Chemistry High School

In a submarine beneath the ocean’s surface, a captain peered into a long tube to see possible threats in the sea and air above. This sight tube, called a periscope, was designed by the Frenchman Marie Davey in 1854. Davey’s periscope contained two mirrors, one placed at each end of a vertical tube. The mirrors were set parallel to each other and at 45 degrees to the vertical. The reflective surfaces faced each other. When light from an object on the surface reflected downward, an image appeared to the eye. People in submerged submarines could see what was above them!

Imagine you are in a submerged submarine looking through a periscope. What are some things you might see?

Answers

Answer 1

Water, water, and even more water the water will drive you mad

Related Questions

True or false? Covalent molecules are formed when non-metal atoms share electrons with other non-metal atoms.

Answers

Answer:

true

covalent bonds are between non metals and nonmetals. and they are sharing electrons.

What is the percent composition of C4H10? (4 points)
44.6% C and 45.4% H
57.3% C and 42.7% H
82.7% C and 17.3% H
89.4% C and 10.6% H

Answers

Answer:82.7% C and 17.3% H

Explanation:

C4 = 12.0107g/mol x 4 = 48.0428 g/mol

H10 = 1.00794 g/mol x 10 = 10.0794 g/mol

Molar Mass of Butane, C4H10 = 48.0428 g/mol + 10.0794 g/mol= 58.1222 g/mol

percent composition of Carbon is = ( mass of carbon contained in butane / molar mass of Butane) x 100

=(48.0428 /58.1222) x 100% = 0.8265 x 100

=82.65% =82.7% of Carbon.

Percent composition of Hydrogen = (mass of Hydrogen contained in Butane / molar mass of Butane )x 100

( 10.0794/58.122 ) x 100% =0.1734 x 100

= 17.3% OF Hydrogen.

Answer:

C- 82.7% C and 17.3% H

Explanation:

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If a substance melts at 20oC, what is its freezing point?

Answers

Answer:

It is difficult, if not impossible, to heat a solid above its melting point because the heat that ... in a solid are packed in a regular structure that is characteristic of that particular substance.

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Q.3 Which the following statements about the given reaction are correct:
3Fe(s) + 4H2O(g)- Fe203 (S) + 4H2(g)
i) Iron metal is getting oxidized
ii) Water is getting reduced
iii) Water is acting as reducing agent
iv) Water is acting as oxidizine agent
a) (i), (ii) and (iii) b)(iii) and (iv)
c) (i), (ii) and (iv) d) (ii) and (iv)

Answers

Answer:

The statements which are correct are;

c) (i), (ii) and (iv)

Explanation:

The chemical equation is presented as follows;

2Fe(s) + 3H₂O(g) → 3Fe₂O₃(s) + 3H₂(g)

Therefore, we have;

i) The iron gains oxygen atoms and therefore gets oxidized

The iron loses 3 electrons each to become oxidized to Fe³⁺ in Fe₂O₃

ii) The water loses oxygen and therefore it is getting reduced

iv) The water donates oxygen and therefore it is acting as the oxidizing agent

The correct options are (i), (ii) and (iv).

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Answers

Answer:

Explanation:

I got this i am very smart

Answer:

The answer is 3) same mass more volume

Explanation:

Mass measures the amount of matter in a substance or an object.

Volume measures the amount of space that a substance or an object takes up.

Phosgene (Cl2CO), a poison gas used in World War I , is formed by the reaction of Cl2 and CO. The proposed mechanism for the reaction is

Cl2⇌2Cl(fast,equilibrium)

Cl+CO⇌ClCO(fast,equilibrium)

ClCO+Cl2→Cl2CO+Cl(slow)

What rate law is consistent with this mechanism?

Answers

Answer:

Rate = k [ClCO][Cl2]

Explanation:

Cl2⇌2Cl(fast,equilibrium)

Cl+CO⇌ClCO(fast,equilibrium)

ClCO+Cl2→Cl2CO+Cl(slow)

The rate determining step from which the rate aw is obtained from is the slowest step of a chemical reaction. In this reaction, the slowest step is;

ClCO+Cl2 → Cl2CO+Cl (slow)

The rate equation for the step is;

Rate = k [ClCO][Cl2]

ClCO is an intermediate and would eventually get cancelled out from the overall rate equation.

Phosgene is the chemical used in the formation of pesticides and ios poisonous. The rate law is given as, k [chloroformylradical][chlorine gas].

What is rate law?

The rate law is the relation of the concentration of the reactants and the products with that the speed of the reaction.

The reaction for the formation of phosgene is given as,

[tex]\rm Cl_{2} \rightleftharpoons 2Cl\; (fast,equilibrium)\\\\\rm Cl+CO \rightleftharpoons ClCO\; (fast,equilibrium)\\\\\\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)[/tex]

The rate law is determined by the rate-determining step which is the slowest step of the reaction.

[tex]\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)[/tex]

The rate of the equation is given as,

[tex]\rm Rate = k [ClCO][Cl_{2}][/tex]

As COCl is an intermediate the third step will be the rate-determining step.

Therefore, the slow step determines the rate of the reaction.

Learn more about rate law here:

https://brainly.com/question/9233410

Question:
One of the properties we associate with diamonds is their luster. How would you define this
term?

Plz help?!

