All categories

3 years ago

Ill upvote

Chemistry

1 answer:

ELEN [110]3 years ago

8 0

D/T=V
8000/12 = 666.666666667 speed
just round the answer and you'll get to 667 m/s

You might be interested in

a 1.00-l solution contains 2.50×10-4 m cu(no3)2 and 1.20×10-3 m ethylenediamine (en). the kf for cu(en)22 is 1.00 × 1020. chegg

Debora [2.8K]

The concentration of copper in the solution is

$5.1 \times 10^{18} \: M.$

The volume of the solution = 1.00 L

$Moles \: of \:Cu(NO_{3}) _{2} = 2.50 \times 10 {}^{ - 4}$

$Moles \: of \: Ethylenediamine = 1.20 \times 10.3$

$k _{f} = 1.00 \times 10^{20}$

Overall balanced equation of reaction is,

$Cu^{2 + }(aq) \: + 2en \: (aq)→ Cu(en) ^{2 + }_{2}(aq)$

$Moles \: of \:Cu(NO_{3}) _{2} =0.00025 \: mol$

Mole ratio for,

$Moles \: of\:Cu(NO_{3}) _{2}: en$

$2: 1$

$Moles \: of \: en = 0.000250 \times 2$

$= 0.00050 \: moles$

Remained moles of en are= (0.00120-0.000500)

$= 0.000700 \: moles$

The concentration of copper in the solution is,

$k_{f} = \frac{Cu(en)^{2 + }_{2} }{Cu^{2+}en^{2} }$

$1.00 \times 10 ^{20} = \frac{0.000250}{(Cu )^{2 +} \times (0.000700)^{2 + } }$

$= 5.1 \times 10^{18} \: M.$

Therefore, the concentration of copper in the solution is

$5.1 \times 10^{18} \: M.$

To know more about molarity, refer to the below link:

brainly.com/question/8732513

#SPJ4

4 0

2 years ago

Kalia spent a quarter of her weekly allowance on a movie. The movie was $4.75. What is her weekly allowance?

olchik [2.2K]

Answer:

$17

Explanation:

$4.75 is equal to 0.75 * x value, where x is the weekly allowance

$4.75=0.75x

$17=x

7 0

2 years ago

1. What role do you think popular belief has on scientific discoveries?

IgorLugansk [536]

Answer:

1- it is influencing research

2- yes, then explain what and why

Explanation:

sorry if didnt help had to type this a light speed or my teacher see

3 0

3 years ago

Read 2 more answers

What's the difference between a conductor and an insulator? I'll mark you as brainliest

irina [24]

conductor are defined as the materials or substances that allow electricity to flow through them. Also, conductors allow heat to be transmitted through them. Examples of conductors are metals, the human body, Earth and animals. The human body is a strong conductor.

Any material that keeps energy such as electricity, heat, or cold from easily transferring through is an insulator. Wood, plastic, rubber, and glass are good insulator.

Explanation:

have a beautiful day

8 0

3 years ago

Read 2 more answers

How are strong acids and strong bases similar?

Lady_Fox [76]

Answer:

An acid or base which strongly conducts electricity contains a large number of ions and is called a strong acid or base and an acid or base which conducts electricity only weakly contains only a few ions and is called a weak acid or base.

5 0

3 years ago