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lapo4ka [179]
3 years ago
12

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large

Chemistry
1 answer:
Brilliant_brown [7]3 years ago
3 0

Answer:

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large

deposit of dust that contained substances only found in asteroids, What most likely killed off the dinosaurs?

Explanation:

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A 24.00 mL sample of a solution of Pb(ClO3)2 was diluted with water to 52.00 mL. A 17.00 mL sample of the dilute solution was fo
klio [65]

Answer:

0.238 M

Explanation:

A 17.00 mL sample of the dilute solution was found to contain 0.220 M ClO₃⁻(aq). The concentration is an intensive property, so the concentration in the 52.00 mL is also 0.220 M ClO₃⁻(aq). We can find the initial concentration of ClO₃⁻ using the dilution rule.

C₁.V₁ = C₂.V₂

C₁ × 24.00 mL = 0.220 M × 52.00 mL

C₁ = 0.477 M

The concentration of Pb(ClO₃)₂ is:

\frac{0.477molClO_{3}^{-} }{L} \times \frac{1molPb(ClO_{3})_{2}}{2molClO_{3}^{-}} =0.238M

4 0
3 years ago
What is the mass of an object with an acceleration of 10 meters per second and a force of 90 newtons?
fenix001 [56]

Answer:

9kg

Explanation:

According to Newton's second law, Force=Mass x Acceleration.

Since we have the Force and the Acceleration, we can plug the values in and solve for mass using this equation:

90N = Mass x 10m/s

Divide both sides by 10:

90/10=Mass x 10/10

Mass = 9

The Mass of the object is 9kg.

Hope this helped!

7 0
4 years ago
Which one of the following substances is a liquid fuel used in rocket engines?
kotegsom [21]

Must be C because the liquid fuel is Codium nitrate to be used in rocket engines

6 0
3 years ago
Read 2 more answers
Arrange the following elements in order from lowest to highest first ionization energy : , Ar , Cs, Na *
Sauron [17]
Lowest Cs, Na, highest is At
6 0
3 years ago
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What is the density of a substance with a mass of 0.0450 and a volume of 26.4?
Tanya [424]

Answer:

density \:  =  \frac{mass}{volume}  \\  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  =  \frac{0.0450}{26.4}  \\  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \: = 0.0017 \\

Explanation:

plz....

Mark it as a brilliant answer

7 0
4 years ago
Read 2 more answers
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