blasting

can you check my answers in the parenthesis 1)The molecular structure around the oxygen in water is (bent) 2)The molecular structure around all the carbons in ethanol is (tetrahedral)

15 years ago

1)The element nickel has ccp packing with a face-centered cubic unit cell. The density of nickel is 8900 kg/m3 and the cell volume is 4.376 x 10-23 cm3. Calculate the value of Avogadro's number to three significant figures based on these data. (Note: the...

15 years ago

Balance the equation: SO2 + NO2 → SO3 + NO im confused, isnt this already balanced since both sides have equal number of atoms

15 years ago

what is the type of packing for body centered unit cell? i put A-B-A-B but my answer is wrong

15 years ago

for face centered unit cell, r=6 find edge in terms of r, face diagonal in terms of r, body diagonal in terms of r, edge=squareroot(8)r face=4r but i don't know how to find body diagonal

15 years ago

Complete and balance the chemical equation using compound formulas. Include the states. If there is no reaction, enter NR. Pb(NO3)2(aq) + NaI(aq) → sine Pb is not reactive, the reaction is NR. Am i correct?

15 years ago

if i mix 15ml of ethanol and 5ml of water into 20ml vol flask. Mass of flask with solution is 50g and mass of empty flask is 40g. How do i calculate the density of ethanol and density of water separately

15 years ago

how do i calculate the volume of a unit cell and volume of atoms within a unit cell for FCC and BCC

15 years ago

Which of the following is the formation reaction for CaO(s) ? can you check my answer(the one that has star next to it) A. Ca(s) + 1/2O2(g)= CaO(s). B. CaO(s)= Ca(s) + 1/2O2(g) C. Ca2+(aq) + O2–(aq)= CaO(s) D. 2 Ca(s) + O2(g)= 2CaO(s) (*) E. 2 CaO(s)= 2 C...

15 years ago

When 0.949 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 389C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. what is molar heat of reaction, Hrxn, f...

15 years ago

is electric field always positive?

15 years ago

does flux depends on electric field or just the enclosed charges only

15 years ago

can we only have uniform electric field in flux only

15 years ago

does current flows from high potential to low potential since it flows from positive terminal to negative terminal

15 years ago

so if a capacitor is connected in series with a resistance. Then if one side of capacitor is connected to a positive terminal. Then does that mean that plate has to be positive charge. The electrons travel from the positive plate around the loop to the ne...

15 years ago

a large thin conducting plate has a net charge q. the charge density on each side of conducting plate is : q/2A electric field on each side is :q/2epsilon=q/4Aepsilon Does the charge on the right surface contribute to the electric field to the left of the...

15 years ago

if i increase the distance between the parallel conducting plates, potential difference going to increase but what about electric field?

15 years ago

if each parallel conducting plates have area 1, then another area 2 is added to each plates, is the charge density and charge still be the same

15 years ago

its a fill in the blanks

15 years ago

sorry for double posting, i forgot to include number 2

15 years ago

is it always 4 atoms in a unit cell

15 years ago

the question is to find the molar heat of reaction of Ca(s) + 2H+(aq)= Ca2+(aq) + H2(g) (i don't know how to do the arrow so im just gonna use the = sign)

15 years ago

if i look at this formula Q=CV=epsilon(A1+A2)V/d, then shouldnt charge increases then charge density also increases

15 years ago