1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Digiron [165]
3 years ago
9

Which of the following statements is true?

Chemistry
2 answers:
ivann1987 [24]3 years ago
7 0

Answer:

U-235 is an isotope of uranium

Explanation:

The most stable form of uranium isotopes is 235. (0.7198–0.7202%)

Citrus2011 [14]3 years ago
6 0

<u>Answer:</u>

U-235 is a isotope of Uranium

<u>Explanation:</u>

We know, Uranium is naturally occurring element that has radioactive nature and has no stable isotope. Uranium is made up of 3 major isotopes Which are U-238 found in 99.27–99.27% natural abundance, U-235 found in 0.72% and U-234 found in 0.0051% abundance.

The list of isotopes is Uranium-233, Uranium-234 and Uranium-235. Hence, U-235 is a isotope of Uranium is the correct statement.

You might be interested in
Identify the element that has 23 protons
barxatty [35]

Answer:

Vanadium

Explanation:

3 0
2 years ago
Read 2 more answers
Suppose a student started with 142.0 mg of trans-cinnamic acid, 412 mg of pyridinium tribromide, and 2.30 mL of glacial acetic a
nirvana33 [79]

Answer: Theoretical Yield = 0.2952 g

               Percentage Yield = 75.3%

Explanation:

Calculation of limiting reactant:

n-trans-cinnamic acid moles = (142mg/1000) / 148.16 = 9.584*10⁻⁴ mol

pyridium tribromide moles = (412mg/1000) / 319.82= 1.288*10⁻³ mol

  • n-trans-cinnamic acid is the limiting reactant

The molar ratio according to the equation mentioned is equals to 1:1

The brominated product moles is also = 9.584*10⁻⁴ mol

Theoretical yield = (9.584*10⁻⁴ mol) * (Mr of brominated product)

                             =  (9.584*10⁻⁴ mol) * (307.97) = 0.2952 g

Percentage Yield is : Actual Yield / Theoretical Yield = 0.2223/0.2952

                                                                                           = 75.3%

4 0
3 years ago
4Fe + 3O2 → 2Fe2O3
Black_prince [1.1K]

n(2Fe2O3)=10g/319.374amu=0.03mol

n(4Fe+3O2)=0.03 mol

m(4Fe+2O2)=Mn=319.374×0.03=9.58=10

7 0
3 years ago
Read 2 more answers
A 35 MGD surface Water treatement plant proposes to to use alum Coagulation for turbidity reduction using 44 mg/ L alum. the raw
CaHeK987 [17]
C) is the water alkainty adequate. I.e
5 0
3 years ago
Which of the following statements is a qualitative observation? A.The branch is three meters long. B.The substance tastes bitter
notka56 [123]

There are two kinds of analysis: qualitative and quantitative

In quantitative we analyse the amount of something that is how much of something is present / the quantity. Ex: the length of branch of tree, number of students in class, volume of a liquid in a beaker.

In qualitative analysis we determine the kind of substance / quality of substance / nature of substance.

like: colour of a substance, odor of a substance or taste (bitter / sour / sweet etc) of a substance

So answer is : B.The substance tastes bitter

7 0
3 years ago
Other questions:
  • An 100g box have a temperature of 22 C. What temperature must a 200g box be kept at in order for both to have the same amount of
    6·1 answer
  • Which is true about a chemical reaction
    7·2 answers
  • Energy transfer by convection is usually restricted to what type of substance?
    15·1 answer
  • A first place finisher in a cross country meet ran 5,000 meters in 871.7 seconds. What was his average speed?​
    15·1 answer
  • When was the idea of an atom first developed? Describe this theory.
    13·1 answer
  • In a chemical reaction, 300 grams of reactant A are combined with 100 grams of reactant B. Both A and 
    15·1 answer
  • How many moles of Al are necessary to form 45.0 g of AlBr, from this
    15·1 answer
  • What is the molarity of a solution of KNO3 (molecular mass = 101) that contains 404 grams of KNO3 in 2.00 liters of solution? A.
    8·1 answer
  • 2A(g) + B(l) ⇌ 3C(aq) + D(s)
    12·1 answer
  • The element that has a valence configuration of 5s2 is<br> Ba<br> Ca<br> Be<br> Sr<br> Mg
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!