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
REY [17]
3 years ago
10

Potassium loses electrons when it reacts with oxygen. Which statement is true of potassium in this reaction? A. It reduces. B. I

t undergoes synthesis. C. It undergoes redox. D. It oxidizes​
Physics
1 answer:
allochka39001 [22]3 years ago
5 0
<h2>Answer:</h2>

[D] It oxidizes.

4K + O2 → 2K2O, <u>potassium oxide</u> is produce.

We have the equation, in which when <u>potassium</u> react with <u>oxygen</u>, as a product it formed <u>Potassium oxide</u> which means <u>adding of oxygen</u> (<u>oxidation</u>).

You might be interested in
How are speed and velocity different?
liubo4ka [24]

Velocity tells you how fast and in what direction. Speed only tells how fast.

4 0
3 years ago
Read 2 more answers
g (12 points) The time between incoming phone calls at a call center is a random variable with exponential density p(x) = 1 r e
rusak2 [61]

Answer:

(1)p(x)\geq 0\\(2)\int_{0}^{\infty} p(x) dx=0

Explanation:

A function f(x) is a Probability Density Function if it satisfies the following conditions:

(1)f(x)\geq 0\\(2)\int_{0}^{\infty} f(x) dx=0

Given the function:

p(x)=\dfrac{1}{r}e^{-x/r} \: on\: [0,\infty), where\:r=\dfrac{20}{ln(2)}

(1)p(x) is greater than zero since the range of exponents of the Euler's number will lie in [0,\infty).

(2)

\int_{0}^{\infty} p(x)=\int_{0}^{\infty} \dfrac{1}{r}e^{-x/r}\\=\dfrac{1}{r} \int_{0}^{\infty} e^{-x/r}\\=-\dfrac{r}{r}\left[e^{-x/r}\right]_{0}^{\infty}\\=-\left[e^{-\infty/r}-e^{-0/r}\right]\\=-e^{-\infty}+e^{-0}\\SInce \: e^{-\infty} \rightarrow 0\\e^{-0}=1\\\int_{0}^{\infty} p(x)=1

The function p(x) satisfies the conditions for a probability density function.

6 0
3 years ago
If the temperature is held constant during this process and the final pressure is 683 torrtorr , what is the volume of the bulb
Anna [14]

Answer:

Explanation:

Let the volume of the unknown bulb = X L

The volume of the system , after opening valve = (X + 0.72 L )

Use Boyles law gas equation,

P1V1 = P2V2 ( at temperature is constant )

Given:

P1 = 1.2 atm

P2 = 683 torr

Converting mmHg to atm,

1 atm = 760 mmHg(torr)

683 mmHg = 683/760

= 0.8987 atm

1.2X = 0.8987*(X + 0.720)

1.2X = 0.8987X + 0.6471

0.3013X = 0.6471

X = 2.15 L

5 0
3 years ago
What is the difference between a neap and a spring tide in terms of size?
Mamont248 [21]
Spring tides occur when the moon is either new or full, and the sun, the moon, and the Earth are aligned. ... neap tide- A tide in which the difference between high and low tide is the least. Neap tides occur twice a month when the sun and moon are at right angles to the Earth.
7 0
3 years ago
A ground-fault circuit interrupter shuts down a circuit if it?
alukav5142 [94]
C: if it senses unequal currents
6 0
2 years ago
Other questions:
  • Which value is equivalent to 178 centimeters?
    15·1 answer
  • Which of the following best describes a plane?
    9·1 answer
  • An error in witch macromolecule is the cause of hemophilia
    14·2 answers
  • Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center?
    13·2 answers
  • Describe the acceleration of the cart shown. Assume there is no friction.
    7·2 answers
  • A group of animals have short, narrow legs that are partly webbed. In which environment do these animals MOST LIKELY live? A) de
    15·2 answers
  • Heated lithium atoms emit photons of light with an energy of 2.961 × 10−19 J. Calculate the frequency and wavelength of one of t
    11·1 answer
  • Write a hypothesis about the effect of the red light on the population. Use the "if . . . then . . . because . . ." format, and
    7·2 answers
  • Terangkan lokasi zaman prasejarah di Malaysia
    9·1 answer
  • A man walks 6 km north, then turns and walks 6 km east what is the resultant and angle
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!