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
Kay [80]
3 years ago
9

An element has an atmomic number of 68. The number of protons and electron in a neutral atom of the element are?

Chemistry
1 answer:
Bess [88]3 years ago
8 0

Answer:

Explanation:

An element whose atomic number is 68 (number Z), has 68 electrons and 68 protons. According to the periodic table it corresponds to the element Erbium (Er), whose mass number (A) is 167. The number of neutrons is 167-68 = 99.

You might be interested in
An ______ cannot be broken down into any other substance
QveST [7]

Answer:

an atom cannot be broken down

6 0
2 years ago
Read 2 more answers
Can u help me out its <br>a quick question<br>​
tia_tia [17]

The second one is the way to go.

5 0
3 years ago
How many grams of H2O can be made from the combustion of 3.75 liters of C7H14 and an excess of O2 at STP?
Kitty [74]

Answer:

21.10g of H2O

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

2C7H14 + 21O2 —> 14CO2 + 14H2O

From the balanced equation above, 2L of C7H14 produced 14L of H2O.

Therefore, 3.75L of C7H14 will produce = (3.75 x 14)/2 = 26.25L of H2O.

Next, we shall determine the number of mole of H2O that will occupy 26.25L at stp. This is illustrated below:

1 mole of a gas occupy 22.4L at stp

Therefore, Xmol of H2O will occupy

26.25L i.e

Xmol of H2O = 26.25/22.4

Xmol of H2O = 1.172 mole

Therefore, 1.172 mole of H2O is produced from the reaction.

Next, we shall convert 1.172 mole of H2O to grams. This is illustrated below:

Number of mole H2O = 1.172 mole

Molar mass of H2O = (2x1) + 16 = 18g/mol

Mass of H2O =..?

Mass = mole x molar mass

Mass of H2O = 1.172 x 18

Mass of H2O = 21.10g

Therefore, 21.10g of H2O is produced from the reaction.

3 0
3 years ago
The formula HCl stands for ____.
serious [3.7K]
HCl :

hydrochloric acid

answer A

hope this helps!
7 0
2 years ago
What is the mass of 1.7 × 1023 atoms of zinc
fiasKO [112]

We are given with a compound, Zinc (Zn) having a 1.7 x 10 ^23 atoms. We are tasked to solve for it's corresponding mass in g. We need to find first the molecular weight of Zinc, that is

Zn= 65.38 g/mol

Not that 1 mol=6.022x10^{23} atoms, hence,

1.7 x 10 ^23 atoms x 1 mol/6.022x10^{23} atoms x65.38 g/ 1mol

=18.456 g of Zn

 

Therefore, the mass of Zinc 18.456 g

3 0
2 years ago
Other questions:
  • HEELLP PLEASEE!!! I GIVE 30 POINTTS + MARK BRAINLIEST!!
    11·1 answer
  • Why is second ionization energy larger than first ionization energy
    9·2 answers
  • The United Nations defines sustainable land management (SLM) as "the use of land resources, including soils, water, animals and
    6·2 answers
  • Quien quiere ser mi amigo
    13·1 answer
  • In an experiment 25.0 mL of 0.100 M KI was diluted to 50.0 mL. Calculate the molarity of the diluted solution
    5·1 answer
  • Convert solar day into mintues​
    13·1 answer
  • “Sound plays an important role in our lives”. Give two points in support of this statement.
    15·2 answers
  • Hi......................... HELLO
    14·2 answers
  • When a certain isotope, such as Pa-231, is hit by a neutron, it will always split into the same smaller nuclei.
    12·1 answer
  • Which statement explains why H2O has a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!