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Gennadij [26K]
3 years ago
9

Hello people ~

Chemistry
2 answers:
bixtya [17]3 years ago
7 0

Answer:

C. Teflon

Explanation:

Teflon is used for :-

  • It creates a non-stick surface which reduces ability of other substances to stick on it
  • Used in pipe fitting to prevent leaking of water
Alex_Xolod [135]3 years ago
4 0

Answer:

Teflon

Explanation:

  • Teflon is a very good polymer
  • It is known for its nonstick behavior .
  • So it's used in cookwares to cook food and in irons also
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Write the balanced equation for the reaction that occurs when methanol, CH3OH (I) is burned in air. What is the coefficient of m
IRISSAK [1]

Answer:

(C) 2

Explanation:

Methanol is an organic compound which burns with oxygen to produce carbon dioxide and water.

2CH_3OH_{(l)}+3O_2_{(g)}\rightarrow 2CO_2_{(g)}+4H_2O_{(g)}

Multiply coefficients times subscripts for each element in the formula, We get that there are 2 number of atoms of the carbon, 8 number of atoms of the hydrogen, and 8 number of atoms of the oxygen on both sides of equation. Hence, it is balanced.

<u>The coefficient of methanol from the balanced reaction is 2.</u>

7 0
3 years ago
Rhodium, a metal used as a catalyst and in jewelry, currently sells for $1500. per troy ounce. If 6.022 x 10^23 rhodium atoms ha
USPshnik [31]

Answer:

2.19 \times 10^{-4} \mathrm{Rh}

Explanation:

Atomic mass of Nickel = 58.69 g/mol

Mass of 1 mole of nickel atom = 58.69 gm

Now, mass of 1 nickel atom = Gram atomic mass/Avogadro number

=\frac{58.69}{6.023\times10^{22}} =9.744\times10^{23} g/atom

Now, price of Rhodium =$1500 per troy ounce

Price of nickel in market  = 0.577$/oz

No. of rhodium atoms needed to buy 1 nickel atom is

9.744 \times 10^{-23} \mathrm{g} \times \frac{1 \mathrm{oz}}{31.1035 \mathrm{g}} \times \frac{0.577 \mathrm{s}}{1 \mathrm{oz}} \times \frac{1 \mathrm{oz}}{1500 \mathrm{s}}

\quad \times \frac{31.1035 \mathrm{g}}{1 \mathrm{oz}} \times \frac{6.023 \times 10^{23} \mathrm{Rh} \text { atoms }}{102.9 \mathrm{g}}=2.19 \times 10^{-4} \mathrm{Rh} \text { atoms }

4 0
3 years ago
Os etapas que devem sem compridas para obter separadamente os componentes (a as substâncias ) de uma mistura de água ,sal e arei
SashulF [63]

Answer:

The steps that must be long to obtain separately the components (to the substances) of a mixture of water, salt and sand, are respectively: A) filtration and siphoning B) decanting and siphoning C) simple filtration and distillation D) collection and decantation.

Simple filtration and Siphoning is the method. When an insoluble solid is present in a liquid. Filtration is the ideal method of separation,The sand is filtered by the filtered paper as water is allowed to pass through the filter paper into a beaker where the funnel which hold the filter paper emptied into.

Water molecules is Siphoned, pull by force of gravity through the sand, past  the filter paper to emerge as clean in the beaker below.

4 0
4 years ago
I.Molten Nacl conducts electricity due to the presence a
Brut [27]

Answer:

Hello! Your answer would be BELOW

Explanation:

So a molten salt powers electricity. Hence, molten sodium chloride conducts electricity due to the presence of free ions. So, the correct answer is option D.      Atoms of sodium and chloride.

Hope I helped! Hope you make an 100%

-Amelia♥

6 0
3 years ago
What is the formula,molecular geometry,and bonding angle for ch2ci​
stellarik [79]

Answer:

what

Explanation:

6 0
3 years ago
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