What is the correct formula
for tin(II) chloride dihydrate?
the answer is A. SnCl2 . 2H2O
what is the mass of 3.0 x x times 10^23 atoms of neon?
Answer:
10.09 grams
Explanation:
First you need to know the number of moles you are dealing with.
If you know that each mole has 6.022x10²³ of something (in this case of atoms), you can divide 3x10²³ atoms of neons by 6.022x10²³ to obtain the number of moles.
You have 0.5 moles of Neon, so then by the periodic table, you see that the molar mass of neon is 20.18g/mol, so by each mole you have 20.18 grams of neon. Multiply 20.18 grams by 0.5 moles and you got 10.09 grams of Neon
cellus
A student measures the acidity of a solution and
concludes that it has a pH of 2.70. However, the
seller claims that its pH is 3.20. What is the
percent error in the student's measurement?
Answer:
15.63%
Explanation:
The formula of error percentage is:
([experimental value-real value]/real value)100%
You divide the subtraction of the absolute value of experimental value (the one you got during a experiment) and the one that's "proven" to be right by again, the proven value. You got a decimal and all you have to do is multiply it by 100%
Answer:
on acellus the answer is 16%
I hate acellus
Explanation:
hydrofluoric acid
What’s the formula
Hydrofluoric acid/Formula
______________________
HF
______________________
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If the energy of the H–H bond is 452 kJ/mol. The energy of the O=O bond is 598 kJ/mol. The energy of the O–H bond is 367 kJ/mol, which bond would be the strongest? Which bond would be the weakest?
Taking into account the bond energy, the O=O bond is the strongest and the O–H bond is the weakest.
The bond energy is the average total energy that would be released by the formation of a mole of chemical bonds, from their constituent fragments (all in the gaseous state).
In other words, the normal or standard bond enthalpy is defined as the change in enthalpy or heat released, under standard conditions of 1 atmosphere and 25ºC, that accompanies the reaction of formation of one mole of bonds from the isolated atoms in gaseous state.
The higher the bond energy, the stronger and more stable the bond will be.
So, taking into account all the previous, the O=O bond is the strongest and the O–H bond is the weakest.
Learn more about bond energy:
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Use the key above to interpret the following incomplete chemical reaction.
Select the statements at apply in order to complete the model. (Choose 3)
A) The number of atoms in the products must be equal to the reactants.
B) One diatomic oxygen should be removed from the reactant side.
C) One unbonded carbon atom should be added to the product side of the equation
D) One carbon atom and two oxygen atoms are needed to balance the equation.
E) One carbon dioxide molecule should be added to the product side of the equation.
Answer:
Carbon dioxide molecule
Answer:a , d ,e
Explanation:
jusy took quiz
Which tool would give the most precise measurement of 15 milliliters of water
A graduated cylinder
_________________
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which acids are found In lemon and milk
Answer:
lemon- citric acid
milk- lactic acid
Answer:
lemon=citric and malic acids.
milk=Lactic Acid
Explanation:
Definition for starch in science ?
Answer:
Starch is a polysaccharide comprising glucose monomers joined in α 1,4 linkages. orStarch is a long-chain polymer of glucose molecules joined together. orA starch is a complex polysaccharide made up of a large number of glucose units joined together by glycosidic bonds.Explanation:
starch, a white, granular, organic chemical that is produced by all green plants. Starch is a soft, white, tasteless powder that is insoluble in cold water, alcohol, or other solvents.
Starch is amongst the most abundant plant products and is a mixture of two polymers, amylose and amylopectin. During food processing starch is transformed by hydrothermal treatments. ... The structure of starch is also influenced by specific and non-specific interactions with other food constituents and ingredients.
Which of the following liquids has the highest viscosity
A water
B oil
C milk
D honey
Answer:
honey has the highest viscosity
According to the given option, honey is the liquid that has the highest viscosity. So, the correct option is D.
What do you mean by Viscosity?Viscosity may be defined as the effects of a liquid by probity of which an internal resistance comes into play when the liquid is in movement and resists the comparable motion between its distinct layers.
Among all the given options, honey possesses more strong intermolecular attractive forces that result in the high compaction of particles in the honey.
After honey, Oil is more viscous followed by milk, and then water.
Therefore, the correct option for this question is D.
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Explain why some substances travel further than others.
Larger molecules take longer to move up the chromatography paper or TLC plate, whereas smaller molecules are more mobile. Likewise, the polarity of the molecules can affect how far the spots travel, depending on the type of solvent used.
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A teacher places a cup of coffee onto an electronic balance at the front of the science laboratory. The teacher then adds three large teaspoons of sugar to the coffee. The volume of the coffee does not appear to increase. What happens to the mass displayed on the front of the balance?
Answer:
it will be same as before
Answer:
The mass on the balance stays the same
Explanation:
.
9.
a
What is the energy of a wave having a frequency of 5.71 x 1013 Hz?
