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Answer:

21.614 grams are found in [tex]6.5 \times 10^{22}[/tex] molecules of caffeine.

Explanation:

The chemical formula for caffeine is [tex]C_{8}H_{10}N_{4}O_{2}[/tex], the molar weight of caffeine is:

[tex]M = 8\cdot \left(12.011\,\frac{g}{mol} \right) + 16\cdot \left(1.008\,\frac{g}{mol} \right)+4\cdot \left(14.007\,\frac{g}{mol} \right)+2\cdot \left(15.999\,\frac{g}{mol} \right)[/tex]

[tex]M = 200.242\,\frac{g}{mol}[/tex]

According to Avogadro's Law, a mol of caffeine contains [tex]6.022\times 10^{23}[/tex] molecules. The number of grams contained in [tex]6.5 \times 10^{22}[/tex] molecules is determined by simple rule of three:

[tex]x = \frac{6.5\times 10^{22}\,molecules}{6.022\times 10^{23}\,molecules} \times 200.242\,g[/tex]

[tex]x = 21.614\,g[/tex]

21.614 grams are found in [tex]6.5 \times 10^{22}[/tex] molecules of caffeine.

Answer:

if its multiple, C and D, if not, C

Explanation:

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One organism was ancestor of the other organism and both organisms lived around the same time is the conclusion made by scientist.

Fossil scientist are the specialists in studying the ancient fossils of animals and plants.

If fossils of two different species of very similar organisms are found in different layers of rock then it might be the possibility that one organism was ancestor of the other or both organisms lived around the same time. Because it is not necessary that if two species had the same organism then they have same behavior.

Hence, option (c) & (d) is correct.

To know more about fossil scientist, visit the below link:

https://brainly.com/question/3379389

Answer:

What's the question?

Explanation:

Answer:

I dont understand, is there supposed to be a picture or question?

Explanation:

Answer: It will get higher

Explanation: it’ll get higher because the pressure will increase

Answer:

C.) 35

Explanation:

Answer:

35 is the correct answer (c)

Answer:

In the experiment performed involving the number of liquid drops that a penny can hold, 25 drops of substance X can fit in a penny while only 12 drops of substance Y can fit on another penny because, substance X is more viscous than substance Y. Thus, the intermolecular forces present in substance X are stronger than those present in substance Y.

Explanation:

Intermolecular forces (IMF) are the forces which exist between the neighboring molecules of a a substance. These forces, though weaker than intramolecular forces which acts between neighboring atoms, they still are responsible for several differences in the physical properties of substances with comparatively similar molecular masses.

The three major types of intermolecular forces are, hydrogen bonding, dipole–dipole interactions and  London dispersion forces.

The existence of intermolecular forces in molecules of substances results in increase in melting and boiling points, surface tension,  capillary action, viscosity, as well as surface area of substances,

Viscosity, which is the resistance to flow offered by a liquid increases with increase in the intermolecular forces between the molecules of a liquid.

In the experiment performed involving the number of liquid drops that a penny can hold, 25 drops of substance X can fit in a penny while only 12 drops of substance Y can fit on another penny because, substance X is more viscous than substance Y. Thus, the intermolecular forces present in substance X are stronger than those present in substance Y.

Answer:

Halogen

Explanation:

Answer:

non-Metals

Explanation:

Answer: 24

Explanation: multiply 12 with 2

Answer:

Sand is typically made mostly of varying amounts of material weathered from inland rocks and transported to the beach on the wind or in rivers, and/or shells and other hard parts precipitated out of the ocean water by marine organisms. Sand therefore records processes at a variety of timescales.

Explanation:

Answer:

titanium(III) oxide is the name of Ti2O3

Answer:

Acids are sour in taste while bases have bitter taste for example Soap

Acids turn Blue litmus to Red While Bases turn Red litmus to Blue

Acids are Corrosive in concentrated form while bases Are non corrosive except concentrated form of NaOH and KOH

Answer:

1 . acid

a) acid are proton donors / electrons pair acceptors .

b) it have pH value < 7.

c) acids taste sour .

2 . base alkali

a) bases are proton acceptors/ electron pair donors .

b) it have pH value < 7 .

c) bases taste soupy .

Explanation:

may it helps you ....

Answer:

B. CdSO4(aq) + K2S(aq) → CdS(s) + K2SO4(aq)

Explanation:

A precipitate reaction is when a solid forms, so in this case CdS is the precipitate.

Answer:

3 Shells

Explanation:

2 electrons in shell one, 8 in shell two and only 1 in shell three.

Answer:

3 shells

Explanation:

Answer:

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no se ingles solo spanish

Explanation:

todoooooooooooooooooooooo bien bro

Answer: B

Explanation:

B. Distance and Mass

Newton's Law of gravitation states [tex]F=\frac{GMm}{r^2}[/tex]

G being a constant

M being mass 1

m being mass 2

r being the distance between them from their center of mass

Answer:

The fan blade would turn faster

Explanation:

Answer:

All these are made up of polymers.

Answer:

2385.49 grams of cobalt.

Explanation:

1. Convert 40.48 moles of Co (cobalt) into grams (mass):

The molar mass of cobalt is 58.933195 g/mol.

[tex]40.48 mol Co = \frac{58.93 g/mol}{1 mol Co} = 2385.49 g[/tex]

Answer:

132g

Explanation:

CH4= 12+4=16  

moles= m/Mr    moles=48/16=3 mol

CO2= Mr=44

there are the same number of moles as methane:

Mass= Mrxmoles

44x3=132g

The mass of the carbon dioxide produced by the combustion of the 48 g of methane is equal to 132 g.

Combustion reaction involves the complete oxidation of the hydrocarbon such reactions generally release only carbon dioxide and water as products.

A hydrocarbon undergoes combustion to produce carbon dioxide and water as the product. No other side products are formed in the combustion reaction.

The given combustion reaction of the methane can be written as follows:

CH₄   + 2 O₂ →  CO₂  +  2H₂O

Given the amount of methane for combustion = 48 g

The molar mass of methane = 16g/mol

The molar mass of the carbon dioxide, CO₂ = 44g/mol

16 grams of methane produce carbon dioxide = 44g

The  48 grams of methane will produce CO₂ = (44/16) ×48 = 132 g

Therefore, the mass of 132 g of carbon dioxide is produced by the combustion of 48g of methane.

Learn more about combustion reactions, here:

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Answer:

Charge

Explanation:

A surplus (having "extra") or deficit (having "fewer") of electrons possessed by an object. A charge can cause attractive or repulsive forces which can be observed in some cases (e.g. pith balls, bits of plastic).

Answer:

metalloids aka semimetals

Explanation: