Answer:
A.) cell membrane
Explanation:
I hope I helped, have a good day
what gives bases their properties?
What makes an atom stable?
a. Having the nucleus in the center
b. Being very small
c. Being neutral
d. Having the right number of protons and neutrons
molecular formula of CH2O, 120 g/mol
Explain whether each of the possible reactions listed below will occur. For those that will, predict what the products will be.
Zn(s) + H₂O (l) →
Sn(s) + O2(g) →
Cd(s) + Pb(NO3)2 (aq) →
Cu (s) + HCl(aq) →
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.
1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.
2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.
3. Take out 10 mL of this solution and put it into another 90 mL of clear water.
4. Keep diluting the solution like this 5 to 8 times.
5. Is the water still coloured?
Answer:
2
Explanation:
1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.
2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.
3. Take out 10 mL of this solution and put it into another 90 mL of clear water.
4. Keep diluting the solution like this 5 to 8 times.
5. Is the water still coloured?
______________Helps the earth continue to go around the sun
Gravity
Entropy
Magnetism
Inertia
Friction
Explain why alkanes can be described as hydrocarbons.
Answer:
The International Union of Pure and Applied Chemistry (IUPAC) defines alkanes as "acyclic branched or unbranched hydrocarbons having the general formula CnH2n+2, and therefore consisting entirely of hydrogen atoms and saturated carbon atoms". ... The number of carbon atoms may be considered as the size of the alkane.Calculate the volume in mL of 53.2 g of .251M solution of HCl.
Show work please
Answer:
5.813 mL
Explanation:
You need to use the formula : vol = mass / molar mass x molarity
the molar mass of HCl is 36.46 and the problem gives you the rest of the equation
0.251M x 36.46 = 9.151
53.2g / 9.151 = 5.813 mL
*I don't know some of the units so that's why some of them are blank sorry
*I'm also sorry if this is wrong but it's what I did so..
4.1 moles of sodium carbonate to molecules of sodium carbonate.
Answer:
2.469×10²⁴ molecules
Explanation:
Multiply by Avogadro's Number (6.022×10²³
¿Las cargas eléctricas forman parte de los átomos?
Answer:
si. en los atomos los protones y los electrones llevan cargas electricas
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
What effect does the addition of a catalyst have on a chemical reaction at equilibrium?
A.
It increases the rate of the forward reaction, only.
B.
It increases the rate of the reverse reaction, only.
C.
It increases the rate of both the forward and reverse reactions.
D.
It decreases the rate of both the forward and reverse reactions.
Answer:
C
Explanation:
In the presence of a catalyst, both the forward and reverse reaction rates will speed up equally. :)
If 186.0 liters of gaseous O_{2} at 1.09 atm and 577.0 ºC are required for the model rocket to climb 1000 feet, how many grams of solid KClO_{3} must be in the rocket engine?
Answer:
The right answer is "236.53 g".
Explanation:
The given values are:
P = 1.09 atm
V = 186 liters
The reaction will be:
⇒ [tex]KClO_3 (s)\rightarrow 2Kcl(s)+3O_2(g)[/tex]
The moles of O₂ will be:
= [tex]\frac{PV}{RT}[/tex]
On substituting the values, we get
= [tex]\frac{1.09\times 186}{0.0821\times 850}[/tex]
= [tex]\frac{202.47}{69.785}[/tex]
= [tex]2.90 \ moles[/tex]
Now,
1 mole O₂ is produced from
= [tex]\frac{2}{3} \ mol \ KClO_3[/tex]
then,
2.90 mole O₂ is produced from 2 mol KClO₃
= [tex]\frac{2}{3}\times 2.90[/tex]
= [tex]1.93 \ mol \ KClO_3[/tex]
hence,
The number of grans of solid in the engine will be:
= [tex]1.93\times 122.55[/tex]
= [tex]236.53 \ g[/tex]
Jordan is making a model of a cell. Where should Jordan place all of the cell's organelles?
A. the nucleus
B. the cytoplasm
C. the cell membrane
Answer:
use b
f3rtynrteagnhgm,./"?;.,khmjgnhfbgv
1. Identify the reactants in this chemical equation:
2H2 + O2 + 2H2O
Can you identify what object is being represented by the model on the right? gear clock battery
Answer:gear
Explanation:just did it right now
Answer: Gear
Explanation: just did it on Edge 2021
What force pulls the water down hill in a watershed, preventing it from going
OVER the drainage divide? *
Answer:
gravity
Explanation:
force downward due to gravity
Answer:
Gravity is the answer.
What is the total number of grams of HI in 0.500 liter of
1.00 M HI?
64.0 g
128 g
1.00 g
0.500 g
Answer:
The amount of HI is "64 grams".
Explanation:
The given values are:
Volume,
= 0.500 L
Molarity,
= 1.00 H
Molar mass of HI,
= 128
Now,
The moles of HI will be:
= [tex]Molarity\times Volume[/tex]
On substituting the values, we get
= [tex]1.00\times 0.500[/tex]
= [tex]0.5 \ mol[/tex]
hence,
The amount of HI will be:
= [tex]Moles\times Molar \ mass[/tex]
= [tex]0.5\times 128[/tex]
= [tex]64 \ grams[/tex]
i need help in this can someone help
Answer:
the limiting reagent is butane
Explanation:
5C₄H₁₀ + 25O₂ → 20CO₂ + 5H₂0
If a 28.0 L balloon with a temperature of
25 °C is cooled in a refrigerator, what will
be the volume of the balloon be when it
reaches 5 °C?
