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navik [9.2K]
3 years ago
15

Consider the following reaction:

Chemistry
1 answer:
Goshia [24]3 years ago
3 0

Answer:

2.01

Explanation:

First, let's convert grams to moles

(Na) 22.99 + (F) 18.998 = 41.988

Every mole of NaF is  41.988 grams

21/41.988 = 0.500143 moles of NaF

For every Cr+3, we will need 2 NaF, so Cr+3 will be half of NaF

0.500143/2 = 0.250071

molarity = moles/liters

0.250071/0.125 = 2.0057 M

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Atmosphere pressure is about 100000 Pa. Calculate the force of the Atmosphere on a person whose Surface area is 2.0m
Sedaia [141]

Answer:

The force of the atmosphere 200 KN.

Explanation:

Pressure is the ratio of force applied to the area  to which the force is applied.

i.e Pressure = \frac{Force}{Area}

But, Pressure = 100000 pa (100000 N/ m^{2}), and surface area = 2.0 m^{2}

Thus,

100000 = \frac{Force}{2.0}

⇒ Force = 100000 x 2.0

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Force = 200 KN

The force of the atmosphere 200 KN.

7 0
3 years ago
The compound Rh(CO)(H)(PH3)2 forms cis and trans isomers. Use this information
Thepotemich [5.8K]

The geometry of a complex is determined by the number of ligands that surround the central atom/ion. There are four ligands in the complex. The coordination number of the complex is 4. The oxidation number of Rh is zero. The preferred geometrical shape of this complex is square planar.

Complexes are formed when Lewis bases called ligands become attached to a central metal atom or ion. The coordination number of the complex refers to the number of ligands that surround the central metal atom/ion.

In this case, four ligands surround the central Rhodium atom in a zero oxidation state.

Since we were told that the compound exhibits cis/trans isomerism then it can not have a tetrahedral geometry. It must have a square planar geometry as tetrahedral complexes do not exhibit cis/trans isomerism.

The image of the  cis- and trans- geometrical isomers of the compound is attached to this answer.

Learn more: brainly.com/question/9616145

5 0
3 years ago
What material could be used for a cup to keep coffee hot
nata0808 [166]

Answer:

Your answer could be: ceramic or stainless steel.

Explanation:

Glass, ceramic, and stainless steel are all good insulating materials for keeping coffee hot. Although, if you don't want to possibly burn yourself, don't use glass.

Have a great day/night! ^^

4 0
3 years ago
Name the parts of an electromagnet
Oxana [17]

Answer:

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Explanation: Me

7 0
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How does the environment influence natural selection?
Nonamiya [84]
The environment affects natural selection. Speices need to adapt to changes in environmnet. The weaker organisms which fail to adapt to environment perish while the stronger ones who adapt to the environment survive. This is how environment affects natural selection.
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3 years ago
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