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
e-lub [12.9K]
3 years ago
8

Help me please thank you

Chemistry
1 answer:
Damm [24]3 years ago
5 0
The atomic number is equal to proton number : 30
You might be interested in
What are four everyday items that rely on the behavior of gases to operate properly?
Artist 52 [7]
A stove needs gas to burn (I only have one off the top of my head, sorry :/)
6 0
3 years ago
How many particles are in on mole?
shusha [124]

The answer is 1023 particles

6 0
3 years ago
Un anillo, de masa 90 gramos, contiene 59,1% de oro. ¿Cuál es el valor del anillo si cada mol de oro vale S/.1800?. Considere el
LekaFEV [45]

Answer:

S/.486 es el valor del anillo

Explanation:

Para hallar el precio del anillo se deben encontrar las moles de oro que contiene este.

Si el anillo es de 90g y solo el 59.1% contiene oro, la cantidad de oro en gramos es:

90g × 59.1% = 53.19g Oro en el anillo

Ahora, para convertir los gramos de oro a moles se debe usar la masa atómica del oro (197g/mol), así:

53.19g × (1mol / 197g) = <em><u>0.27 moles de oro contiene el anillo</u></em>.

Ya que cada mol de oro cuesta S/.1800, 0.27 moles de oro (Y por lo tanto, el anillo) costarán:

0.27mol × (S/.1800 / 1mol oro) =

<h3>S/.486 es el valor del anillo</h3>
8 0
3 years ago
. Which of the following do low pressures not produce?
aleksley [76]

Answer:

the question is incomplete

3 0
3 years ago
7.26 of a hydrate, Cu(NO3)2.xH2O, formed 2.4 g copper(II) oxide.
goldfiish [28.3K]

Number of moles= mass/ molar mass

Or n=m/MM

n = number of moles

m = mass

MM = molar mass

1) n CuO = 2.4g / 79.54g/mol = 0.03 mol CuO

2) n Cu(NO3)2.xH2O = 7.26 g / 205.6 = 0.035 moles of Cu(NO3)2.xH2O

3) 205.6 g

Cu = 63.5 g

N = 14g

O =16g

H= 1 g

63.5+ (14+(16*3))*2+1*2+16 =205.6 g

4) yes is 188g

5) I don’t know, I assume was 1

6 0
3 years ago
Read 2 more answers
Other questions:
  • What food would glucose be in
    13·2 answers
  • How and why theories change and how this contributes to continues and ongoing nature of science
    8·1 answer
  • Select the pair that has the larger atom or ion listed first.
    10·1 answer
  • HELP URGENT!
    12·2 answers
  • List 4 significant problems with nuclear power plants.xx
    15·1 answer
  • 5. Geothermal energy
    9·2 answers
  • What is the molecular weight (rmm) of NaOH?<br> 40<br> 20<br> 50<br> 60
    8·1 answer
  • How many grams are in 1,000 Lutheran of C2H4
    10·1 answer
  • How long is a grain of rice? Select the best estimate.
    11·1 answer
  • A reaction that had two compounds as reactants and two compounds as products is most likely a
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!