Answer:
Hydrogen finds a variety of application due to its dual nature. Following are some important uses of hydrogen:
Hydrogen is used in the synthesis of ammonia and the manufacture of nitrogenous fertilizers.
Hydrogenation of unsaturated vegetable oils for manufacturing vanaspati fat.
It is used in the manufacture of many organic compounds, for example, methanol.
Hydrogen chloride is a very useful chemical and is prepared from hydrogen.
Hydrogen can reduce many metal oxides to metals by metallurgical processes.
Hydrogen is used as rocket fuel in many space research activities.
Hydrogen fuel is being experimented within the automotive industry with hydrogen fuel cells.
A decrease in temperature reduces the volume of gas
a
Chemical Change
b
Physical Change
Answer:
Chemical change.
Hope this helps you.
please answer quick...................
Answer:
3). C
Explanation:
When inter-nuclear distance [ atomic radius ] is smaller, the nuclear attraction has a greater magnitude.
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What are some possible molecules that could have the empirical formula, XY2Z?
Answer: a
Explanation:
i took the test
name gaseous element in period 2 group 16?
Answer:
mark me as a brainlist answer
Explanation:
Oxygen
yo help me do this asap pls
Answer:
l think it's hydrogen chloride
Explanation:
What would the car weigh on Earth with a gravitational pull of 9.8 N/kg?
Answer:
Explanation:s the gravitational field strength on Earth's 9.8 N kg?
The gravitational field strength of the Earth is 10 N/kg (10 newtons per kilogram).
which atom is indicated by this configuration - [Ne] 3s^1
Explanation:
Neon is [Ne] 3s2 3p3 = 1s2 2s2 2p6 3s2 3p3.
Quais são as fórmulas das bases formadas pelos respectivos cátions Au3+, Fe2+, Pb2+, Na+ e Mn4+? *
Answer:
This is an English server, sorry
Explanation:
Based on the equation, how many grams of Br2 are required to react completely with 36.2 grams of AlCl3? 2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2 (5 points)
a) 65.2 grams
b) 69.8 grams
c) 72.1 grams
d) 76.5 grams
Explanation:
basically, you'll just have to convert the given grams into moles, convert that into moles of Br, and then convert it again into grams of Br
The amount of gram of [tex]Br_{2}[/tex] will be 65.1 grams in equation [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].
What is gram?The definition of a gram was given as the mass of one cubic centimeter of pure water at 4 degrees Celsius.
Calculation of amount of [tex]Br_{2}[/tex]
The given equation is [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].
The mass of [tex]Br_{2}[/tex] = Count of bromine molecule × molar mass
The mass of [tex]Br_{2}[/tex] = 0.4072 × 159.8
The mass of [tex]Br_{2}[/tex] = 65.08 mol.
The amount of gram of [tex]Br_{2}[/tex] will be 65.1 grams in equation [tex]2AlCl_{3} + 3Br_{2}[/tex]→ [tex]2AlBr_{3} + 3Cl_{2}[/tex].
Therefore, the answer will be option (a).
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Melting is
A. state of matter change from solid to gas.
B. state matter change from solid to liquid.
C. state of matter change from gas to liquid.
D. state of matter change from liquid to solid.
Answer:
b is correct
Explanation:
Answer:
B. state matter change from solid to liquid.
Explanation:
Melting happens when a solid turns (melts) into a liquid.
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Which of these things are NOT listed in the periodic table?
Element Name or Symbol
Atomic Weight
Atomic Number
Atomic Orbital Radius
An Erlenmeyer flask holds
19.0 g of a liquid that takes
up a volume of 25.0 mL.
What is the density of the
liquid?
Taking into account the definition of density, the density of the liquid is 0.76 [tex]\frac{g}{mL}[/tex].
First of all, density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
In this case, you know:
mass= 19 gvolume =25 mLSo, replacing in the definition of density:
[tex]density= \frac{19 g}{25 mL}[/tex]
Solving:
[tex]density= 0.76 \frac{g}{mL}[/tex]
Finally, the density of the liquid is 0.76 [tex]\frac{g}{mL}[/tex].
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brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResultsWhat common group name is carbon in on the periodic table?
Answer: it's group 14
Explanation:
The common group name for carbon is Group 14 (IVa) on the periodic table.
Which two subatomic particles have the same mass but do not have the same charge?
A. None of these
B. Neutrons and quarks
C. Electrons and neutrons
D. Protons and neutrons
Answer:
d
Explanation:
b/ce The strong force effects produce a mass that is essentially independent of the kinds of quarks involved, so this mass contribution will be the same for the proton and neutron.
