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3 years ago

Write the correct formula for each compound named below. Show the from which it is formed.

Chemistry

1 answer:

zaharov [31]3 years ago

3 0

Answer:

Explanation:

Sodium Chloride = Na⁺ + Cl⁻ = NaCl

Lithium bromide = Li⁺ + Br⁻ = LiBr

Magnesium fluoride = Mg ⁺² + F⁻ = Mg₂F.

Potassium Oxide = K⁺ + O⁻² = K₂O

Calcium sulphide = Ca⁺² + S⁻² = CaS

Aluminum Iodide = Al⁺³ + I⁻ = Al I₃

Barium bromide = Ba⁺² + Br⁻ = BaBr₂

Aluminum sulphide = Al⁺³ + S⁻ = Al₂S₃

Calcium Phosphide = Ca⁺² + P⁻³ = Ca₃P₂

Lithium Nitride = Li⁺ + N⁻³ = Li₃N

Magnesium Oxide = Mg⁺² + O⁻² = MgO

Aluminum Fluoride = Al⁺³ + F⁻ = AlF₃

Lithium Oxide = Li⁺ + O⁻² = Li₂O

Beryllium iodide = Be⁺² + I⁻ = BeI₂

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PLS HELP QUICK ALOTTT OF POINTS

timofeeve [1]

Answer:

$\boxed {\boxed {\sf 0.80 \ mol\ F}}$

Explanation:

We are asked to find how many moles are in 4.8 × 10²³ fluorine atoms. We convert atoms to moles using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of fluorine.

We will convert using dimensional analysis and set up a ratio using Avogadro's Number.

$\frac {6.022 \times 10^{23} \ atoms \ F}{ 1 \ mol \ F}$

We are converting 4.8 × 10²³ fluorine atoms to moles, so we multiply the ratio by this number.

$4.8 \times 10^{23} \ atoms \ F *\frac {6.022 \times 10^{23} \ atoms \ F}{ 1 \ mol \ F}$

Flip the ratio so the units of atoms of fluorine cancel each other out.

$4.8 \times 10^{23} \ atoms \ F *\frac { 1 \ mol \ F}{6.022 \times 10^{23} \ atoms \ F}$

$4.8 \times 10^{23} *\frac { 1 \ mol \ F}{6.022 \times 10^{23} }$

Condense into 1 fraction.

$\frac { 4.8 \times 10^{23} }{6.022 \times 10^{23} } \ mol \ F$

Divide.

$0.7970773829 \ mol \ F$

The original measurement of atoms has 2 significant figures, so our answer must have the same. For the number we found, that is the hundredths place. The 7 in the thousandths tells us to round the 9 in the hundredths place up to a 0. Then, we also have to round the 7 in the tenths place up to an 8.

$0.80 \ mol \ F$

4.8 × 10²³ fluorine atoms are equal to <u>0.80 moles of fluorine.</u>

6 0

3 years ago

Question #1: Identify the type of Mutation below

borishaifa [10]

Answer:

Deletion

Explanation:

A mutation refers to a change in the DNA sequence. This means that the original sequence of bases in the DNA has been altered permanently.

There are three types of DNA mutations; base substitutions, deletions and insertions.

In the particular case of this question, the original is TTCGATA while the copy is TTGATA. If you look closely at the two, you will notice that the C has been omitted. This is an example of deletion.

5 0

3 years ago

olya-2409 [2.1K]

B.) Because they both are Acids

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4 0

3 years ago

Read 2 more answers

A rock is an

Gekata [30.6K]

Answer:

mineral

Explanation:

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3 years ago

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An antacid tablet contains 640.0 mg of magnesium oxide per tablet.

Salsk061 [2.6K]

Answer:

317.6 mL

Explanation:

Step 1: Write the balanced neutralization equation

MgO + 2 HCl ⇒ MgCl₂ + H₂O

Step 2: Calculate the mass corresponding to 640.0 mg of MgO

The molar mass of MgO is 40.30 g/mol. The moles corresponding to 640.0 mg (0.6400 g) of MgO are:

0.6400 g × (1 mol/40.30 g) = 0.01588 mol

Step 3: Calculate the moles of HCl that react with 0.01588 moles of MgO

The molar ratio of MgO to HCl is 1:2. The moles of HCl are 2/1 × 0.01588 mol = 0.03176 mol

Step 4: Calculate the volume of 0.1000 M HCl that contains 0.03176 moles

0.03176 mol × (1 L/0.1000 mol) = 0.3176 L = 317.6 mL

3 0

3 years ago