3 years ago

Diffrent between bryophytes and pteriodphytes

1 answer:

Pie3 years ago

4 0

I would help if i could im sorry im sure someone else will answer soon im honestly trying to help as many people as i can

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If a sample of hydrogen gas was collected over water. If the total pressure 7 points

ludmilkaskok [199]

Answer:

53.3

Explanation:

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3 years ago

1 mole = _____________________ _________________ particles

Artist 52 [7]

1 mole = 6.02 * 10^23 atoms

This is known as Avogadro's Number. This value is approximate.

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How many protons electrons and neutrons respectively does 29 CS have

irakobra [83]

$55 \; \text{e}^{-}$ , $55 \; \text{p}^{+}$ , and $74 \; \text{n}^{0}$ - in case cesium-129 is what you were referring to.

Cesium has atomic number $55$ as seen on a modern periodic table. A cesium atom nucleus would thus contain an equal number of protons; in addition to that, a <em>neutral</em> atom of cesium would contain the same number of electrons in its electron cloud.

For a particular isotope,

$\text{Mass number} = \text{Number of protons per nuclei} + \text{Number of Neutrons per nuclei}$ .

This isotope of cesium has a mass number of $129$ and contains $55$ protons in each atomic nucleus. One cesium nuclei would therefore contain $129 - 55 = 74$ neutrons.

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3 years ago

What is the mass of 1.59 moles of Ca(CIO3)2

salantis [7]

329.10 g is the mass of 1.59 moles of Ca(ClO3)2

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3 years ago

Imagine that you need to determine the number of grams of salt necessary to make 1.5 L of a 0.80 M NaCl solution.

kap26 [50]

0.80M = x/1.5L
x = 1.2 moles
1.2 moles of Na is about 27.6 grams of Na

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3 years ago