WILL GIVE BRAINLIEST!!!

A 15.0 mL solution of Sr(OH)2 is neutralized with 38.5 mL of 0.350 M

Darya [45]

Answer:

Molarity of Sr(OH)₂ = 0.47 M

Explanation:

Given data:

Volume of Sr(OH)₂ = 15.0 mL

Volume of HCl = 38.5 mL (0.0385 L)

Molarity of HCl = 0.350 M

Concentration/Molarity of Sr(OH)₂ = ?

Solution:

Chemical equation:

Sr(OH)₂ + 2HCl → SrCl₂ +2H₂O

Number of moles of HCl:

Molarity = number of moles/ volume in L

0.350 M = number of moles/0.0385 L

Number of moles = 0.350 mol/L× 0.0385 L

Number of moles = 0.0135 mol

Now we will compare the moles of HCl with Sr(OH)₂.

HCl : Sr(OH)₂

2 : 1

0.0135 : 1/2×0.0135 = 0.007 mol

Molarity/concentration of Sr(OH)₂:

Molarity = number of moles / volume in L

Molarity = 0.007 mol /0.015 L

Molarity = 0.47 M

7 0

3 years ago

Consider the following data showing the initial rate of a reaction (A→products) at several different concentrations of A.

OlgaM077 [116]

Answer:

(1) order = 2

(2) R = K [A]²

Explanation:

Given the reaction:

A--------->Product

The rate constant relation for the reaction is given as:

R(i) = K [A]............(*)

Where R(I) is rate constant at different concentration of A.

Taking the rate constant as R1, R2 and R3 for the different concentrations respectively. Then the following equations results

0.011 = K [0.15] ⁿ.........(1)

0.044 = K [0.30]ⁿ .......(2)

0.177 = K [0.60]ⁿ .........(3)

Dividing (2) by (1) and (3) by (1)

Gives:

0.044/0.011 = [0.3/0.15]ⁿ

4 = 2ⁿ; 2² = 2ⁿ; n = 2

Similarly

0.177/0.011 = [0.60/0.15]ⁿ

16.09 = 4ⁿ

16.09 = 16 (approximately)

4² = 4ⁿ ; n = 2

Hence the order of the reaction is 2.

The rate law is R = K [A]²

4 0

3 years ago

ANYONE HELP ME IN CHEMISTRY:(<br>JUST THE NAME AND SYMBOL <br>ANYONE WHO CAN HELP ME:(

lana [24]

Answer:

Hydrogen: H, Helium: He, Carbon: C

Nitrogen: N, Oxygen: O, Fluorine: F

Neon: Ne, Sodium: Na, Magnesium: Mg

Aluminum: Al, Silicon: Si, Phosphorus: P

Chlorine: Cl, Selenium: Se, Silver: Ag

Titanium: Ti, Beryllium: Be, Lithium: Li

Uranium: U, Nickel: Ni , Copper: Cu

Bromine: Br, Cadmium: Cd, Zinc: Zn

Cobalt: Co, Gallium: Ga, Germanium: Ge

Iron: Fe, Krypton: Kr, Potassium: K

Calcium: Ca, Chromium: Cr, Manganese: Mn

Scandium: Sc, Tin: Sn, Vanadium: V

Platinum: Pt, Boron: B, Au: Gold

7 0

3 years ago

A backpacker collects snow at 0°C, and places it in a cooking pot on a camp stove. It takes 643 kJ of heat energy to melt the sn

frutty [35]

Answer:

mass (m) of the snow that the backpacker collected= 0.855 kg

Explanation:

Given that:

Q = 643 kJ = 643000 J

ΔHfusion = 6.02 kJ/mol = 6020 J/mol

number of mole of water H2O = $\frac{mass (m)}{18}$

c = 4.18 J/g⋅K

ΔT = 100 K

Since there is a phase change from solid to liquid; then :

$Q =$ $Q_s + Q_l$

ΔH = $\frac{q}{mol}$

However without the given mass; we substitute $\frac{m}{18}$ for the number of moles; so:

Q = $\delta H * \frac{m}{18}$ $+ m*c * \delta T$

$643000 =$ $6020 * \frac{m}{18}+ m * 4.18 * 100$

m = 855 g

m = 0.855 kg

mass (m) of the snow that the backpacker collected= 0.855 kg

8 0

3 years ago

A photographic "stop bath" contains 160ml of pure acetic acid, HC2H302(1) in 650ml solution. what is the v/v concentration of ac

Butoxors [25]

Answer:

discupaeu não sei

um belo dia abençoado

7 0

3 years ago