Answer:
what happened when they removed the limescale?
Explanation:
All atoms are positively charged, with the number of protons exceeding the number of electrons. negatively charged, with the number of electrons exceeding the number of protons. neutral, with the number of protons equaling the number of electrons.
Answer:
Yah, it's true.
because protons are represented as helium (²4He) which are positive.
electrons are represented as 0-1e which is negative
100gm of a 55% (M/M) nitric acid solution is to be diluted to 20% (M/M) nitric acid.
How many liters of water should be added to the starting solution?
Volume of H₂O added = 175 ml
Further explanationGiven
100 gm of a 55% (M/M) and 20% (M/M) nitric acid solution
Required
waters added
Solution
starting solution
mass H₂O = 45%=45 g
%mass of H₂O in new solution = 100%-20%=80%
Can be formulated for %mass H₂O :
[tex]\tt \dfrac{45+x}{100+x}=80\%\\\\45+x=0.8(100+x)\\\\45+x=80+0.8x\\\\35=0.2x\rightarrow x=175~g[/tex]
For water mass=volume(density = 1 g/ml)
So volume added = 175 ml
Choose all the answers that apply.
Multicellular organisms _____.
are made of more than one cell
are made of only one cell
reproduce by mitosis
have differentiated cells
reproduce through the union of sperm and egg cells
Answer:
a. Are made of more than one cell.
Explanation:
I majored in Chemistry
Answer:
a. Are made of more than one cell.
Explanation:
Which molecules is converted directly to acetyl CoA without the intermediate step of being converted first to pyruvate
Answer:
Fatty acids
Explanation:
Acetyl coA is a compound vital for the process of cellular respiration in the mitochondria. It is the starting material of the kreb's cycle or TCA cycle, which takes place in the mitochondria. During the metabolism of glucose (glycolysis), a molecule called PYRUVATE is first synthesized before becoming acetyl coA in the mitochondrion.
However, the metabolism of FATTY ACIDS (monomers of lipids) directly gives rise to acetyl coA without first becoming pyruvate. The fatty acids molecule undergo Beta- oxidation to produce acetyl coA, which enters the TCA cycle to continue cellular respiration.
Which term best describes this reaction? O addition. O Condensation. O elimination. O substitution
Answer:
addition
Explanation:
because you add the two chlorides by breaking the carbon carbon double bond
What is the electron configuration for sulfur?
A. 1s2 2s2 2p6 3s2 3p4
B. 1s2 1p6 2s2 2p6 3s2
C. 1s2 2s2 2p6 3s2 3p3 4s1
D. 1s2 2s2 2p6 3p1 3d5t
Answer:
A. 1s2 2s2 2p6 3s2 3p4Explanation:
i hope it helps :)
Answer:
1s2 2s2 2p6 3s2 3p4
Explanation:
below
A _____________ is formed when water empties into a lake or ocean
Answer:
a delta
Explanation:
he place where a river enters a lake, larger river, or the ocean is called its mouth. River mouths are places of much activity. As a river flows, it picks up sediment from the river bed, eroding banks, and debris on the water. ... When large amounts of alluvium are deposited at the mouth of a river, a delta is formed.
Why are biogeochemical cycles important?
Earth is a closed system. That means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on Earth ( Blank) . So, it is essential that biogeochemical cycles
(Blank) these materials as they move through Earth's subsystems.
Answer:
These cycles are called biogeochemical cycles because they include a variety of biological, geological, and chemical processes. Many elements cycle through ecosystems, organisms, air, water, and soil. ... The biogeochemical cycles transport and store these important elements so that they can be used by living organisms.
What does dehydration cause?
Dehydration can lead to a loss of strength and stamina. It's a main cause of heat exhaustion. You should be able to reverse dehydration at this stage by drinking more fluids. If dehydration is ongoing (chronic), it can affect your kidney function and increase the risk of kidney stones.
[I copied this from the internet, but hope this helps!]
Which of the following salts has a 3 to 2 ratio of cations to anions?
O Barium Nitride
O Barium sulfide
Barium chloride
O Barium oxide
Explanation:
kind of ion formed (anion or cation) and the size of the ionic charge. ... O-‐2 oxide. S-‐2 sulfide. N-‐3 nitride. P-‐3 phosphide. Table 3.1. Common, simple anions. It is critically important that you distinguish between ...
Ions and Ionic Compounds – Introductory Chemistry – 1st Canadian Edition - BC Open Textbooks
opentextbc.ca › chapter › ions-and-ionic-...
The formula Na 2Cl 2 also has balanced charges, but the convention is to use the lowest ratio of ions, which ... For the ionic compound between magnesium cations (Mg 2+) and oxide anions (O 2−), again we need only ...
[PDF] Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND THE MOLE FORMULAS: A chemical formula shows the elemental composition of a sub
www.eiu.edu › eiuchem › forms › t...
