• Whats 4 times 2?

    4 x 2 = 8 In 'dot' form . . . . . . . . . There are two rows each of four dots. That makes a total of eight.
    4 x 2 = 8 In 'dot' form . . . . . . . . . There are two rows each of four dots. That makes a total of eight.
    14 answers · Mathematics · 5 hours ago
  • Which of the following compounds is the most soluble in water?

    Best answer: B Propanoic Acid
    Best answer: B Propanoic Acid
    2 answers · Chemistry · 6 hours ago
  • W^44 + w^45 = ? Options : A)-1 B)-1/w C) 1/(-w^2) or none. I know that w^3 = 1 the answer is c...how?

    w^44 = 1 w^45 = sqrt(-1) If w = sqrt(-1) Then w^2 = -1 w^3 = -sqrt(-1) w^4 = (+)1 Hence any multiple of '4' in the index is equal to '1' w^44 + w^45 = 1 + sqrt(-1) w^44(1 + w) = 1 + sqrt(-1)
    w^44 = 1 w^45 = sqrt(-1) If w = sqrt(-1) Then w^2 = -1 w^3 = -sqrt(-1) w^4 = (+)1 Hence any multiple of '4' in the index is equal to '1' w^44 + w^45 = 1 + sqrt(-1) w^44(1 + w) = 1 + sqrt(-1)
    4 answers · Mathematics · 1 day ago
  • How many liters at STP will 453.6 grams of SO2 produce?

    First calculate the moles of SO2 mol(SO2) = 453.6 / (32 + 16 + 16) = 7.0875 moles. Next remember at STP 1 mole of a gas is contained in 24 litres. Hence 7.0875 x 24 = 170.1 litres.
    First calculate the moles of SO2 mol(SO2) = 453.6 / (32 + 16 + 16) = 7.0875 moles. Next remember at STP 1 mole of a gas is contained in 24 litres. Hence 7.0875 x 24 = 170.1 litres.
    3 answers · Chemistry · 1 day ago
  • What is the nuclear decay equation for Carbon-14? #Chemistry?

    [14/6]C = [14/7]N + beta decay(b-) beta decay is an electron emitted from the nucleus. A neutron disintegrates to form a proton and an electron [1]n = [1]p + e^- Hence the six protons (Carbon)have changed to 7 protons (Nitrogen). The mass remains the same as 1 neutron = 1 proton (by mass). The half life of the decay process is 5570 years. show more
    [14/6]C = [14/7]N + beta decay(b-) beta decay is an electron emitted from the nucleus. A neutron disintegrates to form a proton and an electron [1]n = [1]p + e^- Hence the six protons (Carbon)have changed to 7 protons (Nitrogen). The mass remains the same as 1 neutron = 1 proton (by mass). The half life of the decay process is 5570 years.
    3 answers · Chemistry · 1 day ago
  • 250,000 divided by 10?

    250,000 / 10 = 25,000
    250,000 / 10 = 25,000
    18 answers · Mathematics · 1 day ago
  • Can someone please help me with calculus review? Find the derivatives of the following functions:?

    8 y = x^3 + 2x + x^(2x) dy/dx = 3x^2 + 2 + (2x)(x^(2x - 1) ( 2) => dy/dx = 3x^2 + 2 + 4x(x^(2x - 1)
    8 y = x^3 + 2x + x^(2x) dy/dx = 3x^2 + 2 + (2x)(x^(2x - 1) ( 2) => dy/dx = 3x^2 + 2 + 4x(x^(2x - 1)
    2 answers · Mathematics · 2 days ago
  • When a metal becomes an ion it: ?

    When a metal becomes an CATion it LOSES and electron . e.g. Na(g) = Na^+(g) + e^- Sodium metal has 11 protons , 11 electrons and 12 neutrons. When it becomes the sodium cation it has 11 protons , 10 electrons and 12 neutrons. Notice the loss of one electron from 11 to 10 It is given the symbol 'Na^+' because it has 11 protons(+)... show more
    When a metal becomes an CATion it LOSES and electron . e.g. Na(g) = Na^+(g) + e^- Sodium metal has 11 protons , 11 electrons and 12 neutrons. When it becomes the sodium cation it has 11 protons , 10 electrons and 12 neutrons. Notice the loss of one electron from 11 to 10 It is given the symbol 'Na^+' because it has 11 protons(+) compared to 10 electrons(-) +11 - 10 = +1 Hence the symbol Na^+ Similarly for Calcium , except it loses 2(TWO) electrons to become Ca^2+
    4 answers · Chemistry · 2 days ago
  • Working with Boyle s Law and a bit confused. How do I solve for P2 with these two questions.?

