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
omeli [17]
3 years ago
12

Chemistry an atom of strontium has at least four different isotopes. what is different between an isotope of 86sr and an isotope

of 87sr? answers
Chemistry
1 answer:
lions [1.4K]3 years ago
5 0
Isotopes are atoms of the same element that differ in the number of neutrons.

Remember that all the atoms of an element have the same number of protons. So the only difference between isotopes of an element is the number of neutrons.

86 Sr means that the mass number of this isotope is 86. Also, remember that the mass number is the number of protons plus the number of neutrons.

87 Sr means that the mass number of this isotope is 87.

So, 86 Sr and 87 Sr differ 1 neutron.

Answer: 1 neutron


You might be interested in
Magnesium hydroxide is only very slightly soluble in water. The reaction by which it goes into solution is: Mg(OH) 2 (s) rightle
prohojiy [21]

Answer:

there will a definite decrease in solute solution

Explanation:

acid reaction acting upon negative charge.

3 0
3 years ago
What is the solution to the problem to the correct number of significant figures (102,900/12)+(170•1.27)
GarryVolchara [31]

As per as the Multiplication rules of the significant figures, whenever any numbers in the decimals forms are multiplied or divided then result in mentioned in such a way so that the significant figures after the decimal will be same as that in the given least condition.


_______________________________


102900/12 = 8575


170 × 1.27 = 215.9


∴ (102,900 ÷ 12) + (170 × 1.27) =  8575 + 215.9


= 8790.9


Now, As per as Above rules, answer in correct significant figures will be = 8791.



8 0
3 years ago
Consider the following reaction: 3Fe(s) + 4H₂O(g) ➞ Fe₃O₄(s) + 4H₂(g). To answer the following question: "How many moles of hot
UkoKoshka [18]
X moles of hot water vapor(H2O) * 1 mol Fe3O4 / 4 mol H2O * 233.55g Fe3O4 / 1 mol = 275 g

Solve the equation

x = 4.71 mol of hot water vapor (steam)

Can you mark me as brainliest?
7 0
3 years ago
Atom A has five protons, four neutrons, and five electrons. Atom
Anna35 [415]

Answer:

they are the same element because they have the same number of protons and electrons,but a different number of neutrons

6 0
3 years ago
33.23 grams of a thin sheet of iron is completely oxidized in 7 days. How would you express the rate of conversion of the silver
tresset_1 [31]

Answer:

A. 0.0440 moles/day

Explanation:

First, let's figure out how many moles 33.23 grams of silver is. We do this by dividing the number of grams by the molar mass of silver, which is 107.87 g/mol:

33.23 g Ag ÷ 107.87 g/mol = 0.3081 mol Ag

Now, let's divide this by 7 to get the rate per day:

0.3081 mol Ag ÷ 7 days = 0.0440 mol/day

Thus, the answer is A.

7 0
3 years ago
Other questions:
  • the legs of a right triangle have lengths of 27 meters and 36 meters. the hypotenuse has a length of 5x meters what is the value
    13·1 answer
  • A reaction progress curve has three peaks and two valleys between the peaks. this curve describes a reaction mechanism that invo
    7·1 answer
  • Hydrogen atoms and helium atoms are not the same.<br> True<br> False
    9·2 answers
  • PLEASE HELP ME!!
    6·2 answers
  • What new characteristic did John Dalton add to the model of the atom?
    6·2 answers
  • Cuales son los cambios que siempre envuelven cambios en la compocision de la sustancia?
    15·1 answer
  • What did Asoka do for convicted murderers?
    12·1 answer
  • In which stage do cells spend most of their time?<br> Interphase
    8·2 answers
  • What is the hydroxide [OH-] concentration of a solution that has a pOH of 4.90? 14 14 1.26 x10-5 1.26 x10, -5 9.1 9.1 7.94 x 104
    9·1 answer
  • Please help....thank you
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!