Answer:
ZnO + H2SO4 = ZnSO4 + H2O | Chemical reaction and equation
Explanation:
gloogle
Democritius thought that
are the smallest particles of matter.
Please give 1 answer.
A.
Electrons
B.
Protons
C.
Neutrons
D.
Atoms
An object has a density of 40 g/cm3 and a mass of 240 g what is it’s volume
Answer:
6cm^3
Explanation:
240/40=6
6 cm^3
Which of the following best describe the charge of an electron?
a. electrons have a negative charge
b. lectrons have a positive charge
c. electrons have no charge
Answer:
C
Explanation:
Because together all of the electrons create a negative charge.That balances the positive charge of the protons in the atomic nucleus.
When using the process of evaporation to separate a mixture, what is left behind
in the evaporating dish?
Answer:
When a solution is heated, the solvent evaporates, leaving behind the dissolved solids as residue. When a solution containing dissolved solutes is heated, the solvent will evaporate. Only the solute will remain in the evaporating dish.
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When using the process of evaporation to separate a mixture, solute is left behind in the evaporating dish
What is evaporation?
Evaporation is a sort of vaporization that occurs on a liquid's surface when it transitions from a liquid to a gas.
Evaporation is a separation technique that can be used to separate components of a combination including a decomposed solid in a liquid. The liquid gets evaporated, which means it is converted from a liquid to a gas. This frequently necessitates the use of heat. The solid will be all that remains after the liquid has entirely evaporated.
To more about evaporation.
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What is the ability for a substance to flow
The ability for a substance to flow is fluidity.
Which substances show flowing?Only liquid and gaseous substances have the ability to flow from one point to other as they have weak intermolecular force in it.
Fluidity is the quantity which gives idea about the ability of that substance to flow. At normal conditions at room temperature, any substance has the tendency to distort its shape in order to flow or take the shape of the container it is enclosed in.
Hence the ability for a substance to flow is fluidity.
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In which type of reaction is ATP the driving force?
O
A. anabolism only
o
B. catabolism only
O
C. both anabolism and catabolism
D. neither anabolism nor catabolism
HELP PLEASE!!
2. The atomic number of an atom comes from *
The number of electrons.
The number of neutrons.
The number of protons.
Its atomic mass.
3. How many moles of H20 are in 15.2 grams of pure ice?
Answer:
18.01528 grams.
Explanation:
Ther are 0.84 moles of [tex]H_{2}O[/tex] in 15.2 g of pure ice.
The molar mass of [tex]H_{2}O[/tex] is 18g.
To calculate the number of moles of a substance in a given mass of the sample, we divide the given mass by the molar mass of the sample,
Number of moles = given mass / molar mass
It is given that we have 15.2g of pure ice. Then the number of moles of [tex]H_{2}O[/tex] will be:
n = 15.2/18
n = 0.84 moles.
Learn more about molar mass:
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s. What happens
the heat
from
the heat source?
What is the difference between condensation and evaporation?
Condensation is the phase change from gas to a liquid, whereas evaporation is the phase change from liquid to gas.
To Identify a mineral, there are tests that are used including:
Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction.
HELP!!! DUE TONIGHT!!
10 PTS!!
the answers are given already but my teacher wants me to show work...pls help!!!
Answer:
K I will attempt
Explanation:
a)
[tex]O_2_{(g)}+ 2H_2_{(g)} => 2H_2O_{(l)}\\[/tex]
b)
1 : 2 : 2 (I don't know if this is what the question wants but it is what I would answer)
c)
Hydrogen because it requires 2 moles of H2 to react with 1 mole of O2
d)
24 moles of water. Look at stoichiometric coefficient. 2:2 means 24 moles you get 24 moles
e)
Oxygen. 2 < 5/2. Remember, 1 mole of O2 requires 2 moles of H2. But 5/2 is still greater than 2
f)
First, let's find out how many moles of water we can get. Since O2 is the limiting reactant, and O2:H2O ratio is 1:2, we will get 4 moles of H2O. Then, we can multiply 4 by Avogadro's number which is [tex]6.022*10^{23}[/tex] to get the number of molecules. We get: 2.41 * 10^24 molecules of water.
Answer:
I'ma just take the point thank you very much
HURRY ANSWER NOW AND I GIVE BRAINLY!!! HURYYY
1. A student left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she put it outside, the water was a solid. Twelve hours later, the water had changed phase and was a liquid. What happened to the water molecules?
Answer:
A. "before the student left, the molecules we're moving in place. After, the molecules we're moving around each other.
Explanation:
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If 2.5 grams of calcium bromide reacted with excess lithium oxide, how many grams of bromide product would be formed?
Photosynthesis requires light, water, and CO2 to work. When one of these factors is in short supply, it is called a limiting factor. Temperature can also be a limiting factor when it is too hot or too cold for photosynthesis to work well. If you are trying to grow plants in a greenhouse, why is it important to know the limiting factor?
