Saturday

November 29, 2014

November 29, 2014

Posted by **Hannah** on Sunday, September 11, 2011 at 6:25pm.

I know that 10^9 is pm or is it -9??

- Math(Please help) -
**bobpursley**, Sunday, September 11, 2011 at 6:33pmpm is a very small unit, smaller than a head lice. 1 m=10^9 pm, which is the same as 1pm is 10^-9 m

numberatoms*diatmeter atom=1.4mm

numberatoms*131pm=1.4mm

change both to m

numberatoms*131pm*1m/10^9pm)=1.4mm(1m/10^3mm)

number atoms= 1.4*10^9/(131*10^3)

number atoms=1.4 (10^6)/131=1.07*10^4

check that.

**Answer this Question**

**Related Questions**

chemistry - The radius of a niobium atom is 131 pm. How many niobium atoms ...

Chemisty - The mass of a single niobium atom is 1.54E-22 grams. How many niobium...

chemistry - The radius of a strontium atom is 215 pm. How many strontium atoms ...

chemistry - The radius of a aluminum atom is 143 pm. How many aluminum atoms ...

Chemistry - The radius of a chromium atom is 125 pm. How many chromium atoms ...

Chemisty - The radius of a chromium atom is 125 pm. How many chromium atoms ...

Chemisty - The radius of a lead atom is 175 pm. How many lead atoms would have ...

chemistry - The radius of a barium atom is 217 pm. How many barium atoms would ...

Chemistry - The radius of a lead atom is 175 pm. How many lead atoms would have ...

Chemisty - The volume of a single niobium atom is 9.46E-24 cm3. What is the ...