Which solution will boil at the highest temperature? *

Which particle has the least mass?(1) alpha (3) neutron (2) beta particle (4) proton

ivann1987 [24]

Alpha particle has a mass of 4 (Two protons and two neutrons)
Neutron has a mass of 1
Beta particle has a mass of about 0 (Electron)
Proton has a mass of 1
So the answer is (2) Beta particle

4 0

3 years ago

Aluminum, silicon, and oxygen form minerals known as aluminosilicates. How many moles of aluminum are in 0.900 moles of pyrophyl

wlad13 [49]

Answer:

There are 1.8 moles of aluminum.

Explanation:

To solve this problem we need to convert moles of pyrophillite (Al₂Si₄O₁₀(OH)) into moles of aluminum (Al):

In one mol of Al₂Si₄O₁₀(OH) there are two moles of Al.

With the above information in mind we can now do the conversion:

0.900 moles Al₂Si₄O₁₀(OH) * $\frac{2molAl}{1molAl_2Si_4O_{10}(OH)}$ = 1.8 mol Al

Thus the answer is that there are 1.8 moles of aluminum.

3 0

4 years ago

How many grams of NaCI are contained in 350. mL of a 0.115 M solution of sodium chloride?

Sergio039 [100]

Answer: 2.35 (no unit given)

Explanation:

5 0

3 years ago

Fragilidad de metales

Lemur [1.5K]

Answer: La fragilidad es la propiedad de algunos metales de no poder experimentar deformaciones plásticas, de forma que al superar su límite elástico se rompen bruscamente. La acritud es la propiedad de un metal para aumentar su dureza y su resistencia por el efecto de las deformaciones.

Explanation: y estas en el Brianly de ingles no el de español.

7 0

3 years ago

In which reaction does the oxidation number of hydrogen change? In which reaction does the oxidation number of hydrogen change?

dedylja [7]

Answer: The correct answer is $2Na(s)+2H_2O(l)\rightarrow 2NaOH(aq.)+H_2(g)$

Explanation:

Oxidation number is defined as the number which is given to an atom when it looses or gains electron. When an atom looses electron, it attains a positive oxidation state. When an atom gains electron, it attains a negative oxidation state.

Oxidation state of the atoms in their elemental state is considered as 0. Hydrogen is present as gaseous state.

For the given chemical reactions:

Reaction 1: $2HClO_4(aq.)+CaCO_3(s)\rightarrow Ca(ClO_4)_2(aq.)+H_2O(l)+CO_2 (g)$