An element x has two naturally occurring isotopes: x-35 (abundance = 75.77%, mass = 34.968852 amu) and x-37 (abundance = 24.23%, mass = 36.965903 amu).

calculate the weighted atomic mass of x. also, identify the unknown element.

a) 39.948 amu argon
b) 35.453 amu chlorine
c) 79.904 amu bromine
d) 32.066 amu sulfur

x = 35.453 amu.  CHLORINE

Explanation:

Abundance of X³⁵ = 75.77%

Abundance of X³⁷ = 24.23%

Atomic mass of X³⁵ = 34.968852 amu

Atomic mass of X³⁷ = 36.965903 amu

Average atomic mass = ?

Solution:

Average atomic mass of carbon = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass of carbon = (34.968852 × 75.77)+(36.965903 ×24.23) /100

Average atomic mass of carbon=  2649.59 + 895.684 / 100

Average atomic mass of carbon = 3545.274 / 100

Average atomic mass of carbon = 35.453 amu.

x = 35.453 amu.  CHLORINE

the answer would be a

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them