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3 years ago

1. What does the -ite or -ate ending in a polyatomic ion mean?

Chemistry

1 answer:

den301095 [7]3 years ago

3 0

Question 1 im pretty sure it is a. oxygen is in the formula.
question 2 is b. dinitrogen pentoxide

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If 65.5 ml of HCl stock solution is used to make 450 ml of a 0.675 M HCl dilution, what is the molarity of the stock solution ?

Talja [164]

Answer: The molarity of the stock solution is 4.64 M

Explanation:

To calculate the molarity of the diluted solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the stock solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted solution

We are given:

$M_1=?M\\V_1=65.5mL\\M_2=0.675M\\V_2=450mL$

Putting values in above equation, we get:

$M_1\times 65.5=0.675\times 450\\\\M_1=4.64M$

Hence, the molarity of the stock solution is 4.64 M

8 0

3 years ago

The substitution reaction of toluene with Br2 can, in principle, lead to the formation of three isomeric bromotoluene products.

GREYUIT [131]

Answer:

See explanation and image attached

Explanation:

Aromatic hydrocarbons undergo electrophillic substitution. Usually, substituted benzene is more or less reactive to electrophillic substitution compared to unsubstituted benzene.

Substituents on the benzene ring tend to direct the incoming electrophile during electrophillic substititution. The presence of the -CH3 group on toluene directs the incoming Br electrophile to the ortho/para position.

Where the incoming electrphile E is Bromine, we can see that in the ortho/ para product, the electron pushing -CH3 stabilizes the resonance structure formed and increases electron density at the ortho/para position via resonance compared to the meta product as we can see from the image attached. Hence, the ortho and para products predominate over meta products.

Image credit: Chemistry steps

6 0

3 years ago

How to balance the chemical equation H2 +N2

brilliants [131]

Answer:

N2 + 3H2 --> 2NH3

Explanation:

N =2 N = 1*2 =2

H = 2*3 =6 H = 3*2 = 6

7 0

3 years ago

(1-6) Which of the electron movements shown below (A, B, C, or D) will emit the highest energy light?

Lapatulllka [165]

Answer:

I would say D (not sure tho)

Explanation:

7 0

3 years ago

The number of molecules of nitrogen, n2, found in 500.0 g of nitrogen gas is?

8_murik_8 [283]

The molar mass of monotonic Nitrogen is 14 g/mol. Since this is diatomic Nitrogen, double that to 28 g/mol.
Next, divide total mass by molar mass, 500 g / 28 g/mol, which gives 17.8571 moles. A mole is defined as being 6.022*10^23 molecules, so multiply moles by molecules/mol (Avogadro's number), and we finally end up with something like 1.075 * 10^25, give or take a few billion particles.

5 0

3 years ago