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Arisa [49]
3 years ago
9

The earth rotates on an imaginary line called an?

Chemistry
2 answers:
Ierofanga [76]3 years ago
8 0
The Earth rotates on an imaginary line called an axis, which runs through Earth from the North Pole to the South Pole. The rotation of the Earth causes day
Vesna [10]3 years ago
6 0

Answer:

The earth rotates on an imaginary line called an?

axis.

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In a coffee-cup calorimeter, 100.0 g of H2O and 8.70 grams of Na3PO4 are added. The water had an initial temperature of 24.6 oC.
Alex

Answer:

a.) exothermic

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Explanation:

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3 years ago
To make a 2.0-molar solution, how many moles of solute must be dissolved in 0.50 liters of solution?
attashe74 [19]
Moles = Molarity x Volume

Moles = 2.0 x 0.50

= 1.0 mole

hope this helps!

4 0
3 years ago
The work of Alexander Fleming shows that _____. A. lab accidents can be very dangerous B. results need to be confirmed by other
pashok25 [27]

Answer:

B

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In laboratory experiment, a NOVDEC Student was
Ede4ka [16]

Answer:

i. Molar mass of glucose = 180 g/mol

ii. Amount of glucose = 0.5 mole

Explanation:

<em>The volume of the glucose solution to be prepared</em> = 500 cm^3

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i. Molar mass of glucose (C_1_2H_6O_6) = (6 × 12) + (12 × 1) + (6 × 16) = 180 g/mol

ii.<em> mole = molarity x volume</em>. Hence;

amount (in moles) of the glucose solution to be prepared

                 = 1 x 500/1000 = 0.5 mole

3 0
3 years ago
Which of the following is the correct angle between the atoms in a tetrahedral molecule? A. 90o B. 109o C. 120o D. 270o
sineoko [7]
The correct angle between the atones in a tetrahedral molecule would be B. 109 degrees.
3 0
4 years ago
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