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2 years ago

How are communication signals on the ground sent to spacecraft?

Chemistry

1 answer:

gogolik [260]2 years ago

3 0

Answer:

d) the signals must be changed to another form at ground stations to travel through space.

Explanation:

Spacecraft use transmitters to communicate with people on Earth. This are sent in the form of signals.

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What is the percent by mass of oxygen in fe2o3

Effectus [21]

To get the formula mass we have to add the atomic mass of each atom
(55.847 x 2) + ( 16 x 3) = 160
this means that 16 x 3 = 48 are the grams of O
% = 48 x 100 / 160 =30 %

hope this helped mark me brainliest

5 0

3 years ago

Read 2 more answers

An atom has the following electron configuration.

vagabundo [1.1K]

<u>Answer:</u> The number of valence electron in the given atom are 5

<u>Explanation:</u>

Valence electrons are defined as the electrons which are present in the outermost shell of an atom. Outermost shell has the highest value of 'n' that is principal quantum number.

For the given electronic configuration: $1s^22s^22p^63s^23p^64s^23d^3$

When an element belongs to d-block, the number of valence electrons are present in $ns,np\text{ and }(n-1)d$ orbitals

Here, n = 4

The electrons in '4s' orbital = 2

The electrons in '3d' orbital = 3

Number of valence electrons = 2 + 3 = 5

Hence, the number of valence electron in the given atom are 5

8 0

3 years ago

Read 2 more answers

Can u fill in the blanks

natulia [17]

1. Particles in gas can MOVE AROUND QUICKLY
2. When you remove energy from particles they move SLOWER and the matter CONTRASTS

3 0

3 years ago

How many single covalent bonds in urea?

Mkey [24]

In urea, each nitrogen atom uses three of its valence electrons for formation of single bonds with carbon atom and two hydrogen atoms.

3 0

3 years ago

Complete the sentence with the word "element" or "compound. O is a(n)_______ and H2O, is a(n)____

nikdorinn [45]

Answer:

Element; compound

Explanation:

Oxygen is an element on the periodic table, but when it's combined with the element Hydrogen, it produces water, which is a compound (H2O). When two elements combine, it produces a compound.

I hope this helps! :)

8 0

3 years ago