How many microcuries are equivalent to 250 kilobecquerels?

How many microcuries are equivalent to 250 kilobecquerels?

• A. 0.25 uCi
• B. 0.55 uCi
• C. 6.76 uCi
• D. 9.25 uCi

Answer: (C)

To determine how many microcuries are equivalent to 250 kilobecquerels, it's important to understand the conversion between becquerels, curies, and microcuries. One curie (Ci) is equal to 3.7 × 10^10 decays per second, and one microcurie (uCi) is one-millionth of a curie, or 3.7 × 10^4 decays per second. On the other hand, one kilobecquerel (kBq) is equal to 1,000 decays per second. Therefore, converting kilobecquerels to microcuries involves the following steps: 1. Convert kilobecquerels to becquerels: - 250 kBq = 250,000 Bq (since 1 kBq = 1,000 Bq). 2. Convert becquerels to curies: - 250,000 Bq ÷ 3.7 × 10^10 Bq/Ci = approximately 6.76 × 10^-6 Ci. 3. Convert curies to microcuries: - 6.76 × 10^-6 Ci x

To determine how many microcuries are equivalent to 250 kilobecquerels, it's important to understand the conversion between becquerels, curies, and microcuries.

One curie (Ci) is equal to 3.7 × 10^10 decays per second, and one microcurie (uCi) is one-millionth of a curie, or 3.7 × 10^4 decays per second. On the other hand, one kilobecquerel (kBq) is equal to 1,000 decays per second.

Therefore, converting kilobecquerels to microcuries involves the following steps:

1. Convert kilobecquerels to becquerels:

• 250 kBq = 250,000 Bq (since 1 kBq = 1,000 Bq).

2. Convert becquerels to curies:

• 250,000 Bq ÷ 3.7 × 10^10 Bq/Ci = approximately 6.76 × 10^-6 Ci.

3. Convert curies to microcuries:

• 6.76 × 10^-6 Ci x