Answer:
Mass by mass
Explanation:
Because it's telling only about mass in grams
Answer:
4. b 5.C
Explanation:
Photosynthesis makes sugar for plants and sunlight is the energy used to convert CO2 and water into glucose
They are lost from valence shell (it's outermost shell of an atom).
->>> outside the atom
Answer:
LiOH+CH3COOH=C2H3LiO2+H2O balanced equation
Explanation:
lithium hydroxide-> LiOH
hydrogen acetate->CH3COOH
lithium acetate->C2H3LiO2
water->H2O
LiOH+CH3COOH=C2H3LiO2+H2O
Li=1,O=3,H=5,C=2 --> Li=1,O=3,H=5,C=2
the two sides have same numbers so it is balanced.
1) molar mass of the C6H8O<span>6, you need to consult the atomic weight of the C, H and O atoms that are in the periodic table: C is 12; H is 1; O is 16
(12x6)+(1x8)+(16x6)= 176g/mol
</span><span>176 g = 1 mol
0,5 g = x mol 500mg= 0,5 grams
molar mass = mass÷ moles
176 = 0,5÷ x
x= 2,84 x 10⁻³ mol
2) To find the number of molecules present in those </span>2,84 x 10⁻³ mol we need to multiple the moles by the <span>Avogadro's constant
No. of molecules = Avogadro's constant x n° of moles
</span>No. of molecules = 6.022 x 10²³ x 2,84 x 10⁻³ <span>
= 1.71 x 10²¹ molecules of vit C. </span>
