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# 4. Convert 2.3 x 10-2 GBq to mCi. I got the answer 8.51E-4 Is this correct? Please explain conversion.?

### 3 Answers

- Anonymous2 months ago
“Convert 2.3*10^-2 GBq to mCi.

I got the answer 8.51E-4 Is this correct?”

It can’t be correct because the value supplied is only 2 significant figures, so the answer can’t have 3 significant figures.

The basic relationship between the curie (Ci) and the becquerel (Bq) is:

1Ci = 3.7x10^10 Bq (definition)

You should be given this fact, or you need to look it up.

Giga (G) means 10^9 and milli (m) means 10^-3 so we can express the definition as:

37GBq = 1000 mCi

One way to proceed is as follows:

Divide both sides by 37:

1GBq = (1000/37) mCi

Multiply both sides by 2.3*10^-2:

2.3*10^-2 GBq = 2.3*10^-2 * (1000/37) mCi

. . . . . . . . . . . . .= 0.62 mCi to 2 sig. figs.

- Old Science GuyLv 72 months ago
2.3E-2 GBq * 27.027 mCi/GBq = 0.62162 mCi

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- billrussell42Lv 72 months ago
no

2.3 x 10-2 GBq = 23-2 GBq = 21 GBq

please learn correct terminology.

1 Bq = 2.703×10^(−11) Ci ≅ 27 pCi

21 GBq = 21e9 Bq

21e9 Bq x 27e-12 Ci/Bq = 567e-3 Ci = 567 mCi