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Zigmanuir [339]
3 years ago
11

When uranium-238 is transformed into thorium-234, it is represented by a balanced equation. What is missing from the equation of

U-238 undergoing radioactive decay?
Chemistry
1 answer:
Mandarinka [93]3 years ago
8 0

The unstable atomic nucleus of Uranium-238 emits ionizing particles and loses energy in order to achieve a stable state. This process is called the Radioactive decay. This isotope undergoes Alpha decay by emitting Alpha rays. It has a decay energy of 4.267 MeV.

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Which of the following substances is NOT an acid? 25 POINTS!!!!!
melomori [17]

Answer:

1:is option A as it have OH- group (base)

2:a),antacid as it's weak base

4 0
3 years ago
What are the products of the following neutralization reaction (No need to balance)
Nina [5.8K]

HCI + NaOH --> NaCl + H2O

Neutralization reaction is the reaction between acid and base which results in formation of salt and water. Here salt is NaCl (common salt) in above reaction.

SO, (A) H20 + NaCl is your answer.

8 0
3 years ago
How many moles of methane are in 7.31*10^25 molecules?
GrogVix [38]
<h3>Answer:</h3>

121 mol CH₄

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Organic</u>

  • Writing chemical compounds
  • Writing organic structures
  • Prefixes
  • Alkanes, Alkenes, Alkynes

<u>Atomic Structure</u>

  • Using Dimensional Analysis
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<h3>Explanation:</h3>

<u>Step 1: Define</u>

7.31 × 10²⁵ molecules CH₄

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

<u />\displaystyle 7.31 \cdot 10^{25} \ molecules \ CH_4(\frac{1 \ mol \ CH_4}{6.022 \cdot 10^{23} \ molecules \ CH_4} ) = 121.388 \ mol \ CH_4<u />

<u />

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

121.388 mol CH₄ ≈ 121 mol CH₄

7 0
3 years ago
All of space and the matter in it is ?
Romashka-Z-Leto [24]
If this is for chemistry then it's "made up of atoms."
4 0
3 years ago
The Group 8A(18) elements The Group 8A(18) elements are unreactive and are rarely found in combination with other elements. are
valentina_108 [34]

Answer: Option (a) is the correct answer.

Explanation:

It is known that elements which have completely filled octet when they are present in neutral state then they do not need to gain or lose an electron. Hence, the element becomes unreactive in nature.

For example, neon is a noble gas whose atomic number is 10 and its electronic distribution is 2, 8. As they have completely filled orbitals so they do not react with other elements.

As a result, they are rarely found in combination with other elements.

Thus, we can conclude that the Group 8A(18) elements are unreactive and are rarely found in combination with other elements.

5 0
3 years ago
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