A red shift in the spectrum of the light from an object indicates the object is moving ____ you.

Answer: The mass of ammonia is 5.236 g and that of sulfuric acid is 15.064 g

Explanation:

• Calculating the mass of ammonia:

To calculate the number of moles, we use the equation:

     .....(1)

Given mass of ammonium sulfate = 20.3 g

Molar mass of ammonium sulfate = 132.14 g/mol

Putting values in equation 1, we get:

The chemical equation for the reaction of ammonia and sulfuric acid follows:

As, sulfuric acid remains unreacted, which means it is an excess reagent and its starting mass cannot be determined from ammonium sulfate.

By Stoichiometry of the reaction:

1 mole of ammonium sulfate is produced by 2 moles of ammonia.

So, 0.154 moles of ammonium sulfate is produced by = of ammonia.

Now, calculating the mass of ammonia from equation 1, we get:

Molar mass of ammonia = 17 g/mol

Moles of ammonia = 0.308 moles

Putting values in equation 1, we get:

• Calculating the mass of sulfuric acid

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.  

This also means that total mass on the reactant side must be equal to the total mass on the product side.

Let the mass of sulfuric acid be 'x' grams

We are given:

Mass of ammonium sulfate = 20.3 grams

Mass of ammonia = 5.236 grams

Total mass on reactant side = 5.236 + x

Total mass on product side = 20.3 g

So, by applying law of conservation of mass, we get:

Hence, the mass of ammonia is 5.236 g and that of sulfuric acid is 15.064 g

Answer:

The correct answer is option d: bacteria

Explanation:

Hello! Let's solve this!

Abiotic components are those that have no life and biotics are the factors that have life.

Let's see each option!

Nutrients: they have no life, they can be calcium, protasium, vitamins

sunlight: it has no life, it comes from the sun

rain: it has no life, it is condensed water and it falls to the earth in the form of drops

bacteria: they have life, they are cells so they are living beings.

We conclude that the correct answer is option d: bacteria

 The element  that is most  likely  to form covalent  bonds  with  carbon (C)  is

Selenium  (Se)

Explanation

Covalent  bond is  formed   when  there is sharing of electrons among  two   or more non metals.

Both carbon  and selenium are non metals  therefore they  react to form  a covalent  bond  by sharing electron.

 Despite  krypton been a non metal  it does  not form a covalent  bond with carbon since krypton is  inert ( non reactive).

Beryllium (Be)  and  sodium (Na) are  metals therefore  they form  ionic bond with  carbon instead  of covalent  bond.

Answer: Option (c) is the correct answer.

Explanation:

Atomic number of carbon is 6 and its electronic configuration is 2, 4. So, in order to complete its octet, it requires 4 more electrons.

Therefore, carbon form covalent bonds, that is, it shares electrons with and electron deficient atom.

Krypton is a noble gas and has completely filled octet. So, it will neither give to share its electrons with carbon atom.

Whereas beryllium and sodium does not have enough valence electrons to share. Hence, they will not form bond with carbon atom.

On the other hand, selenium being a non-metal is electron deficient and therefore, in order to complete its octet it will share its electrons with carbon atom.

Thus, we can conclude that the element carbon (C) is most likely to form covalent bonds with the element selenium (Se).