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natita [175]
2 years ago
12

Elements are placed in the same column of the periodic table because they share the same number of valance electrons. Please sel

ect the best answer from the choices provided T F
Chemistry
2 answers:
salantis [7]2 years ago
7 0
I believe that is true
Elis [28]2 years ago
7 0

Answer:

True

Explanation:

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Mention 10 products made from crude oil​
garri49 [273]

Answer:

"After crude oil is removed from the ground, it is sent to a refinery where different parts of the crude oil are separated into useable petroleum products. These petroleum products include gasoline, distillates such as diesel fuel and heating oil, jet fuel, petrochemical feedstocks, waxes, lubricating oils, and asphalt.

A U.S 42-gallon barrel of crude oil yields about 45 gallons of petroleum products in U.S. refineries because of refinery processing gain. This increase in volume is similar to what happens to popcorn when it is popped."

"What are petroleum products, and what is petroleum used for?

Petroleum products include transportation fuels, fuel oils for heating and electricity generation, asphalt and road oil, and feedstocks for making the chemicals, plastics, and synthetic materials that are in nearly everything we use. Of the approximately 7.21 billion barrels of total U.S. petroleum consumption in 2016, 47% was motor gasoline (includes ethanol), 20% was distillate fuel (heating oil and diesel fuel), and 8% was jet fuel."

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4 0
2 years ago
Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number. Match Term Def
Nataly [62]

 The Match  of element  to  its  name, atomic  mass   is as below


element               symbol              atomic mass  or atomic  number

Antimony                Sb                         51

 sulfur                     S                            32

 Silicon                    Si                           14


<u><em>Explanation</em></u>

 From periodic table Antimony   is a chemical   element with  symbol Sb   and atomic number 51.

 Sulfur  on the  other hand  is a  chemical  element  with  symbol  S  and  has  a atomic  mass  of 32


silicon  is an element  with symbol Si    and  atomic number 14

5 0
3 years ago
Read 2 more answers
The mass of 322 mL of hydrogen gas at 4.0 atm and –73°C is 1.21 grams. What is the density of hydrogen gas at STP?
Andrews [41]
To be able to answer this item, we assume that the given hydrogen gas is ideal such that we are able to use the Ideal Gas equation,
                               PV = nRT
At STP, the values of volume, pressure, and temperature are 22.4 L, 1 atm, and 273.15 K. Solving for n,
                              n = (1 atm x 22.4 L) / (0.0821 L.atm/mol K x 273.15 K)
                                                  n = 0.9988 mols
Each mol of hydrogen gas is 2 g.
                                                 m = (0.9988 mols) x (2 g/1 mol)
                                                   m = 1.9977 g
Density is the quotient of mass and volume,
                           density = 1.9977 g/ 22400 mL
                            density = 8.92 x 10^-5 g/mL
7 0
2 years ago
What does subducted mean
vovikov84 [41]
The sideways and downward movement of the edge of a plate of the earths crust into the mantle beneath another plate
4 0
3 years ago
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Your cross country skis are 210 cm long. What is their length in inches?
DedPeter [7]

210 cm converted into inches is 82.67716535 in.

8 0
2 years ago
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