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Sedaia [141]
3 years ago
12

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)?

Chemistry
2 answers:
Travka [436]3 years ago
7 0
That would be A.

2.5*2*10^(10-7)=5*10^3
Brut [27]3 years ago
4 0

Answer: The correct option is,

A. 5.0\times 10^3

Explanation:

Given expression,

(2.5\times 10^{10})\times (2.0\times 10^{-7})

=2.5\times 2.0\times 10^{10-7}

( By using product property of exponent i.e. a^m\times a^n = a^{m+n} )

=5.0\times 10^3

Therefore,

OPTION A is correct.

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Use IUPAC rules to name this compound. A) nitrogen iodide B) nitrogen triiodide C) mononitrogen iodide D) mononitrogen triiodide
Mariulka [41]

Answer:

Name of the compound is Nitrogen triiodide.

Explanation:

According to the IUPAC rules, to naming of the compound the following formula can be applied.

Prefix + Name of first element + Base name element of second element + Suffix.

The given compound - NI_{3}

Name of first element- Nitrogen

Base name element of second element - Iodine

Suffix = 3 = tri

Here, iodine is in ionic form therefore, it becomes iodide. and then suffix will be added in front of the halogen.

Therefore, name of the compound will be  Nitrogen triiodide..

3 0
3 years ago
Read 2 more answers
What is the limiting reactant when 5.6 moles of aluminum react with 6.2 moles of water?
alexira [117]

The limiting  reactant  when 5.6  moles   of aluminium react  with  6.2  moles   of water   is

      water( H2O)


      <u><em>Explanation</em></u>

The  balanced    equation is as below

2 Al +3 H2O  →  Al2O3  +3 H2

The mole ratio  of Al :Al2O3  is 2:1  therefore  the  moles  of  Al2O3

  = 5.6 x1/2  =  2.8  moles


The   mole  ratio  of H2O: Al2O3  is 3:1 therefore  the  moles  of Al2O3  produced

                 = 6.2  x1/3= 2.067  moles


since  H2O  yield  less  amount  of Al2O3 ,  H2O   is  the limiting reagent.

7 0
3 years ago
Read 2 more answers
Where are calcium ions (Ca2+) stored in the body?
ANTONII [103]
Calcium is stored in bones in the body

5 0
2 years ago
Read 2 more answers
) Starting with 5.00 g barium chloride n hydrate yields 4.26 g of anhydrous barium chloride after heating. Determine the integer
RSB [31]

Answer:

2

Explanation:

Mass of water molecule = mass of hydrated salt - mass of anhydrous salt

Mass of water molecule = 5.00 - 4.26 = 0.74g of water molecule.

Number of moles = mass / molarmass

Molar mass of water = 18.015g/mol

No. of moles of water = 0.74 / 18.015 = 0.0411 moles.

Mass of BaCl2 present =?

1 mole of BaCl2 = 208.23 g

X mole of BaCl2 = 4.26 g

X = (4.26 * 1) / 208.23

X = 0.020

0.020 moles is present in 4.26g of BaCl2

Mole ratio between water and BaCl2 =

0.0411 / 0.020 = 2

Therefore 2 molecules of water is present the hydrated salt.

4 0
3 years ago
A dehydration reaction starting with 3.0 g cyclohexanol produces 1.9 g cyclohexene. Calculate the theoretical yield for this rea
Ilya [14]

Answer:

77%

Explanation:

First we <u>convert 3.0 g of cyclohexanol (C₆H₁₂O) to moles</u>, using its <em>molar mass</em>:

  • Molar mass of C₆H₁₂O = 100.158 g/mol
  • 3.0 g ÷ 100.158 g/mol = 0.030 mol

Then we <u>convert 1.9 g of cyclohexene (C₆H₁₀) to moles</u>, using its <em>molar mass</em>:

  • Molar mass of C₆H₁₀ = 82.143 g/mol
  • 1.9 g ÷ 82.143 g/mol = 0.023 mol

Finally we <u>calculate the theoretical yield</u>:

  • 0.023 mol / 0.030 mol * 100% = 77%
3 0
2 years ago
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