4 years ago

How many significant digits are in 12,003,000 A) 8 B) 5 C) 6 D) 3

1 answer:

Ksju [112]4 years ago

5 0

Answer:5

Explann:

I've actually not learnt it but i can solve other questions under Maths

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Simora [160]

Answer:

ty :D

Explanation:

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3 years ago

Elan Coil [88]

Answer:

Explanation:

all the atoms must be balanced.

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3 years ago

Temka [501]

True, H2O is a compound with 2 hydrogens and one oxygen

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3 years ago

Readme [11.4K]

Answer:

$24.9~g/cm^3$

Explanation:

Density is found dividing mass by volume. In this case, we treat krypton as a sphere having a volume of $V = \dfrac{4}{3}\pi r^3$ . Given:

$m = 1.39\cdot 10^{-22}~g$

$r = 110 pm = 1.10\cdot 10^{-8}~cm$

We obtain density of:

$d = \dfrac{m}{V} = \dfrac{m}{\dfrac{4}{3}\pi r^3} = \dfrac{3m}{4\pi r^3}$

$d = \dfrac{3\cdot 1.39\cdot 10^{-22}~g}{4\pi\cdot (1.10\cdot 10^{-8}~cm)^3} = 24.9~g/cm^3$

This is not a feasible value for a gas like krypton, its radius is actually not 110 pm.

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3 years ago

Y_Kistochka [10]

They both skip the liquid phase obviously xdxdxd

4 0

3 years ago