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Virty [35]
3 years ago
5

Re-order each list in the table below, if necessary, so that the atoms or ions in it are listed in order of decreasing size.

Chemistry
1 answer:
Serjik [45]3 years ago
7 0

Answer: Na, S, Cl

Explanation:

Atomic size decreases as one moves from left to right on the periodic table with elements in the same period. This is as a result of the electrons increasing in the outer circle and thus being drawn to the protons in the nucleus which will lead to the outer shell area decreasing.

Sodium (Na) comes before Sulfur (S) which comes before Chlorine (S) so this is the decreasing order as they are all in the same period.

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what is the molarity of a solution formed by mixing 10.0 g og h2so4 with enough water to make 0.100 l solution
tamaranim1 [39]
H₂SO4:

m=10g
M=98g/mol

n = m / M

n = 10g / 98g/mol = 0,102mol
V=0,1L

Cm = n / V = 0,102mol / 0,1L = 1,02M
4 0
3 years ago
Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm.
Ket [755]

Answer:

4.85 x 10⁻¹⁹J

Explanation:

Given parameters:

Wavelength = 410.1nm

Unknown:

The energy of the violet light = ?

Solution:

The energy of a wave can be derived using the expression below;

    E = \frac{hc}{wavelength}

h is the planck's constant

c is the speed of light

  Insert the parameters and solve;

      E = \frac{6.62 x 10^{-34}  x 3 x 10^{8} }{410.1 x 10^{-9} }   = 4.85 x 10⁻¹⁹J

4 0
3 years ago
Who is the father of tillage​?
Katen [24]

Answer: Jethro Tull is the father of tillage and he wrote a book horse hoeing husbandry and coined the term weed and zero tillage.

Explanation:

6 0
3 years ago
Draw a Lewis structure for C2H3Cl . Include all hydrogen atoms and show all unshared electron pairs. None of the atoms bears a f
Korvikt [17]

Answer:

See attached picture.

Explanation:

Hello!

In this case, since C2H3Cl is an organic compound we need a central C-C parent chain to which the three hydrogen atoms and one chlorine atom provides the electrons to get all the octets except for H as given on the statement.

In such a way, on the attached picture you can find the required Lewis dot structure without formal charges and with all the unshared electron pairs, considering there is a double bond binding the central carbon atoms in order to compete their octets.

Best regards!

5 0
3 years ago
10. Copper(i) bromide reacts with magnesium metal: 2 CuBr + Mg → 2 Cu + MgBrz
velikii [3]

Answer:

72.6 grams

Explanation:

I got this answer through stoichiometry.  For every 1 mole of Mg, 2 moles of CuBr are consumed.  Because of this, multiply the moles of Mg by 2.  Then, convert moles to grams.

5 0
3 years ago
Read 2 more answers
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