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安裝中文字典英文字典辭典工具!
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- What is the mass of 211mL of a liquid that has a density of . . . - Socratic
Approx 190*g By definition, rho, is given by the quotient rho_"density"="mass" "volume", and thus has units of g*mL^-1-=g*cm^-3 And so we simply rearrange
- Question #021e1 - Socratic
36 neutrons One way we have of differentiating between various nuclides of the same element is by writing the name of the element followed by a hyphen and the mass number of the nuclide In your case, you would have zinc-66, a nuclide of zinc that has a mass number equal to 66 Now, an atom's mass number, A, tells you the number of protons, which is given by the atomic number, Z, and neutrons
- Question #c7924 - Socratic
Explanation: Given point #-> (x,y)-> (-3,10)# Given gradient #" " (m) =-2# Thus #y=mx+c" "# becomes #" " y=-2x+c# '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #color (blue
- Question #bcbe2 - Socratic
The molarity of this solution is 0 25 mol L The molar mass of sucrose C_12H_22O_11 is 342 grams: (12 xx 12 + 22 xx 1+11 xx 16)=342 If we divide the given mass (85 5 g) by this molar mass, we get the number of moles of sucrose used: 85 5g (342 (g "mol")) = 0 25 mol Now, to determine the concentration, we divide the number of moles of solute by the final volume of the solution Since the
- Question #24dfc - Socratic
29 5^(2 3) Okay Fractional exponents are another way of writing a number that is under a radical and raised to a power 29 5^(2 3) is the same as the cube root of 29 5 squared: root(3)(29 5)^2 With a fractional exponent, the denominator of the fraction is the root, and the numerator is the power x^(1 2) is the same as sqrt(x); root(3)x is the same as x^(1 3) In some expressions or
- Question #e4597 - Socratic
See below First, we need a balanced reaction for the combustion of Butane: C_4H_8 + 6O_2 -> 4H_2O + 4CO_2 Then, we can apply this formula for the change in enthalpy: DeltaH = (sumDelta_fH_ "products" * "moles") - (sum Delta_fH_"reactants" * "moles") Since we already know the heat of combustion, we can plug that value in for DeltaH and we were given the heats of formation of the products Also
- Can someone verify my answer? - Socratic
Try significant digits You answer is correct But the significant figures of your answer might not Double check the way the numbers are written down in the original question Is 2m written as 2 0m, 20 Hz written as 20 Hz etc If so, they are numbers of two significant figures When you have numbers that have mixed significant numbers Then your answer keeps the least significant figure So
- Question #8a78e - Socratic
Lustrous Malleable Ductile Good conductors of heat and electricity These are four primary characteristics of metals, but there are many others as well Metals tend to exhibit luster; that is, they appear to "shine" due to how light interacts with their surfaces Metals tend to exhibit malleability, which means they can be deformed under compressive stress; i e they can be compressed into thin
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