    Use the equation P(1)V(1)/T(1) = P(2)V(2)/T(2) Since the temperature is constant we can discount T(1) & T(2) Hence P(1)V(1) = P(2)V(2) Algebraically rearrange P(2) = (P1)V(1)/V(2) Substitute in P(2) = 413.2 mmHg x 326.1 mL / 61.4 mL P(2) = 2194.536 mmHg
    Use the equation P(1)V(1)/T(1) = P(2)V(2)/T(2) Since the temperature is constant we can discount T(1) & T(2) Hence P(1)V(1) = P(2)V(2) Algebraically rearrange P(2) = (P1)V(1)/V(2) Substitute in P(2) = 413.2 mmHg x 326.1 mL / 61.4 mL P(2) = 2194.536 mmHg
    5 answers · Chemistry · 2 days ago
  • DETERMINE THE NUMBER OF MOLES of NaOH present in average volume of 15.93v mL OF NaOH SOLUTION used in titration?

    What is the concentration of NaOH Without knowing the 'conc' , then the moles cannot be calculated. NB moles = [conc] x vol(mL) / 1000
    What is the concentration of NaOH Without knowing the 'conc' , then the moles cannot be calculated. NB moles = [conc] x vol(mL) / 1000
    2 answers · Chemistry · 2 days ago
  • What mass of ethanol can be made from 53g of ethene, given that water is in excess? C2H4+H2O-->CH3CH2OH What is the answer? I got 90.86.?

    From the reaction eq'n. which is BALANCED, the molar ratios are 1:1::1 Hence mol(Ethene) = 53/(28) = 1.8928 moles ( equibalent to '1') mol(Ethanol_ = 1.8928 moles ( Also equivalent to '1') Mass(ethanol) = 1.8928 X 46 = 87.07 g NB Mr(Ethene) = 28 Mr(Ethanol) = 46
    From the reaction eq'n. which is BALANCED, the molar ratios are 1:1::1 Hence mol(Ethene) = 53/(28) = 1.8928 moles ( equibalent to '1') mol(Ethanol_ = 1.8928 moles ( Also equivalent to '1') Mass(ethanol) = 1.8928 X 46 = 87.07 g NB Mr(Ethene) = 28 Mr(Ethanol) = 46
    3 answers · Chemistry · 2 days ago
  • Is ding dong a nice nick name for a baby?

    Think about , when he gets to 80 years old. 'Uncle Ding Dong' NO!!!!!
    Think about , when he gets to 80 years old. 'Uncle Ding Dong' NO!!!!!
    10 answers · Jokes & Riddles · 2 days ago
  • Chemistry problem?

    HCl & NaCl are NOT the same chemical (thing). NaCl is an ionically bonded compound. Sodium(Na) ionises (loses) one electron to form Na^+ ion. Chlorine has an electron affinity and accepts one electron to complete its outer octet. and form the chloride (Cl^-) ion. Since Na^+ is positive and Cl^- is negative , they come together by electrostatic... show more
    HCl & NaCl are NOT the same chemical (thing). NaCl is an ionically bonded compound. Sodium(Na) ionises (loses) one electron to form Na^+ ion. Chlorine has an electron affinity and accepts one electron to complete its outer octet. and form the chloride (Cl^-) ion. Since Na^+ is positive and Cl^- is negative , they come together by electrostatic attraction ; like the N & S poles of a magnet. Sodium Chloride; NaCl is a chemical salt and is neutral in water. It also dissolves in water. It is the 'salt' used in foodstuffs. NaCl is a white crystalline solid at room temperature. pH(NaCl) = 7 HCl is a covalently bonded compound. The H shares its electron with chlorine and chlorine in turn shares one of its outmost electrons with hydrogen. Hence they are combined by sharing electrons HCl is an acidic gas at room temperature. A quick sniff of the gas is very acrid/acidic. It readily dissolves in water to form hydrochloric acid . It is one of the digestive acids in the human stomach . When one has indigestion/acidosis/vomiting , that horrible burning sensation is the hydrochloric acid from the stomach. pH(HCl) = 1
    2 answers · Chemistry · 2 days ago
  • Is manny a nick name for Emanuel?

