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Elis [28]
3 years ago
9

Determine the missing species:

Chemistry
1 answer:
Galina-37 [17]3 years ago
5 0

Answer: 4. ^{0}_{-1}\textrm{e} and ^{0}_{1}\textrm{e}

Explanation:

a) The given reaction is ^{41}_{20}\textrm{Ca}+^{x}_{y}\textrm{X}\rightarrow ^{41}_{19}\textrm {K}

As the mass on both reactant and product side must be equal:

41+x=41

x=0

As the atomic number on both reactant and product side must be equal:

20+y=19

y=-1

^{41}_{20}\textrm{Ca}+^{0}_{-1}\textrm{e}\rightarrow ^{41}_{19}\textrm {K}

b) ^{15}_{8}\textrm{O}\rightarrow ^{15}_{7}\textrm{N}+^{x}_{y}\textrm{X}

Total mass on reactant side = total mass on product side

15 =15 + x

x = 0

Total atomic number on reactant side = total atomic number on product side

8 = 7 + y

y = 1

^{15}_{8}\textrm{O}\rightarrow ^{15}_{7}\textrm{N}+^{0}_{1}\textrm{e}

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A fisher is a small but ferocious predator that feeds on mice, chipmunks, young deer foals, and porcupines. Which of the followi
anzhelika [568]

A. a wide variety of hunting techniques

Explanation:

To help the fisher population to survive in a changing environment, they have to develop a wide variety of hunting techniques.

The new fisher population have to develop a wide range of strategies to satisfy its carnivorous instincts.

  • Most predators are carnivores with a wide range of hunting skills
  • They must be fast, subtle, good sighted and well adapted body part to hunt of preys.
  • As they transcends different environments, they must have good and diverse hunting skills to give them a competitive advantage.

Learn more:

Animal domestication brainly.com/question/3807452

#learnwithBrainly

5 0
3 years ago
An element has this information:
SVETLANKA909090 [29]

Answer:

hydrogen

Explanation:

5 0
3 years ago
Classify each statement as a property of ethers, alcohols, or both ethers and alcohols?
natita [175]

Explanation:

1. Only alcohols forms hydrogen bond  between themselves and with other compounds containing an O-H, N-H, or F-H bond, such as water.

2. Alcohols up to 4 carbons are miscible in water because they have hydrogen bonded to oxygen and can form hydrogen bond with water. However, it is not possible for ethers.

3. When comparing ethers and alcohols of similar molecular weights, ethers have lower boiling point than alcohol. This is because of the presence of hydrogen bond in alcohols.

8 0
3 years ago
What is the mass, in grams, of a sample of 6.98 × 1024 atoms of magnesium (Mg)? Show your work or explain the steps that you use
CaHeK987 [17]

Hello!

* First Step: to know Avogrado's Law

We know that by the Law of Avogrado, for each mole of substance we have 6.02*10²³ atoms, if:

** Second Step: to know the molar mass of the solute

The molar mass of of magnesium = 24.30 g/mol

*** Third step: make the ratio mass / mol with atoms

1 mol we have 6.02*10²³ atoms

1 mole of Mg we have 24.30 g

Then we have:

24.30 g ------------- 6.02*10²³ atoms

x ----------------------- 6.98*10^24 atoms

\dfrac{24.30}{x} = \dfrac{6.02*10^{23}}{6.98*10^{24}}

multiply cross

6.02*10^{23}*x = 24.30*6.98*10^{24}

6.02*10^{23}\:x = 1.69614*10^{26}

x = \dfrac{1.69614*10^{26}}{6.02*10^{23}}

\boxed{\boxed{x \approx 281.75\:grams}}\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

7 0
3 years ago
Select all that apply. Which statements concerning this diagram are correct?
belka [17]
Hello, let me break this down for you! :)
A is your energy of your reactants, B is your activation energy, so the total value could be found from B-Y. C is the value of your energy of your products. X is your delta H value. So in this, your products are higher energy than the reactants, so H is + and e2-E1 is positive so E2 >E1
Therefore your answers would just be <span>E2 > E1 and
</span><span>Hrxn<span> is positive.
Hope this helps! If you have any other questions or need further explanation just let me know! :)
</span></span>
5 0
4 years ago
Read 2 more answers
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