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
mina [271]
2 years ago
8

Answer pls pls plss this is my mock

Chemistry
1 answer:
Serggg [28]2 years ago
4 0

Answer:

if this is a mock then just guess

Explanation:

You might be interested in
Hydrogen atoms in a discharge tube are in their ground state. If a beam of free electrons of energy12.9 eV are fired at the hydr
defon

Answer:

See explanation

Explanation:

-0.7ev = -13.6/n^2

n= 4

4--->1

4--->3, 3---> 2, 2--->1

E4-E1= -13.36(1/4^2 - 1/1^2) = 12.53 eV

E4-E3 = -13.36 (1/4^2 - 1/3^2) = 0.65 ev

E3-E2 = -13.36 (1/3^2 - 1/2^2) = 1.86 eV

E2- E1 = -13.6 ( 1/2^2 - 1/1^2) = 10.02 ev

a)

λ= 6.6 × 10^-34 × 3 × 10^8/12.53 × 1.6 × 10^-19

λ= 19.8 × 10^-26/20.048 ×10^-19

λ= 9.9 × 10^ -8 m

b)

λ= 6.6 × 10^-34 × 3 × 10^8/0.65 × 1.6 × 10^-19

λ= 19.8 × 10^-26/1.04 ×10^-19

λ= 19.0 × 10^ -7 m

3 0
3 years ago
What is the name of the compound with the formula NH HCO3 ?
svet-max [94.6K]

Answer:

Acid ammonium carbonate // Ammonium bicarbonate.

Explanation:

Hello, a 4 is missing in the fist H, thus:

NH_4HCO_3

The presence of the hydrogen between the ammonium and the carbonates characterizes the salt as an acid salt, so you could name it as acid ammonium carbonate or ammonium bicarbonate (similar to the sodium bicarbonate which is NaHCO_3).

Best regards.

6 0
2 years ago
When a boron atom loses its valence electrons, what is the formula for the resulting ion?
kirill [66]

Answer:

option b. B3+

Explanation:

Boron takes the 5th position on the periodic table, therefore it has 5 electrons....2 on the inside and 3 on the outside. when it lost it 3 external electrons, it become positively charged with the amount of electron it loses.

8 0
2 years ago
Read 2 more answers
Which best explains why a scientist would share these details in a conference?
algol13
What details? I need more information than that

5 0
3 years ago
Please help me ASAP!!!!!!!!!
padilas [110]

Explanation:

chemical analysis of a compound shows that it contains 0.99g lead ,0.154g sulfur and 0.306g oxygen. what is the empirical formula of the compound.

6 0
2 years ago
Other questions:
  • What is the numerical value of Avogadro's number?
    8·1 answer
  • Evidence shows that interstellar bodies are moving away from Earth, some faster than others, which BEST suggests that the univer
    15·2 answers
  • In a certain experiment 10.0g of magnesium nitride is allowed to react with 5.00 g of water. Calculate the final mass of ammonia
    8·1 answer
  • What’s the percent composition of each element in strontium carbonate.
    14·2 answers
  • 2. In our bodies, carbon dioxode
    12·1 answer
  • La massa d'una molècula de glucosa (C6H12O6) és:
    8·1 answer
  • Which is an example of a chemical reaction?
    10·1 answer
  • How much heat is required to convert 2.73 g g of water at 32.0 ∘ C ∘C to steam at 100.0 ∘ C ∘C ? (Δ H vap ( H 2 O)=40.7kJ/mol,He
    10·2 answers
  • Gallium (, ) is a metalloid obtained from its salts during the smelting of ores of other elements, like Zinc. has broad applicab
    7·1 answer
  • Please help I don’t know this question )): thank you !!(:p
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!