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Alekssandra [29.7K]
3 years ago
15

ancient hunters used obsidian rock to make spears. given this information, what can you conclude about the minerals in obsidian

rock? explain your reasoning.
Chemistry
1 answer:
jek_recluse [69]3 years ago
6 0

it must have been light, so it can be more mobile, and strong to penetrate skin and flesh, and easy to carve so they can put it on a spear.

your welcome and a brainliest would be nice if you can

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What happens when you combine Bleach And Ammonia?<br> best answer will get brainly
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It can be very dangerous and possibly deadly to mix bleach and ammonia.

Explanation:

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Use your knowledge of atoms, bonding, and the periodic table to complete the chemical equation .”CH4 + O2
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Arrange the following types of photons of electromagnetic radiation in order of decreasing energy: red light, radio, x-rays, γ-r
Rina8888 [55]

Answer:

Decreasing order is as follows:

γ-rays > x-rays > red light > infrared > radio

Explanation:

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In other words, energy decreases as the wavelength of electromagnetic radiation increases.

Order of wavelength for the given radiations are as follows:

Radio > infrared > red light > x-rays > γ-rays

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3 0
3 years ago
What is the pressure of a mixture of 0.200 g of H2, 1.00 g of N2 , and 0.820 g of Ar in a container with a volume of 2.00 L at 2
alexdok [17]

Answer:

P(mixture) = 1.92 atm

Explanation:

Given data:

Mass of H₂ = 0.200 g

Mass of N₂ = 1.00 g

Mass of Ar = 0.820 g

Volume = 2 L

Temperature = 20°C

Pressure of mixture = ?

Solution:

Pressure of hydrogen:

Number of moles of hydrogen = mass / molar mass

Number of moles of hydrogen = 0.200 g / 2 g/mol

Number of moles of hydrogen = 0.1 mol

P = nRT / V

P = 0.1 mol× 0.0821 atm. L.mol⁻¹ .k⁻¹ × 293 K / 2L

p = 2.41 atm. L /2 L

P = 1.2 atm

Pressure of nitrogen:

Number of moles of nitrogen = mass / molar mass

Number of moles of nitrogen = 1 g / 28 g/mol

Number of moles of nitrogen = 0.04 mol

P = nRT / V

P = 0.04 mol× 0.0821 atm. L.mol⁻¹ .k⁻¹ × 293 K / 2L

p = 0.96 atm. L /2 L

P = 0.48 atm

Pressure of argon:

Number of moles of argon = mass / molar mass

Number of moles of argon = 0.820 g / 40 g/mol

Number of moles of argon = 0.02 mol

P = nRT / V

P = 0.02 mol× 0.0821 atm. L.mol⁻¹ .k⁻¹ × 293 K / 2L

p = 0.48 atm. L /2 L

P = 0.24 atm

Total pressure of mixture:

P(mixture)  = pressure of hydrogen + pressure of nitrogen + pressure of argon

P(mixture)  = 1.2 atm + 0.48 atm + 0.24 atm

P(mixture) = 1.92 atm

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The arrangement of things in the order that they occurred.
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