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
Vika [28.1K]
3 years ago
9

Which group on the Periodic Table of the Elements contains elements that react with oxygen to form compounds with the general fo

rmula X2O?
(1) Group 1 (3) Group 14
(2) Group 2 (4) Group 18
Chemistry
1 answer:
user100 [1]3 years ago
6 0
Group (1) is alkali metal and its elements have 1 valence electron. Oxygen (O) valency is 2, and together they can form compounds with the general formula X2O.

Therefore, (1) Group 1 is the correct answer.

Hope this helps~
You might be interested in
HNO2+ F- <—> HF + NO2 in the reverse reaction HF is a/an
ANEK [815]
<span>In the reverse reaction HF is a reactant.</span>
8 0
3 years ago
In an exothermic reaction, chemical energy is converted to _____.
mr Goodwill [35]

Answer:

<h2>2. mechanical</h2>

Explanation:

5 0
3 years ago
Read 2 more answers
We can also use the equation for enthalpy change for physical phase changes. Consider the phase change H2O(l) → H2O(g). Calculat
VLD [36.1K]

Answer: The value of enthalpy of the given reaction is 44.000 kJ/mol , that is energy is supplied to water to change into water vapors

Explanation:

H_2O(l)\rightarrow H_2O(g),\Delta H_{rxn}=?

Enthalpy of formation of water in liquid state,\Delta H_{f,H_2O(l)}=-285.820 kJ/mol

Enthalpy of formation of water in gaseous state,\Delta H_{f,H_2O(g)}=-241.820 kJ/mol

\Delta H_{rxn}=\sum \Delta H_f \text{of products}-\sum \Delta H_f \text{of reactants}

\Delta H_{rxn}=(-241.820 kJ/mol)-(-285.820 kJ/mol)=44.000 kJ/mol

The value of enthalpy of the given reaction is 44.000 kJ/mol, that is energy is supplied to water to change into water vapors.

6 0
3 years ago
Read 2 more answers
Heat flow is the ________of energy from a waemer object to a cooler one. whats the blank??​
Romashka-Z-Leto [24]

Answer:

transfer

Explanation:

as heat flows from one object to another, the first object loses the heat(energy), while the second object gains heat(energy).

If you have any questions don't hesitate to ask :)

8 0
3 years ago
READING CHECK
Wittaler [7]
Gas particles are in constant motion, and any object in motion has kinetic energy (Ek). ... For example, in the collision of two molecules, one molecule may be deflected at a slightly higher speed and the other at a slightly lower speed, but the average kinetic energy does not change.
GIVE ME POINTSSSSSSSSSS
3 0
3 years ago
Other questions:
  • 1. Which processes are taking place in the system represented by the following equation?
    14·1 answer
  • How many atoms are in 1.50 moles of fluorine gas?
    15·2 answers
  • Can a tank of oxygen gas ever be half empty? Explain
    5·2 answers
  • Objects with higher temperatures:________________.1. emit only shortwave radiation. 2. emit most of their energy in the form of
    9·2 answers
  • How many moles of sodium bicarbonate is needed to neutralize 0.8 ml of sulphuric acid?
    8·1 answer
  • A researcher is trying to culture mouse embryonic stem cells, and is providing them with glucose (sugar) as a food source. In or
    13·1 answer
  • PLEASE SOMEONE HELP dont mind the answers in there already
    7·1 answer
  • Mr. Evans rides his bicycle an average speed of 8 km/hr. How far has he
    8·2 answers
  • Calculate the value of Delta H for the reaction CaCO3 --&gt; CO2 + CaO from the following enthalpy changes:
    10·2 answers
  • The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!