All categories

2 years ago

The atomic number of an element indicates the number of?

Chemistry

1 answer:

marshall27 [118]2 years ago

6 0

Answer:

The number is mostly related to the mass or the weight of the element.

Explanation:

You might be interested in

A reaction produced 37.5 L of oxygen gas at 307 K and 1.25 atm. How many moles of oxygen were produced?

MariettaO [177]

On the basis of the given data:

Volume (V) is 37.5 L

Temperature (T) is 307 K

Pressure (P) is 1.25 atm

In order to calculate the number of moles, the formula to be used is PV = nRT, Here R is 0.0821 Latm/mol/K

n = PV / RT

n = 1.25 atm × 37.5 L / 0.0821 Latm/mol/K × 307 K

n = 1.85 mol

3 0

3 years ago

Suppose that 10.0 L of Carbon Dioxide gas are produced by this reaction, 4C3H5N3O9 -> 12 CO2 + 10H2O + 6N2 +O2, at a temperat

siniylev [52]

The mass of nitroglycerin : 34.52 g

<h3>Further explanation</h3>

Reaction

4C₃H₅N₃O₉ ⇒ 12 CO₂ + 10H₂O + 6N₂ +O₂

Volume = 10 L

Temperature = -5°C=268 °K

Pressure = 1 atm

mol of CO₂ (ideal gas) :

$\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1\times 10}{0.082\times 268}\\\\n=0.455$

mol ratio C₃H₅N₃O₉ : mol CO₂= 4 : 12, so mol C₃H₅N₃O₉ :

$\tt \dfrac{4}{12}\times 0.455=0.152$

mass C₃H₅N₃O₉ (MW=227,0865 g/mol):

$\tt 0.152\times 227.0865=\boxed{\bold{34.52~g}}$

4 0

2 years ago

Sam and Jane have been investigating the amount of copper sulphate that can be dissolved in water at different temperatures .The

MAXImum [283]

Answer:

This question is so confusing, I'm sorry

8 0

2 years ago

_________one moleculetwo moleculesone moletwo moles of H2(g) reacts with _________one moleculetwo moleculesone moletwo moles of

Arisa [49]

Answer:

The reaction between hydrogen and fluorine.

Explanation:

The balanced chemical equation of the reaction is:

$H_2(g)+F_2(g)->2HF(g)$

From the balanced chemical equation, it is clear that:

1 mole of $H_2$ gas reacts with one mole of $F_2(g)$ and forms 2 moles of HF(g).

8 0

2 years ago

The system described by the reaction CO(g)+Cl2(g)⇌COCl2(g) is at equilibrium at a given temperature when PCO= 0.26 atm , PCl2= 0

givi [52]

<u>Answer:</u> The new pressure of CO is 0.09 atm

<u>Explanation:</u>

For the given chemical reaction:

$CO(g)+Cl_2(g)\rightleftharpoons COCl_2(g)$

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{COCl_2}}{p_{CO}\times p_{Cl_2}}$ .......(1)

We are given:

$p_{COCl_2}=0.66atm\\p_{CO}=0.26atm\\p_{Cl_2}=0.15atm$

Putting values in above equation, we get:

$K_p=\frac{0.66}{0.15\times 0.26}\\\\K_p=16.92$

Addition pressure of chlorine added = 0.39 atm

Now, the equilibrium is re-established:

$CO(g)+Cl_2(g)\rightleftharpoons COCl_2(g)$

Initial: 0.26 0.15 0.66

At eqllm: 0.26-x 0.54 0.66+x

Putting values in expression 1, we get:

$16.92=\frac{(0.66+x)}{(0.26-x)\times 0.54}\\\\x=0.17$

So, new pressure of CO = 0.26 - x = (0.26 - 0.17) = 0.09 atm

Hence, the new pressure of CO is 0.09 atm

4 0

2 years ago