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3 years ago

Which element reacts spontaneously with 1.0M HCl (aq) at room temperature?

Chemistry

2 answers:

Ad libitum [116K]3 years ago

8 0

(4) zinc.................

Kaylis [27]3 years ago

4 0

(4) Zinc is correct answer. Others don't react at room temperature with HCl because their reactivity (capability to react) is quite low.

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Atomic mass unit is calculated with reference to

Gennadij [26K]

An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12. The mass of any isotope of any element is expressed in relation to the carbon-12 standard. For example, one atom of helium-4 has a mass of 4.0026 amu. An atom of sulfur-32 has a mass of 31.972 amu.

8 0

3 years ago

Read 2 more answers

Please help me.

kirza4 [7]

Taking into account the definition of density, the density of the sample is 0.5 $\frac{g}{mL}$ .

It is necessary yo know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density allows you to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

$density=\frac{mass}{volume}$

In this case, you know:

mass= 6 g
volume= 12 mL

Then, replacing in the definition of density:

$density=\frac{6 g}{12 mL}$

Solving:

density= 0.5 $\frac{g}{mL}$

Finally, the density of the sample is 0.5 $\frac{g}{mL}$ .

Learn more about density:

7 0

3 years ago

Mg + __C12 = ____MgCl2

Gnom [1K]

Explanation:

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3 0

3 years ago

The motion of atoms and molecules that most affects temperature is

Oliga [24]

A solid to a liquid, the boiling of water, solid the water molecules vibrate condensed but as a liquid they are still isolated in a controlled area and also reflect off one another more, liquid to a gas they do not and move freely until condensation occurs

3 0

4 years ago

The amount of a chemical solution is measured to be 2 liters.

irinina [24]

2 liters may be 1.5 to 1.9 rounded up to 2 or 2.1 or 2.4 rounded down to 2.

2 - 1.5 = 0.5

percent error = (absolute error / quantity) * 100

percent error = 0.5/2 * 100% = 0.25 * 100% = 25%

Choice C. 25%.

3 0

3 years ago