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Questions in Grade College

📝 Answered - Which expression can be used to find the difference of the polynomials? $(4 m-5)-(6 m-7+2 n)$ $(4 m-5)+(6 m+7+2 n)$ $(4 m-5)+(-6 m+7+2 n)$ $(4 m-5)+(-6 m-7-2 n)$ $(4 m-5)+(-6 m+7-2 n)$

📝 Answered - What is the molar mass of aspirin, [tex]$C _9 H _8 O _4$[/tex]?

📝 Answered - solve this please please please plase

📝 Answered - The bottom part of the shell of a tortoise is called a(n) A. plastron B. nephron C. septum D. teleost

📝 Answered - Which equation is a function of $x$? $x=5$ $x-y^2+9$ $x^2=y$ $x^2-y^2+16$

📝 Answered - Which expression gives the factorization of $x^3-27 y^3$ ? A. $(x-3 y)(x^2+3 x y+9 y^2)$ B. $(x-3 y)(x^2-3 x y+3 y^2)$ C. $(x-3 y)(x^2+3 x y+3 y^2)$ D. $(x-3 y)(x^2-3 x y+9 y^2)$

📝 Answered - John pushes his brother Danny on a skateboard. John applies a force of 2 N and Danny's acceleration is [tex]$0.9 m / s ^2$[/tex]. What is the combined mass of Danny and his skateboard? A. 31 kg B. 48 kg C. 43 kg D. 35 kg

📝 Answered - If the following fractions were converted to decimals, which one would result in a repeating decimal? A) $5 / 11$ B) $1 / 9$ C) $3 / 7$ D) $3 / 4$

📝 Answered - Which equation shows how to calculate how many grams $(g)$ of KCl would be produced from 4 mol KOH? The balanced reaction is: $MgCl_2+2 KOH \rightarrow Mg(OH)_2+2 KCl$ A. $\frac{4 mol KOH }{1} \times \frac{1 mol KCl }{2 mol KOH } \times \frac{74.55 g KCl }{1 mol KCl }$ B. $\frac{4 mol KOH }{1} \times \frac{2 mol KCl }{1 mol KOH } \times \frac{74.55 g KCl }{1 mol KCl }$ C. $\frac{4 mol KOH }{1} \times \frac{2 mol KCl }{2 mol KOH } \times \frac{74.55 g KCl }{1 mol KCl }$ D. $\frac{4 mol KOH }{1} \times \frac{1 mol KOH }{1 mol KCl } \times \frac{74.55 g KCl }{1 mol KCl }$

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?