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nalin [4]
3 years ago
14

Oxygen is composed of only one kind of atom and can’t be separated into simpler substances. What type of matter is it?

Chemistry
2 answers:
lana [24]3 years ago
7 0

Answer:

Element

Explanation:

<em>When atoms can't be chemically separated into simpler substances, they are an element.</em>

Alternatively: Oxygen can be found in the Periodic Table of Elements. Thus, it is an element.

All the other options (solution, mixture, compound and colloid) refer to different way in which two or more substances (be it elements or molecules) are together.

lozanna [386]3 years ago
6 0
Definetely element.

Hope this helps!

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why mixture of stone pebbles And water is concerned considered suspension you are provided with a mixture of sand salt and camph
baherus [9]

Answer:

camphor sublimates salt is soluble in water while sand does not sublime and does not dissolve in water you first heat the mixture in a beaker covered with a watch glass camphor will then accumulate on the watch glass then you dissolve the remaining mixture of sand and salt salt will dissolve forming a salt solution then you filter using a filter paper and a beaker the residue on the filter paper is sand while the filtrate is salt solution you then heat the salt solution so that it can evaporate leaving salt particles thus you will have obtained salt sand and camphor

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3 years ago
Question 27 Unsaved
lina2011 [118]

Answer:4)Wind energy can harm migrating birds.

Explanation:

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3 years ago
How many grams of water can be formed from the reaction of 8.76 grams of H2 with 10.5 liters of O2 (at STP) according to the bal
Kisachek [45]

Answer:

16.9g of H₂O can be formed

Explanation:

Based on the chemical reaction, 2 moles of H₂ react per mole of O₂. To anser this question we must find limiting reactant converting the mass and volume of each reactant to moles:

<em>Moles H₂ -Molar mass: 2.016g/mol-:</em>

8.76g * (1mol / 2.016g) = 4.345 moles

<em>Moles O₂:</em>

PV = nRT

PV/RT = n

P = 1atm at STP

V = 10.5L

R = 0.082atmL/molK

T = 273.15K at STP

n = 1atm*10.5L / 0.082atmL/molK*273.15K

n = 0.469 moles of oxygen

For a complete reaction of 4.345 moles moles of hydrogen are required:

4.345 moles H2 * (1mol O2 / 2mol H2) = 2.173 moles of O2 are required. As there are just 0.469 moles, Oxygen is limiting reactant

Now, 1 mole of O2 produce 2 moles of H2O. 0.469 moles will produce:

0.469 moles O₂ * (2 moles H₂O / 1mol O₂) = 0.938 moles H₂O.

The mass is -Molar mas H₂O = 18.01g/mol-:

0.938 moles * (18.01g/mol) =

<h3>16.9g of H₂O can be formed</h3>
8 0
3 years ago
2. Most species fail in new environments because of.
EastWind [94]

Most species fail in new environments because of: Low population numbers

8 0
2 years ago
Need science help (screenshot included)
Dima020 [189]

A. False. If it is high tide in one place on Earth, the place exactly opposite to it will also have a <em>high</em> tide.

The gravitational attraction of the Moon and the inertia of the oceans cause <em>two tidal bulges </em>on opposite sides of the Earth.

B. True. Cassini used flybys of Venus, Earth and Jupiter as slingshots to reach Saturn.

C. True. The whole solar system moves around the galaxy.

D. True. If a planet’s gravity is not strong enough, the molecules in its atmosphere will have enough kinetic energy to escape into space.

E. False. The <em>mass of an object is constant</em>, but its <em>weight changes</em> according to the gravity of the planet.

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F = mg  or weight = mass × gravity

∴ <em>Mass = weight/gravity </em>

6 0
3 years ago
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