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
finlep [7]
3 years ago
11

Taking a test,need some help please and thank you.

Chemistry
1 answer:
tiny-mole [99]3 years ago
3 0
Cumulus low altitude
You might be interested in
Using the following thermochemical data, what is the change in enthalpy for the following reaction?
Mice21 [21]
In calculating the change in enthalpy in a certain reaction, it is important to remember that it is the sum of the enthapy of formation for the substances involved in the reaction. 

<span>CaO(s)+2HCl(aq)→CaCl2(aq)+H2O(l)                          ΔH= –186kJ 
</span>Ca(OH)2(aq) →  CaO(s)+H2O(l)<span>                                     ΔH= 65.1 kJ
</span>Ca(OH)2(aq) + 2HCl(aq) → CaCl2(aq) + 2H2O(l)       ΔH= -120.9 kJ
5 0
3 years ago
La Nina tends to lead to drier, warmer weather in the southern united states, which causes drought in texas. Which of these is l
Pani-rosa [81]
C. Above Average rainfall
3 0
3 years ago
Read 2 more answers
A student made the Lewis dot diagram of a compound as shown. Mg is written with two dots shown on its top. Cl is written on the
blsea [12.9K]

Answer:

The dots were not properly located and arrows are not used in Lewis structures

Explanation:

If we intend to write a Lewis structure for a compound, that lewis structure must consist of only dots. These dots actually show the valence electrons on the outermost shell of the molecule.

We do not involve arrows when writing dot electron structures for compounds. The valence electrons of magnesium ought not to be written together because they are not a lone pair, rather they are two unpaired electrons. The use of an arrow suggests a coordinate covalent bond which is not the case here.

The correct lewis structure for MgCl2 is shown in the image attached to this answer.

7 0
3 years ago
How many electrons are in the highest occupied energy level of a neutral chlorine atom?
tino4ka555 [31]
There are seven electrons
5 0
3 years ago
Read 2 more answers
How many grams of potassium nitrate (KNO3) would form if 2.25 liters of a 1.50 molar lead nitrate Pb(NO3)2 solution reacts with
fgiga [73]
I know that the answer is 639 g
4 0
3 years ago
Other questions:
  • Can anyone help me if possible?
    5·1 answer
  • Which is the first element in the periodic table to have an electron configuration in the 4th energy level? beryllium carbon pot
    12·2 answers
  • What type of isotope undergoes radioactive decay?
    14·2 answers
  • Select the correct answer. Given the data in the table, what is the average atomic mass of chlorine? A. 34.969 amu B. 35.453 amu
    8·2 answers
  • What statement describes a good scientific question? Check all that apply.<br>Please help mee!​
    8·1 answer
  • which substance is composed of electrically neutral groups of ions that are held together by electrostatic forces?
    9·1 answer
  • During a reaction, the enthalpy of the reactants and the products are not equal. What does this result in?
    15·1 answer
  • Al colocar unos trocitos de zinc en un tubo de ensayo, agregamos 2 mL de acido clorhídrico. El Zinc sustituye el hidrogeno del a
    13·1 answer
  • How many valence electrons would atoms of the element neon have?
    12·1 answer
  • Choose one side of the debate below, and form a brief argument supporting that side.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!