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
Wittaler [7]
3 years ago
7

When compounds form, which of the following statements is true about the elements that form them?

Chemistry
1 answer:
Greeley [361]3 years ago
8 0

Answer:

C. Their properties change completely.

Explanation:

The electron configurations of the elements show a periodic variation with increasing atomic number. Consequently, there are also periodic variations in physical and chemical behavior.  

When atoms interact to form a chemical bond, they combine in order to <u>achieve a more stable electron configuration.</u> As a consequence, the compounds formed exhibit completely different properties.

For example, when solid magnesium burns in air, it forms both magnesium oxide and magnesium nitride, which are gases.

You might be interested in
Guys what is valency in chemistry please I need help I will give brainlest pleaseeee help
Nutka1998 [239]

Answer:

the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.

Explanation:

3 0
3 years ago
Read 2 more answers
Which products are formed when aluminum is added to a silver chloride solution? Use the activity series below if needed. Al&gt;
kap26 [50]

Answer:

AlCl3 and Ag

Explanation:

Edge 2020

8 0
3 years ago
Read 2 more answers
C3H8(g) + 5O2(g) ⟶ 3CO2(g) + 4H2O(g) H = -2220 kJ If 865.9 g of H2O is produced during this combustion, how much heat is generat
dem82 [27]

Answer:

3 × 10⁴ kJ

Explanation:

Step 1: Write the balanced thermochemical equation

C₃H₈(g) + 5 O₂(g) ⟶ 3 CO₂(g) + 4 H₂O(g) ΔH = -2220 kJ

Step 2: Calculate the moles corresponding to 865.9 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

865.9 g × 1 mol/18.02 g = 48.05 mol

Step 3: Calculate the heat produced when 48.05 moles of H₂O are produced

According to the thermochemical equation, 2220 kJ of heat are evolved when 4 moles of H₂O are produced.

48.05 mol × 2220 kJ/4 mol = 2.667 × 10⁴ kJ ≈ 3 × 10⁴ kJ

5 0
2 years ago
X2o3 express you answer as a whole number
kobusy [5.1K]
 <span>2.40 - 1.68 =0.72 g of oxigen 
moles = 0.72/16 g/mol=0.045 

moles x = 1.68/ 55.9=0.03 

0.03/0.03 = 1 = x 
0.045 / 0.03 = 1.5 = O 

to get whole numbers multiply by 2 

x2O3 

X2O3 +3 CO = 2 X + 3 CO2</span>
4 0
3 years ago
The variable that is observed during an experiment is called what type of variable?
professor190 [17]
The one that is observed or measured in the experiment, and it is known as the dependent variable. 
8 0
3 years ago
Read 2 more answers
Other questions:
  • A) For the following reaction, K &gt; 1. Classify each of the reactants and products based on their strength as Bronsted-Lowry a
    6·1 answer
  • What are some interesting facts about Dmitri Mendeleev?
    9·1 answer
  • one side of a cube measures 0.53 cm. the mass of the cube is 0.92 g. what is the density of the cube
    7·1 answer
  • What is necessary in order to build an ionic compound?
    10·1 answer
  • Name the type of equation shown here:
    15·2 answers
  • The chemical equation for a reaction between K2Cr2O7 and HCl is shown. K2Cr2O7 + 14HCl → 2CrCl3 + 2KCl + 3Cl2 + 7H2O
    12·1 answer
  • The standard cell potential, E°cell, for a reaction in which two electrons are transferred between the reactants is +1.33 V. Cal
    7·1 answer
  • Carbon burns in the presence of oxygen to give carbon dioxide. Which chemical equation describes this reaction?
    15·1 answer
  • 1. Identify the atom in that has the greater ionization energy.<br> A. Calcium Ca<br> B. Barium Ba
    6·2 answers
  • Clo3− draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show t
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!