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
Tomtit [17]
2 years ago
6

Help on this question please

Chemistry
2 answers:
dedylja [7]2 years ago
5 0

Answer:

Choice 1: Position 3

Explanation:

The equinox is showed in Position 3 and 1.

Position 1 is fall, Position 2 is Winter, 3 is spring, 4 is summer. Since you are looking for the northern hemisphere, the shadowed area shown is position 2 is winter, spring is next in rotation so that already gives away the fact that position 3 is spring.

garri49 [273]2 years ago
4 0
Position 3 is the answer.
You might be interested in
The reaction below demonstrates which characteristic of a base?
svlad2 [7]

Answer: option D. the ability of a base to react with a soluble metal salt.


Justification:


NaOH is a strong base, which means that in water it will dissociate according to this reaction:


  • NaOH(aq) → Na⁺ (aq) + OH⁻ (aq)

On the other hand, CuSO₄ is a soluble ionic salt which in water will dissociate into its ions according to this other reaction:

  • CuSO₄(aq) → Cu²⁺ + SO₄²⁻

Hence, in solution, the sodium ion (Na⁺) will  react with the metal salt in a double replacement reaction, where the highly reactive sodium ion (Na⁺) will substitute the Cu²⁺ in the CuSO₄ to form the sodium sulfate salt, Na₂SO₄ (water soluble), and the copper(II) hydroxide, Cu(OH)₂ (insoluble).


That is what the given reaction represents:


  CuSO₄ (aq)     +     2NaOH(aq)    →    Cu(OH)₂(s)       +     Na₂SO₄(aq)

         ↑                                ↑                         ↑                            ↑

soluble metal salt       strong base       insoluble base       solube salt



5 0
3 years ago
Read 2 more answers
Polyester is a synthetic material used for many different purposes. It is produced from petroleum and natural gas. Producing pol
notka56 [123]

Answer:

A. Producing certain synthetic materials could have a greater environmental impact than disposing of them.

Explanation

I just did this question and got it right.

3 0
2 years ago
What mass of natural gas (ch4) must you burn to emit 272 kj of heat?
balandron [24]
CH4 + 2 O2 ---> CO2 + 2 H2O Q = 891,6 kJ / mol CH4

1 mol CH4 = 16 g

16 g ---- 891,6 kJ
x g ----- 272 kJ

x = 272 kJ × 16 g / 891,6 kJ = 4,88 g

You must burn 4,88 g of CH4.

:-) ;-)
7 0
3 years ago
Why do covalent compounds tend to have lower melting points than ionic compounds?
vitfil [10]
Because ionic compounds' strong bonds form network structures, which have a stronger attraction than the covalent compounds which are molecules.
6 0
3 years ago
Read 2 more answers
How many grams of CH4 will be in a 500ml contain at STP?
ArbitrLikvidat [17]

Answer:

Mass = 0.32 g

Explanation:

Given data:

Mass of CH₄ = ?

Volume of CH₄ = 500 mL (500 mL× 1L/1000 mL= 0.5 L)

Temperature = 273 K

Pressure = 1 atm

Solution:

Volume of CH₄:

500 mL (500 mL× 1L/1000 mL= 0.5 L)

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

By putting values,

1 atm× 0.5 L = n×0.0821 atm.L/ mol.K  × 273 K

0.5 atm.L = n×22.4 atm.L/ mol

n = 0.5 atm.L / 22.4 atm.L/ mol

n = 0.02 mol

Mass in gram:

Mass = number of moles × molar mass

Mass = 0.02 mol × 16 g/mol

Mass = 0.32 g

7 0
3 years ago
Other questions:
  • ''Particles have forces of attraction between them" PLEASE HELP ME WRITE A SHORT PARAGRAPH ABOUT THIS
    15·1 answer
  • Which electromagnetic wave has the longest wavelength?
    14·1 answer
  • The two reactants combine to form a single product, ammonia, nh3, which is not shown. write a balanced chemical equation for the
    9·1 answer
  • A weak acid. What is the pH of a 0.1 M solution of acetic acid (pKa = 4.75)?
    7·1 answer
  • What is the main difference in covalent bonds in diatomic chlorine and diatomic oxygen? diatomic means two atoms of the same typ
    9·1 answer
  • Need chemistry help look on the picture answer all questions please
    13·1 answer
  • How many moles of Na2CO3 are in 100.0ml of a 2.0M solution?
    11·1 answer
  • Сульфат железа (II) окисляется в кислой среде перманганатом калия до Fe2(SO4)3, т.е. окисляется. Запишите и приравняйте уравнени
    10·1 answer
  • J.J. Thomson's plum pudding model of the atom followed the discovery of
    13·2 answers
  • Consider the molecular orbital model of benzene. In the ground state, how many molecular orbital's are filled with electrons? Se
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!