Ba2+ barium. HSO3. – hydrogen sulfite. MnO4. – permanganate. Al3+ aluminum. SO4. 2– sulfate. NO2. – nitrite. Sn2+ tin(II). HSO4. – hydrogen sulfate. NO3. – nitrate. Sn4+ tin(IV). S2O3. 2– thiosulfate. OH– hydroxide.
Symbols and Charges for Monoatomic Ions
www.edu.xunta.es › portal › Nomenclature
Cs+ cesium ion O2- oxide. Be2+ beryllium ion S2- sulfide. Mg2+ magnesium ion Se2- ... one K+ and one Cl¯ are required. The resulting formula is KCl. Example 3: Write the formula from the following name: barium
Barium chloride salts has a 3 to 2 ratio of cations to anions. thus option C is correct.
what are the properties of barium chloride ?Barium Chloride an inorganic salt which is composed up of barium cations (Ba2+) and chloride anions (Cl–), otherwise named as Barium Muriate or Barium dichloride.
It is a white solid , water-soluble, hygroscopic and gives a slight yellow-green color to a flame, extensively used in the industry mainly The sulfate is used in white paints where as Barium chloride is poisonous in nature.
It is soluble in water which dissociate into barium cations and chloride anions in its dissolved state, However, the solubility of this compound in water is temperature-dependent.
For more details barium chloride, visit
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The force of gravitational attraction between two objects depends on the distance between the objects and their_____ 1. Buoyancies 2. Temperature 3. Masses 4. Shapes
Answer:Newton's law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them.
Objects with greater mass have a stronger force of gravity between them. ...
Objects that are closer together have a stronger force of gravity between them.
Explanation:
hope it helps
Answer:
masses
Explanation:
Identify the reaction type shown and describe the clues that were used to identify it. Fe2O3 + 2SiO2 → Fe2Si2O7
The type of reaction of Fe2O3 + 2SiO2 → Fe2Si2O7 would be that it is a synthesis reaction. It is a type of chemical reaction in which two or more simple substances combine to form a more complex product.
Answer:
The type of reaction of Fe2O3 + 2SiO2 → Fe2Si2O7 would be that it is a synthesis reaction. It is a type of chemical reaction in which two or more simple substances combine to form a more complex product. Hope this answers the question.
Explanation:
Proteins are
A) built in the nucleus by DNA and transported to the ribosomes.
B) converted from nucleic acids to amino acids in the nucleolus.
C) made on ribosomes and then transported to golgi appartus.
D) created in the nucleus and then shipped to the parts of the cell where they are needed
Answer:
I would say B
Explanation:
If I'm wrong I apologize, have a good day
[tex] \huge \mathfrak \red{hello...}[/tex]
[tex] \blue{The \: correct \: answer \: is \: (C).}[/tex]
Thanku...Which of the following is most likely to occur due to severe winds during a hurricane?
Answer:
a
Explanation:
Answer:
A
Explanation:
Ethyl alcohol evaporates faster then water, why?
Explanation:
as alcohol evaporates at much faster rate compared with water due to its lower boiling temperature (82 compared to 100 degree Celsius), it is able to carry away more heat from the skin. this means for a given amount of time much more alcohol evaporates than water.
hope it helps you
Calculate the mass of .0605 moles of crystalline sucrose. Sucrose is C12 H22 O11 . The molar mass is __________ g/mole. Show your work below and record your answer.
Answer:
20.7g/mol
Explanation:
Zn + I2 ---> Znl2
Determine the theoretical yield of the product if 2g of Zn is used
Answer:
Mass = 9.58 g
Explanation:
Given data:
Mass of Zn = 2g
Theoretical yield of ZnI₂ = ?
Solution:
Chemical equation:
Zn + I₂ → ZnI₂
Number of moles of Zn:
Number of moles = mass/molar mass
Number of moles = 2g / 65.38 g/mol
Number of moles = 0.03 mol
Now we will compare the moles of Zn and ZnI₂.
Zn : ZnI₂
1 : 1
0.03 : 0.03
Mass of ZnI₂:
Mass = number of moles × molar mass
Mass = 0.03 mol × 319.22 g/mol
Mass = 9.58 g
In the following image, atoms are represented by colored circles. Different colors represent different
types of atoms. If atoms are touching, they are bonded.
Which of the following boxes shows a mixture of elements and compounds?
A. D
B. C
C. B
D. A
PLS I NEED HELP ITS IMPORTANT I AM GIVING 25 POINTS HELP PLEASE. I NEED IT FAST
Why is it important for cells to be able to turn genes on and off? Select ALL Correct reasons!
Question 2 options:
A. so the cell is not too chaotic
B. so the cell can respond to the environment
C. so the cells can grow uncontrollably
D.so the cell does not waste energy
Answer:
B
Explanation: Since you need this quick, its because it needs to respond to the environment. I dont remember the exact term
What type of bonding exists between the carbon atoms to create diamond ?
Answer:
Covalent bonds.
Explanation:
Diamond is organized in a giant lattice structure with strong covalent bonds between carbon atoms. Each carbon atom forms 4 bonds. Explanation: Each carbon atom has four electrons in its outer shell, all of which form covalent bonds that are strong and hard to break.
