Calculate the molar mass

In 2021 the James Webb Telescope will begin operation focusing on infrared wavelengths and must be kept extremely _______.

faust18 [17]

In 2021 the James Webb Telescope will begin operation focusing on infrared wavelengths and must be kept extremely cold.

<h3>What is James Webb Telescope?</h3>

The James Webb Telescope is the most important optical telescope present in space, which is employed by astronomers to observe celestial bodies and physical phenomena in the universe.

This space telescope (James Webb Telescope) is based on the infrared wavelengths that cover a specific length of 0.57 to 28-micrometer waves and enable to observe different spectra across the Universe.

In conclusion, in 2021 the James Webb Telescope will begin operation focusing on infrared wavelengths and must be kept extremely cold.

Learn more about the James Webb Telescope here:

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5 0

2 years ago

Gallium has two naturally occurring isotopes, 696a (isotopic mass 68.9256 amu, abundance 60.11%) and 716a (isotopic mass 70.9247

avanturin [10]

Answer:

Atomic mass of Gallium is 69.7230 amu

Explanation:

100 atoms of gallium contains 60.11 number of $^{69}\textrm{Ga}$ atoms and 39.89 number of $^{71}\textrm{Ga}$ atoms.

Therefore atomic mass of gallium is given by-

$\frac{(60.11\times atomic mass of ^{69}\textrm{Ga})+(39.89\times atomic mass of ^{71}\textrm{Ga})}{100}$

= $\frac{(60.11\times 68.9256 amu)+(39.89\times 70.9247 amu)}{100}$

= 69.7230 amu

4 0

3 years ago

How many moles of Ca are in 7.2x10^25 molecules of Ca<br> (show work)

Gre4nikov [31]

Answer:

<h2>119.60 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{7.2 \times {10}^{25} }{6.02 \times {10}^{23} } \\ =119.60132...$

We have the final answer as

<h3>119.60 moles</h3>

Hope this helps you

5 0

3 years ago

Name each of the following molecular binary compounds:

Tanya [424]

Answer:

Explanation:

From the given information; we are to assign the correct naming for the molecular binary compounds.

01. CaCl2 → Calcium CHloride

02. HI (g) → Hydrogen mono iodide gas

03. HI (aq) → Hydroiodic acid

04. BH3 → Borontrihydride

05. Cl2O6 → Dichlorine hexoxide

06. ClF → Chlorine monoflouride

07. P2Cl4 → Phosphorus tetrachloride

08. I2O5 → Diiodine pentaoxide

09. BrF5 → Bromine pentaflouride

10. HBr(aq) → Hydrobromic acid

11. IF7 → Iodine heptaflouride

12. NF3 → nitrogen triflouride

13. H2Se(aq) → hydroselenic acid

14. BrCl → Bromine monochloride

15. H2Se(g) → Hydrogen Selenide

16. SnO2 → Tindeoxide

17. HBr(g) → Hydrogenbromide gas

18. AsF3 → Arsenic triflouride

19. N2O3 → Dinitrogentrioxide

20. IF4 → Iodine pentafluoride

01. hydroiodic acid → HI (aq)

02. hydrogen monoiodide gas → HI (g)

03. diiodine tetraoxide → I2O4

04. bromine monofluoride → BrF

05. silicon tetrahydride → SiH4

06. tetraphosphorus hexaoxide → P4O6

07. disulfur monoxide → S2O

08. carbon monooxide → CO

09. hydrogen monochloride gas → Hcl

10. tetraphosphorus decaoxide → P4O10

11. dibromine monoxide → Br2O

12. dinitrogen tetrafluoride → N2F4

13. disilicon hexahydride → SiH6

14. tetraarsenic hexaoxide → As4O6

15. hydrochloric acid → HCl (aq)

16. arsenic trihydride → AsH3

17. iodine heptafluoride → IF7

18. bromine dioxide → BrO2

19. disulfur decafluoride → S2F10

20. dichlorine heptaoxide → Cl2O7

4 0

3 years ago

Ine element and compound with example.

SOVA2 [1]

Explanation:

an element is a substance which cannot be spilt upto two or more simple substances.For eg gold,silver
a compound is the substance produced by the union of two or more elements in a definite proportion by weight .For eg water,carbon dioxide
I dont know
A mixture is a substance formed by mixing two or more elements are compounds in any proportion by mass .Its types are:Hetregeneous mixture and homogeneous mixture.

the difference between mixture and compound is that a mixture is a substance formed by mixing two or more elements are compounds in any proportion by maths and compound is a substance produced by the union of two or more elements in a definite proportion by weight.
chemical equation is defined as the symbolic representation of a chemical reaction

5 0

3 years ago