Answer:
The moderators are just there to delete relevant questions or answers but they aren't deleting the spammers .
Explanation:
Stay safe, stay healthy and blessed.
Have a good day !
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What does the big bang theory state
Name two other substances with giant covalent substances
Answer:
diamond, graphite (types of carbon) and silicon dioxide (silica).
Explanation:
Substances with giant covalent structures are solids with very high melting points. All the atoms are linked by strong covalent bonds, which must be broken to melt the substance.
PLEASE HELP ASAP!!!!WILL MARK BRAINLEST
If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, what would be the molarity of the solution?
Determine moles of solute:
Calculate molarity:
Answer:
If 50.0 grams of HCl were dissolved in enough water to make a solution with a total volume of 5.0 liters, then the molarity of the solution is 0.282M.
How do we calculate molarity?
Molarity of any solution will be calculated by using the below equation:
M = n/V, where
n = moles of solute
V = volume of solvent in L
Moles will be calculated by using the below equation:
n = W/M, where
W = given mass = 50g
M = molar mass = 35.45 g/mol
n = 50/35.45 = 1.41 moles
On putting values in the above equation, we get
M = 1.41mol / 5L = 0.282M
Hence required molarity of solution is 0.282 M.
Explanation:
what type of rock is the Wave made of?
What type of rock is the wave made of?
Answer: The Wave is a natural formation of ~sandstone rocks~
Convert these temperatures to Celsius:
a. 303 K
d. 45 K
303K − 273.15 = 29.85°C
45K − 273.15 = -228.1°C
How many grams of iron are in 3.2 moles of iron
Answer:
17.03052
Explanation:
thats the answer i got hope this helps at all
Which type of nucleus decays during a radioactive decay?
a. radioactive
b. light
c. regular
d. heavy
Radioactive decay of a nucleus is common in nuclei that are heavy
What is a radioactive nucleus?A radioactive nucleus is a nucleus that decays by spontaneous disintegration. It is common in Many nuclei that have atomic number above 82.
Hence, radioactive decay of a nucleus is common in nuclei that are heavy and are capable of breaking apart.
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what is the answer to this question? i do not know what the names are
The answer is Ethene.
Produced by heating natural gas.
Convert these pressures:
820 mm Hg =____ atm
206 kPa =
atm
0.6 atm =
kPa
1520 mm Hg = __ kPa
850 kPa =
mm Hg
15. The bird flu, also known as influenza A, is caused by a virus. Pneumonia, which can have similar symptoms to
influenza A, is caused by a bacterial infection. Which statement best summarizes the difference between these two
diseases?
O Viruses are living organisms while bacteria are not.
O Viruses are non-living organisms while bacteria are living.
O Bacterial infections are harmless to humans while viruses can be deadly.
Bacterial infections are harmful to humans while viruses can be beneficial.
You need to draw up oral syringes with 12.5 mg of diphenhydramine. The oral solution is available as 25 mg/10 mL. How many oral syringes can be filled from 4 ounces of solution
Answer:
24 oral syringes
Explanation:
What would happen if the student did not stop the development before the solvent reached the top of the paper
Answer:
The solvent would wash away the dye.
Explanation:
The solution will m ove to the top and you would not be able to calculate the Rf value that is com pared to the distance that a com ponent traveled in the stationary phase reached by the solvent.
Answer:
The solvent would wash away the dye.
Explanation:
The solution will m ove to the top and you would not be able to calculate the Rf value that is com pared to the distance that a com ponent traveled in the stationary phase reached by the solvent.
In order to be healthy, humans must consume a variety of amino acids. any animal product, such as eggs, milk, and meat, contains all of these amino acids. however, consumption of a wide variety of plant products will also supply the necessary amino acids. describe two different meals you could enjoy that contain only plant products. make sure to include at least five different plants in each meal. (10 points) plants produce grains, vegetables, and fruits. meal two
Dish of Cabbage, carrot, pea, cauliflower and brinjal are the meals we could enjoy that contain only plant products.
Describe two different meals you could enjoy that contain only plant products?
Cabbage, carrot, pea, cauliflower and brinjal are the five different plants based meals. In these meals, vegetables are used which are the parts of plant. We know that vegetables are very healthy and nutritive which can be get from plants.
So we can conclude that dish of Cabbage, carrot, pea, cauliflower and brinjal are the meals we could enjoy that contain only plant products.
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Drag each tile to the correct box a chemical reaction takes place in which energy is released arrange the reactions characteristics in order from start to finish
The characteristics of a chemical reaction are:
The lower energy of reactants → Transition state → High energy of products.
What is a chemical reaction?A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
The characteristics of a chemical reaction are :
Lower energy of reactants
↓
Transition state
↓
High energy of products
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What is the mass of NaCl required to make 160 grams of a 12% solution of NaCl in water?
18 grams
19 grams
22 grams
24 grams
Answer: 19 grams
Explanation:
percent by mass = (mass of part)/(mass of whole) * 100
this means that in this question, 12 = x/160 * 100, where x is the amount of NaCl.
this means 12/100 = x/160, and thus x = (160)(12/100)=19.2 grams
The closest option is B.
Answer:
Second Option: 19 grams
Explanation:
Total solution weight: 160 grams
percent of NaCl in the solution: 12%
You take these two numbers and multiply them with 12 being over 100:
160 * [tex]\frac{12}{100}[/tex] = 19.2 grams
and then just round to the nearest whole number: 19 grams
balance following equation
H2 + _02 → _H20
Answer:
2H2+O2=2H20
Explanation: Since there are 2 Oxygen in the reactants then there must be 2 Oxygen in the products, meaning there is a coefficient of 2 in front of H20 and that makes there be 4 Hydrogen, so adjust the reactants (2 H2)
Why do elements in the same group on the periodic table have similar
properties?
Answer:
because they possess the same number of electron at their outermost shell
When trees are cut down in a forest it increases the amount of runoff going into nearby streams and rivers true or false
Describe the quantitative characteristics of all chemical reactions. Explain how we can use these features to make quantitative predictions for a specific reaction.
Quantitatively, chemical reactions are determined by the reactant as well as product molecules.
What is chemical reaction?A chemical reaction will be preferred as a process that results in the chemical change of one group of chemical substances into another set of chemical compounds.
What is reactant and product?A reactant would be a material that's also present when a chemical reaction begins. Products are still the substance to the right of the arrow. A product is a material that remains after a chemical reaction has been completed.
Quantitatively, chemical reactions are determined by the reactant as well as product molecules.
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a 125.0 mg sample of an unknown, monoprotic acid was dissolved in 100.0 ml of distilled water and titrated with a 0.050 m solution of naoh. the ph of the solution was monitored throughout the titration, and the data were collected. determine the ka of the acid and identify the unknown acid.
data-
volume of oh- added (ml), ph:
0, 3.09
5, 3.65
10, 4.10
15, 4.50
17, 4.55
18, 4.71
19, 4.94
20, 5.11
21, 5.37
22, 5.93
22.2, 6.24
22.6, 9.91
22.8, 10.2
23, 10.4
Answer:
33,666
Explanation:
is the dictionary definition of a word.
is the feeling or idea associated with a word.
how many moles of carbon monoxide (co) in 112g?
Answer:
In CO there is one mole of Carbon and one mole of Oxygen so the number of atoms will be for two mols
Explanation:
Write down the names of subatomic particles and their masses in a.m.u with their unit charges.
Subatomic particle is the smallest particle than the atom
Explanation :-
An atom consist of three subatomic particle
They are electron , proton and neutron .
Proton ( p ) it is a subatomic particle with positive chargewhich is equal to electron charge and a mass of
[tex]1.67262 \times {10}^{ - 27} kg [/tex]
Electron ( e ) It is the subatomic particle with negative charge and a mass equal to
[tex]9.109 × {10}^{ - 31}kg [/tex]
Neutrons ( n ) - It is neutral subatomic particle which is the constituent of every atomic nucleus except hydrogen . Neutrons have no electric charge and a rest mass equal to
[tex]1.67493 \times {10}^{ - 27} kg[/tex]
slightly greater than that of electron
Explanation:
INTRODUCTION:
There are 3 main subatomic particles, they are:
ElectronsProtons NeutronsThe existence of the sub-atomic particles was proved by the fact that an atom is electrically neutral but it can be made to gain a positive or a negative charge. This means that an atom must contain tiny particles, each carrying either a positive or a negative charge.
These opposing charges balance each other under ordinary conditions to make an atom electrically neutral.