(03.06 HC)
The boiling point of bromine is 59 °C. Which of the following best predicts the boiling point of iodine monochloride, a polar compound?
Group of answer choices
Lower than 59 °C because ionic bonding in bromine is stronger than covalent bonding in iodine monochloride.
Lower than 59 °C because dipole-dipole interactions in iodine monochloride are weaker than in bromine.
Higher than 59 °C because dipole-dipole interactions in iodine monochloride are stronger than dispersion forces in bromine.
Higher than 59 °C because ionic bonding in iodine monochloride is stronger than H-bonding in bromine.
Answer:
higher than 59 c because dipole- dipole interactions in iodine monocholoride are stronger than dispersion forces in bromine
The boiling point is the temperature at which the pressure of the liquid is equal to the vapor pressure. The b.p of iodine monochloride will be higher than 59 °C because dipole-dipole interactions are stronger. Thus, option C is correct.
What is a dipole-dipole interaction?A dipole-dipole interaction is the type of electrostatic attractive force that exists between the positive and the negative side of the polar molecule. They are strong interactions between polar molecules.
The Iodine monochloride (ICl) has a higher boiling point as compared to bromine as the former is a polar molecule with a dipole-dipole bond. The bromine shows the dispersion forces that are the weakest forces.
The polar molecules have differences in their electronegativities that make them have strong dipole interactions. As a result, will need higher temperatures to break bonds.
Therefore, option C. ICl will need a higher boiling temperature than bromine due to the presence of strong dipole forces.
Learn more about dipole interactions here:
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Silicon has 2 isotopes, Silicon-28 with an abundance of 90% and Silicon-30 with an abundance of 10%. Find the AAM for Silicon.
Answer:
RAM
[tex]RAM = (mass \: of \: ^{28} Si \: \times \%abundance) + (mass \: of \: ^{30} Si \: \times \%abundance) \\ RAM = (28 \times 90\%) + (30 \times 10\%) \\ RAM = 25.2 + 3 \\ RAM = 28.2[/tex]
Why are masks important?
Answer:
It acts as a filter to prevent as much germs, or chemicals/substances, as possible from entering your immune system through your breathing. This is whether you're in a lab or in a grocery store with a pandemic going around. Not only does it protect you but it also protects those around you by filtering any germs you may already have in your system and preventing them from passing on to another person. That is why you should always wear your mask over your mouth and your nose.
Explanation:
Hope this helps. Have a great day. May it be filled with joy and happiness. Please, stay safe and wash your hands.
What type of bond is formed between sodium and sulfur
Answer:
The Bond would Be ionic
Explanation:
Thier electronegativites are way to differnt so Sulfur would steal from Sodium
TOPICAL ASSINMENT 2
1. If 25cm' of O.IM H,SO, solution neutralised a solution containing 1.06g anhydrous sodium carbonate in
250cm. of solution, calculate the molarity and the volume of the sodium carbonate solution used. (3mks)
The molarity = 0.04 M
The volume = 6.25 ml
Further explanationGiven
25cm³ of 0.1 M H₂SO₄
1.06g Na₂CO₃ in 250cm³ of solution
Required
the molarity and the volume of Na₂CO₃
Solution
Molarity of Na₂CO₃ :
[tex]\tt \dfrac{1.06/106~mol}{0.25~L}=0.04~M[/tex]
Reaction
H₂SO₄ + Na₂CO₃ ⇒Na₂SO₄ + H₂O + CO₂
mol H₂SO₄ = 25 x 0.1 = 0.25 mlmol= 2.5 x 10⁻⁴ moles of Na₂CO₃
The volume of solution used :
[tex]\tt V=\dfrac{n}{M}=\dfrac{2.5.10^{-4}}{0.04}=6.25.10^{-3}~L=6.25~ml[/tex]
The southern United States experiences periodic occurrences of severe cold and drought conditions. Which weather phenomenon most likely causes this and why?
The weather phenomenon that most likely causes periodic cold is:
La NinaThis is caused by the:
Jet stream which moves to the south sideIn the Southern United States, there is a weather phenomenon which occurs when there is only a periodic occasion of severe cold. This happens because of what is called La Nina that occurs as a result of the movement of the jet stream.
Read more here:
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Why do u wash the residue with distilled water
+20 points! Answer correctly. Wrong or irrelevant answers will be reported. Tysm in advance!
Answer:
To remove impurities
Explanation:
Impurities may react with other chemicals if you are still continuing with the experiment.
There is an equal number of protons and __________ in a neutral atom.
A. electrons
B. neutrons
C. protons
D. elements.
the answer is electrons
SHOW WORK
A hummer weighs 3.2 tons, what is the weight in pounds (lbs)?
PLEASE ANSWER FAST DUE IN 2 MINUTES
The gas released by animal into the environment is ______
Answer:
Carbon dioxide gas
Explanation:
When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere.