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
gogolik [260]
3 years ago
9

The elements that contain electrons in an F sublevel near the highest occupied energy level are referred to as? B WAS INCORRECT

ON THE TEST
A. Alkali metals
B. Alkali earth metals
C. transition metals
D. inner transmission levels
Chemistry
1 answer:
Ilia_Sergeevich [38]3 years ago
4 0

inner transmission levels i took the test

You might be interested in
2. An exothermic reaction releases 86.5 kJ. How many kilocalories of<br> energy are released?
Alenkasestr [34]

Answer:

20.67 kcal of energy is released.

Explanation:

It is given that, an exothermic reaction releases 86.5 kJ. We need to convet kJ to calories.  

Since,

1 kcal = 4.184  kJ

So,

1 kJ = 0.239  kcal

For 86.5 kJ,

86.5 kJ = (0.239 × 86.5) kcal

86.5 kJ = 20.67 kcal

So, 20.67 kcal of energy is released.

7 0
3 years ago
The air we breathe is a(n) _____.
ddd [48]
Gas thank me later bro
8 0
3 years ago
Read 2 more answers
The second-order rate constant for the following gas-phase reaction is 0.041 1/MLaTeX: \cdotâs. We start with 0.438 mol C2F4 in
pantera1 [17]

Answer:

134.8 seconds is the half-life (in seconds) of the reaction for the initial C_2F_4 concentration

Explanation:

Half life for second order kinetics is given by:

t_{\frac{1}{2}=\frac{1}{k\times a_0}

Integrated rate law for second order kinetics is given by:

\frac{1}{a}=kt+\frac{1}{a_0}

t_{\frac{1}{2} = half life

k = rate constant

a_0 = initial concentration

a = Final concentration of reactant after time t

We have :

C_2F_4 \longrightarrow \frac{1}{2} C_4F_8

Initial concentration of C_2F_4=[a_o]=\frac{0.438 mol}{2.42 L}=0.1810 mol/L

Rate constant = k = 0.041 M^{-1} s^{-1}

t_{\frac{1}{2}=\frac{1}{k\times a_0}

=\frac{1}{0.041 M^{-1} s^{-1}\times 0.1810 mol/L}

t_{1/2}=134.8 s

134.8 seconds is the half-life (in seconds) of the reaction for the initial C_2F_4 concentration

3 0
3 years ago
Which of the following is a nonmetal?<br> A. Cd<br> B. Te<br> C. Mg<br> D. Ne
Masja [62]
The answer is D. Ne, which stands for Neon.
4 0
4 years ago
Which balanced equation represents a phase equilibrium?
Marta_Voda [28]
(3) Cl2(g) <==> Cl2(l), because it has an equilibrium between the two phases of liquid and gas.
7 0
3 years ago
Other questions:
  • How many milliliter of 0.1M NaOH should be added to 50.0 ml of 0.1M formic acid HCOOH (Ka=1.8*10^-4), to obtain a buffer with a
    15·1 answer
  • Ethyne differs from ethene in what way? A. The carbons share three pairs of electrons in ethyne and only two pairs in ethene. B.
    11·2 answers
  • When 2 grams of Hydrogen (H2) react with 32 grams of Oxygen (O2) the reaction yields hydrogen peroxide (H2O2). How many grams of
    10·2 answers
  • For a chemical system at equilibrium, what is the concentration of both the reactants and the products
    5·1 answer
  • Determine the distance of closest approach (in fm) before the alpha particle reverses direction. Assume the lead nucleus remains
    7·1 answer
  • a sample of H2 is collected over water such that the combined hydrogen water vapor sample is held at a pressure of one standard
    11·1 answer
  • A man weighing 75 kg takes 5 minutes to reach a height of 5 m when he climbs a staircase. What is his power?
    10·1 answer
  • A device that does work with only one movement is a simple machine <br> true or false
    14·1 answer
  • Which of the following is an Alkaline Earth Metal?
    13·2 answers
  • HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!