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10 months ago

How many of each element would you find in AI(NO3)3?

Chemistry

1 answer:

Leno4ka [110]10 months ago

7 0

Answer:

you will find 3 in aluminium

hydrogen should be b 3

and oxygen is 9

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Enter the appropriate symbol for an isotope of calcium-42 corresponding to the isotope notation AZX.

Vikki [24]

Answer is ₂₀⁴²Ca.

In AZX notation
A - Represents the mass number of atom.
Mass number = number of protons + number of neutrons.
 It is shown at the above of the left side of the atom.
 Here it is 42.

 Z - Represents the atomic number.
Atomic number = number of protons.
It is shown at the bottom line of the left side of the atom.
Here it is 20.

X - Represents the symbol of the atom.
 Here X is Ca.

5 0

3 years ago

Read 2 more answers

What would happen to the results if the plastic wrap was dirty in a water filtration experiment?

weeeeeb [17]

Answer:

The plastic wrap of the covered cup acts like the atmosphere, and traps the water vapor. In a real cloud, the water vapor cools back into liquid water. In the covered cup, the air can only hold so much vapor, and the vapor condenses back to liquid water forming a “rain cloud” on the plastic wrap.

Explanation:

4 0

3 years ago

What is the law of multiple proportions

dmitriy555 [2]

When two element combine to form more than one compound i hope this helps you with work have a nice day :)

7 0

3 years ago

The pH of a solution is measured eight times by one operator using the same instrument. She obtains the following data: 7.15, 7.

sergiy2304 [10]

Answer:

7.186

Explanation:

The mean is the average of some given data from a sample point.

To calculate the mean, we use the formula below:

Mean = ∑fx/∑f

Where f = frequency

x = sample data

From the given pH of the solutions, we can form a table:

x f fx

7.15 1 7.15

7.16 1 7.16

7.18 1 7.18

7.19 1 7.19

7.20 3 21.6

7.21 1 7.21

Now ∑fx = 7.15 +7.16 +7.18 + 7.19 + 7.20 + 7.21 = 57.49

∑f = 1 + 1 + 1 + 1 + 3 + 1 = 8

The mean = $\frac{57.49}{8}$ = 7.18625 = 7.186

3 0

2 years ago

6 Fe2+ (aq) + Cr2O72− (aq) + 14 H+ (aq) → 6 Fe3+ (aq) + 2 Cr3+ (aq) + 7 H2O (aq) If the titration of 23 mL of an iron(II) soluti

ratelena [41]

Answer:

1.047 M

Explanation:

The given reaction:

$6Fe^{2+}_{(aq)}+Cr_2O_7^{2-}_{(aq)}+14H^+_{(aq)}\rightarrow 6Fe^{3+}_{(aq)}+2Cr^{3+}_{(aq)}+7H_2O_{(aq)}$

For dichromate :

Molarity = 0.254 M

Volume = 15.8 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 15.8 ×10⁻³ L

Thus, moles of dichromate :

$Moles=0.254 \times {15.8\times 10^{-3}}\ moles$

Moles of dichromate = 0.0040132 moles

1 mole of dichromate react with 6 moles of iron(II) solution

Thus,

0.0040132 moles of dichromate react with 6 × 0.0040132 moles of iron(II) solution

Moles of iron(II) solution = 0.02408 moles

Volume = 23 mL = 0.023 L

Considering:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Molarity = 0.02408 / 0.023 = 1.047 M

7 0

2 years ago