1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
marissa [1.9K]
2 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...
Chemistry
1 answer:
Morgarella [4.7K]2 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
Nucleolus what is a nucleolus<br><br>​
Ainat [17]

Answer:

Its a small dense spherical structure in the nucleus of a cell during interphase.

3 0
2 years ago
An investigation is conducted into how the mass of magnesium metal reacting with hydrochloric acid affects the amount of hydroge
natta225 [31]

An investigation is conducted into how the mass of magnesium metal reacting with hydrochloric acid affects the amount of hydrogen gas produced.

Masses of 0.10g, 0.20g, 0.30g and 0.40g of powdered Mg metal are reacted with hydrochloric acid(HCl). The conical flask containing the reaction mixture of Mg and HCl is connected to another conical flask with a hose. The hydrogen gas produced by the reaction is collected in this conical flask. The greater the amount of hydrogen gas produced by the reaction the greater the pressure of the gas in the flask.

Answer:

A) what is the independent variable:

B) what is the dependent variable:

C) write a hypothesis for this investigation:

D) give 2 variables that should have been controlled for this investigation:

3 0
2 years ago
Give three examples of physical change
12345 [234]
<span>crushing a can
</span><span>chopping wood
</span>shredding paper
7 0
2 years ago
Read 2 more answers
What substances react and form during oxidation
Olin [163]

Answer:

carbon dioxide and water

Explanation:

ncompletely oxidized (in this sense, oxidation means the removal of electrons or hydrogen atoms), the end product being (apart from carbon dioxide and water)

8 0
3 years ago
Methyl hydrazine (N2H3CH3) is a common liquid propellant used in rocket fuels. Look for the standard molar enthalpies of formati
AfilCa [17]

The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.

<h3>What is the standard molar enthalpy of formation?</h3>

The standard molar enthalpy of formation of a compound is defined as the enthalpy of formation of 1.0 mol of the pure compound in its stable state from the pure elements in their stable states at P = 1.0 bar at a constant temperature.

Let's consider the following equation.

4 N₂H₃CH₃(l) + 5 N₂O₄(l) → 12 H₂O(g) + 9 N₂(g) + 4 CO(g)

We can calculate the standard enthalpy of the reaction using the following expression.

ΔH° = Σnp × ΔH°f(p) - Σnr × ΔH°f(r)

where,

  • ΔH° is the standard enthalpy of the reaction.
  • n is stoichiometric coefficient.
  • ΔH°f is the standard molar enthalpy of formation.
  • p are the products.
  • r are the reactants.

ΔH° = 12 mol × ΔH°f(H₂O(g)) + 9 mol × ΔH°f(N₂(g)) + 4 mol × ΔH°f(CO(g)) - 4 mol × ΔH°f(N₂H₃CH₃(l)) - 5 mol × ΔH°f(N₂O₄(l))

ΔH° = 12 mol × (-241.81 kJ/mol) + 9 mol × (0 kJ/mol) + 4 mol × (-110.53 kJ/mol) - 4 mol × (54.20 kJ/mol) - 5 mol × (-19.56 kJ/mol)

ΔH° = -3462.84 kJ

In the balanced equation, there are 4 moles of N₂H₃CH₃. The standard enthalpy of reaction per mole of N₂H₃CH₃ is:

-3462.84 kJ / 4 mol = -865.71 kJ/mol

The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.

Learn more about enthalpy here: brainly.com/question/11628413

4 0
2 years ago
Other questions:
  • Which of the following is a chemical change? Explain your reasoning: (a) boiling canned soup; (b) toasting a slice of bread; (c)
    13·1 answer
  • Which statement concerning elements is true?
    11·1 answer
  • a photon of light has a frequency of 3.5 x 10 to the 14th Hertz what is the wavelength of this light what color is this late
    10·1 answer
  • Jose’s lab instructor gives him a solution of sodium phosphate that is buffered to a pH of 4. Because of an error that he made w
    11·1 answer
  • Which is true of a liquid?
    13·1 answer
  • When The appearance of a system changes does the mass of the system also change why why not
    14·2 answers
  • PLEASE HELP ILL GIVE BRAINLIST‼️‼️‼️‼️
    9·2 answers
  • Write the equilibrium expression of each chemical equation.<br> 2H2S(g) 2H2(g) + S2(g)
    8·1 answer
  • What is mole concept? how to do its numericals​
    12·1 answer
  • What mass will 33.6 L of chlorine gas (Cl2) have at STP?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!