    YES!!! It is used in the Jewish community.
    YES!!! It is used in the Jewish community.
    21 answers · Baby Names · 2 days ago
  • HELP WITH TRIG HW: Half angle formulas?

    67.5 = 90 - 22.5 = pi/2 - pi/8 Hence Sin(67.5) = Sin(90 - 22.5) = Sin(pi/2 - pi/8) Using the Trig identity Sin(pi/2)Cos(pi/8) - Cos(pi/2)(Sin(pi/8) => Cos(pi/8) - 0 Cos(pi/8) = Cos( 3.141592... / 8) =cos(0/3926999...) = 0.9238....
    67.5 = 90 - 22.5 = pi/2 - pi/8 Hence Sin(67.5) = Sin(90 - 22.5) = Sin(pi/2 - pi/8) Using the Trig identity Sin(pi/2)Cos(pi/8) - Cos(pi/2)(Sin(pi/8) => Cos(pi/8) - 0 Cos(pi/8) = Cos( 3.141592... / 8) =cos(0/3926999...) = 0.9238....
    3 answers · Mathematics · 2 days ago
  • How many grams of oxygen react with 12g of magnesium ? , pls including the stages in detail?

    2Mg(s) + O2(g) = 2MgO(s) Molar ratios are 2:1::2 moles(Mg) = 12g / 24 = 0.5 moles (equivalent to '2') moles(O2) = 0.5/2 = 0.25 moles(equivalent to '1') Mass(O2) = 0.25 moles x 32 = 8g
    2Mg(s) + O2(g) = 2MgO(s) Molar ratios are 2:1::2 moles(Mg) = 12g / 24 = 0.5 moles (equivalent to '2') moles(O2) = 0.5/2 = 0.25 moles(equivalent to '1') Mass(O2) = 0.25 moles x 32 = 8g
    2 answers · Chemistry · 2 days ago
  • What is the nuclear decay equation for hydrogen-3?

    [3/1]H = [3/2]He + (beta decay) (b^-) NB 'Beta Decay' is an electron emitted from the nucleus NNB Half life of [3/1]H is 12.3 years NNNB One of the three neutrons in [3/1]H disintegrates to form one proton and emits 1 electron (b^-1 decay) Hence the mass remains the same but we now have two protons. Because one of those particles of mass... show more
    [3/1]H = [3/2]He + (beta decay) (b^-) NB 'Beta Decay' is an electron emitted from the nucleus NNB Half life of [3/1]H is 12.3 years NNNB One of the three neutrons in [3/1]H disintegrates to form one proton and emits 1 electron (b^-1 decay) Hence the mass remains the same but we now have two protons. Because one of those particles of mass has converted to a neutron to a proton. Hope that helps!!!!
    3 answers · Chemistry · 2 days ago
  • What's a popular boy and girl name you hate?

    Girl : Scarlet, Jade, & Britany.
    Girl : Scarlet, Jade, & Britany.
    23 answers · Baby Names · 3 days ago
  • Whatssup? THIS ONE. Solve it chemistry experts?

    This is an esterification reaction between propan-1-ol (Alcohol) and ethanoic acid . The con. sulphuric acid and heat are used to speed up the reaction. CH3COOH + CH3CH2CH2OH <== (H^+/heat)==> CH3C(=O)OCH2CH2CH3 + H2O Hence 'y' is ethanoic acid The ester is an 'oily' substance and does not hydrogen bond to waater nor acid. show more
    This is an esterification reaction between propan-1-ol (Alcohol) and ethanoic acid . The con. sulphuric acid and heat are used to speed up the reaction. CH3COOH + CH3CH2CH2OH <== (H^+/heat)==> CH3C(=O)OCH2CH2CH3 + H2O Hence 'y' is ethanoic acid The ester is an 'oily' substance and does not hydrogen bond to waater nor acid.
    1 answer · Chemistry · 3 days ago