What is the relationship or trend between the distance between the paper clips and the speed your fingers are moving?

A mixture of BaCl2 and NaCl is analyzed by precipitating all the barium as BaSO4. After addition of an excess of Na2SO4 to a 3.9

rjkz [21]

Answer:

The mass % of BaCl2 is 47.24 %

Explanation:

Step 1: Data given

Molar mass BaSO4 = 233.38 g/mol

Molar mass BaCl2 = 208.23 g/mol

Step 2: The balanced equation

BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)

Step 3: Calculate moles BaSO4

Moles BaSO4 = mass BaSO4 / molar mass BaSO4

Moles BaSO4 = 2.113 grams / 233.38 g/mol

Moles BaSO4 = 0.00905 moles

Step 4: Calculate moles BaCl2

For 1 mol BaCl2 we need 1 mol Na2SO4 to produce 1 mol BaSO4 and 2 moles NaCl

For 0.00905 moles BaSO4 we need 0.00905 moles BaCl2

Step 5: Calculate mass BaCl2

Mass BaCl2 = moles BaCl2 * molar mass BaCl2

Mass BaCl2 = 0.00905 moles *208.23 g/mol

Mass BaCl2 = 1.884 grams

Step 6: Calculate % BaCl2

% BaCl2 = (1.884 / 3.988 ) * 100%

% BaCl2 = 47.24 %

The mass % of BaCl2 is 47.24 %

7 0

3 years ago

Convert 100.6 Kelvin to degrees C. °C = K - 273 [?] °C

kirill [66]

Answer:

t (ºC) = T(K) -273

Explanation:

t (ºC) = 100.6 -273

t (ºC) = - 172,4

3 0

1 year ago

Read 2 more answers

30.00 ml of a h2so4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 44.45 ml of a 0.1489

kodGreya [7K]

The concentration of the H2SO4 solution should be 0.1101 M.

Calculation of the concentration:

Since

Volume of H2SO4 = 30.00 mL = 0.030 L

Volume of NaOH= 44.45 mL = 0.04445 L

Concentration of NaOH= 0.1489 M

Now

The balanced equation is

H2SO4 + 2NaOH → Na2SO4 + 2H2O

Now the concentration of the H2SO4 solution is

b*Ca*Va = a*Cb*Vb

here, b = the coefficient of NaOH = 2

Ca = ?

Va = the volume of H2SO4= 30.0 mL = 0.030 L

a = the coefficient of H2SO4 = 1

Cb = the concentration of NaOH = 0.1489 M

Vb = the volume of NaOH = 44.45 mL = 0.04445 L

Now

2*Ca*0.030 = 1* 0.1489* 0.04445

0.060 * Ca = 0.00661

Ca = 0.1101 M

Hence, The concentration of the H2SO4 solution is 0.1101 M.

Learn more about concentration here:

brainly.com/question/14106631

#SPJ4

7 0

1 year ago

Which laws can be combined to form the ideal gas law? Boyle’s law and Charles’s law Gay-Lussac’s law and Avogadro’s law Charles’

kolezko [41]

Ideal gas law is a combination of three gas laws, which are Boyle's law, Charles' law and Avogadro's law. Ideal gas law states that PV = nRT, where:
P = pressure of the gas
V = volume of the gas
n = no of moles of the gas
R = universal gas constant
T = absolute temperature in Kelvin

7 0

3 years ago

Read 2 more answers

Explain how surface waves work.

mote1985 [20]

Surface waves get pulled in by the tired after the moon has come out the moon has a gravitational pool towards the waves

8 0

3 years ago