A farmer can be more successful in understanding which plant produces and how to grow plants with a higher degree of photosynthesis with less material and time exhaustion, by recognizing what the limiting factor is.
Hope this helps! Please correct me if I'm wrong :)
Moles /Number of Particles Con
A) Convert the following to Moles
(1) 2.03X1022 atoms of lithium, Li
(2.03x10^22)/(6.02x10^23) = .033721 mol Li
I hope this helps, if not, i am sorry
What is the mass of 3.01 x 1023 atoms of FeO?
Which best explains why the atomic theory is a scientific one?
A. The theory was written by a famous scientist and has been around
for a very long time.
B. The theory describes what atoms are and has not changed over
time.
C. The theory explains many observations and is supported by a
large amount of evidence.
D. The theory represents a guess by many different scientists about
how atoms work.
Answer:
C
Explanation:
Answer:
it will option c it is perfect
Which of the 3 sub particles of an atom, weighs the LEAST?
Answer:
Electron, as it carries a negative charge
Explanation:
how many feet is 1000 km?
Answer: 0.3 feet
Explanation:
0.0003048km=1ft
1,000*0.0003048= 0.3048
rounded would be 0.3
ehat is the name of the hydrate Ba(OH)2 8 H2O
Answer: Barium hydroxide octahydrate
Explanation:
What is the conversion for 2.0 m + 3.33 m + 4 m =
Answer:
933/100
9.33m
....... . . . . .. .. .
Based on the image below, what is the displacement of the sound wave for Sound A + B at 0.1025 seconds?
A. -0.3316
B.0.3316
C.0.6255
D.1.6162
Answer:
The displacement of the sound wave for Sound A + B at 0.1025 is;
D. 1.6162
Explanation:
The sum of the displacement of two sound waves is given by the principle of superposition as follows;
y(x, t) = [tex]y_m[/tex]·sin(k·x - ω·t) + [tex]y_m[/tex]·sin(k·x - ω·t + ∅)
Therefore, by the property of the superposition of waves, the amplitudes of linear waves are added linearly when they meet at the same point at a the same time
The given parameters for the wave are;
The time at which the value of the wave amplitude are given, t = 0.1025 seconds
The displacement of the sound wave A at the given time, "t" is A = 0.9739
The displacement of the sound wave B at the given time "t" is B = 0.6423
Therefore, the displacement of the sound A + B = 0.9739 + 0.6423 = 1.6162
USE LETTERS FOR ANSWERS, NO NEED TO EXPLAIN
a) Substitute symbols and formulas for words.
b) Predict the products. If no reaction occurs, write “NR” after the --> sign. c) Include abbreviations for the physical state.
d) Write out and balance the equation.
6. Mercury is poured into an aqueous solution of zinc nitrate.
7. Solutions of potassium iodide and lead (II) nitrate are mixed. The resulting lead compound is a precipitate.
thank you! :)
Answer:
Ok:
Explanation:
6a) [tex]Hg + Zn(NO_3)_2\\[/tex]
b) NR
c) [tex]Hg_{(l)} + Zn(NO_3)_2 {(aq)}=> NR[/tex]
d) Welp, no reaction so i don't know.
7a) [tex]KI + Pb(NO_3)_2[/tex]
b) [tex]PbI_2 + KNO_3[/tex]
c) All are aqeuous except for PbI2 which is solid
d) [tex]2KI _{(aq)}+ Pb(NO_3)_2_{(aq)} => PbI_2_{(s)} + 2KNO_3_{(aq)}[/tex]
Check if that is ok or if my work has any issues :).
HELP PLZZZZZZZZZZZZZ I WILL GIVE BRAINLIST!!!!!!!!!!!
If you place Alka -Seltzer tablets in a closed container of water, the tablets effervescence then produce a gas. What will eventually happen inside this closed container?
A. Not enough information to determine.
B. The pressure decreases.
C. The pressure increases.
D. The pressure remains the same.
Answer:
c the pressure increases
Physical is to chemical as size is to ???
Answer:
Physical is to chemical as size is to length
Explanation:
That's for if your looking for the synonym of size. (i dont really know what your asking, but if your looking for the opposite of size than its length.)
List the 3 particles of an atom (w/their symbol & charge)
Proton p +1
Neutron n 0
Electron e- -1
Please help!!! I'll give brainliest to the most helpful answer
please this is due today and I have no idea :// 3
Emilio wants to tell a friend where an element's name is located within it's box in the periodic table. Which of the following is an accurate explanation to find an element's name?
the name is at the top of the box
the name is the large letter or letter combination in the box
the name is the word below the large letter combination in the box
the name is the last piece of information in the box
Answer:
A
Explanation:
hope this helps!
The name is the word below the large letter combination in the box
mention the three colours of Zanzibar .
Answer:
horizontal tricolor with three equal-sized stripes of blue, black and green.
Explanation:
hope this is what u want
Answer: ↓
Black and Vivid Cerulean,
About The Photos: This second Photo is the flag from the 2000's I believe, and the first Photo shows the 1964 flag.