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3 years ago

Can hydrobromic acid be a valid chemical formula?

1 answer:

7 0

Yes, it can - HBr is its chemical formula.
If you had other options though, then the one which wouldn't be a valid chemical formula is aluminum (III) chloride, because, since it only has one charge (+3), it is unnecessary to state it as III.

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d)Cho biết khi làm thí nghiệm với dung dịch hóa chất nào dưới đây bóng đèn cháy sáng: dịch dạ dày, nước vôi trong, giấm ăn, nước

AVprozaik [17]

Answer:

I cant help can you translate to English?

6 0

3 years ago

Write the symbol for the ion with 68 electrons, 72 protons, and 106 neutrons.

galina1969 [7]

Answer:

I think it should be Hafnium which is Hf.

8 0

3 years ago

0.378g grams of a compound is made up of 0.273g of Mg and 0.105g nitrogen. Find its empirical formula.

Harrizon [31]

Answer:

The empirical formula of the compound is $Mg_3N_2$ .

Explanation:

Mass of magnesium in compound = 0.273 g

Mass of nitrogen in the compound = 0.105 g

Moles of magnesium = $\frac{0.273 g}{24.305 g/mol}=0.0112 mol$

Moles of nitrogen = $\frac{0.105 g}{14.0067 g/mol}=0.00750 mol$

Form empirical formula divides the lowest value of moles of an element present with all the moles of elements present.

Magnesium $=\frac{0.0112 mol}{0.00750 mol}=1.5$

Nitrogen $=\frac{0.00750mol}{0.00750 mol}=1$

The empirical formula of a compound:

$Mg_{1.5}N_1=Mg_{\frac{15}{10}}N_1=Mg_{15}N_{10}=Mg_3N_2$

The empirical formula of the compound is $Mg_3N_2$ .

3 0

3 years ago

What is the mass of the light bulb? a. 425.6 g b. 204.6 g c. 240.56 g d. 245.64 g

VMariaS [17]

245.64 g is the mass of the light bulb.

Mass is a physical body's total amount of matter. Inertia, or the body's resistance to acceleration when a net force is applied, is also measured by this term. The strength of an object's gravitational pull to other bodies is also influenced by its mass. The kilogram serves as the SI's fundamental mass unit.

For a body, mass is constant. Mass can be calculated using the formula: mass = volume density. A mass's weight is a measurement of the gravitational force at work on it. The kilogram is the SI unit of mass.
The mass of the substance will therefore be calculated as follows: MASS OF A SUBSTANCE = VOLUME DENSITY.

So finally we can say that the mass of the light bulb and paperclips together is 245.64 g.

To know more about Mass please click here : brainly.com/question/19385703

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4 0

2 years ago

An unknown element, x, reacts with rubidium to form the compound rb2x. in other compounds this element also can accommodate up t

SVETLANKA909090 [29]

There are few elements that can form 12 electron rather than the usual 8. Therefore these are the possible answers:

Sulfur = 2Na + S --> Na2S <span>
Selenium = 2Na + Se --> Na2Se
<span>Tellurium = 2Na + Te --> Na2Te</span></span>

6 0

3 years ago