4,347 Answered Questions for the topic Science

Science

04/29/20

Elephants Travel a Mile Loop of yearly migration
Elephants travel a __________ mile loop during their yearly migration.   a 200  b 300  c 400  d 500
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Science Biology

04/29/20

Can someone help me with science homework?
The puppy has the genotype Ll for hair length. What is the puppy’s phenotype for hair length? The puppy has the genotype cc for hair curliness. What is the puppy’s phenotype for hair curliness?... more
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Science Math Chemistry

04/29/20

what is the half-life in seconds?
A → B is a first order reaction. Using the data below, what is the half-life in seconds? 0 sec, [A] = 1.22 M 3 sec, [A] = 0.86 M 6 sec, [A] = 0.61 M 9 sec, [A] = 0.43 M 12 sec, [A] = 0.31 M 15 sec,... more
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04/29/20

Describe how the processes of boiling, sublimation, and efflorescence are similar.
Describe how the processes of boiling, sublimation, and efflorescence are similar.
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04/29/20

Consider the following list of compounds: MgSO4, C2H2, CH4, CaO. Which compounds are most likely to dissolve in water?
Consider the following list of compounds: MgSO4, C2H2, CH4, CaO. Which compounds are most likely to dissolve in water?
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04/29/20

Using data from the figure, graph the density as a function of the temperature for liquid water from 100°C to 4°C.
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04/29/20

Hydrogen fluoride (HF) has a lower boiling point than water (H2O), even though fluoride (F) has a greater electronegativity than oxygen (O). Why do you think that is?
Hydrogen fluoride (HF) has a lower boiling point than water (H2O), even though fluoride (F) has a greater electronegativity than oxygen (O). Why do you think that is?
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04/29/20

Printers often use surfactants in the printing of paper with ink. Explain why this might be.
Printers often use surfactants in the printing of paper with ink. Explain why this might be.
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04/29/20

Why is water (H2O) a liquid at room temperature while carbon dioxide (CO2) is a gas? What’s different about their structures that results in very different properties?
Why is water (H2O) a liquid at room temperature while carbon dioxide (CO2) is a gas? What’s different about their structures that results in very different properties?
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04/29/20

If 1 mole of each of the solutes listed below is dissolved in 1 L of water, which solute will have the greatest effect on the vapor pressure of its respective solution?

Which is the correct answer?A) C6H12O6B) CaSO4C) KBrD) MgCl2
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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.
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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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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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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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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