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
solniwko [45]
3 years ago
8

Which one is a true statement about endothermic reactions? a: More heat is given off than is put into the reaction. b :The react

ants have more heat energy than the products. c: The reaction container always feels hot. d: Energy is absorbed making it feel colder.
Chemistry
1 answer:
Setler [38]3 years ago
7 0
A because it gets hot
You might be interested in
Which of the following describes metallic character on the periodic table? Question 1 options: A) It increases as you move right
Ilia_Sergeevich [38]

Answer:

D

Explanation:

Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell. Metallic character increases as you move down an element group in the periodic table. This is because electrons become easier to lose as the atomic radius increases, where there is less attraction between the nucleus and the valence electrons because of the increased distance between them.

3 0
2 years ago
Sheena has a lump of sodium, a lump of potassium and a lump of lithium, but they’ve got mixed up and she doesn’t know which one
Arada [10]

Answer:

Explanation:

Just saw your request regarding answering this so here it is:

All of them belong of Group 1 in periodic table and thus are highly reactive! Pattern of reactivity for Group 1 (Alkali metals) increases as you move down the group as their radius keeps increasing and thus electrons can be easily lost. Thus, to ID the lumps, Sheena should look at their reactivity and she should get the following trend:

Most reactive: Potassium (K)

Intermediate: Sodium (Na)

Least reactive: Lithium (Li)

Hope it helps!

5 0
3 years ago
If 1 mol of XO₂ contains the same number of atoms as 60 g of XOs, what is the molar mass of XO₂?
Lena [83]

Answer:

44 grams/mole

Explanation:

<u>If 1 mol of XO₂ contains the same number of atoms as 60 g of XO3, what is the molar mass of XO₂?</u>

<u></u>

60 grams of XO3 is one mole XO3, since it has the same number of atoms as 1 mole of XO2.

Let c be the molar mass of X.  The molar mass of XO3 is comprised of:

X:  c

3O:  3 x 16 = 48

Total molar mass of XO3 is = <u>48 + c</u>

We know that the molar mass of XO3 = 60 g/mole, so:

48 + c  = 60 g/mole

c = 12 g/mole

The molar mass of XO2 would be:

1 X = 12

2 O = 32

Molar mass = 44 grams/mole, same as carbon dioxide.  Carbon's molar mass is 12 grams.

<u></u>

<u></u>

5 0
2 years ago
Saul converts 2.392 hectoliters to liters. What should his new number be?
Lostsunrise [7]
2.392 hectoliters = 239.2 liters. 1 hectoliter = 100 liters.
3 0
2 years ago
Three compounds that contain elements from Group 16 are SeO2F2 , SeOF2,
egoroff_w [7]

Answer:

A

Explanation:

A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity(Wikipedia).

The formal charge on an atom in a molecule reflects the electron count associated with the atom compared to the isolated neutral atom(University of Calgary).

Looking at all the structures listed A-E for SeO2F2, only structure A minimizes the formal charges for each atom in SeO2F2.

4 0
2 years ago
Other questions:
  • Would your results be he same if 1.5 g of barium chloride was used instead of 1.3 g? same with 0.7 g of barium chloride?
    11·1 answer
  • Using this reversible reaction, answer the following:
    5·2 answers
  • what events and experiences lead bruno to gradually give up some of his innocence and see things differently
    7·1 answer
  • In an exothermic reaction the bonding energy of the product is:
    6·2 answers
  • Is pain reliever a prescription drug?
    14·1 answer
  • The walls in your home have 25mm of expanded polystyrene (R-value 3.96) and 25mm of rigid urethane foam (R-value 7.50). What is
    11·1 answer
  • Which isotope has 30 neutrons and 32 protons
    7·1 answer
  • What determines the strength of a dipole dipole force?
    8·1 answer
  • Describe the particle mode of matter. what does the brownian motion tells us about the particles in matter?give other evidence t
    9·1 answer
  • Can someone please help me?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!