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3 years ago

Question 10 (1 point)

1 answer:

4 0

The empirical formula gives the relative ratio of atoms in each element. Therefore, it simplifies the whole numbers. For example C2H6 can be reduced to CH3 because they share the greatest common factor (2). The answer to this question would be #1. C4H10 can be reduced to C2H5 because 4 and 10 are both divisible by 2. C2H5 can not be reduced any further. All of the other options do not have a greatest common factor making them a empirical formula.

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A 1.26-g sample of an alkaline earth metal chloride is treated with excess silver nitrate. All of the chloride is recovered as 3

erastova [34]

Answer:

The metal is calcium (to form CaCl2)

Explanation:

Step 1: Data given

Mass of sample of an alkaline earth metal chloride = 1.26 grams

Silvernitrate (AgNO3) = in excess

All of the chloride is recovered as 3.26 g of silver chloride.

Step 2: The equation

XCl2 + 2AgNO3 → X(NO3)2+ 2 AgCl

Step 3: Calculate moles AgCl

Moles AgCl = mass AgCl / molar mass AgCl

Moles AgCl = 3.26 grams / 143.32 g/mol

Moles AgCl = 0.0227 moles

Step 4: Calculate moles XCl2

For 1 mol XCl2 we'll have 2 moles AgCl

For 2*0.0227 moles we need 0.0227/2 = 0.01135 moles

Step 5: Calculate molar mass XCl2

Molar mass XCl2 = mass / moles XCl2

Molar mass XCl2 = 1.26 grams / 0.01135 moles

Molar mass XCl2 = 111 g/mol

Step 6: Calculate of metal X

Molar mass X = molar mass XCl2 - molar mass Cl2

Molar mass X = 111 - 70.9 = 40.1 g/mol

The metal is calcium (to form CaCl2)

5 0

4 years ago

Strontium metal reacts with aluminum chlorate to produce strontium

Fudgin [204]

Answer: single replacement reaction, $3Sr+2Al(ClO_3)_3\rightarrow 3Sr(ClO_3)_2+2Al$

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.

A general single displacement reaction can be represented as :

$XY+Z\rightarrow XZ+Y$

As strontium metal is added to aluminum chlorate , strontium being more reactive than aluminium, displaces aluminium atom its salt solution and lead to formation of strontium chlorate and aluminum metal.

$3Sr+2Al(ClO_3)_3\rightarrow 3Sr(ClO_3)_2+2Al$

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3 years ago

Describe a time in the group discussion when someone cited evidence from their research to make a point.

IrinaVladis [17]

Answer:

During the debate, a colleague on the negative side argued that bullies do not pick on students based on clothing. Uniforms won’t protect students from bullying because clothing isn’t the only thing that bullies look at. Bullies may look at skin color or even the culture of a particular student.

Explanation:

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3 years ago

Use the following equation to determine the charge on iron when it dissociates from oxygen and determine whether it is being oxi

kumpel [21]

The correct answer is A. Brainliest would be much appreciated.

8 0

3 years ago

Calculate the molar mass of a compound if 0.372 mole of it has a mass of 152g

Snowcat [4.5K]

Answer:

409 g/mol

Explanation:

you divide the mass by the moles to get the molar mass

5 0

3 years ago