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lidiya [134]
3 years ago
14

Elements whose names end with âium are usually metals; sodium is one example. Identify a nonmetal whose name also ends with âium

.
Chemistry
1 answer:
Makovka662 [10]3 years ago
8 0

Answer: Helium (He) and Selenium (Se) both are non metals ends with ium sound

Explanation:

He is a inert gas and Se belongs to oxygen family (VI A group)

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Carbon-14 emits beta radiation and decays with a half life of 5730 years. Assume you start with 2.5x10^15 grams of Carbon-14, ho
saveliy_v [14]

The amount remaining at the end of 5 half-lives is 7.81×10¹³ g

From the question given above, the following data were obtained:

  • Half-life (t½) = 5730 years
  • Original amount (N₀) = 2.5×10¹⁵ g
  • Number of half-lives (n) = 5
  • Amount remaining (N) =?

The amount remaining can be obtained as follow:

N = 1/2ⁿ × N₀

N = 1/2⁵ × 2.5×10¹⁵

N = 1/32 × 2.5×10¹⁵

N = 0.03125 × 2.5×10¹⁵

N = 7.81×10¹³ g

Therefore, the amount remaining after 5 half-lives is 7.81×10¹³ g

Learn more about half-life: brainly.com/question/25783920

3 0
2 years ago
Boiling refers to which phase change?
Monica [59]
Boiling or also called evaporation is the conversion of liquid to gas through the application of heat. This phase change is an endothermic change and is the opposite of condensation from gas to liquid.
8 0
3 years ago
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DochEvi [55]
Joshua saw the rising batter form the cake in the oven.

He saw that because of the reaction of baking soda/powder with the liquid in the batter.
4 0
4 years ago
Read 2 more answers
The Hope diamond has a mass of 44.0 carats and a density of 3.51 g/cm3. What is the volume of the Hope diamond? (Hint: 1 carat =
Georgia [21]
Q=44.0 ct
p=3.51 g/cm³
Δq=0.200 g/ct

m=q×Δq

v=m/p=q×Δq/p

v=44.0×0.200/3.51≈2.5 cm³


C.  2.5 cm³
7 0
3 years ago
I need help with the solution
Y_Kistochka [10]

Answer:

1

Explanation:

The empirical formula describes the simplest whole number ratio of each type of atom in a compound. To find this formula, you need to (1) convert grams of each element to moles (via their atomic masses) and then (2) find the ratio of each element (by dividing each molar value by the smallest mole value).

(Step 1)

Atomic Mass (Zn): 65.380 g/mol

Atomic Mass (C): 12.011 g/mol

Atomic Mass (O): 15.998 g/mol

10.40 grams Zn              1 mole
------------------------  x  ------------------------  =  0.159 moles Zn
                                   65.380 grams

   

1.92 grams C               1 mole
---------------------  x  -----------------------  =  0.160 moles C
                                 12.011 grams

7.68 grams O               1 mole
----------------------  x  ------------------------  =  0.480 moles O
                                 15.998 grams

(Step 2)

0.159 moles Zn / 0.159  =  1 atom Zn

0.160 moles C / 0.159  =  1 atom C

0.480 moles O / 0.159  =  3 atom O

The empirical formula is Zn₁C₁O₃. Therefore, the value that should be in the space is 1.

7 0
2 years ago
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