Which of the following is an example of a chemical element a. Salt B.water c.sugar d.sodium
Answer:
the answer is sodium
Explanation:
hope this helps
Which is needed to determine the amount of gravitational force between two objects?
A. weight and time
B. distance and mass
C. volume and mass
D. area and weight
Answer: B
Explanation:
B. Distance and Mass
Newton's Law of gravitation states [tex]F=\frac{GMm}{r^2}[/tex]
G being a constant
M being mass 1
m being mass 2
r being the distance between them from their center of mass
What is the molality of a solution that contains 5.10 mol KNO3 in 4.47 kg water?
How many molecules of water are produced by the combustion of 3.00 g of methane
the first element was full brittle and did not conduct heat
Answer:
non-Metals
Explanation:
What is white light made up of?
A. infrared light
B. ultraviolet light
C. seven colors of the rainbow
Answer:
The answer is C
Explanation:
hope this helps
:)
Answer:
C. Seven colors of the rainbow
Explanation:
when light enters a water droplet and then leaves it again, each different wavelength of light refracts at a slightly different angle. then, when the light is broken up, you can see all of the colors of the rainbow.
For Example, A Dark Tinted Window.
You can fit 25 drops of substance X on a penny and 12 drops of substance Y on a different penny. Explain the difference in terms of strength of IMF.
Answer:
In the experiment performed involving the number of liquid drops that a penny can hold, 25 drops of substance X can fit in a penny while only 12 drops of substance Y can fit on another penny because, substance X is more viscous than substance Y. Thus, the intermolecular forces present in substance X are stronger than those present in substance Y.
Explanation:
Intermolecular forces (IMF) are the forces which exist between the neighboring molecules of a a substance. These forces, though weaker than intramolecular forces which acts between neighboring atoms, they still are responsible for several differences in the physical properties of substances with comparatively similar molecular masses.
The three major types of intermolecular forces are, hydrogen bonding, dipole–dipole interactions and London dispersion forces.
The existence of intermolecular forces in molecules of substances results in increase in melting and boiling points, surface tension, capillary action, viscosity, as well as surface area of substances,
Viscosity, which is the resistance to flow offered by a liquid increases with increase in the intermolecular forces between the molecules of a liquid.
In the experiment performed involving the number of liquid drops that a penny can hold, 25 drops of substance X can fit in a penny while only 12 drops of substance Y can fit on another penny because, substance X is more viscous than substance Y. Thus, the intermolecular forces present in substance X are stronger than those present in substance Y.
How many grams is 40.48 moles of cobalt?
Answer:
2385.49 grams of cobalt.
Explanation:
1. Convert 40.48 moles of Co (cobalt) into grams (mass):
The molar mass of cobalt is 58.933195 g/mol.
[tex]40.48 mol Co = \frac{58.93 g/mol}{1 mol Co} = 2385.49 g[/tex]
What is the balanced chemical equation of CO2 + H2O = C2H5OH + O2?
of what does sand consist
Answer:
Sand is typically made mostly of varying amounts of material weathered from inland rocks and transported to the beach on the wind or in rivers, and/or shells and other hard parts precipitated out of the ocean water by marine organisms. Sand therefore records processes at a variety of timescales.
Explanation:
The manufacturer of an aerosol deodorant packaged in a 300 mL container plans to produce a container of the same size that will hold twice as much gas. How will the pressure of the gas in the new product compare with that of the gas in the original container?
Answer: It will get higher
Explanation: it’ll get higher because the pressure will increase
What is the relationship of rocks to minerals.
Rocks are minerals.
Minerals are rocks
Minerals are in rocks.
Rocks are in minerals.
Minerals are in rocks.
what sre the group 17 elements are known as
Answer:
Halogen
Explanation:
what is the difference between base alkali and acid in chemistry?
Answer:
Acids are sour in taste while bases have bitter taste for example Soap
Acids turn Blue litmus to Red While Bases turn Red litmus to Blue
Acids are Corrosive in concentrated form while bases Are non corrosive except concentrated form of NaOH and KOH
Answer:
1 . acid
a) acid are proton donors / electrons pair acceptors .
b) it have pH value < 7.
c) acids taste sour .
2 . base alkali
a) bases are proton acceptors/ electron pair donors .
b) it have pH value < 7 .
c) bases taste soupy .
Explanation:
may it helps you ....
How many moles of H2 gas are in 15 liters?
With 11 electrons how many electron shells does sodium have?
Answer:
3 Shells
Explanation:
2 electrons in shell one, 8 in shell two and only 1 in shell three.
Answer:
3 shells
Explanation:
Elements that have some properties of metals and some properties of nonmetals
Answer:
metalloids aka semimetals
Explanation:
Given the rate law R = k[X][Y]2 and the data in the chart, what is the value of the rate constant for the reaction?
A. 0.029
B. 0.52
C. 35
D. 52
Answer:
C.) 35
Explanation:
Answer:
35 is the correct answer (c)
Which of the following conclusions might a scientist make when fossils of two different species of very similar organisms are found in different layers of rock?
Question 2 options:
A. Both organisms had similar behaviors.
B. One organism was prey for the other organism.
C. One organism was ancestor of the other organism.
D. Both organisms lived around the same time.
Answer:
if its multiple, C and D, if not, C
Explanation:
brainliesttt?
One organism was ancestor of the other organism and both organisms lived around the same time is the conclusion made by scientist.
Who are fossil scientist?Fossil scientist are the specialists in studying the ancient fossils of animals and plants.
If fossils of two different species of very similar organisms are found in different layers of rock then it might be the possibility that one organism was ancestor of the other or both organisms lived around the same time. Because it is not necessary that if two species had the same organism then they have same behavior.
Hence, option (c) & (d) is correct.
To know more about fossil scientist, visit the below link:
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which of the following classification groups is the most specific? family or order
Can someone help with #6
Will mark brainliest too!
Answer:
okey brooooooooooooooo
no se ingles solo spanish
Explanation:
todoooooooooooooooooooooo bien bro
Select the correct answer.
What is the chemical name of the compound Ti2O3? Use the list of polyatomic ions and the periodic table to help you answer.
A.
titanium oxide
B.
titanium(II) oxide
C.
titanium(III) oxide
D.
titanium trioxide
Answer:
titanium(III) oxide is the name of Ti2O3
Ca+Cl2-->CaCl2 Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.
Answer:
Oxidation half
Ca -----> Ca2+ +2elecyrons
Reduction half
Cl2 + 2electrons ------> 2Cl-
Explanation:
Convert 4, 294 grams to pounds. Use the conversion factor 1 pound = 453.59 grams.
48g of methane was burned in an excess of air. What mass of carbon dioxide would be produced in the reaction assuming complete combustion? Use the information below to answer the question.
Answer:
132g
Explanation:
CH4= 12+4=16
moles= m/Mr moles=48/16=3 mol
CO2= Mr=44
there are the same number of moles as methane:
Mass= Mrxmoles
44x3=132g
The mass of the carbon dioxide produced by the combustion of the 48 g of methane is equal to 132 g.
What is the combustion reaction?Combustion reaction involves the complete oxidation of the hydrocarbon such reactions generally release only carbon dioxide and water as products.
A hydrocarbon undergoes combustion to produce carbon dioxide and water as the product. No other side products are formed in the combustion reaction.
The given combustion reaction of the methane can be written as follows:
CH₄ + 2 O₂ → CO₂ + 2H₂O
Given the amount of methane for combustion = 48 g
The molar mass of methane = 16g/mol
The molar mass of the carbon dioxide, CO₂ = 44g/mol
16 grams of methane produce carbon dioxide = 44g
The 48 grams of methane will produce CO₂ = (44/16) ×48 = 132 g
Therefore, the mass of 132 g of carbon dioxide is produced by the combustion of 48g of methane.
Learn more about combustion reactions, here:
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PLEASE HELP DECODE THIS
The element symbol for the element with the atomic mass of 183.84 amu: (B1)
A student built a simple fan using an electromagnet, a permanent magnet, and a fan blade. When she connects the electromagnet to one battery, the fan blade turns. What would most likely happen if she connected it to two batteries?
The fan blade would turn faster.
The fan blade would turn slower.
The fan blade would not turn at all.
The fan blade would turn in opposite direction.
Answer:
The fan blade would turn faster
Explanation:
Chemistry Cookie project
Answer:
What's the question?
Explanation:
Answer:
I dont understand, is there supposed to be a picture or question?
Explanation:
The atoms in a sample are close together but can side past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.
Which change of state is taking place
Gas to solid
Gas to liquid
Liquid to solid
Solid to liquid
A sulfur atom weighs twice as much as an oxygen atom, If a chemist has 12grams of oxygen atoms, how many grams of sulfur would contain the same number of atoms as in the sample of oxygen atoms?
Answer: 24
Explanation: multiply 12 with 2