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3 years ago

In which medium would light have the longest wavelength? water air glass diamond

Chemistry

2 answers:

Mnenie [13.5K]3 years ago

8 0

the answer is b air

Andru [333]3 years ago

4 0

I think the correct answer is air!

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The literature value of the atomic mass of an isotope of nickel is 57.9 g/mol. If a laboratory experimenter determined the mass

trapecia [35]

Answer:

17%

Explanation:

Given parameters:

Atomic mass of nickel isotope = 57.9g/mol

Experimental value of atomic mass = 59.6g/mol

Unknown:

Percentage error in the measurement.

Solution:

The percentage error shows how much uncertainty was introduced into a measurement. To calculate this, we simply use the expression below:

Percentage error = $\frac{Approximate atomic mass from expriment - actual atomic mass}{actural atomic mass} x 100$

Percentage error = $\frac{59.6-57.9}{57.9}$ x 100 = 17%

3 0

4 years ago

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:

KATRIN_1 [288]

Answer: $MgS$ , $MgBr_2$ , $V_2S_5$ and $VBr_5$ are four binary ionic compounds that could be formed.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Mg is having an oxidation state of +2 called as $Mg^{2+}$ cation and $S^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MgS$ . Also $Mg^{2+}$ cation and $Br^{-}$ can combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MgBr_2$ .

Also Vanadium is having an oxidation state of +5 called as $V^{5+}$ cation and $S^{2-}$ is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $V_2S_5$ . Also $V^{5+}$ cation and $Br^{-}$ anion can combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $VBr_5$ .

3 0

3 years ago

Which observation illustrates the law of conservation of mass?

ludmilkaskok [199]

I think the correct answer among the choices listed above is the second option. The observation which illustrates the law of conservation of mass is that wh<span>en 3 g of carbon reacts with 8 g of oxygen, 11 g of carbon dioxide is produced. Other choices doesn't shows that mass in is equal to the mass out.</span>

7 0

4 years ago

How many atoms are in 80.45 g of magnesium with explanation

oksian1 [2.3K]

Answer:

There are 1.9926 * 10 ^24 atoms.

Explanation:

M ( Mg ) = 80.45 g

We can find the molar mass of magnesium in the Periodic table:

M ( Mg ) = 24.31 g / mole

n = 80.45 g : 24.31 g/mole = 3.31 moles

N a ( Avogadro`s constant ) = 6.02 * 10 ^23

N = Na * n = 6.02 * 10 ^24 * 3.31 = 19.926 * 10 ^23

8 0

2 years ago

If you have a gold coin that contains 0.637 moles of gold, how many grams of gold does it contain?

mario62 [17]

The answer is 5 gold token from Chuck E. Cheese

8 0

3 years ago