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  • Waiting for answer How can I find the percent compositions of Mg(NO3)2?

    To find we need to begin by finding the gram formula mass of the ##Mg(NO_3)_2## compound. Mg 1 atom x 24.31 = 24.31 N 2 atoms x 14.01 = 28.02 O 6 atoms x 15.99 = 95.94 Total Mass = 148.27 g/mol % Magnesium = ##(24.31/148.27)##= .164 or 16.4 % % Nitrogen = ##(28.02/148.27)## = .189 or...

  • Waiting for answer Calculate the %Br in a 1.0234g mixture of AgCl and AgBr if t...

    ##"% Br" = 24.91%## The trick here is to realize that the number of moles of chloride anions, ##"Cl"^(-)##, and bromide anions, ##"Br"^(-)##, will be equal to the number of moles o...

  • Waiting for answer When iron(II) sulfate dissolves in water, does iron(II) form...

    Yes. All iron sulfate complex with water until all the binding sites are filled up. In this case, you get an octahedral complex that can be written as ##[Fe(H_2O)_6]SO_4##, or drawn as: where the oxygens on the waters point towards the iron. A common name for it is Ferrohexahydrite. The scie...

  • Waiting for answer When is Lac operon turned on and When is it turned off?

    It depends on presence of lactose and Glucose in bacterial environment. The operon is turned on when available food source of bacteria is only lactose. Introduction : this operons...

  • Waiting for answer How do you find the related acute angle?

    The related acute is an acute angle (## 90^@##) that can be found between the terminal arm and the x-axis when the terminal arm is in quadrants 2, 3, or 4 . There is no related acute angle if the terminal arm lies in quadrant 1 . Here are some examples: If the terminal arm is in quadrant 2, do #...

  • Waiting for answer Do plant cells contain mitochondria?

    Plant cells DO contain mitochondria. While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the...

  • Waiting for answer Which of these is not an example of an isotonic muscle contr...

    Pushing against a wall. There are two types of muscle contractions : Isometric and Isotonic. Here we can see pushing against a wall is not an example of isotonic contraction. Rath...

  • Waiting for answer What is a constellation is and what determines when it is vi...

    Constellation is an area in the sky approved by international astronomical union. IAU divided the sky into 88 constellations.Ancient people grouped stars with imaginary figures calle...

  • Waiting for answer The ordered pair (1.5, 6) is a solution of direct variation...

    If ##(x,y)## represents a solution then ##y = m*x## for some constant ##m## Given the pair ##(1.5,6)## we have ##6 = m*(1.5)## ##rarr m=4## and the direct variation equation is ##y= 4x## If ##(x,y)## represents an inverse variation solution then ##y = m/x## for some constant ##m## Given the pa...

  • Waiting for answer How does salt change the specific heat capacity of water?

    Increasing the concentration of the salt decreases the capacity of the water. When we heat a sample of water, the energy goes into raising the energy levels of its various vibratio...

  • Waiting for answer How do you convert 849 yards to mile?

    ##849" yards" ~~0.482" miles"## to 3 decimal places ##color(blue)("Using ratio")## ##("miles")/("yards") - 1/1760-=("miles")/849## ##" "color(red)(uarr)## #...

  • Waiting for answer Hybridization of carbon in ##C_2H_2##?

    The carbon atoms are ##sp## hybridized in the acetylene molecule. Start by taking a look at the of acetylene, ##"C"_2"H"_2##. The molecule has a total of 10 , 4 from each of the...

  • Waiting for answer What are the two main types of chemical bonds?

    Ionic and Covalent is when one atom gains an electron from the other atom and both become ions (hence: Ionic bonding). the atom that loses the electron becomes positively charged an...

  • Waiting for answer You have 47 mL of a 0.500 M stock solution that must be dilu...

    188mL water must be added To solve you need to use the equation: ##M_1V_1## = ##M_2V_2## Solve for ##V_2## ##V_2## = ##M_1V_1##/##M_2## Now substitute in your known values ##V_2##...

  • Waiting for answer A regular polygon has interior angles of 168°. How many side...

    ##360 div 12° = 30## sides The only number that stays the same for the angles of all polygons is that the sum of the exterior angles is 360°. If you know the size of an exterior ang...

  • Waiting for answer Why do Uranus and Neptune appear to be blue?

    Methane gas in their atmosphere make them appear blue! The answer to Neptune’s color comes from its cloud tops. The upper atmosphere of Neptune is made up of ##80%## hydrogen, ##19%...

  • Waiting for answer A pail with 40 washers in it weighs 500 grams. The same pail...

    The pail weighs 340 grams The difference between the two pails is 20 washers meaning that the loss of 80 grams is equivalent to the difference, so if 20 washers is equal to 80 grams...

  • Waiting for answer What channels in the presynaptic neuron open up in response...

    Voltage-gated calcium ion channels The major one is voltage-gated calcium ion channels, as the influx of calcium is what subsequently triggers vesicles containing neurotransmitter to...

  • Waiting for answer How to write an equation relating distance to force? With a...

    We have discussed case of constant force and variable force separately. We know from of motion that ##vecF=massxxveca## Also that kinematic equation connecting constant ##a## and...

  • Waiting for answer What is the difference between simple present and present te...

    see below Simple and present tense are sometimes used interchangeably. However, simple present is more specific. It is one of the tenses in the present tense. The other tenses...

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