Answer:
[tex] \huge{3.783 \times {10}^{ - 19} \: J}[/tex]
Explanation:
The energy of the wave can be found by using the formula
E = hfwhere
E is the energy
f is the frequency
h is the Planck's constant which is
6.626 × 10-³⁴ Js
From the question we have
E = 6.626 × 10-³⁴ × 5.71 × 10¹³
We have the final answer as
[tex]3.783 \times {10}^{ - 19} \: J[/tex]
Hope this helps you
The Statue of Liberty is composed of copper. The smallest particle of any amount of copper is A) an atom. B) an element. C) a compound. Eliminate D) a molecule.
an atom because its the smallest thing in the entire world and in all orgnaisms
Part A
What question is being asked through this scientific investigation?
(I didn’t know what subject so sorry, also only answer if u have an answer.)
Answer:
How will the ingredients effect the fermentation of each bottle? What will happen to the bottles and balloons when fermentation occurs?
Explanation:
Draw a table with two columns labelled physical change and chemical change .Write the following changes in the correct column .
water boiling
a car rusting
petrol burning
beer fermenting
ice cream melting
wind blowing
milk turning sour
seawater evaporating
sugar dissolving in tea
food being digested
bleach cleaning a dirty cloth
Answer:
Explanation:
P = Physical Change
C = Chemical Change
water boiling P
a car rusting C
petrol burning C
beer fermenting C
ice cream melting P
wind blowing P
milk turning sour C
seawater evaporating P
sugar dissolving in tea P
food being digested C
bleach cleaning a dirty cloth
the method of mass production that developed during the nineteenth century was a process that
Answer:
Relied on the use of power driven machinery
Explanation:
Its because the machines would increase the mass productivity of goods
Write the shape of s and p-orbials.
s-orbitals are spherical, while p-orbitals are similar to a 3-D infinity symbol. I have attached an image of the comparison.
Which of these codes is best for creating websites?
The most used codes for the creation of websites are CSS and HTML.
What is a code?A code can be defined as the basic unit that composes a website. This implies that by using a code you can create a website from scratch and by the end of the process you should have a functional and complete website.
What codes are used?In website creation, the most common codes are CSS and HTML.
HTML: This is the most common code used and also one of the easiest to understand and use.
CSS: This code is not as popular as HTML but it is still a very popular code used by many people creating websites.
Note: This question is incomplete because the options are not given; due to this, I answered it based on general knowledge.
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please please answer this question!!!!!!
cell membrane - phospholipd bilayer
pigmented - chloroplasts
chloroplasts - oval shaped with two membranes
rectangular or cubed - plant cell
nucleus - control centre
hope that's what you are looking for
the two stages that take place during distillation are. a.evaporation is folloeed by condensation. b.condensation followed by evaporation
Answer:
evapiration followed by condensation
magnesium carbonate and sulphuric acid react to form
Answer:
magnesium sulfate + water + carbon dioxide
Explanation:
How is the polarity of a bond different from the polarity of a molecule?
Answer:
A polar bond is one where the charge distribution between the two atoms in the bond is unequal. A polar molecule is one where the charge distribution around the molecule is not symmetric. It results from having polar bonds and also a molecular structure where the bond polarities do not cancel.
Explanation:
Which chemical reaction occurs between steps 1 and 5?
The ribosomes of plant cells are sites for the synthesis of
(a) ATP (b) nucleic acids (c) sugars (d) proteins
Answer:
Proteins
Explanation:
Their Function Formation Encoded in mRNA into polypeptide chains of amino acids that produces protein
The ribosome of plant cells are sites for the synthesis of proteins. The correct option is (d).
What are ribosomes?Ribosomes are organelles that take part in the synthesis of proteins. The prokaryotic cell's ribosomes are smaller than the eukaryotic cell's ribosomes.
Currently, ribosomal RNA is a component of the cell's ribosome or protein-building machinery. The process of making proteins, or translation, is carried out by ribosomes.
The ribosome, which translates the genetic code generated in mRNA into an amino acid sequence, is universally responsible for protein synthesis. The two ribosomal subunits, small and big, come together to form the full ribosome, which is used to produce proteins.
Therefore, the correct option is (d) proteins.
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people tint their car windows to stop what
Answer:
Reflection
Explanation:
Answer:
b
Explanation:
It accounts for the differences in the behavior of particles in different states. *
Answer:
Matter
Explanation:
Solids, liquids, and gases are the three types of matter that can be found in the world around us today. In solids, all of the particles are close together. They move more in liquids, but they are spread out in gas.
What does the electron configuration for the noble gases tell us about the elements in the
group
Answer:That all noble gases will have 8 valence electrons which makes a atom stable
Explanation:
Which statement does not identify a characteristic of antibodies?
A They are produced by the body in response to the presence
of foreign substances.
B They may be produced in response to an antigen.
© They are nonspecific, acting against any foreign substance in
the body.
D They may be produced by white blood cells.
Answer:
they are produced by the body in response to the presence of foreign substance
significance of symbol Mg
Answer:
Magnesium Magnesium is used in products that benefit from being lightweight, such as car seats, luggage, laptops, cameras and power tools. It is also added to molten iron and steel to remove sulfur. As magnesium ignites easily in air and burns with a bright light, it's used in flares, fireworks and sparklers.I hope this helps you !!