Which of the following is an element? aluminum bronze table salt brass

Chemistry

2 answers:

sveta [45]2 years ago

8 0

Aluminum is an element :)

LekaFEV [45]2 years ago

8 0

Answer:

Aluminum is an element

Explanation:

Aluminum is the most abundant metal in the earths crust with an atomic number of 13.

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Calculate each of the following quantities:<br> (a) Total number of ions in 38.1 g of SrF₂

adelina 88 [10]

The total number of ions in 38.1 g of SrF₂ is 5.479 x 10²³.

Ions are the elements with a charge on them. It happens when they share electrons with other atoms to form a compound.

We have to calculate the total number of ions in 38.1 g of .

The molar mass of SrF₂ = 125.62 g/mol

The number of moles = 38.1 g of 1.0 mol / 125.62 = 0.30329 moles

Given that, total moles of SrF₂ ions in = 1.0 mol of + 2.0 moles of = 3.0 moles

Total moles of ions in 0.30329 moles of

= (0.30329 moles of SrF₂) x 3.0 / 1.0 = 0.90988 mol ions

We know that,

1.0 mole of ions = 6.023 x 10²³ ions

Thus, the number of total ions = ( 0.90988 mol ions) x 6.023 x 10²³ / 1.0 mol = 5.479 x 10²³ ions

Thus, the number of ions is in 38.1 g of 5.479 x 10²³ ions

To learn more about ions, refer to the link:

brainly.com/question/14295820

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11 months ago

Which correctly describes the relationship between genes and chromosomes?

Vlada [557]

Answer:

Chromosomes are structures within cells that contain a person's genes.

Explanation:

Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.

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The reaction between sodium and oxygen ( balanced with words)

irina1246 [14]

There will be chemical reaction(equation4Na+02--2Na20

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For SCl4, the electron domain geometry is _______(i)________ and the molecular geometry is ______(ii)________.

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The electron domain geometry is trigonal bipyramidal while the molecular geometry of the compound is seesaw.

The shapes of molecules is determined by the number of electron pairs on the valence shell of the central atom in the molecule. These electron domains include lone pairs and bond pairs.

The lone pairs only contribute towards the electron domain geometry and not the molecular geometry. SCl4 has five electron domains hence its electron domain geometry is trigonal bipyramidal. The molecular geometry of the compound is seesaw.

Learn more: brainly.com/question/6505878