A car travels 65 miles in 1 hour. What is the average speed of the car?

Chemistry

1 answer:

ohaa [14]3 years ago

3 0

It would be 65 miles per hour

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A radioisotope decays to give an alpha particle andPb-208.

oee [108]

Answer: The original element is $_{84}^{212}\textrm{Po}$

Explanation:

Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units.

The released alpha particle is also known as helium nucleus.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha$

For the given alpha decay process of an isotope:

$^{Z}_{A}\textrm{X}\rightarrow ^{208}_{82}\textrm{Pb}+_2^4\alpha$

To calculate A:

Total mass on reactant side = total mass on product side

A = 208 + 4

A = 212

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

Z = 82 + 2

Z = 84

The isotopic symbol of unknown element is $_{84}^{212}\textrm{Po}$

Hence, the original element is $_{84}^{212}\textrm{Po}$

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3 years ago

Riley is scootering down the street before they come to a stop at a stop

11111nata11111 [884]

Answer:

just subrracted them and find out whats m

Explanation:

6 0

3 years ago

Which is more stable, half filled or full filled? Why?

lorasvet [3.4K]

subshells have two reasons of stability-
 1) half filled and full filled subshells lead to symmetry as symmetry always increases stability in the nature.
2) in half filled and full filled subshells there are maximum no Of exchanges so exchanges releases energy so it increase stability.. Exchange of e-s also can b understood as delocalization of e-s which is similar like resonance and resonance always increases stability

5 0

3 years ago

Find the mass of the cone using the triple beam balance. a. 543.0 g b. 542.0 g c. 504.28 g d. 502.8 g Please select the best ans

Tcecarenko [31]

Answer: B got it correct

Explanation:

6 0

3 years ago

Read 2 more answers

Please help I will reward brainly

cupoosta [38]

The answer is glycolsis, I'm pretty sure.