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mamaluj [8]
4 years ago
15

1 )Which of the following is a possible formula unit? PbO Li2B Al2Pb3 ClO

Biology
1 answer:
Nataly_w [17]4 years ago
4 0
1. PbO is a possible formula units, since O has charge of 2- and Pb can have a charge of 2+ or 4+, if it uses the 2+ ion, the charges will balance out to form PbO. Li+ and B(3-) would have Li3B, Al(3+) and Pb(2+) are both positive charges and would not balance out, Cl- and O(2-) are both negative charges and would not balance out.

2. Iodine is a halogen, so it has a charge of -1. Calcium is an alkaline earth metal in Group 2, so it has a charge of 2+. Therefore, if they were to form a formula unit, the resultant would be CaI2 (2 iodine atoms of 1- charge are needed to balance out the 2+ charge on the calcium atom).

3. Strontium is an alkaline earth metal with a charge of 2+, while phosphorus has a charge of 3-. Therefore, to balance the charges out, we would need 3 atoms of strontium and 2 atoms of phosphorus. This would give the formula unit of Sr3P2.
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Hence, all the options are correct.

5 0
3 years ago
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Clouds begin to form in the atmosphere when ? Causes ? Of water on earth
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4 years ago
An organism adapts to both biotic and abiotic factors in its environment. Decide if each adaptation is in response to a biotic o
Sauron [17]

Answer:

The correct answer is

1. A rabbit living in  a desert has long ears  to disperse heat- abiotic factor.

2. A moth immediately  dives to the ground  when it hears a bat- biotic factor.

3. A lizard stays warm  by sunning itself  on a rock- abiotic factor.

4. A cactus has spines  instead of leaves  to help conserve water- abiotic factors.

5. A petunia is  bright red to  attract hummingbirds- biotic factor.

6. A stick-bug blends in  with trees to hide  from predators- biotic factor.

Explanation:-

The environment includes both abiotic and biotic factors which can affect the ecosystem. Living elements like plants and animals which affect ecosystem are known as biotic factors while the non-living elements which include air, water, temperature are called abiotic factors.

In the given question the options affected by the biotic factors due to bat, due to hummingbirds and due to predators.

Options affected by the abiotic factors due to heat and due to water.

4 0
3 years ago
Critically analyze the following three popular training systems: bigger, faster, stronger (BFS); crossfit; and high intensity tr
elixir [45]

Answer:

The answer is explained below

Explanation:

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CrossFit- Crossfit is a strength and conditioning program mainly the mix of aerobic exercise, calisthenics (Body weight exercise). In this type of gyms use equipment for multiple disciplines including barbells, dumbbell, pull-up bars. This type of workout makes body more flexible and capable to bear the abnormalities when necessary. Many types of workout are in it like, Chipper (squats, press ups, burpees), Ladder.

HIT – High Intensity Training refers to the one set failure type training program promoted as the most effective and scientifically based strength training program. In this type of program multiple sets of each exercise are performed. Volume is the most common form of weight training program seen in the gym and fitness centers. HIT also recommended sporting persons.

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Nowadays CrossFit is the best workouts to have to do because it makes physically stronger, flexible and smarter.

6 0
3 years ago
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gulaghasi [49]

Answer:

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Explanation:

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