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never [62]
4 years ago
9

Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1. Which of the following would represent an ionic c

ompound composed of Calcium and Iodide ions? Question 3 options: CaI2 CaI Ca2I Ca2I 2CaI CaI2
Chemistry
1 answer:
astra-53 [7]4 years ago
5 0

 The   formula that would represent an ionic  compound  that is composed of calcium and iodide ions  is   CaI2

 Explanation

Ionic compound  CaI₂ is formed  when Calcium form cation ( <em>a positively charged ion</em>) by losing 2 electrons while two iodine atoms form  anion ( <em>a negatively charged ion</em>)  by  gaining one electron each.

When writing down   formula of ionic compound, the formula  of cation  is written  first followed by anion  formula. therefore  Ca is written  first  followed by I.

The numeric subscript 2 after I(iodine) indicate that 2 atoms of iodine are involved  in bonding.

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Which of these is the main difference between aerobic respiration and anaerobic respiration?
Anettt [7]

Answer:

Aerobic Respiration

It can be found in the cytoplasm and the mitochondria.

Glucose breaks down into carbon dioxide and water.

Anaerobic Respiration

It can be found only in the cytoplasmic.

Glucose breaks down into ethyl alcohol, carbon dioxide and energy

6 0
3 years ago
What type of reaction is Zn + CuCl2 → Cu + ZnCl2?​
Shalnov [3]

Answer:

Its single - displacement.

Explanation:

4 0
4 years ago
In a car crash, large accelerations of the head can lead to severe injuries or even death. A driver can probably survive an acce
Alexxandr [17]

Answer:

Velocity, u = 14.7 m/s

Explanation:

It is given that, a driver can probably survive an acceleration of 50 g that lasts for less than 30 ms, but in a crash with a 50 g acceleration lasting longer than 30 ms, a driver is unlikely to survive.

Let v is the highest speed that the car could have had such that the driver survived. Using a = -50 g and t = 30 ms

Using first equation of kinematics as :

v=u+at

In case of crash the final speed of the driver is, v = 0

0=u+at

-u=at

-u=-50\times 9.8\times 30\times 10^{-3}

u = 14.7 m/s

So, the highest speed that the car could have had such that the driver survived is 14.7 m/s. Hence, this is the required solution.

8 0
3 years ago
If the force of the soccer player’s head on the ball is 1.5 N upward, what is the force of the ball on the player’s head?
Elanso [62]

Answer:

-1.5 N because 1.5 N would be upwards and -1.5 N would be downwards

3 0
3 years ago
Read 2 more answers
Question 8 1.2 pts an atom of bromine has a mass about four times greater than that of an atom of neon. which choice makes the c
Scorpion4ik [409]
Neon = app. 20.1795 g/mol 
<span>Bromine = app. 79.904 g/mol </span>
<span>-----> 79.904 g/mol / 20.1795 g/mol = 3.96 (Close to 4) </span>

<span>Using Moles In 1000 g </span>

<span>1000 g / 20.1795 g/mol = app. 49.555 mol of Ne </span>
<span>1000 g / 79.904 g/mol = app. 12.515 mol of Br </span>
<span>-----> 49.555 mol / 12.515 mol = 3.96 (Close to 4) </span>

<span>Using Avogadro's Number </span>

<span>49.555 mol x 6.022x10^23 atoms = app. 2.984x10^25 atoms of Ne </span>
<span>12.515 mol x 6.022x10^23 atoms = app. 7.537x10^24 atoms of Br </span>
<span>-----> 2.984x10^25 / 7.537x10^24 = 3.96 (Close to 4) </span>

<span>So no matter how you look at it or calculate it, the answer is always the same. </span>

<span>I hope it helps!</span>
8 0
3 years ago
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