What does a virus inject into a cell?
Answer:
The virus's genome is uncoated from the protein and injected into the host cell.
Explanation:
briefly explain how to separate a mixture of water, kerosene, sawdust and nahso4?
Answer:
Use filtration method lol.
what amount (in moles) is present in 2.0g of sodium hydroxide,NaOH
Answer: 0.050 moles of NaOH
Explanation: The molar mass of NaOH is 40.0g/mole
2.0g/40.0g/mole = 0.050 moles (2 sig fig)
Nitrogen is inactive gas, why?
because it doesn't react easily with other elements it requires high heat and other things
An element has an atomic number of 16. An ion of this element has a 2-charge. How was the ion formed?
Answer: The answer is ‘a neutral atom gained 2 electrons’
Explanation: Because electrons are negatively charged and adding 2 extra would make the ion negatively charged by 2
Answer:
The answer to all the quiz questions are
Explanation:
1. Which statement describes the number of protons in each atom of an element?
*The number of protons is given by the atomic number, which increases by one moving from left to right across each row of the periodic table.*
2. An element has an atomic number of 16. An ion of this element has a 2– charge. How was the ion formed?
*A neutral atom gained 2 electrons.*
3. Rubidium has an atomic number of 37 and a mass number of 85. How many protons, neutrons, and electrons does an ion of rubidium with a 1+ charge have?
*37 protons, 48 neutrons, and 36 electrons*
4. There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true?
*Their atomic masses differ.*
5. Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?
*5*
In what situation would you most likely need to use a computer to analyze data?(1 point)
When you have collected a lot of data most likely need to use a computer to analyze data. Option B is correct.
What is the analyzed data?The analyzed data is a system in which the unmanaged data or the messy data can be arranged in a recognizable sequence for the better study of something for which data is to be maintained.
The computer is needed for the process as the computer has some special characters to maintain tables according to alphabets and according to the number and can be taken out anytime want.
Therefore, Option B is correct. When you have collected a lot of data most likely need to use a computer to analyze the data.
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Starches and sugars being broken down during energy production
a
Chemical Change
b
Physical Change
Answer:
A. Chemical ChangeExplanation:
When starches and sugars are being broken down during energy production it represents chemical change.[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
Solid solid soluton example
Explanation:
rice and rice coatssalt and sugarsand and mudwheat flour and corn flourcan someone answer this
Answer:
[tex]{ \underline{ \sf{solubility}}}[/tex]
Acetylene, C2H2, burns according to the following reaction: C2H2 5O2 --> 4CO2 2H2O. Suppose 1.20 g of C2H2 is mixed with 3.50 g of O2 in a closed, steel container, and the mixture is ignited. What substances will be found in the mixture left when the burning is complete
C2H2 will be left when the burning is complete.
The equation of the reaction is; 2C2H2 + 5O2 --> 4CO2 + 2H2O
The number of moles of C2H2 reacting is = 1.20 g/26 g/mol = 0.046 moles
The number of moles of O2 is = 3.50 g/32 g/mol = 0.109 moles
Since;
2 mole of C2H2 reacts with 5 moles of O2
x moles of C2H2 reacts with 0.109 moles of O2
x = 2 mole × 0.109 moles/5 moles
x = 0.044 moles of C2H2.
It then follows that C2H2 is the reactant in excess so C2H2 will be left when the burning is complete.
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Please help me with this chemistry
Answer:
platinum is the correct answer
Answer:
it would be made of platinum
Explanation:
Write a word equation for the chemical reaction.
I’ll brainlist.
Answer:
potassium hydroxide + sulfuric acid → potassium sulfate + water.
Explanation:
Hope it helps.. if yes, plz mark me as brainliest
I need help with this question
Answer:
ok ok ok okbokvjhkeokkd
Someone plz help me :(
Answer:
Descriptive investigations use careful observations and measurements to develop findings. Science journals, science logs, and field notebooks are some of the tools scientists use to gather information for descriptive investigations.
Explanation:
In store A: A box of cotton candy costs 1 dollar, 12 boxes cost 12 dollars. In store B: 12 boxes cost 48 dollars. How much does each box cost in store B?
Answer:
4
Explanation:
If there is 12 boxs that cost $48, you need to divide the 12 boxs into the $48 to see how many time 12 goes into it to see how much it is. So 48 divided by 12 is 4.
A statement that describes what scientists expect to happen every time under a given set of conditions is call a scientific
Answer:
law
Explanation:
it is called a scientific law