Answer:
Zn(s) + 2H₂O (l) → Zn(OH)2(aq) + H2(g)
Sn(s) + O2(g) →SnO2(s)
Cd(s) + Pb(NO3)2 (aq) →Cd(NO3)2 (aq) + Pb(s)
Cu (s) + HCl(aq) → can not occur
Explanation:
Metals reacts with liquid water to yield the corresponding metallic hydroxide and hydrogen gas as shown above; Zn(s) + 2H₂O (l) → Zn(OH)2(aq) + H2(g)
Tin reacts with oxygen to yield tin (IV) oxide. This is an oxidation reaction as shown; Sn(s) + O2(g) →SnO2(s)
The reaction between Cd and Pb(NO3)2 is a single replacement reaction. It is possible because Cd is above Pb in the electrochemical series. Hence the reaction occurs thus; Cd(s) + Pb(NO3)2 (aq) →Cd(NO3)2 (aq) + Pb(s)
Copper does not displace hydrogen from dilute acids (such as HCl) since copper is lower than hydrogen in the electrochemical series hence the reaction does not occur.
A certain element has only two naturally occurring isotopes: one with 18 neutrons and the other with 20 neutrons. The element forms I- charged ions when in ionic compounds. Predict the identity of the element. What number of electrons does the charged ion have?
Answer:
[Cl-18]⁻ & [Cl-20]⁻
Explanation:
By definition isotopes are elements with the same number of protons by different number of neutrons. Elements X-18 & X-20 have 17 protons and represent Chlorine isotopes Cl-18 & Cl-20 each with 17 protons and 18 electrons to give the isotopes a -1 oxidation state. Both isotope of chlorine have 7 electron in its valence shell and 10 electrons in its core structure. Gaining 1 electron fills the valence octet and establishes a -1 oxidation state.
please begging you guys someone help me
Answer:
See Explanation
Explanation:
10) From the options provided for this question, gamma particle is the most energetic. Recall that gamma rays are high energy electromagnetic radiation which are capable of causing a high degree of ionization in matter.
11) The bombardment of U-235 with neutrons leads to the reaction;
[tex]U\frac{235}{92} + n\frac{1}{0}---> I\frac{138}{53} + Y\frac{95}{39} +3n \frac{1}{0}[/tex]
Hence
a = 92, b= 95, c= 53
12) In positron emission, a proton is transformed into a neutron. The mass number of the daughter nucleus is the same as its parent but the atomic number decreases by 1.
Hence;
[tex]Th\frac{231}{90} -----> e\frac{1}{0} +Ac \frac{231}{89}[/tex]
2. An atom of Be has four protons, five neutrons and four electrons. What 10 poin
is the mas of Be? *
O a.4
b. 5
c. 1
09
Answer:
Five ( 5 ) is the correct answer
is the process of sediment being placed in a new location.
When sediment is carried away, this process is called
Answer:
Deposition
Explanation:
Deposition is the process of sediment being placed in a new location.
Answer: Deposition is the process of sediment being placed in a new location.
When sediment is carried away, this process is called erosion
Explanation:
Where did water become gas?
F
E
Temperature (°C)
В
Time (minutes)
O A-B
OB-C
OE-F
OD-E
How many mL of 3.0 M HCl are needed to make 300.0 mL of 0.10 M HCl?
Answer:
V₁ = 10 mL
Explanation:
M₁V₁ = M₂V₂
M₁ = Initial molarity
V₁ = Initial volume of HCl
M₂ =Final molarity
V₂ = Final volume
Now we will put the values.
3.0 M ×V₁ = 0.10 M×300.0 mL
3.0 M ×V₁ = 30 M.mL
V₁ = 30 M.mL /3.0 M
V₁ = 10 mL
hope its helpp
2. What coefficients would balance the following equation?
_C2H6 +_027_C02 +_H20
A. 1C2H6 + 502 – 2002 + 3H20
B. 2C2H6 + 502 + 4002 + 6H20
O C. 2C2H6 + 702 4CO2 + 6H20
O D. 2C2H6 + 1002 > 4CO2 + 6H20
Answer:
C
Explanation:
Assuming you had a few typos in the equations, I would say C
I am going to assume the reaction
_C2H6 + _O2 → _CO2 + _H2O
Right now, there is enough hydrogen to make 3 water molecules, but since oxygen comes in groups of 2, it wouldn't work.
Therefore, we need 2 ethane molecules.
