What are these answers Please Help

What Are These Answers Please Help

Answers

Answer 1

Answer:

Electronic flow

Explanation:

Electronic Flow from one to another


Related Questions

What is the balanced chemical equation for the reaction of aqueous sodium hydroxide and sulfuric acid?
Select one:
a.NaOH(aq) + H2SO4(aq) = H2O(l) + NaSO4(aq)
b.NaOH(aq) + H2SO4(aq) = H2O(l) + Na(SO4)2(aq)
c.2 NaOH(aq) + H2SO4(aq) = 2 H2O(l) + Na2SO4(aq)
d.NaOH(aq) + H2SO4(aq) = H2O(l) + Na2SO4(aq)

Answers

Answer:

H2SO4 + 2(NaOH) -----> Na2SO4 + 2(H2O).

Explanation:

true it false: Liquid molecules have more room to slide past one another which ls why they can easily change shape​

Answers

Answer:

[tex] \huge \boxed{TRUE}[/tex]

Explanation:

Liquid molecules have more room to slide past one another which is why they can easily change shape.

The contents of two beakers are described in the table.
Contents of Beakers
Beaker
Contents
Final Substance Formed
X
sugar, water sugar not visible in water
Y
sand, water sand settled at the bottom of the beaker

Answers

The answer is D. The final substance in Beaker X is a mixture and in Beaker Y is a pure substance.


The question tells us that the sugar is not visible. This is because it is soluble. The sugar has dissolved into the water, making the two a mixture. The sand, on the other hand, is not dissolved at all. The water and sand are two separate pure substances.

15 grams of hydrogen and 7.5 grams of oxygen were placed in a beaker. An explosion happened inside the baker that produced water. The beaker was never opened. How many grams of water were produced?

Answers

Answer:

16.8768 g

Explanation:

The reaction that takes place is:

2H₂ + O₂ → 2H₂O

First we convert the mass of hydrogen and oxygen into moles, using their respective molar masses:

H ⇒ 15 g ÷ 1 g/mol = 15 mol HO ⇒ 7.5 g ÷ 16 g/mol = 0.4688 mol O

There are significantly less oxygen moles than hydrogen moles, so oxygen is the limiting reactant.

We calculate the produced moles of water, using the moles of the limiting reactant:

0.4688 mol O * [tex]\frac{2molH_2O}{1molO_2}[/tex] = 0.9376 mol H₂O

Finally we convert water moles into grams, using its molar mass:

0.9376 mol H₂O * 18 g/mol = 16.8768 g

Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and 0.80 mole of sodium cyanate (NaCNO) in enough water to make 1.0 liter of solution.

Ka(HCNO) = 2.0 x 10^-4

Answers

The pH of a buffer solution : 4.3

Further explanation

Given

0.2 mole HCNO

0.8 mole NaCNO

1 L solution

Required

pH buffer

Solution

Acid buffer solutions consist of weak acids HCNO and their salts NaCNO.

[tex]\tt \displaystyle [H^+]=Ka\times\frac{mole\:weak\:acid}{mole\:salt\times valence}[/tex]

valence according to the amount of salt anion  

Input the value :

[tex]\tt \displaystyle [H^+]=2.10^{-4}\times\frac{0.2}{0.8\times 1}\\\\(H^+]=5\times 10^{-5}\\\\pH=5-log~5\\\\pH=4.3[/tex]

similar scientific themes are seen in what areas of science?
A. only in areas dealing with living things
B. in all areas of science
C. only in areas dealing with tinny particles
D. only in areas dealing with things on Earth

Answers

Answer:B

Explanation:

Answer b : in all areas

What is indicated by a letter in parentheses after a chemical
formula, such as (s)?
a) whether the reaction is fast or slow
b) the purity of the substance
c) the physical state of the substance
d) that the substance is a catalyst

Answers

The letter in parentheses after a chemical formula indicates c) the physical state of the substance.

The letters can be:

→ (s) for solid.

→ (l) for liquid.

→ (g) for gazeous.

→ (aq) for an aqueous solution (like NaCl (aq) - NaCl is dissolved in water)

Lisa wants to determine which melts faster, an ice cube or a popsicle. What procedure should she follow to conduct her experiment?
A.
Set an ice cube equal in size to a popsicle at room temperature, and time how long it takes each to melt.

B.
Set an ice cube and a chocolate popsicle at room temperature, and time how long it takes each to melt.

C.
Set any ice cube and any popsicle at room temperature, and time how long it takes each to melt.

D.
Set an ice cube and an orange popsicle at room temperature, and time how long it takes each to melt.

Answers

A- because they need to be the same size to be correct

In roses, the color red is dominant (R), and the color white is recessive (r). Based on the Punnett Square, what is the probability ratio that the roses will be white?

Answers

Answer:

0.25

Explanation:

From the given information:

The dominant trait R = red color; &

The recessive trait r = white

If a heterozygous traits Rr  crosses with a dominant trait RR;

The Punnet square will be as follows:

              R               r

R            RR             Rr

R            RR             Rr

Thus all the flowers are red and there is 50% dominant red rose flowers (RR) and 50% heterozygous red rose flowers (Rr).