Answers

Answer:

luster means either sheen/glow or reflected light

Explanation:

luster is the appearance of mineral's surface in terms of light-reflective qualities

What is involved in creating genetically modified bacteria?
A. allowing them to reproduce freely
B. changing their food source
c. using biotechnology techniques
D. growing them on selected plants

Answers

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chemical equation for table salt and water

Answers

Answer:

sodium chloride—is NaCl.

Explanation:

Table salt is an ionic compound, which breaks into its component ions or dissociates in water. These ions are Na+ and Cl-. The sodium and chlorine atoms are present in equal amounts (1:1 ratio), arranged to form a cubic crystal lattice.

Answer:

Chemical equation for nacl dissolving in water

NaCl(s) H2O⇌ Na+(aq)+Cl−(aq) .

Explanation:

what does kyle learn at the end

Answers

Answer:

Umm who's Kyle?

Explanation:

Answer:

his skills aren’t as valuable to the team as he thought

Explanation:

A chemist determined by measurements that 0.0500 moles of nickel participated in a chemical reaction. Calculate the mass of nickel that participated in the chemical reaction.

Answers

Answer:

2.94 grams Nickle

Explanation:

All they are asking is to convert moles to grams

To do this, find the atomic mass of nickel using the periodic table: 58.693 g

0.05 mol * 58.693 g/1 mol = 2.93465 grams

What is the
difference between
dominant and
recessive traits

Answers

Answer:

An allele is dominant, it will express in a person the characteristic to which it is related. When an allele is recessive, it is less likely to express the function to which it is related. Recessive traits only occur when in a person both alleles are recessive.

Be able to describe the relationship between Freedom of Movement and phase change.

Answers

Ion knoe Wdym by “be able to describ’ so ima put it in my own words idr lol:)

if you talm bout some kentic energy or sum ok but other Dan dat ion knoe tbh

I can explain how transferring kinetic energy in and out of a substance can cause a change

What is the molarity of the following solution? 3.48 mol in 4.1 L of solution

Answers

Answer:

molarity is moles/L so take the 3.48 and divide it by 4.1L

and get 0.848... and need to keep your answer to 2 digits as that is th emost precise measurement you have (the 4.1L)

so 0.85mol/L

Explanation:

4. How many electrons do each of the following kinds of matter have in each atom? a. silver 47 protons electrons b. carton: 6 protons electrons Sodium: 11 protons electrons d. neon 10 protons electrons e. iodine. 53 protons electrons

Answers

Answer:

a. 47 electrons

b. 6 electrons

c. 11 electrons

d. 10 electrons

e. 53 electrons

Explanation: If you are talking about neutral atoms (where as the number of protons in an atom is equal to the number of electrons in the atom), or are just being introduced to atoms then the number of electrons will be equal to the number of protons the atom has. Or vice versa, the number of protons will be equal to the number of protons in an atom. For example, in a neutral atom, with 51 protons, will have 51 electrons. Or an atom with 5 electrons will have 5 protons.

A blueberry bush uses energy from the Sun to make carbohydrates. Which set of energy transformations BEST describe this process?

A.radiant energy → chemical energy → nuclear energy
B.radiant energy → nuclear energy → chemical energy
C.nuclear energy → radiant energy → chemical energy
D.nuclear energy → chemical energy → radiant energy

Answers

Fusion powers the sun. This creates nuclear energy, which then goes to earth in the form of radiation. The plants get sunlight and photosynthesise (the process of getting glucose by sunlight). The answer should be C.

An atom of the element chromium has an atomic number of 24 and a mass number of 52. How many electrons are in an uncharged atom of chromium?

0
24
28
52

Answers

Answer:

Explanation:

In an uncharged atom, the number of protons is always equal to the number of electrons. For example, carbon atoms include six protons and six electrons, so carbon's atomic number is 6.

Similarly, since an atom of chromium contains 24 protons, it also contains the same amount of electrons, which is 24.

Answer:

24 is your answer

Explanation:

1. Convert the following temperatures to K.
a) 104 C
b) -3 C

Answers

Answer:

a) 377 k

b) 270 k

Explanation:

a) 104 + 273 = 377 k

b) -3 + 273 = 270 k

Balance the following
Mn(NO2)2
+
BeCl2 →
Be(NO2)2 +
MnCl2

Answers

Answer:

Double Displacement (Metathesis)

Beryllium Chloride - BeCl2

Manganese(II) Chloride - MnCl2

Explanation:

Enter an equation of a chemical reaction and click 'Balance'. The answer will appear below

Always use the upper case for the first character in the element name and the lower case for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide

To enter an electron into a chemical equation use {-} or e

To enter an ion specify charge after the compound in curly brackets: {+3} or {3+} or {3}.

Example: Fe{3+} + I{-} = Fe{2+} + I2

Substitute immutable groups in chemical compounds to avoid ambiguity.

For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced,

but PhC2H5 + O2 = PhOH + CO2 + H2O will

Compound states [like (s) (aq) or (g)] are not required.

If you do not know what products are enter reagents only and click 'Balance'. In many cases a complete equation will be suggested.

Reaction stoichiometry could be computed for a balanced equation. Enter either the number of moles or weight for one of the compounds to compute the rest.

Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents.

The balanced equation for the given reaction is:

[tex]\rm Mn(NO_2)_2 + 2BeCl_2 \rightarrow 2Be(NO_2)_2 + MnCl_2[/tex]

In chemistry, a balanced equation is a representation of a chemical reaction that follows the law of mass conservation. It assures that on both sides of the equation, the total number of atoms of each element remains constant.