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Tju [1.3M]
3 years ago
12

A force that slows down airplanes

Chemistry
2 answers:
Julli [10]3 years ago
8 0
Air resistance slows down air planes.
Advocard [28]3 years ago
3 0
I  can think of 2 off the top of my head first is friction and second is gravity
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How mant atoms are in 3N2
geniusboy [140]

6N

Explanation:

you times 3 and 2 to get six.

8 0
3 years ago
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What is FALSE about nitrogen gas and carbondioxide?
Umnica [9.8K]

Answer:

4

Explanation:

both are gases, both are compounds , they are nonmetal so that leaves 4

5 0
3 years ago
What is the kinetic energy of a 478 kg object that is moving with a speed of 15m/s
AVprozaik [17]

Answer:Kinetic energy = (1/2)*mass*velocity^2

KE = (1/2)mv^2

KE = (1/2)(478)(15)^2

KE = 53775J

Explanation:

Kinetic energy = (1/2)*mass*velocity^2

KE = (1/2)mv^2

KE = (1/2)(478)(15)^2

KE = 53775J

8 0
2 years ago
A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate
AlladinOne [14]

The given question is incomplete. The complete question is as follows.

A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate forms. The precipitate is filtered and dried and then found to have a mass of 212 mg. What mass of barium was in the original solution? (Assume that all of the barium was precipitated out of solution by the reaction.)

Explanation:

When Ba^{2+} and Na_{2}SO_{4} are added  then white precipitate forms. And, reaction equation for this is as follows.

       Ba^{2+} + SO^{2-}_{4} \rightarrow BaSO_{4}

It is given that mass (m) is 212 mg or 0.212 g (as 1 g = 1000 mg). Molecular weight of BaSO_{4} is 233.43.

Now, we will calculate the number of moles as follows.

  No. of moles = mass × M.W

                        = \frac{0.212}{233.43}

                        = 0.00091 mol of BaSO_{4}

Hence, it means that 0.00091 mol of Ba^{2+}. Now, we will calculate the mass as follows.

       Mass = moles × MW

                 = 0.00091 \times 137.327

                 = 0.124 grams or 124 mg of barium

Thus, we can conclude that mass of barium into the original solution is 124 mg.

8 0
3 years ago
Write the formula of the conjugate base of the Brønsted-Lowry acic, HF​
alexdok [17]

Answer:

Furthermore, because hydrofluoric acid, HF, loses a proton, H+1, to generate its conjugate in the reaction that is shown above, this reactant can be classified as a Brønsted-Lowry acid, and, consequently, the fluoride ion, F–1, is the conjugate base of this acid.

Explanation:

hope this helps

5 0
3 years ago
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