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
miss Akunina [59]
3 years ago
7

PLEASE HELP

Chemistry
2 answers:
Afina-wow [57]3 years ago
8 0

Sample response: Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.

This is late but if anyone needs it here you go.

svp [43]3 years ago
7 0

Because more than one substance was released (following a color change signifying a chemical reaction), the sample was indeed, a compound.
You might be interested in
What happens to the electrons in an ionic bond?
Anton [14]

Answer:

In an ionic bonds, the metal loses electrons to become a positively charged cation, In which the nonmetal accepts those electrons to become a negatively charged anion.

Explanation:

3 0
3 years ago
Read 2 more answers
Which is caused by gravity?
MissTica
Mass wasting I think it's done
5 0
3 years ago
If it requires 18.2 milliliters of 0.45 molar barium hydroxide to neutralize 38.5 milliliters of nitric acid, solve for the mola
Ghella [55]
Hi! :)

Ba(OH)2 + 2 HNO3 → Ba(NO3)2 + 2 H2O

(18.2 mL) x (0.45 M Ba(OH)2) x (2 mol HNO3 / 1 mol Ba(OH)2) / (38.5 mL HNO3) = 0.43 M HNO3
5 0
4 years ago
Read 2 more answers
When the u-235 nucleus is struck with a neutron, the ce-144 and sr-90 nuclei are produced, along with some neutrons and beta par
butalik [34]
Answer: 2 (2 neutrons are produced).

Explanation:

1) In the left side of the transmutation equationa appears:
²³⁵U + ¹n →

I am omitting the atomic number (subscript to the leff) because the question does not show them as it is focused on number of neutrons.


2) The right side of the transmutation equation has:

→ ¹⁴⁴Ce + ⁹⁰Sr + ?

3) The total mass number of the left side is 235 + 1 = 236

4) The total mass number of Ce and Sr on the right side is 144 + 90 = 234

5) Then, you are lacking 236 - 234 = 2 unit masses on the right side which are the 2 neutrons that are produced along with the Ce and Sr.

The complete final equation is:

²³⁵U + ¹n → ¹⁴⁴Ce + ⁹⁰Sr + 2 ¹n

Where you have the two neutrons produced.
6 0
3 years ago
.22
Alja [10]

Answer:its b

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • Number of valence electrons for calcium,carbon,potassium,helium,and argon
    8·2 answers
  • The protein keratin is composed of two helical strands that wrap around each other in what is called a coiled coil. The two stra
    12·1 answer
  • If a 0.75 mole sample of helium gas occupies a volume of 1.5 l, what volume will a 1.2 mole sample of gas occupy at the same tem
    6·1 answer
  • How many secondary (2°) carbons are found in 5-ethyl-3,3,4-trimethylheptane??
    7·2 answers
  • A scientist is observing elephants in Asia. He notices that a specific species of moth lands on the faces of the elephants. On c
    10·2 answers
  • Convert 13,400 m to km.
    8·2 answers
  • The average atomic mass for any element will be closest to the average atomic mass of the ________ isotope.
    12·1 answer
  • The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and in
    14·1 answer
  • When light hits the Earth at a greater angle, what does this cause?​
    13·1 answer
  • If you move at 50 meters in 10 seconds, what is your speed?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!