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IrinaVladis [17]
3 years ago
5

Put the substance in a 25 mL beaker.

Chemistry
2 answers:
kkurt [141]3 years ago
5 0

Answer: 1. Liquid

2. oily

3. no (not a solid)

Explanation:

Alexandra [31]3 years ago
4 0

Answer:

State of matter: Liquid

Appearance and texture: Oily

Crystalline structure: No not a solid

Explanation:

did the quiz and got it right

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Please help will mark brainlyist
Tema [17]

Answer:

Answer choice B

Explanation:

6Li + Ga₂S₃ => 3Li₂S + 2Ga

Given: 0.90 mole Ga Formed

Question: How many moles Li were used

Note => From the balanced equation note that 6 moles Li are required to produce 2 moles Ga. So, when mole ratios are applied, the value for moles of Lithium will be greater than the given value for the Ga yield. To take advantage of this idea stoichimetrically, use a ratio of the coefficients of Li and Ga as a multiple of the given to get a greater number of moles Li.

That is, use 6/2 x 0.90 mole => 2.7 moles Li used.

(Note: one would NOT want to use 2/6 x moles Ga b/c a number smaller than 0.9mole would be used.)

What I'm trying to share with you in this problem makes mole-mole problems very straight forward. When working chemical stoichiometry problems learn to use this rule => Convert all data to moles, apply mole ratio  of given and unknown in the balanced equation to increase or decrease magnitude of the needed answer value.

Example

Given:      N₂      +              3H₂                      => 2NH₃

           5moles      ?moles H₂ are required

moles of H₂ required = 3/1(5) moles are required = 15moles H₂

Note, the ratio of coefficients chose to multiply times given moles is 3/1 because the value of H₂ must be larger than 5 moles b/c coefficient for H₂ is larger than coefficient for N₂. If 1/3 was chosen times the given 5 moles N₂ then the math gives 1/3(5) = 1.67 mole which is incorrect as it must be greater than 5 and the coefficients in the standard equation shows H₂ larger than N₂.

Using the 15 moles H₂ as the known reagent, how many moles NH₃ would be formed:

Note: In the balanced equation the coefficient for NH₃ is smaller than the coefficient for H₂. So, the answer must be smaller than 15; so use the mole coefficient ratio of 2/3 x known => a value smaller than the known and the correct answer. That is ...

moles NH₃ produced from 15 moles H₂ = 2/3(15) moles NH₃ formed = 10 moles NH₃ produced.

Note the moles NH₃ produced ( = 10 moles) is smaller than the given 15 moles of H₂ used.

7 0
2 years ago
An atom has the electron configuration of 1s22s22p5 how many electrons are in that atom
notsponge [240]

Answer:

There are 9 electrons in this atom.

Explanation:

Electron configuration of this atom: 1s^2\, 2s^2\, 2p^5.

The electron orbitals of an atom are denoted as 1s, 2s, 2p, 3s, 3p, etc. At any given time, an electron in this atom is located in exactly one orbital.

The electron configuration of an atom gives the number of electrons in each orbitals of this atom.

For example, in this atom, the superscript "2" on the right of "1s" means that there are two electrons in the 1s\! orbital of this atom. Hence, 1s^2\, 2s^2\, 2p^5 would translate to:

  • The 1s orbital of this atom contains 2 electrons.
  • The 2s orbital of this atom contains 2 electrons.
  • The 2p orbitals of this atom contain 5 electrons.

Hence, there would be 2 + 2 + 5 = 9 electrons in total in this atom.

7 0
3 years ago
Aside from silica gel and alumina what other stationary phase can you use in chromatography​
Svetlanka [38]

Answer:

Paper

Explanation:

In chromatographic separation, two different phases are important; a stationary phase and a mobile phase.

The stationary phase is the phase that does not move. Substances are separated based on how fast or slowly they move in the stationary phase.

The mobile phase is usually the solvent(or mixture of solvents) that carries the solutes through the stationary phase.

The stationary phase is usually composed of a porous material. Paper is a porous material. The mobile phase is trapped between the cellulose fibers of the paper and separation is achieved.

7 0
3 years ago
1.What zodiac sign is October 19,2006?<br> A). Sagittarius<br> B). Libra<br> C). Leo<br> D). Pisces
MrMuchimi

Answer:

B. Libra

Explanation:

Libra's range from September 23rd to October 22nd

5 0
3 years ago
Read 2 more answers
Please help, its science -&gt;-
WITCHER [35]

Answer:

quantitative

Explanation:

7 0
3 years ago
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