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
Pani-rosa [81]
3 years ago
5

You walked outside at lunch time on March 21st and look up in the sky and see the Sun directly overhead. You recall that there w

ill be equal lengths of day and night on this particular day. This occurs because the Sun's rays fall in which direction over the Equator?
Question 10 options:

A.At many different angles to the equator

B.At 24 degree angles to the equator

C.At 45 degree angles to the equator

D.Directly at right angles to the equator
Chemistry
1 answer:
Lisa [10]3 years ago
6 0
A. at many different angles to the equator
You might be interested in
If a solution conducts electricity and has a pH value of 7 then it could be
stealth61 [152]
The solution that conducts electricity and has a pH value of 7 would most likely be a neutral solution. Water is among the best examples of a neutral solution. When the pH of a solution is considered to be lesser than 7, it is an acid, while if the pH is greater than 7, it is considered to be a basic solution.
7 0
3 years ago
A 2.684-g sample of zinc oxide was reduced by hydrogen gas, resulting in 2. 156 g of pure zinc metal. Determine the empirical fo
Afina-wow [57]

The empirical formula of the initial zinc oxide is ZnO.

<h3>What is Empirical Formula?</h3>

The empirical formula of a compound represents the ratios of elements in a compound but not the actual numbers or arrangement of the atoms.

It is the lowest whole number ratio of the element in the compound.

<h3>How to find out the empirical formula?</h3>
  • Find out the given masses and molar masses of the elements

The molar mass of Zn = 65 gmol⁻¹

Given the mass of Zn = 2.156 g

The molar mass of Oxygen = 16 gmol⁻¹

The mass of Oxygen = Mass of a sample of zinc oxide - the mass of zinc metal

                                   = (2.684 - 2.156) g

                                   = 0.528 g

  • Find the number of moles of the elements in the compound

The number of moles is given by

n = \frac{m}{M}

where m = given mass and

M = Molar mass

Number of moles of Zinc = \frac{2.156}{65} = 0.033 moles

Number of moles of Oxygen =\frac{0.528}{16} = 0.033 moles

  • Find the simplest ratios of the elements in the compound. To find the ratios simply divide the number of moles by the lowest number of moles obtained.

Here, the number of moles is the same for both elements. Hence, the simplest ratio for Zn:O is 1:1.

Therefore, the empirical formula of zinc oxide is ZnO.

Learn more about the empirical formula:

brainly.com/question/1603500

#SPJ4

 

5 0
1 year ago
1 An atom has 24 protons, 22 electrons, and 28 neutrons. What is the atomic number of the atom?
Nataly_w [17]

Answer:

24

Explanation:

3 0
3 years ago
a friend is trying to describe a material to you. which of the following is not a description of a physical property of the subs
Masja [62]

The answer for it is C. when you mix it with water it fizzes

4 0
3 years ago
26.0 g of a liquid that has a density of 1.44 g/mL needs to be measured out in a graduated cylinder. what volume should be used
Vaselesa [24]
As Density = Mass/Volume
Mass = 26.0g 
Density = 1.44g/mL
Therefore Volume = Mass/Density
=> Volume = 26.0/1.44 = 18.055... = 18.1mL (to 3 sig figs)

4 0
3 years ago
Read 2 more answers
Other questions:
  • Some hidden evidence can be seen with this type of light
    12·1 answer
  • Which element had the longest effect on human history?
    8·1 answer
  • What does it mean for a sulution to be saturated?
    13·2 answers
  • What concentration of so32– is in equilibrium with ag2so3(s) and 9.50 × 10-3 m ag ? the ksp of ag2so3 can be found here?
    13·1 answer
  • Label each Formula In the Chemical equation Below As either A reactant or a product
    10·1 answer
  • An atom of boron has an atomic number of 5 and an atomic mass of 11. The atom contains
    15·1 answer
  • Which best describes the law of conservation of mass? The coefficients in front of the chemicals in the reactants should be base
    15·2 answers
  • What benefits does sweet n low have
    12·1 answer
  • Dead leaves and plants on the ground form what??
    7·1 answer
  • Apakah setengah persamaan pengoksidaan,setengah persamaan penurunan dan persamaan ion keseluruhan bagi larutan kuprum(II)nitrat+
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!