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Lera25 [3.4K]
3 years ago
12

The melting points and boiling points of 4 substances are shown.

Chemistry
1 answer:
Serggg [28]3 years ago
4 0

Answer:

it's

C. with melting point 11° C and boiling point 181° C

Explanation:

i hope you got it

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Please help im doing a test right now!!
lubasha [3.4K]

Answer:

the first one is correct

Explanation:

the most reactive metals reat with cold water quickly but tn interactive one can't

8 0
3 years ago
Read 2 more answers
Explain what is meant by the phrase mass is conserved.’
Alisiya [41]

Answer:

in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.

Explanation:

5 0
2 years ago
Read 2 more answers
when 10.00 g of phosphorus reacts with oxygen, it produces 17.77 g of a phosphorus oxide. This phosphorus oxide was found to hav
Alex_Xolod [135]

Answer:

Molecular formula = P₄O₆

Explanation:

P(s)         +        O₂(g)------------------------------------⇒ PₓOₙ (g)

10g                     (17.77-10)g                                    17.77g

10g                        7.77g                                          17.77g  (gramme ratio)

The molecular mass of Phosphorus  (P) = 31g/mole

The molecular mass of Oxygen atom (O) = 16g/mole

Mole ratio is given by:

P              :             O

10/31                    7.77/16

0.3226       :         0.4856                Mole ratio---------------------------- (1)

Divide (1)  through by 0.3226

 1                 :        1.5-------------------------------------------- (2)

From  (2), the empirical formula for Phosphorus oxide :

Empirical formula = P₁O₁.₅

                               =  PO₁.₅

The molecular formula can be calculated from below:

Since the molecular formula is a multiple of the empirical formula we have

Molecular formula = (PO₁.₅)ₙ----------------------------------- (3)

Since we are given the molecular mass of the oxide formed, we have:

(PO₁.₅)ₙ = 220-----------------------------(4)

[31 + (16 x 1.5)] x n = 220

[31 + 24]n = 220

55n =220

n = 4

Substituting into (3), we have :

Molecular formula = (PO₁.₅)₄

                               = P₄O₆

8 0
3 years ago
What is mole in chemistry?
Zigmanuir [339]

Answer:

the animal

Explanation:

a rodent thas in the ground

6 0
3 years ago
Complete these equations for the ionization of an Arrhenius acid or base in water. Include the states of the products.
Mazyrski [523]
1)
 HI(aq) → H⁺(aq) + I⁻(aq)
So this is an Arrhenius acid because it releases H⁺.

2)
LiOH(s) → Li⁺ + OH⁻
So this is an Arrhenius base because it releases OH⁻
3 0
3 years ago
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