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  • Waiting for answer Check my work please. Give the nuclear symbol for isotopes o...

    Refer to the explanation. Nuclear notation (nuclear symbol) is a shorthand way to represent the nucleus of an isotope of an element. The nucleus of an atom contains protons and neutr...

  • Waiting for answer Air is cooled from room temperature 25 C to 100 K what is th...

    ##25°C## is ##25+273=298 K## so ##DeltaT=100-298=-198 K## You can also see that ##100 K=100-273=-173 °C## and ##DeltaT=-173-25=-198 °C## The interesting thing is that, the two scales being centigrades, you have ##DeltaT## in ##K=DeltaT## in ##°C##!!!

  • Waiting for answer Assuming an efficiency of 42.40%, calculate the actual yield...

    ##"294.4 g Mg"("NO"_3)_2## Start by writing the balanced chemical equation ##"Mg"_text((s]) + "Cu"("NO"_3)_text(2(aq]) - "Mg"("NO"_3)_text(2(aq]) + "Cu"_text((s])## Notice that...

  • Waiting for answer How do you evaluate the inverse function by sketching a unit...

    The trigonometric functions (##"sin"##, ##"cos"##, ##"tan"##) all take angles as their arguments, and produce ratios. (remember SOHCAHTOA) The inverse trigonometric functions (##"arcsin"##, ##"arccos"##) take ratios as their arguments, and produce the corresponding angles. Let us take a look at a...

  • Waiting for answer The acidic form of bromothymol blue (pKa = 7.0) is yellow, a...

    The answer is (a) yellow, green, blue. Bromothymol blue acts as a weak acid in solution. You can write the equilibrium reaction for the ionization of any acid indicator like this...

  • Waiting for answer A certain length of wire when vibrated with another sonomete...

    242 Hz. Solution : The frequency of the first wire must be ##242## Hz. Explanation : Solving this problem requires knowing the following concepts, Speed of propagation of a wa...

  • Waiting for answer What is an example of an ecological niche?

    Archer Fish spitting at flying insects, using the air above water as a ecological niche. A niche is a small category that's made from splitting up large categories. For example, if...

  • Waiting for answer What happens when you mix baking soda and vinegar? Would it...

    The answer is C. When baking soda and vinegar are mixed together, a chemical reaction occurs. This is a vigorous reaction. Baking soda is called sodium bicarbonate, and has the chemi...

  • Waiting for answer How do you write 75% as a fraction?

    3/4 75% = 75/100 ##(75/25/100/25)= 3/4##

  • Waiting for answer What is neutralization reaction?

    Chemical reaction where reactants are acid (##pH 7##) and base (##pH 7##) Products are salt (of the acid + base), and water. reaction: ## A + B = "salt" + H_2O ## Salts = m...

  • Waiting for answer What is the average human reaction time?

    Most texts seem to suggest that a good reaction time is anywhere between ##0.25## seconds and ##0.35## seconds. Most texts seem to suggest that a good reaction time is anywhere betwe...

  • Waiting for answer What is an example of a metaphor about homeless people that...

    Burnt out flames hoping to find sparks to reignite them again The flame represents people in general and in this case, a burnt flame represents homeless people because they're still...

  • Waiting for answer What does pH measure?

    ##pH## is a quantitative measure of the concentration of hydronium ion, ##H_3O^+## in aqueous solution. Water is known to undergo autoprotolysis according to the following reaction:...

  • Waiting for answer How do you find the de Broglie wavelength of an electron?

    The de Broglie equation is an equation used to describe the wave properties of matter or particles. de Broglie proved that every moving particle has a matter wave associated with it. The wavelength of the wave depends on the mass and the velocity of the particle. λ = h/mv, where λ is wavelength, h i...

  • Waiting for answer What is the difference between an equiangular polygon, an e...

    See explanation. An equiangular polygon is a polygon in which all angles are equal. An equilateral polygon is a polygon with equal sides. If both sides and angles are equal then the...

  • Waiting for answer How do you find the multiplier for the rate of exponential d...

    The very quick answer: Exponential decay problems will give you a decay rate percentage. Multiplier = (100 - percent given)##-:##100. Understand the process explained below before going straight to the formula. Finding the multiplier means first knowing what a multiplier is. Definition: A multip...

  • Waiting for answer What does the "15w40" stand for?

    15W40 means that at cold temperatures the oil has the same viscosity as SAE 15W oil. At high temperatures it has the same viscosity as SAE 40 oil The Society of Automotive Engineers...

  • Waiting for answer A plane flying horizontally at an altitude of 1 mi and speed...

    When the plane is 2mi away from the radar station, its distance's increase rate is approximately 433mi/h. The following image represents our problem: P is the plane's position R is...

  • Waiting for answer What are some organelles plant cells have that animal cells...

    Plant cells have chloroplasts and a cellulose cell wall which are not found in animal cells.

  • Waiting for answer How would you make "fish" plural possessive?

    The possessive plural of fish is either fish's or fishes'. Fish is a noun which has two plurals. "I caught five fish". "The fishes in the river include trout and salmon". Whether the...

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