All categories

2 years ago

NEED HELP!!! PLEASE, AND THANK YOU!!! ^^ <3

Chemistry

2 answers:

Aneli [31]2 years ago

7 0

Answer:

Explanation:

Mrrafil [7]2 years ago

4 0

I think the answer is C

You might be interested in

A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 x 10^20 molecules

blsea [12.9K]

Answer:

Explanation:

100 minutes is 5 half lives ( 100 min/20 min/half life)

= (1/2 )^5

1 x 10^20 * (1/2)^5 = 3.125 x10^18 molecules

7 0

1 year ago

What size volumetric flask would you use to create a 0.50 M<br> solution using 10.00 g of CaBr2

SIZIF [17.4K]

Answer:

Explanation:

First convert the grams of Calcium Bromide to moles by using the atomic weight. Then use the formula for molarity, which is moles per liter.

CaBr2 = 199.9 g/mol

10/199.9 = 0.05 moles of CaBr2

$0.5M=\frac{0.05mol}{x}$

x = 0.1L or 100mL

5 0

2 years ago

Can Magnesium hydroxide be used as the base for this titration? Why or why not? 5. Describe the procedure that you will follow t

kvasek [131]

Explanation:

Yes

2KHP + Mg(OH)2 = 2KOH + Mg(HP)2

KHP is an acidic salt which reacts with Mg(OH)2 which is a base via double displacement/decomposition reaction.

• One approach is to prepare the solution volumetrically using KHP crystals.

• Preparing 1 liter of 0.1 M KHP you would add 0.1 moles of KHP

Molar mass of KHP(C8H5KO4)

= (12*8) + (5*1) + 39 + (16*4)

= 204 g/mol

Number of moles = mass/molar mass

= 20.4/204

= 0.1 mol.

• This is added to a 1 liter volumetric flask, add deionized water until near the fill line, stopper and mix

Number of moles = molar concentration * volume

= 0.025 * 0.100

= 0.0025 mol

Equation for the reaction:

Ba(OH)2 + 2KHP --> Ba(KP)2 + 2H2O

1 mole of Ba(OH)2 reacted with 2 moles of KHP. By stoichiometry,

Number of moles of Ba(OH)2 = 0.0025/2

= 0.00125 mol.

Molarity = number of moles/volume

= 0.00125/0.01

= 0.125 M of Ba(OH)2.

4 0

2 years ago

Convert a speed of 259 cm/s to units of inches per minute. Also, show the unit analysis by dragging components into the unit‑fac

igomit [66]

Answer:

$6118.11\frac{in}{min}$

Explanation:

Hello,

In this case, by knowing that 1 inch equals 2.54 cm and 60 seconds equals 1 min, the resulting value results:

$=259\frac{cm}{s}*\frac{1in}{2.54cm}*\frac{60s}{1min}\\ \\=6118.11\frac{in}{min}$

Best regards.

5 0

3 years ago

Why is stability of compounds essential

yuradex [85]

Answer:

chemical stability is important to consider in the comprehensive assessment of pharmaceutical properties, activity, and selectivity during drug discovery.

7 0

2 years ago

Read 2 more answers