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3 years ago

Write a balanced equation for each reaction. KOH(aq) + H3PO4,(aq)

Chemistry

1 answer:

steposvetlana [31]3 years ago

3 0

Answer:

3 KOH(aq) + H3PO4(aq) = K3PO4(aq) + 3 H2O

Explanation:

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Equal volumes of hydrogen and helium gas are at the same pressure. The atomic mass of helium is four times that of hydrogen. If

OverLord2011 [107]

Answer:

The ratio of the temperature of helium to that of hydrogen gas is 2:1.

Explanation:

Atomic mass of hydrogen = M

Temperature of hydrogen gas =T

Pressure of the hydrogen gas = P

Mass of the hydrogen gas = m

Moles of the hydrogen gas = $n=\frac{m}{2M}$

Volume of the hydrogen gas = V

Using an ideal gas equation:

$PV=nRT=PV=\frac{mRT}{M}$ ...(1)

Temperature of helium gas =T'

Pressure of the helium gas = P'= P

Mass of the helium gas = m' =m

Moles of the helium gas = $n'=\frac{m}{M'}=\frac{m}{4M}$

Volume of the helium gas = V' = V

Using an ideal gas equation:

$P'V'=n'RT'=\frac{mRT'}{4M}$ ...(2)

Divide (2) by (1)

$\frac{P'V'}{PV}=\frac{\frac{mRT'}{4M}}{\frac{mRT}{2M}}$

$\frac{T'}{T}=\frac{2}{1}$

The ratio of the temperature of helium to that of hydrogen gas is 2:1.

7 0

3 years ago

Using the periodic table, which of the following elements has the most properties in common with calcium (Ca)?

Amiraneli [1.4K]

atoms are made of 3 types of sub atomic particles; electrons, protons and neutrons

Of these particles, electrons are involved in the chemical reactions.

Therefore chemical properties of the element are determined by the electrons, and that too mostly the valence electrons. Valence electrons are the electrons in the outermost energy shell.

Atoms with same number of valence electrons have similar chemical properties. atoms having same number of valence electrons are classified into groups.

So elements of the same group have same number of valence electrons, hence similar chemical properties

Ca has 2 valence electrons so it belongs to group 2. Of the given elements

only Mg belongs to group 2. Therefore Mg has the most common properties with Ca

4 0

4 years ago

Read 2 more answers

Oxygen is a reactant of___(1)___while being the product for___(2)___.

yuradex [85]

Answer:

Oxygen is a reactant of cellular respiration, while being the product for photosynthesis

Explanation:

Photosynthesis

carbon + water + sunlight -> oxygen and glucose

Cellular respiration

oxygen + glucose -> carbon + water + ATP

6 0

3 years ago

Can someone please Help

Anestetic [448]

Explanation:

hello,

symbol : Al

atomic no : 13

these can easily be obtained from the periodic table.

8 0

2 years ago

Which of the following is a product when a solution of MgCl2(aq) is mixed with a solution of Pb(NO3)2(aq)?

marta [7]

<u>Answer:</u> The product formed in the solution is $PbCl_2(s)$

<u>Explanation:</u>

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

$AB+CD\rightarrow AD+CB$

The chemical equation for the reaction of magnesium chloride and lead nitrate follows:

$MgCl_2(aq.)+Pb(NO_3)_2(aq.)\rightarrow PbCl_2(s)+Mg(NO_3)_2(aq.)$

By Stoichiometry of the reaction:

1 mole of aqueous magnesium chloride reacts with 1 mole of aqueous lead nitrate to produce 1 mole of solid lead chloride and 1 mole of aqueous magnesium nitrate

Hence, the product formed in the solution is $PbCl_2(s)$

5 0

3 years ago

Write a balanced equation for each reaction. KOH(aq) + H3PO4,(aq)​

Write a balanced equation for each reaction. KOH(aq) + H3PO4,(aq)