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3 years ago

Which set of elements has physical and chemical properties similar to phosphorus?

Chemistry

2 answers:

astraxan [27]3 years ago

7 0

The 4 one because it’s the right

Gwar [14]3 years ago

3 0

Nitrogen, arsenic, antimony & bismuth

Explanation:

Phosphorus belongs to the 15th group, that is nitrogen family.

Natures are decided by the number of valence electrons.

In a family, all elements have same outer electronic configuration or you say number of electrons.

General electronic con.: ns²np³

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The number of neutrons in one atom of mercury with mass number 204 is:

Talja [164]

Number of neutrons is 121.

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3 years ago

1. A mineral that is essential for production of blood cells in bone marrow_________.

IgorC [24]

Answer:

Iron

Explanation:

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4 years ago

18.A 2.50 L sample of dry air in a cylinder exerts a pressure of

Vlada [557]

Answer:

$\boxed{\text{7.50 L}}$

Explanation:

The temperature and amount of gas are constant, so we can use Boyle’s Law.

$p_{1}V_{1} = p_{2}V_{2}$

Data:

$\begin{array}{rclrcl}p_{1}& =& \text{3.00 atm}\qquad & V_{1} &= & \text{2.50 L} \\p_{2}& =& \text{1.00 atm}\qquad & V_{2} &= & ?\\\end{array}$

Calculations:

$\begin{array}{rcl}3.00 \times 2.50 & =& 1.00V_{2}\\7.500 & = & 1.00V_{2}\\V_{2} & = &\textbf{7.50 L}\\\end{array}\\\text{The volume of the gas is } \boxed{\textbf{7.50 L}}$

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3 years ago

Steam condenses into liquid water (the steam is the system). In this process .... Group of answer choices the heat leaves the sy

Vedmedyk [2.9K]

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4 years ago

A 4.000 g sample of an unknown metal, M, was completely burned in excess O2 to yield 0.02225 mol of the metal oxide, M2O3. What

Solnce55 [7]

4X + 3O₂ = 2X₂O₃

n(X₂O₃)=0.02225 mol
m(X)=4.000 g
x - the molar mass of metal

m(X)/4x=n(X₂O₃)/2

x=m(X)/{2n(X₂O₃)}

x=4.000/{2*0.02225)=89.89 g/mol

X=Y (yttrium)

7 0

4 years ago