05/03/21

Tell whether or not ​sin w is an identity: cos w * csc^2w
what would it be in terms of sine and cosine? please answer as soon as possible :)
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05/03/21

The average thickness of the ice covering on arctic lake can be modeled by the function T(x) =9cos(Pi/6 x)+15 where T(x) is the average thickness in month x (x=1 -> January) 
The average thickness of the ice covering on arctic lake can be modeled by the function T(x) =9cos(Pi/6 x)+15 where T(x) is the average thickness in month x (x=1 -> January) A) how thick is the... more
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05/03/21

Solving problems using Snell's Law
A double pane surface consists of a layer of oil on top of a layer of water (index o1.333). A red laser beam (650nm) moves between the two surfaces, passing through the oil at a speed of 0.71c and... more
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05/02/21

I need help with this question!
Determine the mass of aluminum (Al) produced in the reaction if 30.00 grams of magnesium (Mg) was consumed. 2AlPO4 (aq) + 3Mg (s) ⟶ 2Al (s) + 1Mg3(PO4)2 (aq)
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05/02/21

Calculate the number of moles of oxygen gas (O2) needed to fully react with 9.75x1023 molecules of ethane (C2H6). 2C2H6 (g) + 7O2 (g) ⟶ 4CO2 (g) + 6H2O (g)
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05/02/21

Limiting Reactants
If 3.00 grams of copper(II)nitrate reacts with 4.35 grams of sodium hydroxide, what is the limiting reactant? a. sodium nitrate b. sodium hydroxide c. copper (II) hydroxide d. copper (II) nitrate
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05/02/21

How many moles of phosphorus are required to react with 100 g oxygen?

The equation is: 4P+5O2=2P2O5
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05/02/21

I need so much(actual)help with my chemistry homework as soon as possible please

1.) S   + 6 HNO3 → H2SO4 + 6 NO2 + 2 H2OIn the above equation, how many grams of water can be made when 4.4 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is a... more
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05/02/21

Hello I have been ignored by tutors please actually help me with my chemistry homework
1.) S   + 6 HNO3 → H2SO4 + 6 NO2 + 2 H2OIn the above equation, how many grams of water can be made when 17.7 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is a... more
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05/02/21

Consider the following reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) It takes 15.7 L of pure oxygen gas at STP to react completely with a certain sample of aluminum. What mass of aluminum reacted?
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05/01/21

How many molecules are in 0.500 mol of CO2?
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05/01/21

How many moles of S are there in 1.8x10^24 S atoms?
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05/01/21

How many atoms are in 2.12 mol of silver?
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05/01/21

How much sodium chloride will be produced?
If 11.54 grams of pure sodium is reacted in the presence of 21.4grams of chlorine gas, how much sodium chloride will be produced?  a. 32.9grams b. 35.3grams c. 29.4grams d. 9.51grams
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04/30/21

I need help with this question... Thank you
A 3.8-mol sample of KClO3 was decomposed according to the equation How many moles of O2 are formed assuming 100% yield? a. 5.7 mol b. 1.9 mol c. 3.8 mol d. 2.5 mol e. 3.2 mol
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04/30/21

Please someone respond and actually help me with my chemistry homework quickly please

1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2OIn the above equation, how many grams of N2 can be made when 7.7 moles of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole... more
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04/30/21

If 3.50 moles of butane are burned according to the following balanced equation how many grams of carbon dioxide are formed. 2C4H10+13O2=>8CO2+10H2O
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04/30/21

Chemistry is my worst subject

Magnesium reacts with iodine gas at high temperatures to form magnesium iodide, 2Mg + I2 à MgI2a, What mass of MgI2 can be produced from the reaction of 5.15 g Mg and 11.7 g I2?  Answer:     grams... more
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04/30/21

Need help, this is confusing

If 50.6 g of O2 is mixed with 50.6 g of H2 and the mixture is ignited, what is the maximum mass of water that may be produced?                         2H₂ + O₂ → 2H₂OAnswer   grams H2O (Round your... more
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04/30/21

Chemistry Question...06
How many formula units of sodium chloride (NaCl) salt is produced from 18.0 g of sodium (Na)? 2 Na (s) + Cl2 (g) --> 2 NaCl (s)A. - 4.71 x 1023 formula units of NaClB. - 9.43 x 1023 formula... more
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04/30/21

The distance x where the light rays converge is called the a) Focal length b) Polarization length c) Dispersion length d) Node length
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04/30/21

The bending of different wavelengths of light at different angles when light passes from one medium to another is the result of a) Interference b) Polarization c) Refraction d) Dispersion
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04/30/21

The bending of light when it goes from one medium to another is called a) Interference b) Polarization c) Refraction d) Dispersion

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04/30/21

Hydrazine (N_2H_4) decomposes to produce N_2 and NH_3. How many molecules of NH_3 will be formed if 90 molecules of N_2H_4 decompose into N_2 and NH_3?
Hydrazine () decomposes to produce  and . How many molecules of  will be formed if 90 molecules of  decompose into  and ?
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04/30/21

The intensity of radiation at 0.1 meters of a source is 300 mCi, what is the intensity at 5 meters?
Very unsure of the setup of the problem?
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