Chemistry High School

1. The multiplicative inverse of 5/9 is.....
a-9/5
b-9/5
c-3/9
d-None of these​

Answers

Answer 1

Answer:

None of these cause the correct answer is 9/-5

Answer 2
The Answer Is None Of These
But The Answer Is -5/9

Related Questions

True or false: Heterotrophs need to go find and eat food.?


:FALSE

:TRUE

Answers

Answer:

Explanation:

Heterotrophs cannot make their own food, so they must eat or absorb it. For this reason, heterotrophs are also known as consumers. Consumers include all animals and fungi and many protists and bacteria. They may consume autotrophs or other heterotrophs or organic molecules from other organisms

Name the 3 steps involved in the treatment of polluted water? class 7​

Answers

Explanation:

The processes involved in removing the contaminants include physical processes such as settling and filtration, chemical processes such as disinfection and coagulation, and biological processes such as slow sand filtration

PLEASE HELP!! Is this an element or compound?
copper (ll). oxide (CuO)
Please hurry!!

Answers

Answer: Compound

Explanation:

Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO. A black solid, it is one of the two stable oxides of copper, the other being Cu₂O or copper(I) oxide. As a mineral, it is known as tenorite.

Which of the following could not be an empirical formula? a CH4 b Na2O c NaCl d H2O2

Answers

Answer:

C NaCl will not be an empirical formula.

Answer:

C naCl

Explanation:

it wouldnt be an empiricla formula

how many molecules are there in 0.45 moles of so3

Answers

Answer:

2.71

Explanation:

Solutions of potassium chloride and silver nitrate are mixed.

Answers

Answer:

A solution of potassium chloride when mixed with silver nitrate solution forms an insoluble white substance silver chloride.

Explanation:

:)

When you watch a sunset, is the Sun really moving across the sky? What's happening?
(Science)

Answers

It is the earth spinning around its axis. It makes a complete turn every 24 hours. It turns toward the east

The unique shape of DNA allows what

Answers

Answer: to copy itself during cell division

Explanation:

The genetic information found in DNA, chromosomes, and determines
A. the traits of the organism
B. the organism as an animal
C. the safety of the nucleus
D. the type of cell

Answers

Answer:

a

Explanation:

the traits of the organism

Calculate the number of moles of gas that occupy a 16L container at a pressure of 3 atm and a temperature of 48oC

Answers

Answer:

1.81

Explanation:

3*16=n(0.0821)(48+273)

6. Three ice cubes are placed inside a glass of hot chocolate. Which of the following best
explains the heat transfer occurring inside the glass?
bat abanslate
ITS NUMBER 6!!!
PLZZ HELP ASAP!!!

Answers

It’s the first 1 M yea it’s the first one

Which type of bonding forms due to electrical attractions between oppositely charged elements

Answers

Answer:

Explanation:

Ionic bond

Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.

Which group of microorganisms has the ability to mutate?

Answers

I think it’s viruses .

2. Combine lead (II) nitrate and potassium iodide solutions.

Pb(NO3)2+ Kl →

2. Combine lead (II) nitrate and potassium iodide solutions.
Pb(NO3)2+ Kl →
3. Combine magnesium metal and hydrochloric acid solution.
Mg + HCl →
4. Electrolysis (splitting) of water.
H2O →
5. Burning magnesium.
Mg + O2 →

Answers

Answer:

Pb(NO3)2+ 2Kl →PbI2 + 2KNO3

Mg + 2HCl → MgCl2 + H2

4H2O → 4H^+ + 4OH^-

2Mg + O2 → 2MgO

Explanation:

This question has to do with the balancing of chemical reaction equations. The general rule for balancing chemical reaction equation is that the number of atoms of each element on the left hand side of the reaction equation must be equal to the number of atoms of the same element on the right hand side of the reaction equation.

This principle was followed in balancing each reaction equation above. For instance, in the burning of magnesium, there are two atoms of both magnesium and oxygen on either side of the reaction equation.

what is the mass in grams of 1.204x10^24 molecules of hydrogen gas (H2) ?

