4,365 Answered Questions for the topic Science

Science Math Chemistry

05/07/21

please help me with chemistry

Given an exothermic reaction, which of the following is true?A. ΔH reaction is (+), ΔH surroundings is (-)B. ΔH reaction is (+), ΔH surroundings is (+)    C. ΔH reaction is (-), ΔH surroundings is... more
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Science Math Chemistry

05/07/21

Please help me with honors chem
Identify the following chemical reaction as exothermic or endothermic: CaCO3 + 178 kJ --> CaO + CO2A. EndothermicB. Exothermic    
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05/06/21

Worksheet chemistry

Practice Question #6 – Gram to Gram Mole Ratio Stoichiometry1.     Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. In can... more
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Science Chemistry

05/06/21

WORKSHEET stoic

____ CH4+___O2---->____CO2+____H2O1)How many moles of oxygen gas are needed to produce 2.14 moles of water?Anewer ____ mol2) How many moles of oxygen can be formed from 67 grams of carbon... more
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05/06/21

WORKSHEET stoic

____ CH4+___O2---->____CO2+____H2O1)How many moles of oxygen gas are needed to produce 2.14 moles of water? Anewer ____ mol2) How many moles of oxygen can be formed from 67 grams of carbon... more
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05/06/21

SCIENCE HELP NEEDED!!

Can You physically remove the different parts of a compound ? Can you vary the amounts being used when creating a mixture ?
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05/06/21

i need help! chemistry needed

What is the correct term to describe table salt which has a chemical formula of NaCl (Sodium Chloride)?An AtomA MoleculeAn ElementA Compound a compound right ?
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05/06/21

Clinical nursing question
A nurse summons you too assess a 300-pound, one-day post-operative cholecystectomy patient. He has no fever, has no productive cough, and has a negative chest x ray. He is, however, reluctant to... more
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05/06/21

chemistry I would appreciate it so much
__ P4O6 ---> ____ P4+_____ P2O41) How many moles of diphosphorus tetroxide are produced from 3.65 moles of tetraphosphorus hexoxide?Anewer ____ mol2) How many moles of tetraphosphorus hexoxide... more
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05/06/21

chemistry I would appreciate it so much

__ P4O6 ---> ____ P4+_____ P2O41) How many moles of diphosphorus tetroxide are produced from 3.65 moles of tetraphosphorus hexoxide?Anewer ____ mol2) How many moles of tetraphosphorus hexoxide... more
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Science Chemistry

05/06/21

Based in Magnesium being the limited reactant, calculate the theoretical yield and Percent yield. Then determine the average percent yield in the two trials.

Data Trial 1 Trial 2 Mass of empty crucible with lid 26.694g 26.693g Mass of Mg metal, crucible, and lid 26.953g 27.002g Mass of MgO, crucible, and lid  27.117g 27.198g Magnesium is the... more
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Science Math

05/06/21

A car travels 300 km south for 4 hours.What is its velocity?
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Science Chemistry

05/06/21

The freezing point of an aqueous solution with NaCl is -0.20 C. Calculate the molality concentration of the solution.
please, help me how to get its freezing point
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05/06/21

Practice Question #6 – Gram to Gram Mole Ratio Stoichiometry
1.     Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. In can be prepared from copper sulphate and hydriodic acid by the... more
Follows • 1
Expert Answers •2

05/06/21

Practice Question #6 – Gram to Gram Mole Ratio Stoichiometry
1.     Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. In can be prepared from copper sulphate and hydriodic acid by the... more
Follows • 1
Expert Answers •2

05/06/21

Practice Question #6 – Gram to Gram Mole Ratio Stoichiometry
1.     Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. In can be prepared from copper sulphate and hydriodic acid by the... more
Follows • 1
Expert Answers •1

05/06/21

Please I need this :) I would really love someone to help me

Copper I iodide , Cul , is not stable enough to last long in storage , so it is generally made just prior to use . In can be prepared from copper sulphate and hydriodic acid by the following... more
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Expert Answers •1

05/06/21

Practice worksheet

Copper I iodide , Cul , is not stable enough to last long in storage , so it is generally made just prior to use . In can be prepared from copper sulphate and hydriodic acid by the following... more
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05/06/21

Practice #6 Gram to gram Ratio Stoichiometry
Copper I iodide , Cul , is not stable enough to last long in storage , so it is generally made just prior to use . In can be prepared from copper sulphate and hydriodic acid by the following... more
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Science Geology

05/06/21

Year 9 geology plate tectonics question

One study found that the Nazca plate is moving faster than the mantle beneath it.Evaluate how this piece of evidence would help you decide why the plate is moving faster than the mantle. Use either... more
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Science Geology

05/05/21

Year 9 Geology question
At some divergent boundaries, volcanic eruptions along mid-ocean ridges are continually creating new oceanic crust. This causes the seafloor to slowly spread away from the ridges. But the Earth's... more
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Science Math Calculus

05/05/21

Finding the interval of convergence of the integral
Let f(x)= ∑n=1∞ (-1)^n (x/4)^n. Find the series and interval of convergence for the integral from 0 to x of f(t)dt
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05/05/21

GRAM to gram mole ratio stoichemetry pratice #6 worksheet
GRAM TO GRAM MOLE RATIO STOICHMETRYCopper I iodide , Cul , is not stable enough to last long in storage , so it is generally made just prior to use . In can be prepared from copper sulphate and... more
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Science Chemistry

05/05/21

In a Ag/Cu Galvanic cell, Ag(s) and Cu(s) electrodes were placed in a solution with 0.50 M Ag^+ and 0.50 M Cu^2+. What can be concluded about the cell potential?
In a Ag/Cu Galvanic cell, Ag(s) and Cu(s) electrodes were placed in a solution with 0.50 M Ag+ and 0.50 M Cu2+. What can be concluded about the cell potential?The cell potential is the same as the... more
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Science Math Chemistry

05/05/21

A voltaic cell contains one half-cell with zinc electrode in a Zn^2+(aq) solution and a copper electrode in a Cu2+(aq) solution.
A voltaic cell contains one half-cell with zinc electrode in a Zn2+(aq) solution and a copper electrode in a Cu2+(aq) solution. At standard conditions, E° = 1.10 V. Which condition below would... more
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