ELECTRONS:
Electrons were discovered in 1897 by J.J. THOMSON when he was studying cathode rays.An electron is denoted by:
[tex] \boxed{ _ {- 1 }e {}^{0} }[/tex]
Where,
0 = represents it's mass-1 = represents it's unit negative electrically charge.Properties of electrons:
An electron is a negatively charged particleThey are an integral part of all atomsThe properties of electrons are Independent of the nature of the gas in the discharge tubeAn electron has a mass of 9-108 x 10 g which is only 1/1837 of the mass of a hydrogen atom. Therefore, an electron is said to have negligible massAn electron carries one unit negative (-1) charge, which is equal to 1-602 x 10 coulombs.UNIT CHARGE OF Electrons:
9.1 × 10^(-28) gramsNEUTRONS:
In 1932, James chadwick discovered neutrons & it had no charge. Its denoted as [tex] _{0} n ^1[/tex]
PROPERTIES OF NEUTRONS:
Electrically a neutron is neutral, i.e it has no chargeNeutrons are present in the nucleus of an atomAtoms of the same element may differ in the number of neutrons leading to formation of isotopes.An atom of hydrogen contains only 1 proton and one electron but no neutron.
UNIT CHARGE OF IT:
1.676 × 10^(-24) gramsPROTONS:
An atom is electrically neutral Therefor the presence of the negatively charger electrons in an atom suggests that it must contain positively charged particles a well, otherwise an atom would not b electrically neutral.It is discovered by E. GOLDSTEIN.
It's denoted as [tex] _{+1} p ^1[/tex]
where 1 represents 1 a.m.u. and +1 represents 1 unit positive charge.
PROPERTIES:
A proton is a positively charged particle.The mass of a proton is 1.672 × 10^(-19). ie equal to the mass of an atom of hydrogenA proton carries 1 unit positive (+1) charge , and equals to 1.602 × 10^(-19) coulombs.>>>All elements contains electrons & protons.
Since an atom is electrically neutral, the number of electrons in an atom is equal to the mumber of protons in that atom. However, no two elements contain the same number of protons in their respective nuclei.
UNIT Charge:
1.6 × 10^(-24) grams.[All units I provided are a.m.u. .]
[tex] \rule{225pt}{2pt}[/tex]
Hope this helps :)
Which statement is true about molarity and percent by mass?
Answer:
99%
Explanation:
It have Full cream and it is yummy
At home, your parents replace your house lights with lower-watt bulbs. Is this energy conservation or energy sustainability? Explain
This is actually electricity
The replacing of house lights with lower-watt bulbs represents energy conservation not energy sustainability because energy conservation is the efficient use of energy without wasting it.
What is energy conservation?Energy conservations refer to the practice of using less energy for doing various activities. Turning off the light when you leave the room is the example of energy conservation.
So we can conclude that replacing of house lights with lower-watt bulbs represents energy conservation not energy sustainability because energy conservation is the efficient use of energy without wasting it.
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What are some of the benefits of being able to predict natural disasters and knowing when and where they might occur?
Which of these statements is false? The least reactive elements are in the far right column. Elements at the bottom of a column have more protons than elements at the top of a column. Elements on the left side of a row always have higher atomic mass than elements on the right side of that row. Elements along the steplike line have some properties of metals and some properties of nonmetals.
Answer:
Elements on the left side of a row always have higher atomic mass than elements on the right side of that row.
Explanation:
the answer I have above should be correct because it’s false so it’s the right answer.
An unknown substance weighing 50.0g was heated from 36.0 to 69.0. In this process, the substance absorbed 5890.0J of energy. What is the specific heat of the substance
which ph value is consistent with the indicator results
The color of the indicator will correspond to the pH values of either acidic or basic substances.
What are pH values and Indications?pH values are values which are obtained from taking the negative logarithm to base ten of the hydrogen ions concentration of a substance.
pH values of acidic substances are less than 7 while the pH of basic or alkaline substances are greater than 7.
An indicator is an organic dye which changes colour according to the pH of a substance.
Examples of indicators are methyl orange and phenolphthalein.
Therefore, the color of the indicator will correspond to pglh values of either acidic or basic substances.
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Question 3(Multiple Choice Worth 4 points)
(08.04 LC)
Which statement is true about a substance that has a pH value of 14?
O It is a weak base.
O It is a weak acid.
O It is a strong base.
O It is a strong acid.
A substance that has a pH value of 14 is a strong base because pH 8 to 14 represents base.
What the different pH reading indicates?The pH value 1 to 6 indicates acidic, 7 shows neutral whereas pH from 8 to 14 shows basic nature. pH 1 shows strong acid which becomes weak when it goes to 6 while on the other hand, pH 8 is a weak base which increases when it reaches to 14.
So we can conclude that a substance that has a pH value of 14 is a strong base because pH 8 to 14 represents base.
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Answer:
C. It is a strong base
Explanation:
pH 1 to 6 is acid (weaker)
pH 7 is neutral
pH 6 to 14 is base (stronger)
Which term is testable, a prediction, and can be supported or refuted by data?
