Answers
Answer:
x=1.4*10^9
or choice a
Hope this helps and please mark me brainliest! <3 >//<
Explanation: Use pemdas
Do the exponents first then do what’s inside the parentheses and multiply them by each other
Related Questions
how many atoms are in 1.7 mols of CHF3
Answers
Given :
Number of moles of CHF₃ is 1.7 .
Solution :
We know, 1 mole of any complex contains 6.022 × 10²³ molecules.
Let, 1.7 moles of CHF₃ contains n numbers of molecules.
So, n = 1.7 × 6.022 × 10²³ molecules
n = 10.2374 × 10²³ molecules
n = 1.0237 × 10²³ molecules
Hence, this is the required solution.
In the decomposition of iron(III) oxide, four moles of iron are produced for every two
moles of iron(III) oxide decomposed. If four moles of iron(III) oxide decompose, how
many moles of iron are produced?
Answers
Answer: 8 moles of Fe
Explanation:
If 2 moles oxide give 4 moles Fe, so 4 moles oxide gives 8
What does the 2 represent inH2
Answers
Answer:
dihydrogen monoxide. The 2 is the subscript for H symbolises the presence of 2 Hydrogen atoms.
Explanation:
Answer: If we want to represent two atoms of hydrogen, instead of writing H H, we write H2.
Explanation:
The subscript "2" means that two atoms of the element hydrogen have joined together to form a molecule. A subscript is only used when more than one atom is being represented. ... Some more common molecules and their chemical formula.
There is a 2 percent defect rate at a specific point in a production process. If an inspector is placed at this point, all the defects can be detected and eliminated. The inspector would cost $10 per hour and could inspect units in the process at the current production rate of 48 per hour.
If no inspector is hired and defects are allowed to pass this point, there is a cost of $11 per defective unit to correct the defects later on.
Assume that the line will operate at the same rate (i.e., the current production rate) regardless of whether the inspector is hired or not.
a. If an inspector is hired, what will be the inspection cost per unit? (Round your answer to 3 decimal places.)
Inspection cost per unit _____________$
b. If an inspector is not hired, what will be the defective cost per unit? (Round your answer to 3 decimal places.)
Defective cost per unit _____________$
c. Should an inspector be hired based on costs alone?
Answers
Answer:
A) $0.208 per unit
B) $0.220 per unit
C) An inspector should be hired
Explanation:
percentage of defect rate = 2% = 0.02
cost of inspector = $10 per hour
production rate = 48 per hour
cost of not hiring an inspector = $11
A) Determine the inspection cost per unit if an inspector is hired
= cost of inspector / production rate
= 10 / 48 = $0.208 per unit
B) Determine the defective cost per unit if an Inspector is not hired
= cost of not hiring an inspector * percentage of defect rate
= 11 * 0.02
= $0.220 per unit
C) Inspection cost < defective cost i.e. $0.208 < $0.220 hence an inspector should be hired
What is the volume of 1.2 moles of neon gas at STP
Answers
Answer:
26.9 L.
Explanation:
Hello there!
In this case, since the ideal gas equation is able to provide us the volume of neon in 1.2 moles by considering the STP conditions (1.00 atm and 273.15 K) via its mathematical definition:
[tex]PV=nRT[/tex]
We first need to solve for V in the aforementioned equation:
[tex]V=\frac{nRT}{P}[/tex]
So we plug in to obtain:
[tex]V=\frac{1.2mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1.00atm}\\\\V=26.9L[/tex]
Best regards!
there is no such thing as a universal solvent- explain? I’ll mark brainiest!!!
Answers
Answer:
A true universal solvent does not exist. Although water is considered to be a the "universal solvent" it only dissolves other polar molecules. It does not dissolve nonpolar molecules, including organic compounds such as fats and oils. It is only called so because it can dissolve many more than other liquids.
How did Dmitri Mendeleev arrange the periodic law?
a. Each set of elements was arranged in special columns based on their mass.
b. Each set of elements was arranged in special columns based on their diameter.
c. Each set of elements was arranged in special periods based on their qualities.
d. Each set of elements was arranged in alphabetical order.
Answers
Answer:
a. Each set of elements was arranged in special coloumns based on their mass.
solve this .......,..,.,.,..,.,,.,.,.,.,.,.,.,.,..,.,.,.,.z.,.,.,.,..,.,.,.,.,,.,.,.,
Answers
Answer: Molecular formula of copper (II) bromide is [tex]CuBr_2[/tex]
Molecular formula of aluminium (III) nitrate is [tex]Al(NO_3)_3[/tex]
Molecular formula of calcium (II) phosphate is [tex]Ca_3(PO_4)_2[/tex]
Molecular formula of iron (III) sulphide is [tex]Fe_2S_3[/tex]
Molecular formula of mercury (II) chloride is [tex]HgCl_2[/tex]
Molecular formula of magnesium (II) acetate is [tex](CH_3COO)_2Mg[/tex]
Explanation:
The name of the ionic compounds is written by writing the name of the cation first followed by its oxidation state in round brackets and then the name of the anion is written without any suffix. Thus the cation is written first followed by the oxidation state and then the anion.
