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4 years ago

What is the alcohol in this?

Chemistry

1 answer:

disa [49]4 years ago

6 0

I reckon it looks like a 40% two six

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Magnesium oxide decomposes into magnesium and oxygen. if 12.09 g of magnesium oxide decomposes to form 7.29 g of magnesium, what

Vlada [557]

the mass of oxy gas would be 4.03 did i calculate that right?

8 0

4 years ago

A cube has a mass of 42 grams and a volume of 15 cubic centimeters. What is it’s density?

deff fn [24]

Answer:

2.8g/cm³

Explanation:

Given parameters:

Mass of cube = 42g

Volume of cube = 15cm³

Unknown:

Density of the cube = ?

Solution:

Density is defined as the mass per unit volume of a substance. It is mathematically expressed as:

Density = $\frac{mass}{volume}$

So;

Density = $\frac{42}{15}$ = 2.8g/cm³

6 0

3 years ago

Solid cesium iodide has the same kind of crystal structure as CsCl which is pictured below: If the edge length of the unit cell

Assoli18 [71]

The question is incomplete, here is the complete question:

Solid cesium iodide has the same kind of crystal structure as CsCl which is pictured below: If the edge length of the unit cell is 456.2 pm, what is the density of CsI in $g/cm^3$

The image is attached below.

Answer: The density of CsI is $9.09g/cm^3$

Explanation:

To calculate the density of metal, we use the equation:

$\rho=\frac{Z\times M}{N_{A}\times a^{3}}$

where,

$\rho$ = density

Z = number of atom in unit cell = 2 (BCC)

M = atomic mass of CsI = 259.8 g/mol

$N_{A}$ = Avogadro's number = $6.022\times 10^{23}$

a = edge length of unit cell = $456.2pm=456.2\times 10^{-10}cm$ (Conversion factor: $1cm=10^{10}pm$ )

Putting values in above equation, we get:

$\rho=\frac{1\times 259.8}{6.022\times 10^{23}\times (456.2\times 10^{-10})^3}\\\\\rho=9.09g/cm^3$

Hence, the density of CsI is $9.09g/cm^3$

3 0

3 years ago

How do we know which elements are more reactive?

Natasha2012 [34]

For metals, reactivity increases down a group and from right to left across a period. Non metals, reactivitt increases up a grouo and from left to right across a period. Francium is the most reactive metal and fluorine is the most reactive non-metal.

5 0

3 years ago

a certain skin lotion is a fine mixture of water and various oils. this lotion is cloudy and cannot be separated into oil and wa

AURORKA [14]

The answer is solution because it cannot be separated or colliod homogenous mixture which has all the components in the same phase. emulsions or what ever idk your answer but that my best answer :3

8 0

3 years ago