1,698 Answered Questions for the topic biochemistry

Biochemistry Science Biology Chemistry

05/20/21

question practice chemistry

1.      What is the greatest amount of sodium chloride in moles that can be made with 13 grams copper II chloride and 15 grams sodium nitrate? Which reactant is limiting? How many moles... more
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05/19/21

Consider the following reaction for the questions below: Ca + Br2 --> CaBr2
a. What type of reaction(s) is/are being represented by the chemical reaction above?b. Is this reaction an oxidation-reduction (redox) reaction?c. If this is a redox reaction, then identify the... more
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05/18/21

Assume that Silver Nitrate and Calcium Bromide are the starting substances (reactants) in the reaction.

a. Write a balanced chemical reaction betweenSilver Nitrate and Calcium Bromide. Be sure to include physical states.b. State the names of the products that are produced from this reaction.c. Write... more
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Biochemistry Science Biology Chemistry

05/18/21

This would be a huge help
1.      What is the greatest amount of magnesium oxide in moles that can be made with 6.3 mol Mg and 6.9 mol O2? Which reactant is limiting? How many moles of the excess reactant will be left after... more
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Biochemistry Science Chemistry

05/18/21

Practice question

How many moles of sodium sulfate are formed when 13.2 moles of sulfuric acid reacts with 30.6 moles of sodium hydroxide? Which reactant is limiting? How many moles of the excess reactant will be... more
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Biochemistry Science Chemistry

05/18/21

limiting reactions

2.   How many moles of sodium sulfate are formed when 13.2 moles of sulfuric acid reacts with 30.6 moles of sodium hydroxide? Which reactant is limiting? How many moles of the excess reactant will... more
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Biochemistry Science Chemistry

05/18/21

practice #3 questions
1.      What is the greatest amount of copper IV nitrate in moles that can be made with 24.3 mol copper II chloride and 20.9 mol sodium nitrate? Which reactant is limiting? How many... more
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Biochemistry Science Chemistry

05/18/21

Practice #2 questions
1.      What is the greatest amount of magnesium oxide in moles that can be made with 6.3 mol Mg and 6.9 mol O2? Which reactant is limiting? How many moles of the excess reactant will be left... more
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Biochemistry Science Biology Bio

05/16/21

The production of filtrate is carefully regulated so the volume remains the same (mls/hour) despite changes in blood pressure and level of hydration.

The production of filtrate is carefully regulated so the volume remains the same (mls/hour) despite changes in blood pressure and level of hydration. How then, does the body regulate the volume of... more
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Biochemistry Science Biology

05/16/21

. The arrangement of the blood vessels entering and leaving the glomerulus is unique to this system, how does this system of blood vessels differ to blood vessels in other tissues.

I need help with this question please
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05/16/21

I would just like to ask what happens to the charges (+2) on the salt of a heavy metal as it disrupts disulfide bridges.
like for example-CH2-S-S-CH2- + Hg2+ = CH2-S-Hg2+ and Hg2+-S-CH2 (were the salts retains its charges)or -CH2-S-S-CH2- + Hg2+ = CH2-S-Hg and Hg-S-CH2 (were the salts become... more
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Biochemistry Math Science Biology

05/14/21

Please help me with chemistry math problems: URGENT PLEASE ANSWER
What is the heat required to vaporize 90.8 g of liquid ethanol, C2H5OH, at its boiling point? The ΔH° of vaporization of ethanol is 39.3 kJ/mol. Use a molar mass with at least as many significant... more
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Biochemistry Science Chemistry

05/14/21

Practice #1 – Limiting Reactants in Moles
    How many moles of water can be produced with 4.3 moles of H2 and 5.6 moles of O2? Which reactant is limiting? How many moles of the excess reactant will be left after the... more
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Biochemistry Math Science Biology

05/13/21

please help me with chemistry heat math problems

The heat of fusion of ice is 335 J/g. Calculate the heat liberated when 118 g of water at 0°C is frozen.A. -39.5 kJB. 39.5 kJ    C. -2.84 kJD. 2.84 kJE. some other answer
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Biochemistry Math Science Biology

05/13/21

Please help ,e with chemistry heat math problem.

What is the heat required to melt 62.0 g of solid ammonia, NH3, at its melting point? The ΔH° of fusion of ammonia is 5.97 kJ/mol. Use a molar mass with at least as many significant figures as the... more
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Biochemistry Math Science Biology

05/13/21

please help me with chemistry heat math problem.

What is the heat required to melt 77.4 g of solid diethyl ether, (C2H5)2O, at its melting point? The ΔH° of fusion of diethyl ether is 7.66 kJ/mol. Use a molar mass with at least as many... more
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Biochemistry Math Science Biology

05/13/21

Please help me with chemistry math problems

What is the heat required to vaporize 90.8 g of liquid ethanol, C2H5OH, at its boiling point? The ΔH° of vaporization of ethanol is 39.3 kJ/mol. Use a molar mass with at least as many significant... more
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Biochemistry Math Science Biology

05/13/21

please help me with chemistry and heat
Calculate the amount of heat needed to melt 2.0 kg of iron at its melting point (1809 K) given that: ΔHfus = 13.80 kJ/mol.A. 27,600 kJB. 25,000kJ    C. 494 kJD. 27.6 kJ
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Biochemistry Math Science Biology

05/13/21

please help me with chemistry and heat

What is the heat required to vaporize 54.3 g of liquid ammonia, NH3, at its boiling point? The ΔH° of vaporization of ammonia is 23.4 kJ/mol. Use a molar mass with at least as many significant... more
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Biochemistry Science Biology Anatomy

05/13/21

How cells give shape to our body?

I had a query from almost an year. How do cells of a part of our body, let's say hands, know in what shape to make the hand grow? For example how do the cells know that after the joint near... more
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05/12/21

ASAP: Please show all work : Use the data in the table below to calculate the value of the standard molar entropy S°, for B2 (g) at 25°C. 
(c) Use the data in the table below to calculate the value of the standard molar entropy S°, for B2 (g) at 25°C. Please show all workSubstance: Standard Molar Entropy, S° (J/Kmol)AB(g) 217.9AB2(g)... more
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05/12/21

Which of the following can be determined about ∆So for the reaction?
A student conducts a reaction at 298 K in a rigid vessel and the reaction goes to completion. The temperature of the reaction vessel drops during the reaction. Which of the following can be... more
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05/12/21

PLEASE HELP *Which of the following pairs of conditions are needed to construct a similar cell that generates the highest cell potential?
Fe2+(aq)+Zn(s)→Fe(s)+Zn2+(aq)E°cell=+0.32VA galvanic cell generates a cell potential of +0.32V when operated under standard conditions according to the reaction above. Which of the following pairs... more
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Biochemistry Chemistry Chem

05/12/21

Calculate the molarity (M) of 450. mL (4.50 x 10^2 mL) of NaBr solution prepared by dissolving 20.50g NaBr
A) 0.443 MB) 4.34 MC) 0.450 MD) 4.43 M
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Biochemistry Chemistry Chem

05/12/21

What is the volume of 0.2550 M HCI solution reqiured to completely neutralize 15.50 mL of 0.2110 M NaOH?
A) 12.83 mLB) 15.5 mLC) 18.73 mLD) 12.38 mL
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