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Sidana [21]
3 years ago
11

Which statement describes characteristics of a concave lens?

Physics
2 answers:
geniusboy [140]3 years ago
8 0
Concave is when it is inward.
stiv31 [10]3 years ago
5 0
I dont know what the statements are but concave lens are thinner in the middle which cause light to diverge or scatter
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A compunds whose empirical formula is xf3 consists of 65% f by mass. what is the atomic mass of x
Reika [66]

Empirical formula of compound is XF3

Compound consist of 65% F

In 100g of compound there is 65 g of F

= 65 / 19 moles of Fluorine = 3.421 moles

So moles of X = 3.421 / 3 = 1.140 moles

And in 100 g  X consist of 35 g

So the molar mass of X = 35 / 1.140 = 30.71 g = 31 approximately

And it is the mass of phosphorus

So the empirical formula for the compound is PX3

4 0
3 years ago
Read 2 more answers
The atomic mass of nitrogen is 14.01, hydrogen is 1.01, sulfur is 32.07, and oxygen is 16.00. What is the molar mass of ammonium
MArishka [77]

The molar mass of ammonium sulphate [(NH4)2SO4] is 132.17 g (option E). Details about molar mass can be found below.

<h3>How to calculate molar mass?</h3>

The molar mass of a substance can be calculated by adding the atomic masses of the elements in the compound.

According to this question, the atomic mass of nitrogen is given as 14.01, hydrogen is 1.01, sulfur is 32.07, and oxygen is 16.00.

The molar mass of ammonium sulphate is as follows:

[(NH4)2SO4] = [14.01 + 1(4)]2 + 32.07 + 16.00(4)

= 36.02 + 32.07 + 64

= 132.09

Therefore, the molar mass of ammonium sulphate [(NH4)2SO4] is 132.17 g.

Learn more about molar mass at: brainly.com/question/12127540

#SPJ1

4 0
2 years ago
Networks of interconnected wireless devices that are embedded into the physical environment to provide measurements of many poin
bazaltina [42]

Wireless sensor networks

Explanation:

Networks of interconnected wireless devices that are embedded into the physical environment to provide measurements of many points over a large spaces are called Wireless sensor networks.

They are very useful in obtaining real-time data and information about every day life.

  • The internet of things greatly relies on the use of wireless sensor networks in devices and gadgets to better and improve life.
  • They are constantly in use by various organizations and bodies.
  • Wireless sensor networks can be designed to collect specific scientific data or even more.

learn more:

Connecting IoT devices brainly.com/question/11028028

#learnwithBrainly

6 0
3 years ago
_____ has a longer wavelength than _____.
victus00 [196]

Answer:

B

Explanation:

its b ok ok bye

7 0
2 years ago
How many dots must be added to the symbol to properly represent a standard nitrogen ion? A) 1 B) 3 C) 5 D) 8
Vedmedyk [2.9K]

Answer:

D

Explanation:

4 0
3 years ago
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