Answer:
You need to add more points people will not answer if its this low
Explanation:
A chemical reaction occurs. The equation is: MgO ---> Mg + 0 This is a
combination reaction
decomposition reaction
double replacement reaction
single replacement reaction
Answer:
decomposition reaction
Explanation:
oxygen is broken down from magnesium oxide (mgo)
What percentage of Canada's 2005 population was between the ages of 30 and 44?
How much heat is required to boil 78.5 gg of water at its boiling point?
Answer:
206 kj of heat is required to boil 78.5 kg of water at its boiling point
Calcium hydroxide and hydrogen gas are produced by the reaction of calcium hydride and water
Explanation:
The reaction forms calcium hydroxide, Ca(OH)2 and hydrogen gas (H2). The calcium metal sinks in water and after an hour or so bubbles of hydrogen are evident, stuck to the surface of the metal.
Answer: B) calcium hydride + water -> calcium hydroxide + hydrogen
Explanation: B) on EDG
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
its b
i did the quiz and got it right it is b
Answer:
b
Explanation:
took test on edge
A 20.0L container holds 0.650 mol of He gas at 37.0C at a pressure of 628.3torr. The new pressure inside the container will be _______ torr if the volume is reduced to 12.0L, the temperature increased to 177C, and 1.25 mol of additional He gas was added.
Answer:
2918.4 torr
Explanation:
From;
PV=nRT
We have that the new conditions of the gas are;
V = 12.0 L
T1 = 177 + 273 = 450 K
n = 1.25 mol
R= 0.082 atm LK-1mol-1
P= ?
P = nRT/V
P = 1.25 * 0.082 * 450/12.0
P = 3.84 atm
Since
1 atm = 760 torr
3.84 atm = 3.84 * 760 = 2918.4 torr
Match the part of the wave to its description.
Crest
Wavelength
Trough
Amplitude
These are the correct answer your welcome ;)
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
Please help. Im not a very smart person
Car battery energy that makes device work
Answer:
No it's not make device work
Explanation:
I think soo
Two ways water and ice are the same
Answer:
1- water is ice
2- ice is water
Explanation:
1- the water is just froze
2- the ice is just solid water
How many moles of nitrogen gas would be produced if 3.27 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction? 2 NH3(g) + 3 CuO (s) – 3 Cu(s) + N2(g) + 3 H2O(g)
Moles of Nitrogen(N₂) gas would be produced : 1.09
Further explanationThe reaction coefficient in a chemical equation shows the mole ratio of the components of the reactants and products
If one mole of the reactant or product is known, then we can determine the moles of the other compounds involved in the reaction
Reaction
2NH₃(g) + 3CuO (s) ⇒ 3Cu(s) + N₂(g) + 3 H₂O(g)
Copper(II) oxide was reacted with excess Ammonia, so CuO as a limiting reactant and moles of the product is based on moles of CuO
moles of CuO = 3.27
From the equation, the mol ratio of CuO : mol N₂ = 3 : 1, so mol N₂ :
[tex]\tt \dfrac{1}{3}\times 3.27=1.09[/tex]
The_______ and _____ are the main systems that move fluid throughout the body.
Answer:
circulatory system, lymphatic system
Explanation:
I just did the assigment and got it right.
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?
The sample of Carbon-14 after 28,575 years=0.001875 mg
Further explanationGeneral 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]
What is the element Ar classified as in the periodic table?
a noble gas
a halogen
a metalloid
a metal
The element Ar classified as noble gas in the periodic table. Therefore, the correct option is option A.
What is noble gas?The noble gases are a group of chemical elements that share several characteristics. They are all monatomic, odourless, and colourless gases with relatively little chemical reactivity under normal conditions. Oganesson (Og) is a highly radioactive element created synthetically.
Although the IUPAC has included oganesson since "group 18" and "noble gas" have been used interchangeably, oganesson may not be appreciably chemically noble and therefore is projected to deviate from the norm and just be reactive owing to relativistic effects. Its chemistry is still being studied due to the exceptionally short 0.7 ms ½ of its sole known isotope. The element Ar classified as noble gas in the periodic table.
Therefore, the correct option is option A.
To know more about noble gas, here:
https://brainly.com/question/7036466
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How many atoms are in 39.2 g of calcium?
a) 6.022 x 10^23 aoms
b) 235.2 x 10^23 atoms
c) 5.89 x 10^23 atoms
d) 40.08 x 10^23 atoms
Answer:
5.89× 10²³ atoms of Ca
Explanation:
Given data:
Mass of Ca = 39.2 g
Number of atoms = ?
Solution:
Number of moles of Ca:
Number of moles = mass/molar mass
Number of moles = 39.2 g/40.078 g/mol
Number of moles = 0.978 mol
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
0.978 mol × 6.022 × 10²³ atoms / 1 mol
5.89× 10²³ atoms of Ca
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
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)
what are the 4 quantum numbers of Kr?
Answer:
2 8 18 8 those are the ones I believe.
