Chemistry College

A chemical reaction occurs. The equation is: MgO ---> Mg + 0 This is a

combination reaction
decomposition reaction
double replacement reaction
single replacement reaction

Answers

Answer 1

Answer:

decomposition reaction

Explanation:

oxygen is broken down from magnesium oxide (mgo)

Related Questions

Silver nitrate and magnesium chloride react according to the following equation:
2AgNO3(aq) + MgCl2(aq) — 2AgCl(s) + Mg(NO3)2(aq)
What volume (in ml) of 0.247M MgCl2(aq) is required to react with 63.2 mL of 0.192M AgNO3(aq)?

Answers

Answer:

V=24,3mL

Explanation:

1)n(AgNO3)=Cm*V=0.063l*0.192M=0.012

2)n(AgNO3)/2=n(MgCl2) => MgCl2=0.012/2=0.006

3)V(MgCl2)=n/Cm=0.006/0.247=0.0243L=24,3ml

Carbon-14 has a half-life of 5715 years. It is used to determine the age of
ancient objects. If a sample today contains 0.060 mg of carbon-14, how much
carbon-14 will be present after 28,575?

Answers

The sample of Carbon-14 after 28,575 years=0.001875 mg

Further explanation

General formulas used in decay:  

[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{T/t\frac{1}{2} }}}[/tex]

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

Carbon-14 has a half-life of 5715 years, so t1/2=5715 years

A sample today contains 0.060 mg of carbon-14, so No=0.06 mg, then :

[tex]\tt Nt=0.06(\dfrac{1}{2})^{28575/5715}\\\\Nt=0.06(\dfrac{1}{2})^5\\\\Nt=0.001875~mg[/tex]

If 4.25 grams of copper were plated out in the reaction:
3Cu2+ + 2Al ---> 3Cu + 2Al3+
What mass of aluminum would have dissolved?

Please show all work!

Answers

Answer:

gravwfewtu

Explanation:

ushifelllf

pls help 40 points!! Augie created this chart about the two kinds of waves.

A 2-column table with 3 rows titled 2 Kinds of Waves. The first column labeled Title 1 has entries the transfer energy is perpendicular to the direction of the wave motion, particles move up and down, particles move only slightly. The second column labeled Title 2 has entries the transfer direction is parallel to the direction of wave motion, particles move side to side, particles move only slightly.

Which best labels the chart?

Title 1 is “Longitudinal Waves,” and Title 2 is “Transverse Waves.”
Title 1 is “Transverse Waves,” and T

Answers

its b

i did the quiz and got it right it is b

Answer:

b

Explanation:

took test on edge

Match the part of the wave to its description.
Crest
Wavelength
Trough
Amplitude
These are the correct answer your welcome ;)

Answers

Answer:

sgsgueiehéyegeysuegeteue2

Answer:

Explanation:

The answers you put are correct...

crest- A crest point on a wave is the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum.

wavelength- In physics, the wavelength is the spatial period of a periodic wave the distance over which the wave's shape repeats. (how long the wave is)

trough- A trough is the opposite of a crest, so the minimum or lowest point in a cycle.

amplitude-  Amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path. ... Waves are generated by vibrating sources, their amplitude being proportional to the amplitude of the source.

Hope this helps! Have a great day!!  :D

Which of the following is a simple definition of reduction?

A. the loss of electrons

B. the gain of electrons

C. an agent that oxidizes something

D. an agent that reduces something

The answer is B on Edg 2020

Answers

Answer:

B. the gain of electrons

Explanation:

An easy way to remember this concept is the pneumonic OIL RIG:

Oxidation is Loss (of electrons)

Reduction is Gain (of electrons)

B. The gain of electrons
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