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melisa1 [442]
3 years ago
6

Select the correct formula for the polyatomic ion.

Chemistry
2 answers:
Helga [31]3 years ago
7 0
The poly atomic ion formula for ammonium would be NH4+
nignag [31]3 years ago
4 0

Answer:

B (NH4+)

For the next one (nitrate ion) it's A (NO3-)

For the last (chromate ion...) it's C (CrO4^2-)

Explanation:

For edge:)

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when water changes from a liquid on earths surface to a gas in the atmosphere,this is known as evaporation

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What is the most corrosive element in the periodic table?
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Fluorine is the most corrosive element in the periodic table.

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An object which allows light to show through it unaltered is called?​
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Transparency (also called pellucidity or diaphaneity) in the field of optics is the physical property of allowing light to pass through the material without significant light dispersion.
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Why is it difficult to classify hydrogen was a metal or non metal
sladkih [1.3K]

Answer:

Because of its ability to create cations, hydrogen is a nonmetal that belongs to the same category as metals. Despite its presence in Group I (alkali metals) of the periodic table, hydrogen is not considered a metal.

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3 years ago
A hot air balloon can have a volume of 2950 cubic meters (2.95 ✕ 106 liters) and operate at temperatures up to 250°F (121°C). As
TiliK225 [7]

Answer:

2.64 × 10⁶ g

Explanation:

We can find the mass of air using the ideal gas equation.

P.V=n.R.T=\frac{m}{M} .R.T

where,

P is the pressure (P = 1.00 atm)

V is the volume (V = 2.95 × 10⁶ L)

n is the number of moles

R is the ideal gas constant (0.08206atm.L/mol.K)

T is the absolute temperature (121°C + 273 = 394 K)

m is the mass

M is the molar mass (28.09 g/mol)

m=\frac{P.V.M}{R.T} =\frac{1.00atm \times 2.95 \times 10^{6} L \times 28.97g/mol}{(0.08206atm.L/mol.K) \times 394 K } =2.64 \times 10^{6} g

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3 years ago
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