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3 years ago

Which is an example of radiation?

Chemistry

1 answer:

SpyIntel [72]3 years ago

4 0

Answer:

Number 3.

Explanation: The sun produces radiation in the car, which then becomes hot because much radiation is coming in, but little goes out.

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A 0.500-g sample containing Na2CO3 plus inert matter is analyzed by adding 50.0 mL of 0.100 M HCl, a slight excess, boiling to r

Yakvenalex [24]

The percentage by mass of Na2CO3 in the sample is 48%.

The equation of the reaction of Na2CO3 with HCl;

Na2CO3(aq) + 2HCl(aq) ------> 2NaCl(aq) + H2O(l) + CO2(g)

Since the HCl is in excess, the excess is back titrated with NaOH as follows;

NaOH (aq) + HCl(aq) ---->NaCl(aq) + H2O(l)

Number of moles of HCl added = 0.100 M × 50/1000 L = 0.005 moles

Number of moles of NaOH added = 5.6/1000 × 0.100 M = 0.00056 moles

Since the reaction of NaOH and NaOH is 1:1, 0.00056 moles of HCl reacted with excess HCl.

Amount of HCl that reacted with Na2CO3 = 0.005 moles - 0.00056 moles = 0.0044 moles

Now;

1 mole of Na2CO3 reacts with 2 moles of HCl

x moles of Na2CO3 reacts with 0.0044 moles of HCl

x = 1 mole × 0.0044 moles / 2 moles

x = 0.0022 moles

Mass of Na2CO3 reacted = 0.0022 moles × 106 g/mol = 0.24 g

Percentage of Na2CO3 in the sample = 0.24 g/ 0.500-g × 100/1 = 48%

Learn more about back titration: brainly.com/question/25485091

5 0

2 years ago

WHAT IS AN Ionic bond

lidiya [134]

${\orange { \mathbb{ \huge{QUESTION}}}}$

WHAT IS AN IONIC BOND

$\huge\boxed{\fcolorbox{red}{blue}{ ANSWER }}$

$\orange{\underline{\huge{\bold{\textit{\green{\bf{Ionic \:Bond}}}}}}}$

kossel explained that inert gases r inert due to the electronic configuration which contains 8 electrons in their outermost shell

And other elements loss and gain electrons to form ions and to have electronic configuration same as Noble gas and to get stable

$Hope\: it \:is\: helpful$

$Mark \:as\: the\: brainlist\: ans\: with \:thanks...$

#SARDAR JI.

6 0

3 years ago

Read 2 more answers

What are the masses of the four different BrClBrCl molecules? Express the masses in atomic mass units using six significant figu

Sliva [168]

Answer ; The question is missing in some details, but here are he details ;

The two naturally occurring isotopes of bromine are

81Br (80.916 amu, 49.31%) and

79Br (78.918 amu, 50.69%).

The two naturally occurring isotopes of chlorine are

37Cl (36.966 amu, 24.23%) and

35Cl (34.969 amu, 75.77%).

Bromine and chlorine combine to form bromine monochloride, BrCl.

Explanation:

The detaile calculation is as shown in the attachment.

6 0

3 years ago

(Brainliest) Please Help! Please do not give me a random, gibberish answer or I will report you and give you a low rating theref

nataly862011 [7]

Answer:

3.10g

Explanation:

Please see the attached picture for the full solution.

3 0

3 years ago

Sheela wants to make a computer model of a land ecosystem. Part of her model simulates the chemical processes of photosynthesis

shusha [124]

<span>The correct answer is A, the ligt-dependent reactions. These reactions are responsible for the production of glucose molecules, by the utilization of carbon dioxide, and water along with the sunlight. Glucose is then broken down during resiration process, for the production of ATP in mitochondria.</span><span />

5 0

3 years ago

Read 2 more answers