Chemistry
In respect to covalent bonding, what does it mean if there's an unshared or lone pair of electrons?
Science
A circular hatch in the hull of a submarine has a radius of 40.0 cm. The submarine is 850.0 m under water. If atmospheric pressure above the ocean is 1.01 x 105 Pa and the air pressure inside the submarine is 1.31x 105 Pa, what net force is exerted on the hatch? (ρsw = 10...
chemistry
A gaseous mixture containing 5 moles of H2 and 7 moles of Br2 reacts to form HBr. Write a balanced chemical equation. Which reactant is limiting? What is the theoretical yield in moles? What is the theoretical yield for this reaction in grams? How many moles of excess reactant...
calculus
i'm not sure how to do this. can someone help, please? thanks! consider the function f(x0 = x^2 + 2x on the interval [-2, 2] a. draw a sketch of the graph of f(x). find the average rate of change on the interval [-2, 2] and sketch this secant line. b. find an expression th...
English
essay "peace and stability in a globalized world" I need some help. Thanks
Math
Typing error fing meaning find
Math
How do I fing volume of a shape?
calculus
let f(t) = 2*pi*t + sin(2*pi*t) a) find value of t in open interval (0,2) for which the tangent line at (t, f(t)) is parallel to the line through (0,0( and (2, 4pi) b) suppose the given funtion describes the position of a particle on the x-axis for 0<= t <= 2. What is th...
calculus
find the centroid of the plane region bounded by the curves y = cos x, y=sinx, x=0,
English
I need to know what just means in the following Sentance . Do you think this is just Please help even my mom is blank Tx
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