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4 years ago

Counting Atoms in Compound 1. 4K2CO3 K=_ C=_ O=___

2 answers:

8 0

K= 8
C=4
O= 12

The number after the letter shows how much of that atom there is.

The 4 shows there is 4 of each after it, so 4 of the K2, C, and O3. You would want to multiply the K2, C, and O3 by 4.

horsena [70]4 years ago

3 0

Answer:

K = 8, C = 1, O = 12

Explanation:

This question has to do with the atomicity of each atom in the compound. Atomicity is the total number of atoms that constitute a molecule.

In 4 moles of potassium carbonate (K₂CO₃), we have

K = 4 moles ₓ 2 atoms = 8 atoms

C = 4 moles ₓ 1 atom = 4 atoms

O = 4 moles ₓ 3 atoms = 12 atoms

NOTE: The "4" before the molecule signifies the number of moles (molecules) of K₂CO₃ which means it "affects" each of the atom that makes up the compound.

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¿Que hace diferente ala química de la alquimia?

viva [34]

Answer:

La distinción entre la química teóricamente teórica y la química avanzada es la química teórica teórica que se basa en un espiritualista, potente que percibe visualmente la autenticidad, mientras que la química espera que la autenticidad sea fundamentalmente mundana. Eso engendra una tremenda distinción, y la química nunca se hubiera alejado excepcionalmente de la remota posibilidad de que se hubiera quedado con el trascendentalismo antediluviano.

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3 years ago

A solution of NaOH has a concentration of 25.00% by mass. What mass of NaOH is present in 0.250 g of this solution? Use the peri

tekilochka [14]

Answer:

1) 0.0625 g.

2) 0.0125 g.

Explanation:

1) A solution of NaOH has a concentration of 25.00% by mass. What mass of NaOH is present in 0.250 g of this solution?

We can use the relation:

mass% of NaOH = [(mass of NaOH)/(mass of solution)] x 100.

mass% of NaOH = 25.0%, mass of NaOH = ??? g, mass of solution = 0.250 g.

∴ mass of NaOH = (mass% of NaOH)(mass of solution)/100 = (25.0%)(0.250 g)/100 = 0.0625 g.

2) What mass of NaOH must be added to the solution to increase the concentration to 30.00% by mass?

We can use the relation:

mass% of NaOH = [(mass of NaOH)/(mass of solution)] x 100.

mass% of NaOH = 30.0%, mass of NaOH = ??? g, mass of solution = 0.250 g.

∴ mass of NaOH = (mass% of NaOH)(mass of solution)/100 = (30.0%)(0.250 g)/100 = 0.075 g.

∴ The mass of NaOH should be added = 0.075 - 0.0625 = 0.0125 g.

9 0

4 years ago

Read 2 more answers

Convert 1.05 x 1026 molecules Ni to number of moles.

vodka [1.7K]

Answer:

1077.3 molecular in 1.05*1026 molecules

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3 years ago

What technology can make coal a cleaner fuel? fluidized-bed combustion building smoke stacks taller implementing a prewash of co

anastassius [24]

Answer : The technology that can make coal a cleaner fuel is to use lower quality of coal with high sulfur content.

Explanation : Using lower quality of coal with high amount of sulfur in it can make coal a cleaner fuel because of high amount of sulfur it will have better combustion.

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4 years ago

What is meant by the term chemical reaction

pantera1 [17]

Answer:

<h3> $\huge{ \underline{ \underline { \bold{ \sf{ \orange{See \: below}}}}}}$ </h3>

Explanation:

▪️ $\underline{ \bold{ \sf{ \blue{Chemical \: reaction}}}}$

⇒The composition , decomposition or displacement of molecules of matter during chemical change is called chemical reaction.

▪️ $\underline{ \bold{ \sf{ \purple{ \: Further \: more \: explanation}}}}$

Various conditions bring about these changes. The chemical reactions are represented by chemicalequation. The compounds or elements that take part in chemical reaction are called reactant. They are written at the left side of an arrow that represent a change while the compound or elements that formed after the chemical change are called product. They are written at the right side of the arrow.

▪️ $\underline{ \bold{ \sf{ \purple{For \: example}}}}$

When nitrogen reacts with hydrogen to form ammonia :

Nitrogen + Hydrogen ⇒ Ammonia

N₂ + 3H₂ ⇒ 2NH₃

Presentation of a chemical reaction in the form of equation is called chemical equation . Chemical equation may be word equations or formula equations.

Hope I helped!

Best regards!!

3 0

3 years ago

Counting Atoms in Compound 1. 4K2CO3 K=___ C=___ O=___

Counting Atoms in Compound 1. 4K2CO3 K=_ C=_ O=___