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2 years ago

What is the electron configuration of rubidium?

Chemistry

1 answer:

Alla [95]2 years ago

5 0

do you know cause i dont im just tryna get points here

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A 0.2121g sample of an organic compound was burned in a stream of oxygen and the carbon dioxide produced was collected in a stre

pav-90 [236]

Answer:

The answer to your question is: 17.26% of carbon

Explanation:

Data

CxHy = 0.2121 g

BaCO₃ = 0.6006 g

Molecular mass BaCO₃ = 137 + 12 + 48 = 197 g

Reaction

CO₂ + Ba(OH)₂ ⇒ BaCO₃ + H₂O

Process

1.- Find the amount of carbon in BaCO₃

197 g of BaCO₃ --------------- 12 g of Carbon

0.6006 g ---------------- x

x = (0.6006 x 12) / 197

x = 0.0366 g of carbon

2.- Calculate the percentage of carbon in the organic compound

0.2121 g of organic compound --------------- 100%

0.0366g -------------- x

x = (0.0366 x 100) / 0.2121

x = 17.26%

4 0

2 years ago

What is the chemical formula for K and P?

SCORPION-xisa [38]

Answer:

potassium phosphorus H3KP ?

3 0

2 years ago

NEED ASAP!!! Sound energy travels by electromagnetic radiation. True False

xenn [34]

false

Explanation:

..................................................................

6 0

2 years ago

Describe an element and a compound. Compare and contrast their similarities and differences. Identify how elements are related t

Alenkasestr [34]

Answer:

» Similarities :

☑ They both react by chemical means, to produce either an element or compound as the end product of the chemical reaction.

• Take an example of Magnesium reacting with cold water:

${ \rm{Mg_{(s)} + 2H _{2} O _{(l)} → Mg(OH)_{2(aq)} + H_{2(g)}}}$

• If it reacts with steam:

${ \rm{Mg _{(s)} + H _{2} O_{(l)} → MgO_{(s)} + H_{2(g)}}}$

• [ Element: Magnesium and Compound: Water ]

They are both classified under atomic substances cause they are made up of microscopic molecules known as atoms.

☑ They are both formed up by microscopic substances known as atoms.

» Differences :

☑ Compounds generally have higher molecular masses than elements.

☑ Compounds are formed through bonding by elements while elements can naturally exist or formed by extraction, purification and concentration

4 0

1 year ago

Why does the sky appear orang or red at sunset and sunrise?

LUCKY_DIMON [66]

Answer:

Because the sun is low on the horizon, sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky. More atmosphere means more molecules to scatter the violet and blue light away from your eyes.

3 0

2 years ago