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NISA [10]
3 years ago
9

According to the periodic table, which of these elements will form an ion with a –2 charge? calcium

Chemistry
1 answer:
Serga [27]3 years ago
6 0

Answer:

hfjfuufhdhdhjdjdjjdjjdudjfjfjjfjfjjfjf

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A syringe containing 1.63 mL of oxygen gas is cooled from 91.0 ∘C to 0.9 ∘C. What is the final volume Vf of oxygen gas? (Assume
Archy [21]

Answer:

Vf = 1.22 mL

Explanation:

If we assume that the pressure is constant and the number of moles does not change, we can say that the volume of the gas is modified in a directly ratio, to the Absolute Temperature.

Let's convert the values:

91°C + 273 = 364K

0.9°C + 273 = 273.9K

Volume decreases if the temperature is decreases

Volume increases if the T° increases

V₁ / T₁  = V₂ / T₂ → 1.63mL /364K = V₂ / 273.9K

V₂ = (1.63mL /364K) . 273.9K → 1.22 mL

5 0
4 years ago
Read 2 more answers
aqueous solutions of barium chloride and potassium carbonate combine to produce a precipitate. what are the spectator ions?​
nalin [4]

Answer:BaCl (aq)+ K2CO3 (aq)——> Ba2CO3 (aq) + KCl (aq)

Explanation:

The equation is already balanced and it is a double replacement reaction.

8 0
3 years ago
What is the formula for calculating the average velocity of a moving object?
vovikov84 [41]

Average velocity (v) of an object is equal to its final velocity (v) plus initial velocity (u), divided by two. Where: ¯v = average velocity.

Hope this helps :)

And could i please have brainliest

4 0
3 years ago
Compare the type of change that occurs when a substance melts and when a substance is set on fire. Use complete sentences to jus
Amiraneli [1.4K]

When a substance melts it has changed from a solid to a liquid state while when a substance is set on fire is changes from liquid to gaseous state as it boils.

<h3>What is change of state?</h3>

Change of state of matter is the transformation of a substance from one phase of matter to another.

When a substance melts it has changed from a solid to a liquid state while when a substance is set on fire is changes from liquid to gaseous state as it boils.

Learn more about matter here:

brainly.com/question/3998772

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8 0
2 years ago
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There are three isotopes of hydrogen H-1, H-2, and H-3 all of these isotopes have
levacccp [35]
<span>There are three isotopes of hydrogen H-1, H-2, and H-3 all of these isotopes have "One Proton"

Hope this helps!</span>
4 0
3 years ago
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