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3 years ago

What is the difference between a stable and unstable isotope

Chemistry

1 answer:

USPshnik [31]3 years ago

8 0

Stable isotopes are not radioactive nor dangerous.

Unstable isostopes are radioactive and have different mass of the element.

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Ferrophosphorus (Fe2P) reacts with pyrite (FeS2) producing iron(II) sulfide and a compound that is 27.87% P and 72.13% S by mass

k0ka [10]

Answer:

The molecular formula of the compound = $P_4S_{10}$

The empirical formula of the compound = $P_2S_{5}$

The balanced chemical equation for this reaction:

$4Fe_2P+18FeS_2\rightarrow 26FeS+P_4S_{10}$

Explanation:

Compound that is 27.87% P and 72.13% S by mass and has a molar mass of 444.56 g/mol.

Molar mass of compound = 444.56 g/mol

Number of phosphorus atom = x

Number of sulfur atom = y

Atomic mass of phosphorus 31 g/mol

Atomic mass of sulfur = 32 g/mol

Percentage of element in compound :

$=\frac{\text{number of atoms}\times text{Atomic mass}}{\text{molar mas of compound}}\times 100$

Phosphorus :

$27.87\%=\frac{x\times 31 g/mol}{444.56 g/mol}\times 100$

x = 4

Sulfur :

$72.13\%=\frac{y\times 32 g/mol}{444.56 g/mol}\times 100$

y = 10

The molecular formula of the compound = $P_4S_{10}$

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The empirical formula of the compound = $P_2S_{5}$

The balanced chemical equation for this reaction:

$4Fe_2P+18FeS_2\rightarrow 26FeS+P_4S_{10}$

8 0

4 years ago

Strontium combines with bromine to form strontium bromide.What happens to the electrons in the outer levels when strontium atoms

Nataly [62]

Answer:

Im bad at these questions but i think the answer is SrBr2

Explanation:

8 0

3 years ago

What important chemical reaction stores energy

Evgesh-ka [11]

Answer: A chemical reaction that stores energy is called an endothermic reaction. More energy might be released as products form than the energy needed to break the reactants apart.

Explanation:

7 0

3 years ago

ethanol is a common laboratory solvent and has a density of 0.789 g/mL. what is the mass, in grams, of 151 mL of ethanol

natta225 [31]

V = 151 mL = 151 cm³
d = 0,789 g/mL = 0,789 g/cm³
--------------------------------------

d = m/V
m = d×V
m = 0,789×151
m = 119,139g

3 0

4 years ago

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The degree of polarity of a covalent bond between two atoms is determined by calculating the difference in their

Y_Kistochka [10]

Answer:

C) electronegativities

Explanation:

there is an electronegativity chart that will tell you the charge, then you can subtract between the two and use cut offs for the values to see if you have an ionic, polar covalent, or non polar covalent bond

3 0

3 years ago

Read 2 more answers