Answer:
5.6 L
Explanation:
We can apply Charles' Law here since our pressure is constant (will not change inside the refrigerator) and we are relating change in volume with change in temperature:
V₁ / T₁ = V₂ / T₂ where V₁ and T₁ are initial volume and temperature, and V₂ and T₂ are final volume and temperature. Let's plug in what we know and solve for the unknown:
28.0 L / 25 °C = V₂ / 5 °C => V₂ = 5.6 L
5.6 L is our new volume (at 5 °C).
How many grams of H2O would be made from 7.9 moles of H2? (Round to one decimal place)
Answer:
2.01588 grams
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 system international (SI) unit for energy is:
Question
The system international (SI) unit for energy is:
Answer: joule
PLZ BRAINLIEST+THANKS :)
how conditions on Earth would be different if its axis of rotation were vertical instead of tilted.
Answer:
there would be different times because the sun and moon are in different places and one side would be sunny for a long time
Explanation:
Which elements have two electron shells?
Helium
Lithium
Done
B
Boron
Calcium
Oxygen
Lead
Nitrogen
Keep going
Answer:
Helium (He)
Lithium (Li)
Beryllium (Be)
Boron (B)
Explanation:
The chemical elements which have two (2) electron shells are: Lithium and Boron.
Valence electrons can be defined as the number of electrons present in the outermost electron shell of an atom. Thus, valence electrons is typically used to determine whether or not an atom or group of chemical elements found in a periodic table can form a chemical bond with others.
This ultimately implies that, valency is a property that is typically used in determining the chemical properties of chemical elements.
An electron shell can be defined as the outermost shell of an atom around the atomic nucleus. Thus, it is considered to be an orbit accompanied by electrons around the nucleus of an atom.
In Chemistry, the chemical elements which have two (2) electron shells are:
Lithium: it has two electrons in its first shell and one electron in its second shell. Boron: it has two electrons in its first shell and three electrons in its second shell.Read more: https://brainly.com/question/18214726
Approximately how many formula units of NaCl are in 116.88g of table salt (NaCl), knowing that the molar mass of NaCl is 58.44g/mol?
Answer:
116.88g of table salt (NaCl) contains two formula units
Explanation:
Now,
We know that 1 formula unit of sodium chloride has a molar mass of 58.44g/mol
Hence;
Mass of 1 formula unit = 58.44g
Mass of x formula units = 116.88g
x = 116.88g * 1 formula unit/58.44g
x = 2 formula units
Therefore;
116.88g of table salt (NaCl) contains two formula units
Answer:
There are 1.2044 × 10²⁴ formula units of NaCl in 116.88 g of table salt (NaCl)
Explanation:
A formula unit is an empirical formula of the smallest collection or number of atoms in an ionic or covalent combination from which a compounds formula can be established and which are used to represent the compound stoichiometrically
Sodium chloride is an ionic compound and is represented by the formula unit NaCl as it composed of ions and is not therefoe represented by a molecular formula
The given mass of the table salt, NaCl = 116.88 g
The molar mass of NaCl = 58.44 g/mol = The mass of 1 mole of NaCl
1 mole of NaCl contains one Avogadro's number or 6.022 × 10²³ formula units of NaCl,
∴ 58.44 g of NaCl contains 6.022 × 10²³ formula units of NaCl
116.88 g of NaCl will have (116.88/58.44) × 6.022 × 10²³ = 1.2044 × 10²⁴ formula units of NaCl
The number of formula units of NaCl in 116.88 g of table salt (NaCl) = 1.2044 × 10²⁴ formula units of NaCl.
Which describes farsightedness?
Distant objects are blurry.
Concave lenses can correct it.
hurrry plz
Objects appear larger when wearing corrective glasses.
Corrective glasses do not change apparent the size of objects.
To solve this we must have a claeas concept behind Farsightedness and nearsightedness. Therefore, distant objects are blurry, describes farsightedness. The correct option is option A.
What is farsightedness?Farsightedness (hyperopia) is a common visual issue in which you can clearly see far things but have fuzzy vision of nearer items. Your capacity to focus is affected by your degree of farsightedness.
Farsightedness is most usually caused by an eyeball that is too short or by a cornea (the transparent layer at the front of the eye) that is not curved enough. Light cannot focus directly on the retina due to these two issues. Light instead concentrates behind the retina, making close-up objects appear fuzzy.
Therefore, distant objects are blurry, describes farsightedness. The correct option is option A.
To know more about farsightedness, here:
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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
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Why is methanol written as ch3oh instead of ch4o?
Answer: Here comes the role of another formula, which we refer to as the structural formula and that is CH3OH for methanol. The structural formula gives us an additional information that carbon is attached to three hydrogen atoms and one oxygen atom.
Acid rain due to air pollution when water reacts with sulfur dioxide, nitric oxide, and carbon dioxide, causes
Answer:
Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
Explanation: