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harina [27]
2 years ago
8

Consider the equation below. Na+ + Cl– Right arrow. NaCl Which statement best describes the relationship between the substances

in the equation? The number of sodium ions is equal to the number of formula units of salt. The number of sodium ions is less than the number of chloride ions. The number of chloride ions is less than the number of formula units of salt. The number of sodium ions is two times the number of formula units of salt.
Chemistry
1 answer:
Naddik [55]2 years ago
3 0

Answer:

a)  The number of sodium ions is equal to the number of formula units of salt.

Explanation:

In the given reaction of NaCl

i.e. Na+ + Cl-  →NaCl.

Number of sodium ions = Number of chloride ions = number of  formula units of salt. Hence, the only correct option among all is, the number of sodium ions is equal to the number of formula units of salt. Rest all options are incorrect.

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Aluminum–lithium (Al–Li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of
gtnhenbr [62]

Answer:

The concentration of Li (in wt%) is 3,47g/mol

Explanation:

To obtain the 2,42g/cm³ of density:

2,42g/cm³ = 2,71g/cm³X + 0,534g/cm³Y <em>(1)</em>

<em>Where X is molar fraction of Al and Y is molar fraction of Li.</em>

X + Y = 1 <em>(2)</em>

Replacing (2) in (1):

Y = 0,13

Thus, X = 0,87

The weight of Al and Li is:

0,87*26,98g/mol = 23,4726 g of aluminium

0,13*6,941g/mol = 0,84383 g of lithium

The concentration of Li (in wt%) is:

0,84383g/(0,84383g+23,4726g) ×100= <em>3,47%</em>

6 0
2 years ago
The mechanism for the reaction described by 2N2O5(g) ---&gt; 4NO2(g) + O2(g) is suggested to be (1) N2O5(g) (k1)---&gt;(K-1) NO2
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5 0
2 years ago
What is the value of Keq for the reaction expressed in scientific notation? 2.1 x 10-2 2.1 x 102 1.2 x 103 1.2 x 10-3
Lady_Fox [76]

Complete question:

Consider the reaction.

At equilibrium at 600 K, the concentrations are as follows.

2HF -----> H₂ + F₂

[HF] = 5.82 x 10-2 M

[H2] = 8.4 x 10-3 M

[F2] = 8.4 x 10-3 M

What is the value of Keq for the reaction expressed in scientific notation?

2.1 x 10-2

2.1 x 102

1.2 x 103

1.2 x 10-3

Answer:

2.1 × 10^-2

Explanation:

Kequilibrum(Keq) = product/reactant

Equation for the reaction :

2HF -----> H₂ + F₂

Therefore,

Keq = [H2][F2] / [HF]^2

Keq = [8.4 x 10-3][8.4 x 10-3] / [5.82 x 10-2]^2

Keq = [70.56 × 10^(-3 + - 3)]/[33.8724 × 10^(-2×2)]

Keq = [70.56 × 10^-6] / [33.8724 × 10^-4]

Keq = 2.0665 × 10^(-6 - (-4))

Keq = 2.0665 × 10^(-6 + 4)

Keq = 2.1 × 10^-2

7 0
2 years ago
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How many possible stereoisomers are there of propylene glycol, an organic compound found in clearasil acne cream, caladryl, colg
vova2212 [387]

Answer:

2

Explanation:

Isomers are molecules with the same molecular formula, but with some difference. If that difference is in the manner the atoms are distributed in the molecule, they are called structural isomers; if the difference is the way the molecule is in space, they're called space isomers (cis/trans); and there are the stereoisomers, which the molecules are images that can be overlapping.

The stereoisomers have the property to deviate the polarized light, and, when a molecule has a chiral carbon, it means that it has stereoisomers. The number of stereoisomers is 2ⁿ, where n is the number of chiral carbons.

Chiral carbon is a carbon that bonds with four different structures. So, below is represented the molecule of propylene glycol, and it has only one chiral carbon (see the blue arrow), so, it has only 2 stereoisomers.

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2 years ago
Some household cleaners come in concentrations stronger than necessary for basic cleaning jobs. Jeremy followed the instructions
VashaNatasha [74]

Answer:

no he just repeated the steps and made more of the same cleaner my guy

Explanation:

5 0
2 years ago
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