2C2H6 + _O2 → _CO2 + _H2O
Then balance the right side with the carbons and hydrogens
2C2H6 + _O2 → 4CO2 + 6H2O
So we need 4 O2's in carbon dioxide and 3 O2's in water (Since water uses 1 oxygen molecule per 2 hydrogens). Hence we will need 7 oxygens
2C2H6 + 7O2 → 4CO2 + 6H2O
And assuming errors in the typing, C should be the answer (if this matches)
What are the main components in dna
Determine the oxidation number of the element "X" in H2XO4.
A researcher is trying to identify whether household
substances are basic. Which approach would BEST help
the researcher investigate whether substances are
basic?
O A. Test each substance with blue litmus paper.
a
B. Test each substance with red litmus paper.
O
C. Mix each substance with a weak base and record the
results.
o
D.. Observe each substance and record its color.
Some students were investigating the speed of a toy car they built. They performed two trials and recorded the data in the table below. What was the average speed of the toy car during the two trials to the nearest tenth of m/s
Answer:
It's 3.0
Hope this helps
how could you use a thin glass tube to place the crystal at the bottom of the beaker of water
Answer:
explation
Explanation:
you put ice cold water in a glass, and in another glass put boiling water, how long would it take for the two cups of water to be roughly the
Due to the surface tension of water and the crystals ability of diffusion the crystals are placed at the bottom of the beaker of water.
What is diffusion?Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.
There are 2 main types of diffusion:
1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.
2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.
There are 2 types of facilitated diffusion one is osmosis and dialysis.
Learn more about diffusion,here:
https://brainly.com/question/14852229
#SPJ2
What are the different variables of greenhouse gases and how do they affect one another?
On an as yet undiscovered planet, the atmo-
sphere is composed of a mixture of 79% argon
and 20% oxygen (volume percentage) along
with trace amounts of other gases, including
CO2, Kr, and Ne. An enterprising student on
that planet wishes to sell the equivalent of he-
lium balloons to small children. Heliun is not
available.
Which of the gases
1) krypton
II) carbon dioxide
III) methane
IV) propane
V) nitrogen
VI) carbon monoxide
would be an acceptable replacement so that
the balloons will float in that atmosphere?
Answer:
7 and carbon dioxide good luck with the answer
Balance the following chemical equation by providing the correct coefficients:
[ ]HBr + [ ]Ba(OH)2 -> [ ]BaBr2 + [ ]H20
Answer:
2HBr + Ba(OH)2 → BaBr2 + 2H2O
Explanation:
Hydrogen Bromide + Barium Hydroxide = Barium Bromide + Water
The balanced chemical equation with the correct coefficients is 2HBr + Ba(OH)₂ → BaBr₂ + 2H₂O.
First balancing the barium (Ba) atoms first. There is one barium atom on the left side and one on the right side, so no coefficients are needed for barium.
HBr + Ba(OH)₂ → BaBr₂ + H₂O
There is one hydrogen atom on the left side and two hydrogen atoms on the right side. To balance the hydrogen, place a coefficient of 2 in front of HBr:
2HBr + Ba(OH)₂ → BaBr₂ + H₂O
There are two bromine atoms on the left side and two bromine atoms on the right side, so they are already balanced.
2HBr + Ba(OH)₂ → BaBr₂ + H₂O
There is one barium atom on the left side and one barium atom on the right side, so they are already balanced.
Balance the oxygen (O) atoms. There are two oxygen atoms on the left side and only one on the right side. To balance the oxygen, place a coefficient of 2 in front of H₂O.
2HBr + Ba(OH)₂ → BaBr₂ + 2H₂O
To learn more about the coefficients, follow the link:
https://brainly.com/question/23702958
#SPJ6
put some ice in a clean glass. examine it every 3 minutes for half oan hour . DIscribe what happens to the ice
Answer:
the ice starts melting and turns into water
Why are some waves small and some large?
(◕‿◕✿) Hey There!
Answer → The Waves Size depends on ★ wind speed ★ , ★ wind duration★ , and the ★ area over which the wind is blowing ★
✨Hope This Helps!✨
3) Pick the correct definition for : A signal represented by a continuous wave *-1 analog signal-2 digitized siganal-3-encode-4-transmit-5-wave pulse.
plzzzz help brainliest and 50 points
Answer:
it is analog signal, your welcome
Analog Signal is the correct answer
Hope it helps you
Will mark brainly
ASAP thank you if you solve this
In a chemical reaction, the mass of the reactants is 13.3 grams. Which of the
following could represent the mass of the products?
