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beks73 [17]
3 years ago
14

PLZZZZ NEED ANSWERS ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️​

Chemistry
1 answer:
Wewaii [24]3 years ago
5 0

Answer:

okay so, 20 Ca goes to group 2A and the chemical group family is alkaline earth metal family

54 Xe goes to group 8A the chemical group family is the noble gas family

37 Rb goes to group 1A the chemical group family is alkali metal family

17 Cl goes to group 7A the chemical group family is the halogen family

Explanation:

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This chemical equation represents a chemical reaction. 2HNO3+Na2SO3-2NaNO3+H2O+SO2
muminat

Answer:

D. Na₂SO₃

Explanation:

The given equation is:

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The reaction equation is shown above. In chemical reactions, the left hand side is made up of the reactants and the right hand side is made up of the products.

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3 years ago
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What mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 a of current? ag (aq) e- → ag(s) 19. 6 g 9. 78 g 0. 3
grandymaker [24]

Mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 a of current is 19.55 g

Given, I=8.70A, t=33.5min=33.5*60=2010 sec, m of Ag = 19600g M=107.87 g/mol

From  faradays law we can write q=I*t= 8.70*2010=17487 C.

moles of Ag =17487/ 19600=0.1812 moles

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<h3>Silver </h3>

Having the atomic number 47 and the Latin word argentum, which means "bright" or "white," silver is a chemical element. Its symbol is Ag. The highest electrical, thermal, and reflectivity of any metal are displayed by this transition metal, which is soft, white, and lustrous. The metal can be found in the Earth's crust in three different forms: as an alloy with other metals like gold and in minerals like argentite and chlorargyrite. It can also be found in its pure, free elemental form, also known as "native silver." During the refining of copper, gold, lead, and zinc, the majority of silver is created as a byproduct. As a valuable metal, silver has long been treasured.

What mass of silver can be plated onto an object in 33. 5 minutes at 8. 70 a of current? ag (aq) e- → ag(s) 19. 6 g 9. 78 g 0. 326 g 3. 07 g 0. 102 g

Learn more about Silver here:

brainly.com/question/14587716

#SPJ4

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Answer:

When light hits CRY2, it changes shape and binds to its natural partner protein, known as CIB1. When light shines on the cells, the CRY2 protein binds to CIB1, which is floating in the cell. CIB1 brings along a gene activator, which initiates transcription, or the copying of DNA into mRNA.

Explanation:

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What information is needed to determine a molecular formula
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Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.

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