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erica [24]
2 years ago
15

Compounds containing potassium and oxygen

Chemistry
1 answer:
padilas [110]2 years ago
4 0

Answer: The law of proportion states that elements combine in whole number ratios. The gram readings for K are multiples of each other, both in grams and moles.

Let us compare the ratios:

2.44 grams/1.22 grams = 2

4.89 grams/2.44 grams = 2

Therefore, Potassium always combines with Oxygen in a ratio of 2  is to 1.

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What element are usually shiny , can be bent or stretched and conduct electricity
Alik [6]

Answer:

gold and copper

Explanation:

but I think there is 1 more

8 0
3 years ago
What volume would 0.735 moles of O2 gas occupy at STP
tatiyna

Answer:

16.5 dm³

Explanation:

Data Given:

no. moles of O₂ =  0.735 moles

volume of O₂ = ?

Solution:

Now

we have to find volume of O₂ gas

Formula used for this purpose

                   No. of moles = Volume / molar volume

where

molar volume at STP for Oxygen (O₂) = 22.4 dm³/mol

              No. of moles O₂ = Volume of O₂ / 22.4 dm³/mol . . . . . .(1)

Put values in equation 1

                0.735 = Volume of O₂ / 22.4 dm³/ mol

rearrange above equation

              Volume of O₂ = 0.735 x 22.4 dm³/ mol

              Volume of O₂ = 16.5 dm³

So,

the volume of O₂ at STP is 16.5 dm³

6 0
3 years ago
Which formula represents the compound commonly known as phosphine with iupac name phosphorus trihydride? ph ph2 ph3 ph4
zubka84 [21]

C. PH3 represents a compound commonly known as phosphine, whose IUPAC name is phosphorus trihydride.

<h3>What type of bond is PH3?</h3>

The electronegativity of PH3 found in the Periodic Table of the Period attracts covalent electron pairs and creates covalent bonds. However, because the electrons are not bound, asymmetrical rate distribution occurs. Therefore, PH3 is a polar molecule with a non-polar covalent bond and currently has no polar bond.

<h3 /><h3>What defines a covalent bond?</h3>

A covalent bond consists of sharing one or more electron pairs between two atoms. These electrons are attracted to two nuclei at the same time. Covalent bonds are formed when the difference in electronegativity between two atoms is too small for electron transfer to form ions.

Click here for more information on covalent bonds brainly.com/question/12732708

# SPJ10

6 0
2 years ago
What is the frequency of electromagnetic radiation having a wavelength of 3.27 ✕ 10-8 m? s-1 What type of electromagnetic radiat
iogann1982 [59]
Hello There!

The frequency is 91.74 MHz.
It is UltraViolet Radiation.

Hope This Helps You!
Good Luck :)
4 0
3 years ago
Problem Page Suppose 25.1g of barium nitrate is dissolved in 200.mL of a 0.50 M aqueous solution of ammonium sulfate. Calculate
melomori [17]

Answer:

1.26 M

Explanation:

The ion nitrate is NO₃⁻ and the Barium is from group 2 so it forms the ion Ba²⁺, so the barium nitrate has the formula: Ba(NO₃)₂. The molar masses are: Ba: 137 g/mol, N = 14 g/mol, O = 16 g/mol, so the molar mass of barium nitrate is:

137 + 2x(14 + 3x16) = 199 g/mol

The number of moles is the mass divided by the molar mass, so:

n = 25.1/199 = 0.126 mol of Ba(NO₃)₂

In 1 mol of the salt, there are 2 moles of NO₃⁻, so the number of moles of nitrate is 0.252 mol. Nitrates formed with ammonium (that can react when the solid dissolves) and with elements from group 1 and 2 are completely soluble in water. So, the moles of nitrate will remain 0.252 mol.

The molarity is the number of moles divided by the volume (0.2 L):

[NO₃⁻]= 0.252/0.2 = 1.26 M

3 0
3 years ago
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