Answer:
26.6
Explanation:
what gives bases their properties?
What does q = 0.75 g x 0.897 J/g•°C x 22°C equal?
Answer:
14.8005 Joules
Explanation:
This question is describing the calculation for the amount of heat (Q) a substance absorbs or releases. The amount of heat, Q, is calculated using the formula:
Q = m × c × ∆T
Where;
Q = amount of heat (Joules)
m = mass of substance (g)
c = specific heat of substance (J/g°C)
∆T = change in temperature of substance i.e. final temperature - initial temperature (°C).
According to this question, the following expression is given:
q = 0.75 g x 0.897 J/g•°C x 22°C
To calculate this further, this will equal to: 14.8005
This means that the amount of heat, q, absorbed or released by that substance is equal to 14.8005 Joules.
A graph titled Average Amplitude of Waves from 2009 to 2011 with vertical axis Average Amplitude (meters) and horizontal axis Year. A line goes in straight segments from 2009 50 to 2010 175 to 2012 125.
A structural engineer is using this table to design a wall to protect a city near the ocean.
How high should the engineer build the wall?
50 meters
100 meters
150 meters
200 meters
Answer:
200
Explanation:
got it right on the test
Answer:
200
Explanation:
What is the best option?
Oxidation state of Ruthenium?
Answer:
0 to +8, and −2
Explanation:
Answer:
In addition to carbonyl and organometallic compounds in the low oxidation states −2, 0, and +1, ruthenium forms compounds in every oxidation state from +2 to +8. Very volatile ruthenium tetroxide, RuO4, used in separating ruthenium from other heavy metals, contains the element in the +8 oxidation state.
Valence: 1, 2, 3, 4, 5, 6, 7, 8
Melting point: 2,250° C (4,082° F)
and the most stable oxidation state of ruthenium is +8
Which reaction type is really part of another type of reaction but treated separately? Explain
Answer:
Oxidation - reduction reaction which is called redox reaction.
Explanation:
The type of reaction that is a part of another type but treated separately is called Oxidation - reduction reaction.
Thus is because they usually involve 2 separate half reactions which are oxidation reactions that involve loss of electrons and then reduction equations which involve gain of electrons.
They are treated separately for example when sodium reacts with chlorine to form sodium chloride.
2Na + Cl2 = 2NaCl
Now, sodium undergoes oxidation by loosing elctrons and it's half reaction is;
2Na → 2Na^(+) + 2e^(-)
Meanwhile chlorine undergoes reduction by gaining electrons and its half reaction is;
Cl2 + 2e^(-) → 2Cl^(-)
PLEASE HELP ASAP! AND PLEASE DO NOT GIVE ME ANY VIRUSES!
Carbon dioxide and oxygen are linked together in the carbon and oxygen cycle. There are two cellular processes involved in this cycle. What are they called, and what does each process make?
Mark two answers below.
Carbon dioxide is generated by cellular respiration and released into the atmosphere.
Cellular respiration makes oxygen that plants and animals can release into the atmosphere.
Carbon dioxide is a product of photosynthesis that plants release into the atmosphere.
Photosynthesis makes oxygen that plants can release into the atmosphere.
Answer:
The first one and the last one.
Explanation:
Carbon dioxide is generated by cellular respiration and released into the atmosphere.
Photosynthesis makes oxygen that plants can release into the atmosphere.
PLS HELP!!!!!! JENSSN
Answer: I'm not sure but I thinks its C
Explanation:
The minimum stream velocity necessary to transport a sediment particle that is 0.1 centimeter in diameter is closest to
Answer:
5.0 cm/s
Explanation:
Q = V * A
given that the diameter of the particle = 0.1 cm
V = stream velocity , A = cross sectional area of stream , Q = stream flow
For a particle with a diameter of 0.1 cm,
To determine the stream velocity we will use a stadia rod to measure at least 5 meters down ( depth of stream ) three times and then take the average value which will be used to determine the cross sectional area of the stream but Given that the width of the stream is not given the closet value to the stream velocity will be = 5.0 cm/s
The isotopes K-37 and K-42 have the same...
1) number of neutrons
2) number of protons
3) mass number for their atoms
Answer:
WHEA O IN AN EREM STATO. PETUA TOT low 6 EN 6ACY STATE ... Determine both the total number of protons and the total number of neutrons in an atom of the naturally occurring carbon isotope with the largest mass number.
Explanation:
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