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral compound.
Molecular formula of copper (II) bromide is [tex]CuBr_2[/tex]
Molecular formula of aluminium (III) nitrate is [tex]Al(NO_3)_3[/tex]
Molecular formula of calcium (II) phosphate is [tex]Ca_3(PO_4)_2[/tex]
Molecular formula of iron (III) sulphide is [tex]Fe_2S_3[/tex]
Molecular formula of mercury (II) chloride is [tex]HgCl_2[/tex]
Molecular formula of magnesium (II) acetate is [tex](CH_3COO)_2Mg[/tex]
The diagram below shows the different phase transitions that occur in matter. Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid. Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1? 2 3 4 5
Answers
Answer:
4
Explanation:
Got it right edge 2021
Answer:
4 or C
Explanation:
i took the quiz
Please help, and if you could also give me a step by step that would be awesome!!
Answers
Answer:
4.4 g
Explanation:
Step 1: Write the balanced equation
Cu + 4 HNO₃ ⇒ Cu(NO₃)₂ + 2 NO₂ + 2 H₂O
Step 2: Calculate the moles corresponding to 3.2 L of NO₂ at STP
At standard temperature and pressure, 1 mole of NO₂ occupies 22.4 L.
3.2 L × 1 mol/22.4 L = 0.14 mol
Step 3: Calculate the moles of Cu needed to produce 0.14 moles of NO₂
The molar ratio of Cu to NO₂ is 1:2. The moles of Cu needed are 1/2 × 0.14 mol = 0.070 mol.
Step 4: Calculate the mass corresponding to 0.070 moles of Cu
The molar mass of Cu is 63.55 g/mol.
0.070 mol × 63.55 g/mol = 4.4 g
why do gasses expand more than solid for the same increase in otemparature
Answers
Have you ever eaten a coin?
Answers
Answer:
yes
Explanation:
bc i wanted to know how they taste btw they taste like metal not good 5/10
might try again but not recommended
my favorite one is a quarter probably
7. Consider an element with 2
electrons on the 1st shell and 4
electrons on the 2nd shell. What
element is likely to have that Bohr
model?
Answers
Answer:
Carbon (C)
Explanation:
The electron configuration of Carbon is 2-4.
question is in picutree eee eee e e
Answers
Answer:
its is a or c I'm more confident in a though
How many moles of SO3 are produced when 1.5 mol of O2 react with SO2?
Answers
Answer:
3 mole O2
Explanation:
Need balanced equation first: O2 + 2SO2 --> 2SO3
assuming SO2 is in excess,
1.5 mol O2 (2moles SO3/1mole O2) = 3 mole O2
What is the number of nitrogen molecules that reacted with excess hydrogen to make 2x10^10 molecules of ammonia
Answers
According to stoichiometry and mole concept,1×10¹⁰ molecules reacted with excess hydrogen to make 2 x 10¹⁰ molecules of ammonia.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations.
In the given example, as 1 molecule of nitrogen produces 2 molecules of ammonia
∴2 x 10¹⁰ molecules of ammonia will be produced when 2 x 10¹⁰×1/2=1×10¹⁰ molecules .
Thus, 1×10¹⁰ molecules reacted with excess hydrogen to make 2 x 10¹⁰ molecules of ammonia.
Learn more about stoichiometry,here:
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100 g of milk has the following composition:
4.7 g of carbohydrates, 5 g of minerals, 3.8 g of proteins, and 3.3 g of lipids.
1. Calculate the energy value in Kcal of 100 g of milk.
2. Deduce this energy in Kj.
3. Calculate the energy value in 225 g of milk.
Given:
lg of carbohydrate provides 3.75 Kcal.
ig of lipid provides 9 Kcal.
lg of protein provide 4 Kcal.
Answers
Answer:
Explanation:
SADOPOAKAWAASDASWDWSDWAA
HELP!!!! Which of the following substances is a major component in acid rain?
A) KOH
B) NH3
C) SO2
D) NaOH
Answers
SO2 is known as sulfur dioxide.
The below information about acid rain and SO2’s involvement is from epa.gov:
“Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.”
Hope this helps!
Answer:
(C) SO2.
SO2 is known as sulfur dioxide.
The below information about acid rain and SO2’s involvement is from epa.gov:
“Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.”
Explanation:
What is the symbol for the following ion electronic structure: 1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 3d^ 10 4s^ 2 4p^ 6 4d^ 10 5s^ 2 with an atomic number of 50?
Answers
Answer:
Symbol is Sn
Explanation:
From the periodic table, the element that has an ionic number of 50 and electronic structure of 1s² 2s² 2p^(6) 3s² 3p^(6) 3d^(10) 4s² 4p^(6) 4d^(10) 5s² is known to be Tin.
The symbol for Tin is written as Sn
Answer:
The atomic number is 48 and Tin has an electron of 48 which means 2 electrons were donated during the chemical reaction.
The element is referred to as Tin(Sn) and the symbol is Sn²⁺
Tin is referred to as a metal . All metals lose or donate electrons to become positively charged because their outermost shells are usually very far from the nucleus.
