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3 years ago

What is the new item that is formed after a chemical reaction called

Chemistry

1 answer:

Kamila [148]3 years ago

7 0

The new item formed is called a product.

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Magnesium oxide (mgo) has the rock salt crystal structure and a density of 3.58 g/cm3. the atomic weights of magnesium and oxyge

serg [7]

Answer:

(a) The unit cell edge length <u>0.421 nm</u>

Explanation:

Lets calculate -:

Given -

density = $3.58g/cm^3$

Molecular weight of MgO = 24.31 +16

$40.13 g/mole$

Avagadro number = $6.022\times10^2^3$

In rock salt structure , there are four anions and four cations , hence Z=4 (Number of formula per unit cell)

Now, using the formula -

$d=\frac{ZM}{N_Aa^3}$

$a=[\frac{ZM}{N_Ad}]]^\frac{1}{3}$

Now, putting the given values

$a=\frac{4\times40.13g/mole}{6.022\times10^2^3\times(3.58g/cm^3)}$

$4.21\times10^-^8 cm$

= 0.421 nm

<u>Hence , the unit cell edge length = 0.421 nm </u>

3 0

2 years ago

in the curcute diagram what does the symbole made of two long lines and two short lines with a positive and a negitive sighnat e

marta [7]

Answer:Here is a real answer unike that other person a source of electric energy

Explanation:

3 0

3 years ago

Determine the chemical formulas for the following molecules:

Y_Kistochka [10]

Answer:

A. BeCl2

B. PBr5

C. CH4

D. AlCl₃

E. CH2Cl2

F. BF3

G. Cl6W

7 0

3 years ago

A gas is sealed in a bottle at 25°C and 1.50 atm pressure. How must the storage conditions be changed to bring the gas to Standa

Katarina [22]

Answer: The correct option is (C).

Explanation:

At STP, condition the the value of pressure is taken to be 1 atm.

At STP, condition the the value of Temperature is taken to be 0° C that is 273 K.

So, in order to keep the gas sealed under the bottle at STP, Temperature should decreases by the 25°C and pressure should decreased by 0.500 atm.

Temperature to be kept at= 25°C - 25°C = 0°C

Pressure to be kept at =1.50 atm - 0.500 atm =1.000 atm

Hence, the correct option is (C).

6 0

3 years ago

Read 2 more answers

1 point

creativ13 [48]

Answer:

Explanation:

pa brainlest po ty po

8 0

2 years ago