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Dafna11 [192]
3 years ago
14

Your family as an old apple tree in your backyard Your mom loves using the tree's apples to make pies. You don't care for apples

,but you enjoy reading under the tree's shade Which phrase bost describes the ecosystem services that the tree provides for you and your mom?
only and aesthetic services and direct services

only indirect services

indirect and direct services

Only ethical and aesthetic services
Chemistry
2 answers:
Effectus [21]3 years ago
8 0

Answer:

indirect and direct services

Explanation:

nice pfp

damaskus [11]3 years ago
5 0

Answer:

ethical and aesthetic services and direct services

Explanation:

I just took the test and it's NOT indirect services and direct services like the other person said. It's ethical and aesthetic services and direct services.

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I need help please and thank you! Also if you found the answer can you explain how you did, like wat did u search for...if it’s
belka [17]

Answer:

C.  

Explanation:

Stereoisomers are molecules that have the same molecular formula and with their atoms connected in the same way but pointing in different directions.

<em>cis</em>-Pent-2-ene has formula C₅H₁₀

A. is wrong, because its formula is C₅H₁₂

B. and D. are wrong, because their formulas are C₅H₈

The only option left is C. It has formula C₅H₁₀

C. is a stereoisomer of <em>cis</em>-pent-2-ene, because atoms 1 and 4 are on opposite sides of the double bond.

Think of the C=C bond as a river.

In the <em>cis </em>isomer (top), atoms 1 and 4 are on the same side of the river (zis = zame zide).

In the <em>trans</em> isomer (bottom), atoms 1 and 4 are on opposite sides of the river (trans = across or opposite).

So, C. is a stereoisomer of cis-pent-2-ene.

8 0
2 years ago
What is a atom of chemistry
Yuliya22 [10]

Answer:

Atom is the smallest particle of matter.

Elements are made up of same atoms.

Atom consist of electron, proton and neutron.

Explanation:

Atom was first discovered by John Dalton.

word "Atom" came from Greek word, that means something that could not split. he explained that atom is indivisible particle.

In the end of 18th century J.J. Thomson put forward a new concept of atom. he said that atom have negative charged particles called electrons but overall atom is neutral.

In 1909 Rutherford with his students discovered positive charged particles and nucleus and said that it is in the center of atom.

He explain a model of atom and said that electrons revolve around a hard core in the center called nucleus.

In 1913 Niels Bohr  explains the atomic spectra and put forward the concept of shells and sub-shells.

So overall Structure of an Atom is

  • consist of Neutrons in nucleus
  • +ve charged protons in nucleus
  • A -vely charged electrons revolving around the nucleus
  • the electron revolve in shells i.e. K, L, M, and N
  • Each shell divide in sub-Shell such as s, p,d and f.

Atom has a specific atomic mass and atomic number

Atomic number = number of protons or electron

Atomic mass = number of protons +  number of neutrons in nucleus.

8 0
3 years ago
CaC2 + 2H2O ⟶ C2H2 + Ca(OH)2
kondaur [170]

0.499 mol

Explanation: M(CaC2) = 64.1 g/mol, n= m/M = 32.0 g/ 64.1 g/ mol= 0.499 mol

Amount of Calcium hydroxide Is same

7 0
3 years ago
Someone pls pls pls help me with this question.
Arisa [49]

\rm{\pink{\underline{\underline{\blue{REASON:-}}}}}

⭐ Elements in which the last electron enters any one of the five d-oribitals of their respective penultimate shells are called as <u>d-block</u><u> </u><u>elem</u><u>ents</u> .

⭐ But the last electron of Zn , Cd , Hg and Cn enters in the s-oribital of their respective ultimate shells rather than the d-oribitals of their respective penultimate shells . Therefore, these elements cannot be regarded as d-block elements .

☃️ But properties of these elements resemble to the d-block elements rather than s-block elements .

☃️ Therefore, to make the study of periodic classification of elements more rational, they are studied along with d-block elements .

✍️ Thus <u>on the basis of properties</u> all transition elements are d- block elements, but <u>on the basis of electronic configuration</u> all d -block elements are not transition elements .

3 0
3 years ago
What is the formula of acceleration?​
TEA [102]

Answer:

The formula of acceleration is final velocity-initial velocity÷time taken

Explanation:

v-u/t

7 0
2 years ago
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