What is the name of the salt with the structure K2S

Indicate the number of protons, neutrons, and electrons in each of the following species: 15N7, 33S16, 63Cu29, 84Sr38, 130Ba56,

evablogger [386]

Answer:

1. 7 protons, 7 electrons, 8 neutrons

2. 16 protons, 16 electrons, 17 neutrons

3. 29 protons, 29 electrons, 34 neutrons

4. 38 protons, 38 electrons, 46 neutrons

5. 56 protons, 56 electrons, 74 neutrons

6. 74 protons, 74 electrons, 112 neutrons

7. 80 protons, 80 electrons, 122 neutrons

7 0

3 years ago

Calcule la normalidad de una solución

tensa zangetsu [6.8K]

Answer:

si por favor

Explanation:

5 0

3 years ago

Check the boxes next to events or trends that first occurred in science from about 1700. Darwin published his theory of natural

marishachu [46]

Check the boxes next to events or trends that first occurred in science from about 1700.

X Darwin published his theory of natural selection.

-Darwin published his work in 1859.

X Archimedes described the principle of the lever.

-Archimedes discovered this during the third century BC (300-201 BC)

/ Scientific societies and academies were formed.

-These were formed around 1789

X The double-helix structure of DNA was determined.

-IT was discovered in 1953 by James Watson and Francis Crick.

X Copernicus proposed a Sun-centered universe.

-It was proposed in the 16th century.

X Continental drift was explained by the theory of plate tectonics.

-It was proposed at around 1910 till 1950 but was accepted at 1960.

X The Earth was proven to be spherical.

-It was argued at around 384-322 BC.

4 0

3 years ago

Read 2 more answers

Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1. Which of the following would represent an ionic c

astra-53 [7]

The formula that would represent an ionic compound that is composed of calcium and iodide ions is CaI2

Explanation

Ionic compound CaI₂ is formed when Calcium form cation ( a positively charged ion) by losing 2 electrons while two iodine atoms form anion ( a negatively charged ion) by gaining one electron each.

When writing down formula of ionic compound, the formula of cation is written first followed by anion formula. therefore Ca is written first followed by I.

The numeric subscript 2 after I(iodine) indicate that 2 atoms of iodine are involved in bonding.

5 0

3 years ago

Determine the number of atoms of O in 92.3 moles of Cr3(PO4)2

Irina18 [472]

739 is the number of atoms of O in 92.3 moles of Cr3(PO4)2.

Explanation:

Molecular formula given is = Cr3(PO4)2

number of moles of the compound is 92.3 moles

number of 0 atoms in 92.3 moles =?

From the chemical formula 1 mole of the compound has 8 atoms of oxygen

So, it can be written as

1 mole Cr3(PO4)2 has 8 atoms of oxygen

92.3 moles of Cr3(PO4)2 has x atoms of oxygen

$\frac{8}{1}$ = $\frac{x}{92.3}$

x = 8 x 92.3

x = 738.4 atoms

There will be 739 oxygen atoms in the 92.3 moles of Cr3(PO4)2.

4 0

3 years ago