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
V125BC [204]
3 years ago
11

When electrons are removed from the outermost shell of a calcium atom becomes

Chemistry
1 answer:
Maslowich3 years ago
7 0
When electrons are removed from the outermost shell of calcium atom, its atom becomes positively charged, with a charge of plus one.

When an electron is added to an atom, the atom becomes negatively charged, with a charge of minus one.

When these atoms become positively or negatively charged, they are known as ions. Positively charged ions are called cations and negatively charged ions are called anions.

Calcium is identified as one of the cations because it is positively charged when its electrons are removed from its outermost shell.
You might be interested in
A mixture of oxygen hydrogen and nitrogen gas is exerts a total pressure of 282K PA if the partial pressures of oxygen and hydro
sergiy2304 [10]
Glgggggggggggggggggggggggg
7 0
4 years ago
Read 2 more answers
All organic compounds contain ______, hydrogen, and usually oxygen. nitrogen. phosphorus. sulfur carbon.
Murrr4er [49]
Carbon is the answer. all hydrocarbures have to contain carbon.
4 0
3 years ago
Formation of water: 2H2 + 1 O2 --> 2H20
VLD [36.1K]

Answer:

n=15 moles H2O

1:2

x:15

x=7.5 moles of O2

3 0
3 years ago
What volume, in L, of a 6.3 M K2SO4 solution contains 44.1 g of K2SO4?
Alenkinab [10]
Answer:

= 1.60 L

Comment if you need step to step explanation.
8 0
3 years ago
rate of a certain reaction is given by the following rate law: rate Use this information to answer the questions below. What is
Sunny_sXe [5.5K]

Complete Question

The  rate of a certain reaction is given by the following rate law:

            rate =  k [H_2][I_2]

rate Use this information to answer the questions below.

What is the reaction order in H_2?

What is the reaction order in I_2?

What is overall reaction order?

At a certain concentration of H2 and I2, the initial rate of reaction is 2.0 x 104 M / s. What would the initial rate of the reaction be if the concentration of H2 were doubled? Round your answer to significant digits. The rate of the reaction is measured to be 52.0 M / s when [H2] = 1.8 M and [I2] = 0.82 M. Calculate the value of the rate constant. Round your answer to significant digits.

Answer:

The reaction order in H_2 is  n =  1

The reaction order in I_2 is  m = 1

The  overall reaction order z =  2

When the hydrogen is double the the initial rate is   rate_n  =  4.0*10^{-4} M/s

The rate constant is   k = 35.23 \  M^{-1} s^{-1}

Explanation:

From the question we are told that

   The rate law is  rate =  k [H_2][I_2]

   The rate of reaction is rate =  2.0 *10^{4} M /s

Let the reaction order for H_2 be  n and for I_2  be  m

From the given rate law the concentration of H_2 is raised to the power of 1 and this is same with I_2 so their reaction order is  n=m=1

   The overall reaction order is  

               z  = n +m

               z  =1 +1

               z  =2

At  rate =  2.0 *10^{4} M /s

        2.0*10^{4}  = k  [H_2] [I_2] ---(1)

= >    k  = \frac{2.0*10^{4}}{[H_2] [I_2]  }

given that the concentration of hydrogen is doubled we have that

            rate  = k [2H_2] [I_2] ----(2)

=>      k = \frac{rate_n  }{ [2H_2] [I_2]}

 So equating the two k

           \frac{2.0*10^{4}}{[H_2] [I_2]  } = \frac{rate_n  }{ [2H_2] [I_2]}

    =>    rate_n  =  4.0*10^{-4} M/s

So when

      rate_x =  52.0 M/s

        [H_2] = 1.8 M

         [I_2] =  0.82 \ M

We have

      52 .0 =  k(1.8)* (0.82)

     k = \frac{52 .0}{(1.8)* (0.82)}

      k = 35.23 M^{-2} s^{-1}

     

     

3 0
3 years ago
Other questions:
  • Instrumental methods need only a microscopic sample to return an accurate result. Why is this so?
    7·1 answer
  • 11. What is another name for the transition metals? Group B elements noble gases Group A elements Group C elements
    15·1 answer
  • Do bromide ions accept or donate an electron in redox reactions? how do you know?​
    10·1 answer
  • A student has a 2.19 L bottle that contains a mixture of O 2 , N 2 , and CO 2 with a total pressure of 5.57 bar at 298 K . She k
    10·1 answer
  • Suppose that you have a 60 0% solution of NaOH. How many millions of water must be added to 300 ml of this solution to prepare a
    6·1 answer
  • How many grams of NaCl (molecular weight = 58 Da) would you have to dissolve in 50ml to make a 2M stock solution? Answer:
    10·1 answer
  • Dichloromethane contains strong carbon - hydrogen and carbon- chlorine bonds. Despite the presence of these strong bonds. dichlo
    11·1 answer
  • Carbon-14 and carbon-12 have the same number of protons but a different number of neutrons. These different forms of the same el
    7·2 answers
  • Read the statement about Mount Vesuvius. Mount Vesuvius erupted in 79 CE and destroyed the ancient city of Pompeii. Why is the s
    12·1 answer
  • What branch of chemistry studies the flow of electrons?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!