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2 years ago

Why do the explosions get more violent the farther down the periodic table you go?

Chemistry

1 answer:

rewona [7]2 years ago

5 0

Answer:

As we go down the group, the atom gets bigger. The bigger the atom, the further away the last electron. Therefore, the attraction between the nucleus and the last electron gets weaker. This makes it easier for the atom to give up the electron which increases its reactivity.

Explanation:

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Carry out some research into how new elements get their name and their symbols. Write out a short passage (no more than 50 words

spin [16.1K]

The IUPAC says that elements have to be named after one of five things: a scientist, a place, a mineral or substance, a descriptor of the element, or a mythological reference. Of the new elements, three are named after places and one is named after a person No-one has yet named an element after themselves but many elements are named in tribute to important scientists
(you can cut some stuff out)

6 0

2 years ago

What is a direct combination reaction?

Leona [35]

It is one of the most common types of chemical reactions and can also be called a synthesis reaction. In this reaction, two or more chemical species combine to form a more complex product.

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2 years ago

Read 2 more answers

Using the following thermochemical equation, determine the amount of heat produced per kg of CO2 formed during the combustion of

Arisa [49]

Answer: 12033 kJ of heat produced per kg of $CO_2$ formed during the combustion of benzene

Explanation:

The balanced chemical equation for combustion of benzene is :

$2C_6H_6(l)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)$ $\Delta H°rxn$ = -6278 kJ

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

$\text{Moles of }CO_2=\frac{\text{given mass}}{\text{Molar Mass}}=\frac{1000g}{44g/mol}=23mol$ (1kg=1000g)

According to stoichiometry :

12 moles of $CO_2$ on combustion produce heat = 6278 kJ

Thus 23 mole of $CO_2$ on combustion produce heat = $\frac{6278}{12}\times 23=12033kJ$

Thus 12033 kJ of heat produced per kg of $CO_2$ formed during the combustion of benzene

5 0

2 years ago

A 2.04 g lead weight, initially at 10.8 oC, is submerged in 7.74 g of water at 52.2 oC in an insulated container. clead = 0.128

QveST [7]

Answer:

Explanation:

Hello, in this case, the lead is catching heat and the water losing it, that's why the heat relation ship is (D is for Δ):

$DH_{lead}=-DH_{water}$

Now, by stating the heat capacity definition:

$m_{Pb}C_{Pb}*(T_{eq}-T_{lead}=-m_{H_2O}C_{H_2O}*(T_{eq}-T_{H_2O})\\$

Solving for the equilibrium temperature:

$T_{eq}=\frac{m_{Pb}C_{Pb}T_{Pb}+m_{H_2O}C_{H_2O}T_{H_2O}}{m_{Pb}C_{Pb}+m_{H_2O}C_{H_2O}} \\\\T_{eq}=\frac{2.04g*0.128J/(g^oC)*10.8^oC+7.74g*4.18J/(g^oC)*52.2^oC}{2.04g*0.128J/(g^oC)+7.74g*4.18J/(g^oC)} \\\\T_{eq}=51.87^oC$

Which is very close to the water's temperature since the lead's both mass and head capacity are lower than those for water.

Best regards.

5 0

2 years ago

What is the balanced equation for CaCO3(s) > CaO(s) + CO2(g

vlada-n [284]

Balanced equation :

1 CaCO3(s) = 1 CaO(s) + 1 CO2(g)

hope this helps!

3 0

3 years ago