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  • Waiting for answer How do you solve rational equations ##[(x+2) / (x-1)] = [1/2...

    ##x=-5## When we have a fraction equal to another fraction we can use the method of ##color(blue)"cross-multiplication"## to solve. That is ##(color(red)(x+2))/(color(blue)(x-1))=c...

  • Waiting for answer How would you find the molar enthalpy of vaporization for a...

    ##"8.85 kJ/mol"## The molar of vaporization is simply the enthalpy change needed in order for one mole of a given substance to undergo a liquid ##- ## vapor . Now, the molar ent...

  • Waiting for answer Who was president during the Iran-Contra scandal?

    Ronald Reagan. The Iran-Contra affair (or scandal) was thrust into public view during President Ronald Reagan's second term in office. It all started as a plan to free American ho...

  • Waiting for answer How do you balance this equation H2SO4+NH4OH--->(NH4)2SO...

    The balanced equation is: ##H_2SO_(4(aq))+2NH_4OH_((aq))rarr(NH_4)_2SO_4(aq)+2H_2O_((l))## Sulfuric acid is diprotic so is able to give up 2 H+ ions. ##NH_4OH## is not a compound that can actually exist as a discrete substance. It is better described as ammonia solution which is formed from dissol...

  • Waiting for answer What are good adjectives that start with the letter "J"?

    Just, jealous, jaded.

  • Waiting for answer What is metallic bonding, how does it work, and is it strong...

    I'll try my best. Photo from: https://mypchem.wikispaces.com Metals love to share electrons. In metals, the electrons are feebly bound to the nucleus, so when metals come into cont...

  • Waiting for answer How do you find the circumference of a circle with diameter...

    ##7.2 pi## cm The formula for the circumference of a circle is: ##Circumference = 2 xx pi xx Radius## or ##Circumference = pi xx Diameter## You're given the diameter, so we can u...

  • Waiting for answer How many obtuse angles in a regular pentagon?

    5 To find the number of obtuse angles in a regular pentagon, we first need to find the sum of the interior angles in a pentagon. We can calculate the sum by using the formula: ##18...

  • Waiting for answer Alexander the Great's empire extended to which river in the...

    The Indus, the longest river of Pakistan, more than 3,000 km. It flows from Tibet to the Arabian Sea near Karachi. An empire is an ill-defined institution. It generally implies that...

  • Waiting for answer Are Glycosidic bonds, Peptide Bonds and Ester Bonds condensa...

    Yes, they are all formed by condensation reactions, also known as dehydration syntheses, in which the removal of a water molecule between the biomolecules allows for the formation of a bond between the biomolecules....

  • Waiting for answer What is the molar mass of glucose (C6H12O6)???

    Find atomic mass of each atom. To find the molar mass of glucose first find the atomic mass of each atom. Carbon has an atomic mass of 12.01, Hydrogen has an atomic mass of 1.008, and Oxygen has an atomic mass of 16.00. Multiply atomic mass by its subscript. Next you multiply each atomic mass...

  • Waiting for answer What element in the fourth period of the periodic table has...

    The elements of group 15. The of group 15 (column) VA of all have electron configurations of ##s^2 p^3##, giving them five . These elements include Nitrogen (N), Phosphorus (P), A...

  • Waiting for answer How do you find volume when given mass?

    These properties are not related. ##"Density, "rho="Mass"/"Volume"##. If the ##"mass"## is known, ##"volume"## is inaccesible without ##"density"##.

  • Waiting for answer Derive the formula for centripetal acceleration?

    Try this one, I always found it easier than others. Consider: and: hope it helps!

  • Waiting for answer A cone has a slant height of 34 cm and the radius is 16 cm....

    ##2560pi## cubic units. If the cone has a slant height of ##color(orange)(s=34)## and a radius of ##color(red)(r=16)## then its height is (using the Pythagorean Theorem) ##color(whit...

  • Waiting for answer What is a quadrilateral that is not a parallelogram and not...

    There are quite a few answers, here courtesy of Wikipedia. Kite: two pairs of adjacent sides are of equal length. This implies that one diagonal divides the kite into congruent trian...

  • Waiting for answer Why are valence electrons important in chemical bonding?

    The number of valence electrons an atom has will determine the what type and how many chemical bonds the atom will form. Understanding is key to understanding chemical . Delocalize...

  • Waiting for answer How are sedimentary rocks formed and what are some examples?

    are formed when layers and layers of sediments are piled on top of each other over time. Here's a great link describing sedimentary rocks and the different kinds: http://geology.com...

  • Waiting for answer What are viruses?

    DNA or RNA contained within a protein shell. are set up so that they can inject DNA or RNA into a living cell to hijack the cells production chain. The protein shell around the DNA...

  • Waiting for answer What is the oxidation number of ##C_2O_4^(2-)##?

    The oxidation states of the ##C_2O_4^-2## ion are ##C^(+3)## and ##O^-2##. ##C_2O_4## oxalate is a polyatomic ion with a charge of -2. The oxygen atoms in this molecule have a oxida...

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