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Papessa [141]
3 years ago
12

MgCI2 how many element ?

Chemistry
1 answer:
polet [3.4K]3 years ago
7 0

Answer:

2 elements magnesium(Mg) and chlorine (Cl)

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Please hep its my last question
atroni [7]

Answer:Noble gases:

 are highly reactive.

 react only with other gases.

 do not appear in the periodic table.

 are not very reactive with other elements.

Explanation:Noble gases:

 are highly reactive.

 react only with other gases.

 do not appear in the periodic table.

 are not very reactive with other elements.

7 0
3 years ago
Predict the products of hydrobromic acid, H B r , reacting with magnesium hydroxide, M g ( O H ) 2 . Select one or more:
Aliun [14]

Answer:

Magnesium bromide, MgBr2, and water, H2O.

Explanation:

Hello!

In this case, since HBr is an acid and Mg(OH)2 is a base, an acid-base reaction is undergone, by which a salt and water are produced as neutralization products:

HBr+Mg(OH)_2\rightarrow MgBr_2+H_2O

However, it need to be balanced since two bromine atoms are produced, therefore we write:

2HBr+Mg(OH)_2\rightarrow MgBr_2+2H_2O

Thus, the products are magnesium bromide, MgBr2, and water, H2O.

Best regards!

6 0
3 years ago
What is unique about the way that transition metals form compounds?
Alika [10]

Answer:

<u><em>A. They don't form compounds</em></u>

Explanation:

  • High density: The strong bonding between the atoms in transition metals cause them to be tightly held together, creating a high density. Colored compounds: Transition metals tend to form more colored compounds than other elements, either in solid form or dissolved in a solvent.
4 0
3 years ago
Read 2 more answers
A sample of o2 gas (2.0 mmol) effused through a pinhole in 5.0 s. it will take __________ s for the same amount of co2 to effuse
s344n2d4d5 [400]
Answer is: 5,9.
Effusion is leakage of gas through a small hole. Gases with a lower molecular mass effuse more speedy than gases with a higher molecular mass. R<span>elative rates of effusion is related to the molecular mass.
</span>M(O₂) = 32g/mol.
M(CO₂) = 44g/mol.
t₁ = 5s.
t₂ = ?
t₂/t₁ = √(M(CO₂)/M(O₂)).
t₂ = 1,17·5s = 5,9s.

8 0
4 years ago
Read 2 more answers
The label on a ready-to-eat cereal box indicates that 1 cup contains 32 grams of carbohydrate, 4 grams of protein, and 2 grams o
eduard

Energy given by carbohydrates present in one cup =32 g * \frac{4 kcal}{1 g} = 128 kcal

Energy given by proteins present in one cup = 4 g * \frac{4 kcal}{1 g} = 16 kcal

Energy given by fat in one cup = 2 g * \frac{9 kcal}{1 g} = 18 kcal

Total energy in one cup of cereal box = 128 kcal + 16 kcal + 18 kcal = 162 kcal

Energy present in two cups = [tex] 2 cups * \frac{162 kcal}{1 cup} *

= 324 kcal

6 0
4 years ago
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