All categories

3 years ago

What is symbol, molecule, electrovalent compound?

Chemistry

1 answer:

jok3333 [9.3K]3 years ago

8 0

Answer:

the abbreviation form of full name is called symbol.

the smallest unit of cimpound is called molecule.

You might be interested in

What is the density of a object whose dimensions are 5.54

Tcecarenko [31]

The object with dimensions $5.54\ cm \times 10.6\ cm \times 199\ cm$ and with mass 250.6 g will have a density equal to $0.02144\ g/cm^3$ .

<h3>Explanation:</h3>

Given:

Dimensions of the object = $5.54\ cm \times 10.6\ cm \times 199\ cm$

length = l = 5.54 cm

width = w = 10.6 cm

height = h = 199 cm

Mass of the object = m = 250.6 g

Formula:

The relation between density, mass and volume of any object is given by:

$Density = \frac{ Mass }{Volume}$

Since volume of an object with length (l), width (w) and height (h) [assuming a rectangular object] can be defined as,

$V = l \times w \times h =5.54 \times 10.6 \times 199$

$Volume = V = 11686.076\ cm^3$

$Density = Mass / Volume = \frac{250}{11686.076}$

$Density = 0.02144 g/cm^3$

Density of the object is $0.02144 g/cm^3$

5 0

3 years ago

The three states of matter are solid, liquid, and gas. true or false

maria [59]

That is True XD
Hope that helps :D

3 0

3 years ago

g The following reaction is the first step in the production of nitric acid from ammonia. 4NH3(g) 5O2(g) → 4NO(g) 6H2O(g) Calcul

STatiana [176]

Answer: The enthalpy of the reaction is coming out to be -902 kJ.

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as $\Delta H$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H_{rxn}=\sum [n\times \Delta H_f_{(product)}]-\sum [n\times \Delta H_f_{(reactant)}]$

For the given chemical reaction:

$4NH_3(g)+5O_2(g)\rightarrow 4NO(g)+6H_2O(g)$

The equation for the enthalpy change of the above reaction is:

$\Delta H_{rxn}=[(4\times \Delta H_f_{(NO(g))})+(6\times \Delta H_f_{(H_2O(g))})]-[(4\times \Delta H_f_{(NH_3(g))})+(5\times \Delta H_f_{(O_2)})]$

We are given:

$\Delta H_f_{(NO(g))}=91.3kJ/mol\\\Delta H_f_{(H_2O(g))}=-241.8kJ/mol\\\Delta H_f_{(NH_3(g))}=-45.9kJ/mol\\\Delta H_f_{(O_2)}=0kJ/mol$

Putting values in above equation, we get:

$\Delta H_{rxn}=[(4\times (91.3))+(6\times (-241.8))]-[(4\times (-45.9))+(5\times (0))]\\\\\Delta H_{rxn}=-902kJ$

Hence, the enthalpy of the reaction is coming out to be -902 kJ.

8 0

4 years ago

Which do all groups of plants have these are the choices A.chloroplasts B.roots C.spores D.tubes

den301095 [7]

A.chloroplasts every plant needs it

5 0

3 years ago

Read 2 more answers

What's the atomic mass unit of helium?

Alex17521 [72]

4.002602 u ± 0.000002 u

4 0

3 years ago

What is symbol, molecule, electrovalent compound?​

What is symbol, molecule, electrovalent compound?