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4 years ago

14

What is the building block of matter :(?

1 answer:

natta225 [31]4 years ago

7 0

The building block of matter are atoms

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Match each scientist to their discovery regarding the atom

neonofarm [45]

Answer:

Thomson--atoms cotain electron

Ernest Rutherford--atoms have a positive nucleus

R.A Millikan--electrons have Q=-1

Dalton--atoms are indivisible

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3 years ago

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4. Which of the following statements

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Answer:

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A(n)____is the smallest particle of an element that has the chemical properties of that element.

AnnyKZ [126]

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Atom

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4 years ago

What happens to the sound wave in echolocation?

Andrei [34K]

Answer: Reflected :)

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4 years ago

What is the mass percentage of oxygen in Ba3(PO4)2? Please help how do I go about figuring this out?

Mice21 [21]

Molecular Mass of Compound.

$\\ \sf\longmapsto Ba_3(PO_4)_2$

$\\ \sf\longmapsto 3(137u)+2(39u+4(16u))$

$\\ \sf\longmapsto 411u+2(39u+64u)$

$\\ \sf\longmapsto 411u+2(103u)$

$\\ \sf\longmapsto 411u+206u$

$\\ \sf\longmapsto 617u$

Molecular mass of O in compound=16(4)=64u

$\\ \sf\longmapsto Mass\%\:of\:O$

$\\ \sf\longmapsto \dfrac{64}{617}\times 100$

$\\ \sf\longmapsto \dfrac{6400}{617}$

$\\ \sf\longmapsto 10.3\%$

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3 years ago