Ask question

Ask question

All categories

3 years ago

11

Determine whether the given compound name or formula contains a polyatomic ion. N H 4 C l Choose... Magnesium sulfate Choose...

Sodium phosphide Choose... S O 3 Choose... Calcium hydroxide Choose... K C N Choose...

1 answer:

Morgarella [4.7K]3 years ago

4 0

Answer:

NH₄Cl, Magnesium sulfate, KCN

Explanation:

Determine whether the given compound name or formula contains a polyatomic ion.

NH₄Cl. YES. It contains the polyatomic ion ammonium NH₄⁺.

Magnesium sulfate. YES. It contains the polyatomic ion sulfate SO₄²⁻.

Sodium phosphide Na₃P. NO.

SO₃. NO.

Calcium hydroxide Ca(OH)₂. NO.

KCN. YES. It contains the polyatomic ion cyanide CN⁻.

You might be interested in

Compare the electronegativity of H and O in the polar covalent bonds of a water

ExtremeBDS [4]

Answer:

The O atom will tend to attract the electrons.

Explanation:

The electronegativity of O (3.5) is much higher than H (2.1), which means it is more likely to attract electrons. The higher the electronegativity, the more attractive.

7 0

3 years ago

A 2.241-g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide.

nlexa [21]

Answer:

The empirical formula is = $NiO$

Explanation:

Given that:- Mass of nickel = 2.241 g

Mass of the oxide formed = 2.852 g

Mass of the oxygen reacted = Mass of the oxide formed - Mass of nickel = 2.852 g - 2.241 g = 0.611 g

Molar mass of nickel = 58.6934 g/mol

Moles of nickel = $\frac{2.241}{58.6934}\ mol$ = 0.03818 mol

Molar mass of oxygen = 15.999 g/mol

Moles of nickel = $\frac{0.611}{15.999}\ mol$ = 0.03818 mol

Taking the simplest ratio for Ni and O as:

0.03818 : 0.03818 = 1 : 1

<u>The empirical formula is = $NiO$ </u>

4 0

3 years ago

Someone said that we can not use sulfric acid to prepare PbSO4 .

Delvig [45]

Answer:

A. we can use sulfuric acid to prepare PbSO4

7 0

3 years ago

Read 2 more answers

A chemical change is like a physical change because no new substance is formed. Agree or DIsagree and reason why

aleksandrvk [35]

I disagree, because a physical change changes the form, and a chemical change is a process where one or more substances are altered into new substances.

5 0

3 years ago

Calculate the formula unit mass of CaCl2

melomori [17]

Formula unit mass is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the empirical formula of a compound. It is expressed in amu.

Atomic mass of calcium = 40 amu

Atomic mass of chlorine = 35.5 amu

Formula mass of CaCl2 = (1 x 40) + (2 x 35.5) = 111amu.

3 0

3 years ago