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Mashcka [7]
3 years ago
5

PLEASE HELP! 50 POINTS IF CORRECT!

Chemistry
2 answers:
Leviafan [203]3 years ago
8 0
I believe the answer is either B or D. The earth axis is only slightly tilted and the equator goes opposite in a sense to the axis
Daniel [21]3 years ago
4 0
The diagram below represents the season changes on earth caused by the relationship between earth the earth and the sun.

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A glass flask has a volume of 500 mL at a temperature of 20° C. The flask contains 492 mL of mercury at an equilibrium temperatu
OverLord2011 [107]

Answer:

101.63° C

Explanation:

Volume expansivity γa = γr -  γ g = 18 × 10⁻⁵ - 2.0 × 10⁻⁵ = 16 × 10⁻⁵ /K

v₂ - v₁ / v₁θ = 16 × 10⁻⁵ /K

(500 - 492 ) mL / (492 × 16 × 10⁻⁵) = θ

θ = 101.63° C

4 0
3 years ago
Calcium’s atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?
Gnom [1K]
It would be a positive charge because it lost two electrons, if the charge was neutral it would be the same amount of protons and electrons, if the charge was negative the electrons would be 20 instead of 18. So in this case it is positive.
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3 years ago
Which highway run through comlumbus
Alexeev081 [22]

Answer:

Highway 22 ,GA 31820

Explanation:

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3 years ago
Which of the following is used for chemical symbols today? a. drawings c. letters b. icons d. numbers
devlian [24]

Answer:

Letters

Explanation:

For example, today we use the periodic table which is full of elements named with 1 or 2 letters. Like how Helium is He and Sodium is Na. Hope this helps!!!

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Explain why a luminous flame of a Bunsen burner produces bright yellow light​
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