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3 years ago

What are the 3 acid theories

Chemistry

1 answer:

BaLLatris [955]3 years ago

6 0

The Arrhenius Theory

The Brönsted-Lowry Theory

The Lewis Theory

(let me know if needed explanation)

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The mineral vanadinite has the formula pb5(vo4)3cl. what mass percent of chlorine does it contain?

lubasha [3.4K]

The molar mass of vanadinite is 1416.27 g/mol. Looking at the molecular formula we can see that there is 1 mole of Cl for every mole of vanadinite. Therefore:

mass percent = [(1 mole Cl * 35.45 g/mol) / (1 mole Pb5(VO4)3Cl * 1416.27 g/mol)] * 100%

<span>mass percent = 2.50%</span>

5 0

3 years ago

What is this?(−2h+9)(9h−2)=

OLga [1]

The answer you're looking for is "-18h^2 + 85h - 18".

This can be found by distributing "9h" into "(-2h + 9). This should give you "-18h^2 + 81h". Then youd distribute "-2" into the same parenthesis, which will give you "4h - 18".

Together, you would have "-18h^2 + 81h + 4h - 18". Combine like terms (81h and 4h), and you'll get the answer of "-18h^2 + 85h - 18".

I hope this helps!!

5 0

3 years ago

A compound formed from a metal and a non-metal will have which type of bond?

vekshin1

it's an ionic bond

btw i love your profile picture never understand is one of my favorites

6 0

3 years ago

Read 2 more answers

An unknown substance:- has a melting point of 1127 C,- is soluble in water,- does not conduct heat as a solid, andis hard.Given

Nat2105 [25]

Answer:

The unknown substance is CoF2

Explanation:

Diamond is insoluble in water. It does not conduct electricity. Every atom in a diamond is bonded to its neighbours by four strong covalent bonds, leaving no free electrons and no ions .

Most diamonds are extremely efficient thermal conductors, but electrical insulators. Diamond conducts heat well as a result of the strong covalent bonds between carbon atoms in a diamond crystal.

The melting point of diamond is about 4027 °C.

Since the melting point of diamond is way higher, it's not soluble in water and diamond does conduct heat. The unknown substance is not diamond.

SF6 is slightly soluble in water.

SF6 is not hard but it's a gas.

The melting point of SF6 is about -64 °C

Since SF6 is a gas and not a solid and has a melting point way lower than the unknown substance; the unknown substance is not SF6

Aluminum is an excellent heat and electricity conducto

The melting point of Al is 660 °C

Since Al has a lower melting point and is a good heat conductor; the unknown substance is not aluminium.

CoF2 is sparingly soluble in water.

CoF2 has a melting point between 1100 °C and 1200 °C

CoF2 is a solid but a bad heat conductor

⇒ The unknown substance is CoF2

3 0

3 years ago

To determine the concentration of citric acid, you will need to titrate this solution with 0.100 M NaOH. You are given a 1.00 M

BaLLatris [955]

Answer:

60.0mL of the diluted solution are needed

6.00mL of the 1.00M NaOH stock solution is the minimum volume needed to prepare the diluted solution.

Explanation:

As in each titration we need to use 20.0mL of the diluted 0.100M solution. As there are 3 titration, the volume must be:

3 * 20.0mL = 60.0mL of the diluted solution are needed

Now, to prepare a 0.100M NaOH solution from a 1.00M NaOH stock solution the dilution must be of:

1.00M / 0.100M = 10 times must be diluted the solution.

As we need at least 60.0mL, the minimum volume of the stock solution must be:

60.0mL / 10 times =

<h3>6.00mL of the 1.00M NaOH stock solution is the minimum volume needed to prepare the diluted solution.</h3>

8 0

3 years ago