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4 years ago

There is a meme in the image i have what does it mean

Chemistry

2 answers:

Gelneren [198K]4 years ago

5 0

Answer:

The 4s2 is preventing 3d10 from following 1s2 2s2 2p6 3s2 3p6.

Explanation:

the meme is quite common.

Lubov Fominskaja [6]4 years ago

4 0

Answer:

It’s alien language

Explanation:

You might be interested in

. The density of gold is 19.32 g/mL. A U.S. $5.00 gold coin has a diameter of 1.62 cm and a thickness of 0.085 cm. The price of

Lostsunrise [7]

Answer:

$182 is the value of the gold in the coin

Explanation:

Diameter is 2r, the ratio of the coin is = 1.62cm / 2 = 0.81cm

Following the formula of the volume of the coin:

V = π r² h

V = π*(0.81cm)²*0.085cm

V = 0.172cm³ = mL

As the density of the gold is 19.32g/mL, the mass of 0.1752mL of gold is:

0.1752mL * (19.32g / mL) =

3.385g is the mass of the coin

As the price of the gold is $53.90 / g, the value of the gold in the coin is:

3.385g * ($53.90 / g) =

<h3>$182 is the value of the gold in the coin</h3>

7 0

3 years ago

How is Oxygen -18 different from oxygen -16?

Oksanka [162]

A O-18 has 2 more neutrons than O-16

<h3>Further explanation</h3>

Oxygen is located in group 16 in the p block which has the atomic number 8

In the atomic symbol (neutral), the atomic number indicates the number of electrons and protons. while the number of neutrons is obtained from the difference between the mass number and the atomic number.

The isotope will have the same number of protons (atomic number) but a different mass number

Isotopes of oxygen include: O-18 and O-16

$\tt _8^{18}O~\rightarrow neutron=18-8=10,proton=8\\\\_8^{16}O\rightarrow neutron=16-8=8,proton=8$

6 0

3 years ago

Check the box of any item below that can be categorized as matter.

Ber [7]

Molecules of salt, atoms, chocolate cake, cells, magnets

8 0

3 years ago

phosphorus trifluoride is formed from its elements P4 (s) F2 (g) ---> PF3 (g) how many grams of fluorine are needed to react

Oksi-84 [34.3K]

This is an incomplete question, here is a complete question.

Phosphorus trifluoride is formed from its elements.

$P_4(s)+6F_2(g)\rightarrow 4PF_3(g)$

How many grams of fluorine are needed to react with 6.20 g of phosphorus?

Answer : The mass of $F_2$ needed are, 11.4 grams.

Explanation : Given,

Mass of $P_4$ = 6.20 g

Molar mass of $P_4$ = 124 g/mol

Molar mass of $F_2$ = 38 g/mol

First we have to calculate the moles of $P_4$

$\text{Moles of }P_4=\frac{\text{Given mass }P_4}{\text{Molar mass }P_4}$

$\text{Moles of }P_4=\frac{6.20g}{124g/mol}=0.05mol$

Now we have to calculate the moles of $F_2$

The balanced chemical equation is:

$P_4(s)+6F_2(g)\rightarrow 4PF_3(g)$

From the balanced reaction we conclude that

As, 1 mole of $P_4$ react with 6 moles of $F_2$

So, 0.05 moles of $P_4$ react with $0.05\times 6=0.30$ moles of $F_2$

Now we have to calculate the mass of $F_2$

$\text{ Mass of }F_2=\text{ Moles of }F_2\times \text{ Molar mass of }F_2$

$\text{ Mass of }F_2=(0.30moles)\times (38g/mole)=11.4g$

Therefore, the mass of $F_2$ needed are, 11.4 grams.

4 0

3 years ago

Two experiments were conducted in a bomb calorimeter. The first one to determine the heat capacity of the calorimeter, the secon

Alex787 [66]

Answer: $2460J/g^0C$

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

$Q=C\times \Delta T$

Q = Heat absorbed by calorimeter = $5682$ Joules

C = heat capacity of calorimeter = ?

Initial temperature of the calorimeter = $T_i$ = 22.37°C

Final temperature of the calorimeter = $T_f$ = 24.68°C

Change in temperature , $\Delta T=T_f-T_i=(24.68-22.37)^0C=2.31^0C$

Putting in the values, we get:

$5682=C\times 2.31^0C$

$C=2460J/g^0C$

The heat capacity of the calorimeter is $2460J/g^0C$

7 0

3 years ago