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inysia [295]
3 years ago
7

A meteorite is determined to be 4.5 billion years old. It now has 78 atoms of lead-206. Assuming no loss of daughter isotopes, h

ow many atoms of uranium-238 did the meteorite have to begin with? The half-life of uranium-238 is 4.5 billion years.
a) 156
b) 312
c) 78
d) 238
Biology
1 answer:
vovangra [49]3 years ago
6 0
Given the age of the meteorite is 4.5 billion years old with 78 atoms of lead-206 the answer should be B. 156. The half-life of uranium-238 in order to decay into lead-206 is 4.46 billion years, which means that the original number of atoms is 156.  
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Vitamin C is required to produce the collagen present in the extracellular matrix.

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2 years ago
Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phago
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Answer:

opsonization.

Explanation:

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3 years ago
An important function of chlorophyll molecules during photosynthesis is
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Chlorophyll molecules allow the plant to absorb sunlight which is vital for photosynthesis

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4 years ago
When transporting food off site How should information such as use by date and time be communicated to the off site staff?
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When transporting food off site How should information such as use by date and time be communicated to the off site staff is Labels on food.

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3 0
2 years ago
List the 4 abiotic forms of nitrogen cycle and the chemical formula
weeeeeb [17]

Answer:

Four abiotic forms of nitrogen cycle and its chemical formula

Ammonium – NH^{4+}

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Explanation:

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