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
Andru [333]
3 years ago
6

If calcium has two valence electrons and fluorine has seven, how many fluorine atoms are needed to form an ionic bond with calci

um
Chemistry
2 answers:
Brut [27]3 years ago
8 0
There are 7 i just took the test
MaRussiya [10]3 years ago
5 0
Fluorine needs one electron to fill its orbital shell. It needs 8 valence electrons
You might be interested in
The substance gray tin is found to crystallize in a cubic lattice, with an edge length of 646.0 pm. if the density of solid gray
saveliy_v [14]

First find the volume of the cubic lattice given edge length of 646 pm or 6.46x10^-8 cm.

volume = (6.46x10^-8 cm)^3

volume = 2.7x10^-22 cm^3

 

The total mass of the lattice is:

mass = (5.850 g/cm^3) * 2.7x10^-22 cm^3

mass = 1.577x10^-21 grams

 

The molar mass of tin is 118.71 g/mol and the Avogadros number is 6.022 x 10^23 atoms/mol, hence:

 

Sn atoms = [1.577x10^-21 g / (118.71 g/mol)] * 6.022 x 10^23 atoms/mol

Sn atoms = 8 atoms

8 0
3 years ago
The specific heat of water is 4.184 J/g˚C How much heat energy is absorbed when 88.0 g of water is heated from 5.8 C to 35 C? (H
konstantin123 [22]

Answer:

The heat absorbed is hence 10.751.21 J

Explanation:

The heat absorbed when 88g of water is heated from 5.8°C to 35 °C is;

Heat = m c ΔT

m = 88.0 g

c = specific heat of water = 4.184 J/g°C

ΔT = ( change in temperature) = ( 35 - 5.8)°C = 29.2°C

Equating these values into the formula, we obtain;

Heat = 88* 4.184 * 29.2

Heat = 10 751.2064 J

Heat = 10 751.21 J (2 d.p)

The heat absorbed is hence 10.751.21 J

6 0
3 years ago
How is energy transferred and transformed
Oksana_A [137]

Answer:

Energy transfer takes place when energy moves from one place to another. … When energy in a battery is used to power an electronic device, chemical energy is transformed into electrical energy, which moves along wires. Three more ways energy can be transferred are through light, sound, and heat.

Explanation:

6 0
2 years ago
PLEASE HELPPPP How would life on earth be different if it axis were not tilted which respect to its orbit
olga2289 [7]
The season would be much shorter
5 0
3 years ago
Read 2 more answers
A sample of Hydrogen gas has a volume of 25.5 liters at a pressure of 15.0 kPa. If the temperature is kept constant and the pres
patriot [66]

Answer:

<h2>7.65 litres </h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we're finding the new volume

V_2 =  \frac{P_1V_1}{P_2}  \\

15 kPa = 15,000 Pa

50 kPa = 50,000 Pa

We have

V_2 =  \frac{15000 \times 25.5}{50000}  =  \frac{382500}{50000}  \\  = 7.65

We have the final answer as

<h3>7.65 litres </h3>

Hope this helps you

5 0
3 years ago
Other questions:
  • By heating a liquid and measuring the temperature at which it boils, what is being measured?
    9·1 answer
  • Which of the following statements is FALSE?
    14·2 answers
  • Which combination of ion charge and ion size produces the greatest lattice enthalpy?
    15·1 answer
  • If 25 ml of 1.50M LiOH are neutralized by 15ml of nitric acid what is the molarity of HNO3
    15·2 answers
  • Check all that apply to KCI.
    12·1 answer
  • The
    12·1 answer
  • Which organ system coordinates the action of the body
    14·1 answer
  • For this question, you will need to submit a picture of your work in order to receive credit for the proper calculation.
    15·2 answers
  • What is different about the position of that letter if an acid starts with a C?
    12·1 answer
  • A chemical reaction done at STP conditions is supposed to produce 0.011 moles of CO2 gas. How many liters of gas will that be?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!