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Dominik [7]
3 years ago
10

The ion with 36 electrons, 34 protons, and 44 neutrons

Chemistry
1 answer:
Reil [10]3 years ago
7 0
While the number nuclear protons as given is 34, and therefore we deal with the element selenium, there are 2 more electrons than protons, and therefore this species has an overall
2
−
charge.
We represent this selenide ion as
S
e
2
−
. Do I win 5 pounds?

Z= 34, therefore the atom is selenium
You might be interested in
1kg of sodium per oxide will produce what quantity of oxygen in STP
DENIUS [597]

287.2L

Explanation:

Given parameters:

Mass of sodium peroxide = 1000g = 1kg

Unknown

volume of oxygen produced at STP

Solution:

At standard temperatue and pressure STP;

     Number of moles = \frac{mass }{molar mass}

molar mass of Na₂O₂ = (2 x 23) + (2 x 16 ) = 78g/mol

   Number of moles = \frac{1000}{78} = 12.82mole

To solve this problem, we need to write the equation of the reaction since this is a decomposition reaction;

     Na₂O₂  →  2Na  +  O₂

The unknown is the volume of oxygen that would be produced at STP

  Volume of gas at STP = number of moles x 22.4

From the equation;

   1 mole of   Na₂O₂ produced 1 mole of  O₂ gas

  12.82mole will produce 12.82mole of oxygen gas

   

Now, the volume of gas at STP = 12.82 x 22.4 = 287.2L

learn more:

Volume of gas at STP brainly.com/question/12684384

#learnwithBrainly

5 0
3 years ago
Calculate the volume of helium gas sample that has a mass of 1.2 g at room conditions
Diano4ka-milaya [45]
1.2over2=0.6 as molarity then we know that molar volume=22.4dm3
molarity=volume per molar volume
therefore volume=molarity ×molar volume= 0.6 x 22.4= 13.44
3 0
4 years ago
Study the image
balandron [24]

Answer:

A

Explanation:

Just Because

6 0
4 years ago
Read 2 more answers
Draw the structural formula for both of these alcohols:
Inga [223]

Answer:

Check the image above

explanation:

When naming organic compounds based on IUPAC; we take note of functional group, position of functional group.

In 2,3,4-trimethyl-3-heptanol, the functional group is hydroxyl group ( OH ). It is on position 3 (2,3,4-trimethyl<u>-</u><u>3</u><u>-</u>heptanol. Then we put it on the third carbon. Another functional group is methyl group, with three positions, 2, 3, and 4.

In 4-ethyl-4-octanol, the functional group is hydroxyl group ( OH ) which is in position 4 on the fourth carbon. Another functional group is ethyl group in position 4 on the fourth carbon. In this case, the functional groups that have same position, are put on that same carbon.

6 0
3 years ago
How many milliliters of a 0.80 M sucrose solution contain each of the following number of grams? The molar mass of sucrose (C12H
OlgaM077 [116]

 The  number of Ml  of 0.80 M sucrose solution  that contain

(A) 7.45 g are  27.25 Ml


 <u>calculation</u>

volume= moles /molarity

molarity = 0.80 M which is the same as  0.80 mol/l

moles=  mass/molar mass

=  7.45 g/ 342.3 g/mol =0.0218 moles

volume is therefore  = 0.0218 moles / 0.80 mol/L=0.02725 L

convert into ml  by multiplying  by 1000

= 27.25  ml


<h3>   <u> question b</u></h3>

volume  = moles/molarity

molarity =  0.80 M = 0.80 Mol/L

moles =mass/molar mass

mass 17.0 mg convert into  g by diving  by 1000=0.017 g


moles is therefore  = 0.017 g/ 342.3 g/mol = 4.97 x10^-5 moles


volume =  (4.97 x 10^-5 moles)  /0.8  mol /l=6.21 x10^-5 L

= 6.21 x10^-5  x 1000 =0.0621 Ml




7 0
4 years ago
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