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Science Chemistry Biochemistry Organic Chemistry

04/29/20

Calculate the boiling point elevation of a solution containing 43.8 g of glucose (C6H12O6) dissolved in 359.9 g of water. Calculate the freezing point depression for the same solution.

boiling point elevation = _____ degrees Celsiusfreezing point depression = ____ degrees Celsius

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Science Chemistry

04/28/20

how many grams of 206Hg will you have after 17.5 years?

210Pb has a half-life of 22.3 years and decays to produce 206Hg. If you start with 7.50 g of 210Pb, how many grams of 206Hg will you have after 17.5 years?The correct answer is 3.09But I keep... more

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Science

04/27/20

What question about the world around you could be answered using the scientific method?

must have a question with scientific method in it

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Science Biology

04/27/20

Fill in the genotypes for all 10 individuals on the pedigree attached. Use the letter A. This trait follows normal dominance rules. Aa shows the dominant trait.

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Science Chemistry

04/26/20

How many alpha and beta particles are emitted in the decay series?

When 222Rn (Z = 86) decays in a 5-step series the product is 210Pb (Z = 82). How manyalpha and beta particles are emitted in the decay series?I understand how to find the alpha particles I just... more

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Science Chemistry

04/26/20

Calculate E°(cell) for the reaction

Calculate E°(cell) for the reaction, 2 IO3-(aq) + 10 Fe2+(aq) <=> 10 Fe3+(aq) + I2(aq) given the reduction potentials:Fe3+(aq) + e- <=> Fe2+(aq) , E° = 0.87 V2 IO3-(aq) + 10 e-... more

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Science Biology

04/26/20

Health fitness and wellness

Define the key structures found in the skeletal system.

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Science

04/25/20

What is being measured during an experiment or the data

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Science Chemistry

04/25/20

Which of the following is completely true about the relationship between ΔG and T for this reaction?

For the reaction, Fe2O3 (s) + 3 H2(g) <=> 2 Fe(s) + 3 H2O(g), ΔG° = 53 kJ at 25 °C and ΔH° = 100 kJ. Which of the following is completely true about the relationship between ΔG and T for this... more

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Science Chemistry Chem Ap Chemistry

04/25/20

Rate of reaction question

I. Increasing the temperature increases the rate of a chemical reaction BECAUSE II. the activation energy is lowered. A) I is TRUE, II is FALSE B) I is FALSE, II is TRUE C) I and II are BOTH FALSE... more

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Science Chemistry

04/24/20

percentage of potassium iodide in solution

Question 1 If we mix 2.39g of unknown mixture containing potassium iodide with excess lead(II) nitrate and 1.21g of PbI2 precipitate forms what is the percentage of potassium iodide in the unknown... more

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Science Newtons Three Laws Ferris Wheel Physics

04/23/20

How does Newtons three laws work in a Ferris wheel

Hello, I am in the topic of newtons laws, i am creating an Amusement Park out of scraps, then you explain how the three law are used in them.For my first I have a Ferris Wheel, how would Newtons... more

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Science

04/23/20

In asexual reproduction, offspring are produced ________.

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Science

04/23/20

The cell that is formed when fertilization occurs is called a __________.

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Science Physics Ap Physics

04/23/20

AP Physics: All objects are placed at the top of a smooth incline and started simultaneously (symmetry axis) . In what order do they cross the finish line- and why?

Consider a race between the following objects: A: playground ball (hollow, heavy rubber ball aka sphere) B: lacrosse ball (small, solid rubber ball) C: segment of cylindrical metal lab pole--... more

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Science Chemistry Stoichiometry

04/22/20

What mass of iron(III) chloride is produced when 100.0 mL of 0.100 M solution of barium chloride is reacted with 50.00 mL of 0.150 M solution of iron(III) sulfate?What's the limiting, excess reactant?

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Science Chemistry Moles Stoichiometry

04/22/20

How many atoms are there in 0.228 moles of water?

using dimensional analysis?

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Science Chemistry Moles Stoichiometry

04/22/20

How many molecules of nitrogen are there in 7.55 moles of N₂?

using dimensional analysis?

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Science Chemistry

04/22/20

What is the percent composition for all the elements in ammonium sulfite? 4). % N 5). % H 6). % S 7). % O

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Science Chemistry

04/22/20

Chemistry question on net ionic equations! Not sure how to write it

What is the salt/ppt equation for AgNO3, Ag2SO4, BaCl2·2H2O, Na2SO4·10H20 and Ca(NO3)2?

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Science Physics

04/21/20

Push Mower Force (Physics)

An environmentally conscious physics student mows her lawn with a push mower, exerting a force of 187 N along the handle. How much force is actually being used to push the mower forward along the... more

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Science Chemistry

04/21/20

In the following reaction; 2 Mg(s) + CO2(s)  2 MgO(s) + C(s), how many grams of MgO can be produced from 5.7 moles of Mg?

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Science Chemistry

04/21/20

What is the empirical formula for a compound consisting of 72.2% magnesium and 27.8% nitrogen by mass?

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Science Chemistry

04/21/20

Question in the description, can you please explain how you got the answer, thank you

What is the empirical formula for the following molecular formulas?1). C6H12O22 ___________________ 2). Fe2O3 ___________________ 3). C2H2 ___________________

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Science

04/21/20

Independent and Dependent Variables

Different rose bushes are grown in a greenhouse for two months. The number of flowers on each bush is counted at the end of an experiment. What is the IV?Different rose bushes are grown in a... more

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Calculate the boiling point elevation of a solution containing 43.8 g of glucose (C6H12O6) dissolved in 359.9 g of water. Calculate the freezing point depression for the same solution.

how many grams of 206Hg will you have after 17.5 years?

What question about the world around you could be answered using the scientific method?

Fill in the genotypes for all 10 individuals on the pedigree attached. Use the letter A. This trait follows normal dominance rules. Aa shows the dominant trait.

How many alpha and beta particles are emitted in the decay series?

Calculate E°(cell) for the reaction

Health fitness and wellness

What is being measured during an experiment or the data

Which of the following is completely true about the relationship between ΔG and T for this reaction?

Rate of reaction question

percentage of potassium iodide in solution

How does Newtons three laws work in a Ferris wheel

In asexual reproduction, offspring are produced ________.

The cell that is formed when fertilization occurs is called a __________.

AP Physics: All objects are placed at the top of a smooth incline and started simultaneously (symmetry axis) . In what order do they cross the finish line- and why?

What mass of iron(III) chloride is produced when 100.0 mL of 0.100 M solution of barium chloride is reacted with 50.00 mL of 0.150 M solution of iron(III) sulfate?What's the limiting, excess reactant?

How many atoms are there in 0.228 moles of water?

How many molecules of nitrogen are there in 7.55 moles of N₂?

What is the percent composition for all the elements in ammonium sulfite? 4). % N ______ 5). % H ______ 6). % S ______ 7). % O ______

Chemistry question on net ionic equations! Not sure how to write it

Push Mower Force (Physics)

In the following reaction; 2 Mg(s) + CO2(s)  2 MgO(s) + C(s), how many grams of MgO can be produced from 5.7 moles of Mg?

What is the empirical formula for a compound consisting of 72.2% magnesium and 27.8% nitrogen by mass?

Question in the description, can you please explain how you got the answer, thank you

Independent and Dependent Variables

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What is the percent composition for all the elements in ammonium sulfite? 4). % N 5). % H 6). % S 7). % O