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Lunna [17]
2 years ago
7

. If the half-life of cesium-133 is 30 years, how much of a 600g sample of cesium-133 will be left after

Chemistry
1 answer:
e-lub [12.9K]2 years ago
3 0

Answer:

Caesium (55Cs) has 40 known isotopes, making it, along with barium and mercury, one of the elements with the most isotopes. The atomic masses of these isotopes range from 112 to 151. Only one isotope, 133Cs, is stable. The longest-lived radioisotopes are 135Cs with a half-life of 2.3 million years, ... It constitutes most of the radioactivity still left from the Chernobyl accident ...

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The decomposition of carbon disulfide to carbon monosulfide and sulfur is first order with k=2.8 ×10^-7 at 1000°C .What is the h
RoseWind [281]

Answer:

2.5×10⁶ s

Explanation:

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

Rate constant (K) = 2.8×10¯⁷ s¯¹

Half-life (t½) =?

The half-life of a first order reaction is given by:

Half-life (t½) = 0.693 / Rate constant (K)

t½ = 0.693 / K

With the above formula, we can obtain the half-life of the reaction as follow:

Rate constant (K) = 2.8×10¯⁷ s¯¹

Half-life (t½) =?

t½ = 0.693 / K

t½ = 0.693 / 2.8×10¯⁷

t½ = 2.5×10⁶ s

Therefore, the half-life of the reaction is 2.5×10⁶ s

6 0
2 years ago
When ironing clothes the primary method of heat transfers conduction convection insulation or radiation
postnew [5]
Convection insulation
7 0
2 years ago
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poizon [28]

Answer:

Explanation:

A chemical formula can be defined as a notation that is used to show which element and how many is contained in a chemical compound.

Also, in chemistry, the sum of charges of the anion and the cation of any ionic compound is always equal to zero.

A chemical equation is considered to be balanced when the amount of reactants on the left is equal to the amount of products on the right.

Therefore;

[2]FeBr3 + [3]Na2S → [1]Fe2S3 + [6]NaBr

In the above chemical equation, we will balance the reactants in the chemical equation with the smallest coefficients possible;

2FeBr_{3} + 3Na_{3}S ----> Fe_{2}S{3} + 6NaBr

Two (2) moles of Iron (III) Bromide reacts with two (2) moles of Sodium Sulfide to form Iron (III) Sulfide and Sodium Bromide.

4 0
2 years ago
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Mashcka [7]

Answer:

1. E. mitochondrion

2. C. chloroplasts

3. G. vacuole

4. A. cell membrane

5. B. cell wall

6. D.cytoplasm

7. F. Nucleus

8. cytoplasm

9. cell membrane

10. chloroplast

11. mitochondrion

12. nucleus

13. cell wall

14. vacuole

Explanation:

- Be familiar which each term.

- Look up diagram to understand image.

- Hope that helped! Please let me know if you need further explanation on each word.

4 0
3 years ago
HS0, + NaOH
tatyana61 [14]

Answer: Synthesis

Explanation: I think is suynthesis

7 0
3 years ago
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