4,374 Answered Questions for the topic Science

05/07/21

chemistry question
Which cation is a weak acid?Na+Ba2+Mn4+
Follows • 2
Expert Answers •1

05/07/21

Chemistry problem
A voltaic cell will generate voltage ifthe half-reactions and concentrations in each half-cell are identicalthe redox reaction has a negative ΔG°the half-reaction with the more negative E° is the... more
Follows • 2
Expert Answers •1

05/07/21

Chemistry question help
Which pair of compounds will form a buffer?HNO2 and LiNO2HCl and NaClH2SO3 and MgBr2
Follows • 2
Expert Answers •1
Science Math Chemistry

05/07/21

please help me with chemistry
Iron has a specific heat of 0.450 J/g·°C. How much energy is required to raise the temperature of 435 g of iron from 43.0°C to 180.0°C? -------kJ
Follows • 2
Expert Answers •1
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
Follows • 2
Expert Answers •1
Science Math Chemistry

05/07/21

please help me with chemistry

The sign for ΔH of the SURROUNDINGS if an endothermic reaction is taking place isA. surroundings is (-)ΔHB. surroundings is (0)ΔH    C. surroundings is (=)ΔHD. surroundings is (+)ΔH
Follows • 1
Expert Answers •1
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    
Follows • 1
Expert Answers •1

05/07/21

please help me with chemistry

Calculate the heat produced when 0.170 moles of boric acid, H3BO3 is produced.B2H6 (g) + 6H2O(l) → 2H3BO3(s) + 6H2(g) + 184 kJ
Follows • 1
Expert Answers •1

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
Follows • 2
Expert Answers •1
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
Follows • 2
Expert Answers •1

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
Follows • 1
Expert Answers •1

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 ?
Follows • 2
Expert Answers •1

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 ?
Follows • 2
Expert Answers •1

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
Follows • 1
Expert Answers •2

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
Follows • 2
Expert Answers •2

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
Follows • 1
Expert Answers •1
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
Follows • 1
Expert Answers •1
Science Math

05/06/21

A car travels 300 km south for 4 hours.What is its velocity?
Follows • 0
Expert Answers •1
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
Follows • 2
Expert Answers •1

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
Follows • 1
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
Follows • 1
Expert Answers •1

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
Follows • 1
Expert Answers •2

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.