Answers

Answer:

4.03 g

Explanation:

The mass in grams of the hydrogen gas is 4.0 g

Stoichiometry

From the question,

We are to determine the mass in grams of the hydrogen gas.

First, we will determine the number of moles of hydrogen gas present.

Using the formula,

[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]

From the given information,

Number of hydrogen molecules = 1.204 × 10²⁴ molecules

Thus,

Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]

Number of moles of hydrogen gas present = 2 moles

Now, for the mass of the hydrogen gas

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of hydrogen gas = 2.016 g/mol

Then,

Mass of the hydrogen gas = 2 × 2.016

Mass of the hydrogen gas = 4.032 g

Mass of the hydrogen gas ≅ 4.0 g

Hence, the mass in grams of the hydrogen gas is 4.0 g

Learn more on Stoichiometry here: https://brainly.com/question/2861244

ILL GIVE 100 POINTS!!!HELP!! THIS IS FOR CHEM!!an object acted upon by an unbalanced force will accelerate in the direction of the force is newtons what law?

1:second law

2:first law

3:third law

Answers

it’s newton’s first law but that’s a physics question

The inflation of airbags is due to the breakdown of a single chemical substance into two separate substances.

Two molecules of sodium azide (NaN3) break down into sodium (Na) and nitrogen gas (N2) during the reaction.

How many sodium (Na) atoms are produced in the reaction?

1 Na atom
2 Na atoms
3 Na atoms

Answers

Answer:

The correct answer would be

B. 2 Na atoms

Explanation:

As seen in the picture below,

Elements are organized on the table according to their _____________ ___________ , usually found near the top of the square.

Answers

Answer:

atomic number

Explanation:

Elements are organized on the table according to their atomic number, usually found near the top of the square.

Answer:

by their atomic number

hope this helped

x=2 and y=3
find the value of
3x + y
3x² - 4
solve this please ty​

Answers

Answer:

3x+y = 9

3x² - 4 = 8

Explanation:

3x+y

3(2)+3

9

3x2-4

3(2)^2-4

3

Yes
OO
No
Balanced or Not Balanced? *
2 NaCl + 2 F2 → 2 NaF + 1 C12
Yes
No

Answers

Answer:

No, not well balanced

Explanation:

2Nacl+F2=2Naf+Cl2

Al2(SO4)3 + 6 K --- > 3 K2SO4 + 2 Al


In an experiment, 46.8 grams of aluminum sulfate is reacted to make how many grams of potassium sulfate?

Answers

The answer is 71.5g of potassium sulfate

Calculate the concentration:

2a) 45g of sodium hydroxide in 3dm3 of solution.

2b) 0.256g of sodium chloride in 500cm3 of solution.

Answers

Answer:

2a) 15 g/dm3

2b) 0.512 g/dm3

Explanation:

Use the concentration = mass/volume equation.

8. The most common element used in nuclear fission reactors is uranium. The three nuclides, U-233, U-235, and U-238, are isotopes of uranium because they have the same number of protons per atom and...*
(1) the same number of electrons per atom
(2) the same number of neutrons per atom
(3) a different number of electrons per atom
(4) a different number of neutrons per atom​

Answers

Answer:(D) different number of neutrons per atom

Explanation: Honestly, I just looked it up on Socratic.

I'LL GIVE 30 POINTS PLEASE ANSWER!!!
Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope? Match each label to the correct cell part. Question 5 options: Golgi Apparatus Nucleus Endoplasmic Reticulum Mitochodrion Ribosome Lysosome
1.

2.

3.

4.

5.

6.

Answers

1.Golgi
2. nucleus
3.Endoplasmic
4.Mitochondria
5.Ribosome
6.Lysosome

What causes heat or the transfer of energy from one object to another

Answers

Answer:

The answer is kinetic energy

A certain first-order reaction has a half-life of 20.0 minutes. How much time is required for this reaction to be 75% complete?

Answers

Answer:

X = 2

Explanation:

As you know, the rate of a first-order reaction depends linearly on the concentration of a single reactant. The rate of a first-order reaction that takes the form

In 2005, scientists used cells from a dog named Tai to produce a new puppy with DNA identical to Tai's.

What genetic technology was used?

