a sudden increase in the global temperature recently due to the increase in greenhouse gas emissions from factories, automobiles, and homes. While we are beginning to use renewable resources, a large portion of our energy consumption still comes from the production and burning of fossil fuels.

#3 Some ways we can start to put a stop to global warming are by using renewable energy resources and decreasing the use of fossil fuel emissions. We can also decrease our carbon footprint by using electric powered vehicles and devices instead of petroleum burning automobiles and home appliances, and by riding bikes and walking over short distances.

Note: Please reword this a bit so you don't get in trouble for plagiarism.

Answer: cleaning up after the lab, D.

Explanation:

Answer:

Difference between Homogeneous mixture and Heterogeneous Mixture are as follows:

Answer:

red ,blue

Explanation:

because it has a greater temperature

wait i think I messed up nvm

Answer:

The plastic bottle represents the chest cavity, the straws act as the bronchi, the small balloons inside the plastic bottle serves as the lungs and the big balloon at the bottom of the plastic bottle is the diaphragm.

Explanation:

a. AgBr(s)⇒ Ag⁺(aq) + Br⁻(aq)

b.  Ksp AgBr = s²

c. 5 x 10⁻¹³  mol/L

Given

solubility AgBr = 7.07 x 10⁻⁷ mol/L

Required

The dissolution reaction

Ksp

The solubility product constant

Solution

a. dissolution reaction of AgBr

AgBr(s)⇒ Ag⁺(aq) + Br⁻(aq)

b. Ksp

Ksp AgBr  = [Ag⁺]  [Br⁻]

Ksp AgBr = (s) (s)

Ksp AgBr = s²

c. Ksp AgBr = (7.07 x 10⁻⁷)² = 5 x 10⁻¹³  mol/L

Answer:

The ink colors is Magneta, yellow, and black

Answer:

The number of valence electrons

Answer:

108- Hassium

11- sodium

56- Barium

92- uranium

25- manganese

103- lawrencium

10- neon

22- titanium

8- oxygen

14- silicon

32- germanium

39- yttrium

Answer:

C. Between 0 and 1 seconds

Explanation:

Since 0 - 1 seconds the car accelerates to 20mph. The rest each second the car accelerates 5mph.

Answer:

c

Explanation:

a p e x!

Answer:

Magnesium Mg act as anode

Explanation:

Because its reduction potential is much less than zinc

Answer: C. Mg(s)

Explanation:

Answer:

paired electrons is magnetic configuration