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3 years ago

What are the symbols of the two elements which are liquid

Chemistry

2 answers:

galina1969 [7]3 years ago

8 0

I think it would be Bromine and Mercury, hope that helps

Dominik [7]3 years ago

5 0

Hi.

What are the symbols of the two elements which are liquid.

Bromine and Mercury is your answer.

Bromine (symbol Br and atomic number 35) and mercury (symbol Hg and atomic number 80) are both liquids at room temperature. Bromine is a reddish-brown liquid, with a melting point of 265.9 K. Mercury is a toxic shiny silvery metal, with a melting point of 234.32

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Which of the following is not an element that makes up all living organisms?

Bess [88]

Answer: Rubidium is correct

Explanation: The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Atoms of these elements combine and form thousands of large molecules. These large molecules make up the structures of cells and carry out many processes essential to life.

8 0

3 years ago

The density of benzene at 15 ∘C∘C is 0.8787 g/mL. Calculate the mass of 0.1700 LL of benzene at this temperature. Express your a

SVETLANKA909090 [29]

Answer:

Mass of benzene is: 149.3 g

Explanation:

Let's use density to calculate mass.

Density = Mass / Volume

Mass = Density . volume

Be careful, because density is in g/mL and the volume is in L. So let's convert the L to mL: 0.170 L . 1000 mL / 1L = 170 mL

0.8787 g/mL . 170 mL = Mass of benzene

Mass of benzene is: 149.3 g

5 0

3 years ago

A 100. mL volume of 0.800 M calcium chloride is mixed with 400. mL of water to make 500. mL of solution. What is the final molar

strojnjashka [21]

Answer:

0.99mol/L

Explanation:

Molarity ( M) = # of moles of solute / volume of solution (L)

Volume of Solution = 100 mL or 0.1 L

Molarity ( M) = # of moles of solute / volume of solution (L)

Molarity (M) = 0.099 mol / 0.1 L = 0.99mol/ L

3 0

3 years ago

Help me please!!!!!!!!

alekssr [168]

Answer:

The element is CARBON

The number 6 refers to the ATOMIC NUMBER

the numbers 12, 13, and 14 refer to the ATOMIC MASS

how many protons and neutrons are in the first isotope?

6. 6

how many protons and neutrons are in the second isotope?

6. 7

how many protons and neutrons are in the third isotope?

6. 8

you are welcome :)

8 0

3 years ago

A small amount of a solid is added to water. The observation made after fifteen minutes is shown in the figure. Which of these s

natulia [17]

Answer:

B) sand

Explanation:

A) Oil is a wrong choice because it is a liquid not a solid and also if it is oil, it will float over the water surface as a droplets.

B) Sand is the right choice, because sand is a solid and it does not dissolve in water and stabilizes at the bottom.

C) Sugar is a wrong choice, because small amount of sugar will dissolve in water and be a homogeneous solution and does not appear as a particles.

D) Wood ships is also a wrong choice, even it is a solid and does not dissolve in water, but it will float over the water surface.

4 0

3 years ago