Answers

Answer:

Cloning

Explanation:

This is the process of producing a organism genetically identical to the organism the cells came from.

Answer: cloning

Explanation:

Which diatomic molecule (H2, N2 or O2) forms the strongest bond and why

Answers

Answer:

Hydorgen will.

Because hydrogen has 1 as valency.

Which salt is the most common found in ocean water?

magnesium


calcium carbonate


potassium


sodium chloride

Answers

Answer:

Sodium chloride

Explanation:

There are several salts in seawater, but the most abundant is ordinary table salt or sodium chloride (NaCl). Sodium chloride, like other salts, dissolves in water into its ions, so this is really a question about which ions are present in the greatest concentration. Sodium chloride dissociates into Na+ and Cl- ions.

D sodium chloride sodium is salt

P5-F2 + Ar --> ArF3
P5a- How many moles of F2 (Fluorine) are needed to produce 9 mole of ArF3 (Argon trifluoride)?
P5b- How many moles of Argon (Ar) are consumed in a reaction that consumes 5 moles of F2 (fluorine)?


I need the answers for the p5 part please help

Answers

Answer:

5a. 13.5 moles of F₂

5b. 3.33 moles of Ar.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

3F₂ + 2Ar —> 2ArF₃

From the balanced equation above,

3 moles of F₂ reacted with 2 moles of Ar to produce 2 moles of ArF₃.

5a. Determination of the number of mole of fluorine, F₂, needed to produce 9 moles of ArF₃.

From the balanced equation above,

3 moles of F₂ reacted to produce 2 moles of ArF₃.

Therefore, Xmol of F₂ will react to produce 9 moles of ArF₃ i.e

Xmol of F₂ = (3 × 9)/2

Xmol of F₂ = 13.5 moles

Thus, 13.5 moles of F₂ is needed.

5b. Determination of the number of mole of Ar needed to react with 5 moles F₂.

From the balanced equation above,

3 moles of F₂ reacted with 2 moles of Ar.

Therefore, 5 moles of F₂ will react with = (5 × 2)/3 = 3.33 moles of Ar.

Thus, 3.33 moles of Ar was consumed.

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(please give an actual answer...)*examples of required output at the bottom*code: public class CircularList{private ListNode head;private ListNode tail;private int size;public CircularList(){head = tail = null;size = 0;}public int size(){return size;}public boolean isEmpty(){return (size == 0);}public int first(){if (head != null) {return head.getValue();}return -1;}public Integer last(){if (tail != null) {return tail.getValue();}return -1;}public void addFirst(Integer value){head = new ListNode(value, head);if (tail == null) {tail = head;}size++;}public void addLast(Integer value){ListNode newTail = new ListNode(value, null);if (tail != null) {tail.setNext(newTail);tail = newTail;} else {head = tail = newTail;}size++;}public void addAtPos(int pos, Integer value){if (pos == 0) {addFirst(value);return;}if (pos size) {return;}if (pos == size) {addLast(value);return;}ListNode ptr = head;for(int i=0; i = size) {return retVal;}if (pos == 0) {return removeFirst();}ListNode ptr = head;for(int i=0; iptr = ptr.getNext();}retVal = ptr.getNext().getValue();if (pos == size-1) {tail = ptr;tail.setNext(null);} else {ptr.setNext(ptr.getNext().getNext());}size--;return retVal;}public int findNode(Integer find){ListNode ptr = head;for(int pos=0; posif (ptr.getValue() == find) {return pos;}ptr = ptr.getNext();}return -1;}public void rotate(){addLast(removeFirst());}public String toString(){String output = "";ListNode iter = head;while(iter != null) {output += String.format("%d ", iter.getValue());iter = iter.getNext();}return output;}}size = 6 first = 50 last = 6050 20 10 40 30 60removeFirst = 50size = 5 first = 20 last = 6020 10 40 30 60removed = 30size = 4 first = 20 last = 6020 10 40 60size = 4 first = 20 last = 6020 10 40 60found at -1removed = -1size = 4 first = 20 last = 6020 10 40 60size = 4 first = 10 last = 2010 40 60 20 21=-7nIt's a one-step equation. 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