On the other hand non metals accept or gain electrons to become negatively charged as their outermost shells are closer to the nucleus.
Tin however donated two electrons as a metal and became positively charged hence the symbol Sn²⁺
Read more on https://brainly.com/question/21480973
explain how liquid can enter the gas phase without reaching its boiling point
Answers
hope this helps :)
Asphalt, like the desert, ___ the sun's energy, causing higher temperatures
A.absorbs
B.reflects
Answers
Answer: A. absorbs
Explanation:
The water vapor that condenses low to the ground and becomes visible is known as ___________.
Answers
I’m sorry if I’m wrong but I’m pretty sure that’s the answer:)
the number of particles of 0.2
mole
Answers
Answer:
There are 1.205x10²³ particles in 0.2 moles.
Explanation:
In order to convert from moles to number of particles we need to use Avogadro's number, which states the number of particles contained in 1 mol:
0.2 mol * 6.023x10²³ particles /mol = 1.205x10²³ particlesThus, there are 1.205x10²³ particles in 0.2 moles.
pls help fast answer
Answers
Answer:
freezing
Explanation:
when objects are in liquid for, molecules are not moving as rapidly as when an object is in solid form
Answer:
evaporation :)
Explanation:
What is the normal pH range of a Base?
Answers
Answer:
7.35 - 7.45
Explanation:
The pH scale ranges from 0 (strongly acidic) to 14 (strongly basic or alkaline). A pH of 7.0, in the middle of this scale, is neutral. Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually, the body maintains the pH of blood close to 7.40.
Hope this helps
Answer:
The normal pH range if a base is more than 7
Explanation:
Basideally the pH range goes from 0-14 in which
Acidic range is :0-7
Neutral :7
Base : 7 - 14
I would like to get some examples of Newtons 1st,2nd, and 3rd Law
Answers
Answer:
Explanation:
Newtons 1st law:
If you slide a hockey puck on ice, eventually it will stop, because of friction on the ice. It might also stop if a hockey player places their stick in front of it.
Newton's 2nd law:
If the mass of an object is 20 kg and it's acceleration is 5 m/s, the force acting upon it is (m*a or 20*5) 100 N.
Another example that proves that force is dependent upon mass is that if you were to move a car and a truck (that were both previously stationary) at the same speed, the car would take less force/effort to move than the truck.
Newton's 3rd law:
If a book on a table, the table is exerting a force on it that is equal and opposite to the force of gravity.
If two soccer balls of the same mass collide, one moving and one stationary, then they would both apply an equal and opposite force onto each other, causing the moving ball to stop and the previously stationary ball to move at the speed of the previously moving ball.
What is the mass number of an atom that has 35 electrons, 45
neutrons and 35 protons?
Answers
Answer:
Answer is 80
Explanation:
Mass number is equal to the number of protons + neutrons = 45 + 35 = 80
If a radio station transmits on AM 610, how many hertz (Hz) is the frequency of the wave? (Remember that kHz = kilohertz.)
Answers
Answer:
610,000
Explanation:
When the radio station transmits on AM 610, so the number of hertz (Hz) is the frequency of the wave is 610,000.
Calculation of the number of hertz:Since radio station transmits on AM 610
We know that
1khz = 1000 hz
So it should be like
= 610 (1000)
= 610,000
hence, When the radio station transmits on AM 610, so the number of hertz (Hz) is the frequency of the wave is 610,000.
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Which of the following compounds are held together by ionic bonds? Select all that apply.
O A. CaCl2
OB. CH4
OC. Naci
D. sodium bromide
E. carbon dioxide
F. FeBr3
Answers
Answer:
Explanation:
All of above except carbon dioxide
The compound that is held together by ionic bonds are CaCl₂, NaCl, sodium bromide, and FeBr₃. The correct options are A, C, D, and F.
What are ionic bonds?Ionic bonds are electrovalent bonds. These bonds are formed when two or more atoms lose electrons or gain electrons to form an ion. Ions are opposite charges that attract each other. Ionic bonds are formed in both metals and non-metals.
CaCl₂, calcium chloride, is formed between metals and non-metals. Some more examples are NaOH – Sodium Hydroxide, NaHCO₃—Sodium Hydrogen Carbonate, etc.
An example is NaCl, is sodium has 11 atomic numbers. Chloride has 6 electrons in its outermost shell. They will share electrons with each other to make the noble gas configuration.
Thus, the correct options are A. CaCl₂, C. NaCl, D, sodium bromide, and F. FeBr₃.
To learn more about ionic bonds, refer to the link:
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Copy and complete these equations plz I’ll give brainliest
Answers
Answer:
MgSO4 + 6H2O ----> MgSO4.6H2O
2C + O2 -----> 2CO
2CuO + C ------> 2Cu + CO2
C2H6 -----> C2H4 + H2
ZnO + C -----> Zn + CO
NiCO3 ------> NiO + CO2
CO2 + 2H2 ------> CH4 +O2
NaOH + HNO3 -----> NaNO3 + H2O
C2H6 --------> C2H4 + H2
Explanation: