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
JulijaS [17]
3 years ago
14

With the atomic number 1 and an atomic mass of 1.0079, hydrogen has _________.

Chemistry
2 answers:
FinnZ [79.3K]3 years ago
8 0
Energy levels for 1.
xz_007 [3.2K]3 years ago
6 0

Answer: A-2 energy levels

Explanation:

Sorry if i’m wrong

You might be interested in
What are the periodic trends of ionic radii? Check all that apply.
Troyanec [42]
Atomic radii increase when going down a group and decreases when going towards the anion periods. So A and D.
6 0
3 years ago
Read 2 more answers
Consider the titration of 1L of 0.36 M NH3 (Kb=1.8x10−5) with 0.74 M HCl. What is the pH at the equivalence point of the titrati
worty [1.4K]

Answer:

C

Explanation:

The question asks to calculate the pH at equivalence point of the titration between ammonia and hydrochloric acid

Firstly, we write the equation of reaction between ammonia and hydrochloric acid.

NH3(aq)+HCl(aq)→NH4Cl(aq)

Ionically:

HCl + NH3 ---> NH4  +  Cl-

Firstly, we calculate the number of moles of  the ammonia  as follows:

from c = n/v and thus, n = cv = 0.36 × 1 = 0.36 moles

At the equivalence point, there is equal number of moles of ammonia and HCl.

Hence, volume of HCl = number of moles/molarity of HCl = 0.36/0.74 = 0.486L

Hence, the total volume of solution will be 1 + 0.486 = 1.486L

Now, we calculate the concentration of the ammonium ions = 0.36/1.486 = 0.242M

An ICE TABLE IS USED TO FIND THE CONCENTRATION OF THE HYDROXONIUM ION(H3O+). ICE STANDS FOR INITIAL, CHANGE AND EQUILIBRIUM.

                 NH4+      H2O     ⇄  NH3        H3O+

I                0.242                           0             0

C                 -X                              +x              +X

E             0.242-X                          X              X

Since the question provides us with the base dissociation constant value K b, we can calculate the acid dissociation constant value Ka

To find this, we use the mathematical equation below

K a ⋅ K b    = K w

 

, where  K w- the self-ionization constant of water, equal to  

10 ^-14  at room temperature

This means that you have

K a = K w.K b   = 10 ^− 14 /1.8 * 10^-5 =  5.56 * 10^-10

Ka = [NH3][H3O+]/[NH4+]

= x * x/(0.242-x)

Since the value of Ka is small, we can say that 0.242-x ≈  0.242

Hence, K a = x^2/0.242 = 5.56 * 10^-10

x^2 = 0.242 * 5.56 * 10^-10 = 1.35 * 10^-10

x = 0.00001161895

[H3O+] = 0.00001161895

pH = -log[H3O+]

pH = -log[0.00001161895 ] = 4.94

7 0
3 years ago
Which formula is a molecular compound?<br><br> H2O2<br> CaO<br> MgS<br> NaCl
Alborosie

Answer:

H2O2

Explanation:

8 0
3 years ago
Read 2 more answers
A group of students is investigating whether copper is a better thermal conductor than aluminum. The students take a copper wire
Verizon [17]
The independent variables are the copper and aluminum wires.
6 0
3 years ago
Read 2 more answers
Write a balanced chemical equation for the photosynthesis reaction in which gaseous carbon dioxide and liquid water react in the
sasho [114]
6 CO₂ + 6 H₂O (chlorophyll + sunlight) ⇒ C₆H₁₂O₆ + 6 O₂ 
the reaction takes place in presence of sunlight and chlorophyll .. 
CO₂ is oxidized and forms Glucose . And oxygen is evolved in this process. 

3 0
3 years ago
Other questions:
  • In step 6, khp was dissolved in a trivial amount of deionized h2o prior to titration with naoh. why was it acceptable to use an
    7·1 answer
  • The solubility of silver chloride can be increased by dissolving it in a solution containing ammonia. agcl (s) ag+ (aq) + cl- (a
    7·2 answers
  • Which BEST describes how an experiment should be designed?
    8·1 answer
  • Anthracite is so hard and pure it is also referred to as a _____.
    10·1 answer
  • Ammonia and gaseous hydrogen chloride combine to form ammonium chloride. NH3+HCL-&gt;NH4CL
    10·1 answer
  • The strong nuclear force is always smaller then the electrostatic force true or false
    8·2 answers
  • Glven 4.62 mol of sodium hydroxide, NaOH, how many grams are present?
    8·1 answer
  • Calculate the volume of an object with dimensions measuring 3.o cm x 4.0 cm x 1.0 cm<br> ?cm^3
    6·1 answer
  • What are rotation and revolution and how do they affect Earth?
    10·1 answer
  • What is a water cycle​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!