Why does the Sun gravitationally dominate all other objects in the Solar System?
Which of these compounds has the highest boiling point?
Pentene
Chloropentane
2 Pentanone
Pentane
Answer:
2-Pentanone is the answer.
Explanation:
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)?
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
A balloon originally had a volume of 4.39 L at 44C and a pressure of 729 torr  to what temperature must the balloon be cooled to reduce its volume to 3.78 L of the new pressure is at 1.0 atm
The new temperature : 11.56 °C
Further explanationBoyle's law and Gay Lussac's law
[tex]\tt \dfrac{P_1.V_1}{T_1}=\dfrac{P_2.V_2}{T_2}[/tex]
P1 = initial gas pressure (N/m² or Pa)
V1 = initial gas volume (m³)
P2 = final gas pressure
V2 = final gas volume
T1 = initial gas temperature (K)
T2 = final gas temperature
V₁=4.39 L
T₁=44+273=317 K
P₁ = 729 torr = 0,959211 atm
V₂=3.78 L
P₂= 1 atm
[tex]\tt \dfrac{0.959211\times 4.39}{317}=\dfrac{1\times 3.78}{T_2}\\\\T_2=\dfrac{1\times 3.78\times 317}{0.959211\times 4.39}\\\\T_2=284.559~K=11.56~C[/tex]
The common name for butanone, a readily available solvent, is
Answer:
methyl ethyl ketone
Explanation:
(MEK)
A mixture of hydrocarbons contains 34.8% heptane, C7H16, 10.1% nonane, C9H20, and 55.1% octane, C8H18. The mixture is combusted in an excess of oxygen. What mass of CO2 is generated from the combustion of 17.0 kg
of the mixture?
:
Mass Heptane : 0.348 x 17 = 5.916 kg
mass C in Heptane (MW=100.21 g/mol) :
[tex]\tt \dfrac{7.12}{100.21}\times 5.916=4.959~kg[/tex]
Mass Nonane : 0.101 x 17 = 1.717 kg
mass C in Nonane (MW=128.2 g/mol) :
[tex]\tt \dfrac{9.12}{128.2}\times 1.717=1.446~kg[/tex]
Mass Octane : 0.551 x 17 = 9.367 kg
mass C in Otane (MW=114.23 g/mol) :
[tex]\tt \dfrac{8.12}{114.23}\times 9.367=7.872~kg[/tex]
Total mass produced :
4.959+1.446+7.872=14.277 kg
The branch of science which deals with chemicals is called chemistry.
The correct answer is 14.277 kg
The calculation part is as follows:-
Mass Heptane : [tex]0.348 * 17 = 5.916 kg[/tex] Mass C in Heptane (MW=100.21 g/mol) :[tex]\frac{7.12}{100.21} *5.916 = 4.959kg[/tex]
Mass Nonane : [tex]0.101 * 17 = 1.717 kg[/tex] Mass C in Nonane (MW=128.2 g/mol) :
[tex]\frac{9.12}{128.2} *1.717 =1.446kg[/tex]
Mass Octane : [tex]0.551 * 17 = 9.367 kg[/tex] Mass C in Otane (MW=114.23 g/mol) :
[tex]\frac{8.12}{114.23}*7.872 kg[/tex]
Total mass-produced is
[tex]4.959+1.446+7.872=14.277 kg[/tex]
Hence, the correct answer is - 14.277kg.
For more information, refer to the link:-
https://brainly.com/question/25026730
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!
Answer:
gravwfewtu
Explanation:
ushifelllf
I was born in ……… west.
complete this sentense with article
Answer:
Article is
I was born in the west .
The nucleus is the cell as
A nucleus is an organelle found in the eukaryotic cells. Inside it's fully enclosed nuclear membrane, it contains the minority of the cell's genetic material. This material would be called DNA molecules.
Hope this helps! If not I'm so sorry. Have a lovely day
4 Some elements have symbols that do not appear to match their names. For
example, the symbol for sodium is Na. Why is this?
Answer:
It is because some elements have the symbol of their Latin names for example - Latin name of sodium is Natrium and potassium is Kalium .Thatswhy their symbol differs from their modern name .
1.Outline the results of the Cathode ray tube?
Answer:
this showed that the cathode rays traveled in straight line
Phosphorus-32 has a half life of 14.3 days. How many days will it take for a
radioactive sample to decay to one-eighth its original size?
It will take 42.9 days
Further explanationGeneral 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
t1/2=14.3 days
Nt/No=1/8
[tex]\tt Nt=No(\dfrac{1}{2})^{T/t1/2}\\\\\dfrac{Nt}{No}=\dfrac{1}{2}^{T/t1/2}\\\\\dfrac{1}{8}=\dfrac{1}{2}^{T/t1/2}\\\\(\dfrac{1}{2})^3=\dfrac{1}{2}^{T/t1/2}\\\\3=T/14.3\rightarrow T=42.9~days[/tex]