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Sliva [168]
3 years ago
9

A teacher makes the following statement.

Chemistry
2 answers:
Sergeu [11.5K]3 years ago
8 0
The teacher is mostly talking about Gasoline
Ann [662]3 years ago
7 0

The teacher is talking about evaporation of a mixture. You can tell because she mentions that each part of gasoline, a mixture, has a different melting point.

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How many millimeters of 12 M HCI will be needed to create a 250-ML solution of 2 HCI?
Anestetic [448]
Call what you have to find is x
nHCl/V=12M 
nHCl=2.0,25=0,5 
->x=0,5.12=6 (600 ml)
6 0
3 years ago
Element X has an electron configuration of 2-8-3. This element will combine with the phosphate ion to form a compound with the f
Alinara [238K]
X element can give 3 electrons, and ions X³⁺ can be formed.
Phosphate ion - (PO4)³⁻,
So compound will have formula  X³⁺(PO4)³⁻,
XPO4
5 0
3 years ago
Read 2 more answers
Calcium hydroxide is titrated with nitric acid. What volume of 0.0200 M calcium hydroxide is required to neutralize 35.00 ml of
gogolik [260]

Answer:

43.75 ml

Explanation:

Given that the equation of the reaction is;

2HNO3(aq) + Ca(OH)2(aq) ---> Ca(NO3)2(aq) + 2 H20(l)

Concentration of acid CA= 0.05 M

Concentration of base CB = 0.02 M

Volume of acid VA = 35.00ml

Volume of base VB= ???

Number of moles of acid NA= 2

Number of moles of base NB=1

From

CAVA/CBVB= NA/NB

Making VB the subject of the formula;

VB= CAVANB/CBNA

VB= 0.05 × 35 × 1/ 0.02 × 2

VB=1.75 /0.04

VB= 43.75 ml

8 0
3 years ago
Help, also brainly dont be mean and delete this.
n200080 [17]

Answer:

I dont understand what is the question you need help on-

Explanation:

8 0
3 years ago
How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3(PO4)2?
hoa [83]
The correct answer is answer choice C, three. In the formula Ca3 (P O4)2, there are 3 atoms of calcium (Ca), 2 atoms of phosphorus (P), and 8 atoms of oxygen (O). You can tell this by looking at the subscripts (or numbers, in this case, since you can't type subscripts). The subscript applies to the number directly beside it. Furthermore, if you have parentheses with a number beside it, just distribute. In this problem, we have (P O4)2.

(P O4) 2   Given
P2 O8   Distribute
We now have 2 atoms of phosphorus and 8 atoms of oxygen. 

This problem has decided to be nice and just ask for calcium, so we don't have to distribute. All you have to do for this problem is look at the subscript beside Ca, which is 3. Therefore, the correct answer is C.
6 0
3 years ago
Read 2 more answers
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