IDNStudy.com, ang iyong pangunahing mapagkukunan para sa mga sagot ng eksperto. Tuklasin ang malawak na hanay ng mga paksa at makahanap ng maaasahang sagot mula sa mga bihasang miyembro ng aming komunidad.

1. Suppose there are 602 000 000 000 000 000 000 atoms in one mole of

hydrogen, how many atoms are there in 7 moles of hydrogen? To avoid too

much space, write your answer in scientific notation.

2. A light year is the distance that light travels in a year. It is approximately

9 460 800 000 km. If it takes about 3 years for light to travel from a certain star to

Earth, how many kilometers is this star from Earth?​


Sagot :

Answer:

1.

[tex](6.02 \times 10 {}^{20})(7) = 4214000000000000000000[/tex]

[tex](6.02 \times 10 {}^{20})(7) = 4214000000000000000000[/tex]Scientific notation:4.214x10²¹

2.

[tex](9.4608 × 10 {}^{9} )(3) = 28382400000[/tex]

Scientific notation:2.83824 × 10¹

Step-by-step explanation:

  1. There are 4214000000000000000000 atoms in 7 moles
  2. There are 28382400000 km this star far from the earth