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2 years ago

Based on the information in the table, which elements are most likely in the same periods of the periodic table?

Chemistry

2 answers:

daser333 [38]2 years ago

3 0

The answer is A.Boron and carbon are likely together in one period because they have very close atomic numbers, while gallium and germanium are likely together in another period because they have very close atomic numbers.

Stells [14]2 years ago

3 0

The element that are most likely in the same period of periodic table is

Boron and carbon are likely together in one period because they have very close atomic number, while gallium and germanium are likely together in another period because they have very close atomic numbers ( answer A)

Explanation

Element in same period have the close atomic number .
The atomic number of an element is determined by number of protons the element have.
The number of proton are equal to number of electrons

Therefore boron is in atomic number 5 with 2.3 electronic configuration while carbon is in atomic number 6 with 2.4 electron configuration

since both boron and carbon have two energy level they are in period 2.

Gallium is in atomic number 31 with 2.8.8.8.5 electron configuration while Germanium (Ge) is in atomic number 32 with 2.8.8.8.6 electron configuration.

Since both gallium and germanium has 5 energy level they are in same period (period 5)

for example Aluminum,boron and gallium are in group (iii) since they have 3 valence electrons.

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At a constant temperature, a sample of helium at 760 torr in a closed container was compressed from 5.0 L to 3.0 L. What was the

borishaifa [10]

Answer:

The new pressure exerted by the He, is 1266.6 Torr

Explanation:

A typical problem of gases where the volume is increased and the moles and T° keeps on constant. This is an indirect proportion because when the volume of the flask is increased, pressue decreases because molecules collide to a lesser extent with the walls of the vessel.

P₁ . V₁ = P₂ . V₂

760 Torr . 5L = P₂ . 3L

P₂ = (760 Torr . 5L) / 3L

P₂ = 1266.6 Torr

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3 years ago

A sealed 1.0 L flask is charged with 0.500 mol of I2 and 0.500 mol of Br2. An equilibrium reaction ensues: I2 (g) + Br2 (g) ↔ 2I

Daniel [21]

Answer: Thus the value of $K_{eq}$ is 110.25

Explanation:

Initial moles of $I_2$ = 0.500 mole

Initial moles of $Br_2$ = 0.500 mole

Volume of container = 1 L

Initial concentration of $I_2=\frac{moles}{volume}=\frac{0.500moles}{1L}=0.500M$

Initial concentration of $Br_2=\frac{moles}{volume}=\frac{0.500moles}{1L}=0.500M$

equilibrium concentration of $IBr=\frac{moles}{volume}=\frac{0.84mole}{1L}=0.84M$ [/tex]

The given balanced equilibrium reaction is,

$I_2(g)+Br_2(g)\rightleftharpoons 2IBr(g)$

Initial conc. 0.500 M 0.500 M 0 M

At eqm. conc. (0.500-x) M (0.500-x) M (2x) M

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[IBr]^2}{[Br_2]\times [I_2]}$

$K_c=\frac{(2x)^2}{(0.500-x)\times (0.500-x)}$

we are given : 2x = 0.84 M

x= 0.42

Now put all the given values in this expression, we get :

$K_c=\frac{(0.84)^2}{(0.500-0.42)\times (0.500-0.42)}$

$K_c=110.25$

Thus the value of the equilibrium constant is 110.25

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3 years ago

How many grams in 10 ounces

Kamila [148]

Answer:

283.495g

Explanation:

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3 years ago

Read 2 more answers

The number of hydrogen atoms in 0.050 mol of c3h8o3 is

Natalka [10]

Answer:

2.40 × 10²³ Atoms of Hydrogen

Solution:

The number of hydrogen atoms in C₃H₈O₃ are calculated as;

As, there are eight hydrogen atoms per molecule of C₃H₈O₃, therefore the number of hydrogen atoms per mole of C₃H₈O₃ are calculated as;

1 mole C₃H₈O₃ contains = 6.022 × 10²³ Molecules of C₃H₈O₃

So,

0.05 mole C₃H₈O₃ will contain = X Molecules of C₃H₈O₃

Solving for X,

X = (0.05 × 6.022 × 10²³) ÷ 1

X = 3.011 × 10²² Molecules of C₃H₈O₃

As,

1 Molecule of C₃H₈O₃ contains = 8 Atoms of Hydrogen

So,

3.011 × 10²² Molecules of C₃H₈O₃ will contain = X Atoms of Hydrogen

Solving for X,

X = (3.011 × 10²² × 8) ÷ 1

X = 2.40 × 10²³ Atoms of Hydrogen

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3 years ago

Explain how cells can only come from pre-existing cells. How does that work ?

AysviL [449]

Answer:

Cells can only be formed by division of pre-existing cells. [Students should be aware that the 64 codons in the genetic code have the same meanings in nearly all organisms, but that there are some minor variations that are likely to have accrued since the common origin of life on Earth

Explanation:

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2 years ago