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3 years ago

Hey everyone I’m new here so so can you give me some tips about Brainly?

2 answers:

4 0

Answer:you just post a question and chose how many points fr the question which makes people want to answer it faster if you answer questions then you get points to be able to post questions

Explanation:i am not new to brainly

kvv77 [185]3 years ago

3 0

Answer:

Sure! Welcome to Brainly! You can earn points by answering question or giving people brainliest. In order to lose points you need to ask a question. They also have a tutoring feature where you can get live tutoring by someone. And you can also scan questions! That's about it, bye!

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What makes an element inert?

ozzi

"The inert gases are obtained by fractional distillation of air, with the exception of helium which is separated from a few natural gas sources rich in this element, through cryogenic distillation or membrane separation. For specialized applications, purified inert gas shall be produced by specialized generators on-site. They are often used by chemical tankers and product carriers (smaller not a big as well as the tendency of inert gases vesselshtop specialized generators are also available for laboratories."

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3 years ago

A partir de que materiales se obtienen los metales? en que se diferencian?

Anon25 [30]

Los metales son materiales que se obtienen a partir de minerales que forman parte de las rocas. Por ejemplo, el metal hierro se extrae de minerales de hierro como la magnetita o la siderita.

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3 years ago

Read 2 more answers

2. Consider the reaction 2 Cg H18 (4) +250â (9) âº 16 co, (g) + 18 HâO(g) la How many moles of H20co) are produced, when |--16:1

Sladkaya [172]

Answer :

(a) The moles of water produced are 145.35 moles.

(b) The mass of oxygen needed are 3080.8 grams.

Solution for part (a) : Given,

Moles of $C_8H_{18}$ = 16.15 moles

First we have to calculate the moles of $H_2O$

The balanced chemical reaction is,

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$

From the balanced reaction we conclude that

As, 2 moles of $C_8H_{18}$ react to give 18 moles of $H_2O$

So, 16.15 moles of $C_8H_{18}$ react to give $\frac{16.15}{2}\times 18=145.35$ moles of $H_2O$

The moles of water produced are 145.35 moles.

Solution for part (b) : Given,

Mass of $C_8H_{18}$ = 878 g

Molar mass of $C_8H_{18}$ = 114 g/mole

Molar mass of $O_2$ = 32 g/mole

First we have to calculate the moles of $C_8H_{18}$ .

$\text{ Moles of }C_8H_{18}=\frac{\text{ Mass of }C_8H_{18}}{\text{ Molar mass of }C_8H_{18}}=\frac{878g}{114g/mole}=7.702moles$

Now we have to calculate the moles of $O_2$

The balanced chemical reaction is,

$2C_8H_{18}+25O_2\rightarrow 16CO_2+18H_2O$

From the balanced reaction we conclude that

As, 2 moles of $C_8H_{18}$ react with 25 moles of $O_2$

So, 7.702 moles of $C_8H_{18}$ react with $\frac{7.702}{2}\times 25=96.275$ moles of $O_2$

Now we have to calculate the mass of $O_2$ .

$\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2$

$\text{ Mass of }O_2=(96.275moles)\times (32g/mole)=3080.8g$

The mass of oxygen needed are 3080.8 grams.

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3 years ago

Gasoline has a density of 0.65 g/ml. what is the mass in kilograms if the volume is 34 l

djverab [1.8K]

Does mass alone provide no information about the amount or size of a measured quantity? No, we need combine mass and volume into "one equation" to determine "density" provides more ... g/mL. An object has a mass of 75 grams and a volume of 25 cc. ... A certain object weighs 1.25 kg and has a density of 5.00 g/mL

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3 years ago

The big bang theory is one of the most accepted theories on the origin of the universe because of scientific evidence, such as _

mafiozo [28]

C left over heat from the explosion was found

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4 years ago