Let assume that two heterozygous traits (Rr) cross together; Then the punnet square is:

          R         r

R        RR        Rr

r          Rr        rr

From the above punet square, we have:

0.25 dominant red rose flowers

0.5 heterozygous red rose flowers;

0.25 recessive white rose flowers.

How many grams of oxygen, O2, required for the complete combustion of 36 grams of pentane, C5H12 at standard conditions?

C5H12 + 8O2 -> 5Co2 + 6 H2O

Answers

Answer:

128 grams of oxygen, O₂, is required for the complete combustion of 36 grams of pentane, C₅H₁₂ under standard conditions.

Explanation:

The balanced reaction is:

C₅H₁₂ + 8 O₂ ⇒ 5 CO₂ + 6 H₂O

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

C₅H₁₂: 1 moleO₂: 8 molesCO₂: 5 molesH₂O: 6 moles

Being the molar masses of the compounds:

C₅H₁₂: 72 g/moleO₂: 32 g/moleCO₂: 44 g/moleH₂O: 18 g/mole

then, by stoichiometry, the following quantities of mass participate in the reaction:

C₅H₁₂: 1 mole* 72 g/mole= 72 gO₂: 8 moles* 32 g/mole=  256 gCO₂: 5 moles* 44 g/mole= 220 gH₂O: 6 moles* 18 g/mole= 108 g

Then you can apply the following rule of three: if by stoichiometry 72 grams of pentane react with 256 grams of oxygen, then 36 grams of pentane with how much mass of oxygen does it react?

[tex]mass of oxygen=\frac{36 grams of pentane*256 grams of oxygen}{72 grams of pentane}[/tex]

mass of oxygen= 128 grams

128 grams of oxygen, O₂, is required for the complete combustion of 36 grams of pentane, C₅H₁₂ under standard conditions.

Answer:

128 grams of oxygen, O₂, is required for the complete combustion of 36 grams of pentane, C₅H₁₂ under standard conditions.

Explanation:

Did the work trust!

True or false. The center of gravity and center of mass of an object need to be in the same spot?

Answers

Answer:

True................

Answer:

true

Explanation:

What is the definition of nucleus?

Answers

Answer:

The central and most important part of an object, movement, or group, forming the basis for its activity and growth.

Explanation:

hope this helps!

Answer:

atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom. definition for science.

Explanation:

important part of an object, movement, or group

The diagram shows a homemade car being pushed with a force of 25 N. The force causes the car to move at a constant speed of 3 m/s2. What will happen if the force is changed to 35 N?

Answers

Answer:

The acceleration of the car will increase drastically

Explanation:

Based on newtons second law of motion, the force applied on a body is directly proportional to the product of its mass and acceleration;

     Force  = mass x acceleration

Since the mass of the car is constant, an increase in force will cause an increase in acceleration.

A decrease in the force will impact a lesser acceleration on the motor car.

This way, the change in velocity of the body per unit of time will increase drastically.

Which set of characteristics accurately describes the physical properties of electrons in atoms
A negatively charged particle with very little mass
B negatively charged with a mess similar to a proton
C positively charged particle with very little mass
D neutral particle With a mass similar to a proton

Answers

Answer: Option (A) is the correct answer.

Explanation:

When there occurs no change in the chemical composition of a substance then it is known as physical property.

For example, mass, volume, density are all physical properties.

Since, the mass of an electron is negligible and an electron holds a negative charge.

Therefore, negatively charged particle with very little mass accurately describes the physical properties of electrons in atoms.

1. The forks shown are made of silver (Ag). Some of the silver forks
shown have lost their luster—they have become tarnished. This is an
example of Type here.

Pleasee help

Answers

Answer:

Corrosion

Explanation:

Silver is known as a noble metal. Noble metals are those metals that are resistant to corrosion.

However, we can not say that silver is completely resistant to corrosion because silver can corrode when exposed to air and sulphur.

Exposure to air and  sulphur leads to the coating of the silver with a sulphide layer thereby making the metal to become tarnished and loose its metallic luster.

A scientist named J. J. Thomson developed a model of the atom in which electrons are spread throughout a cloud of positive charge. Which discovery directly caused scientists to revise this model?

Answers

Answer:

A small mass of positive charge was discovered in the center of the atom.

Explanation:

Atoms is the combination of protons, neutrons, as well as electrons particles. The particles that are in the centre of atom is Protons and neutrons, which made up the nucleus, this nucleus is surrounded by electron.

The discovery that directly caused scientists to revise this model of the atom is that A small mass of positive charge known as proton, and a positive charge particle was discovered by Ernest Rutherford, in the center of the atom in the year 1900. Ernest Rutherford through his research resulted to splitting of the atom during nuclear reaction and proton was discovered.

How many grams are in 0.40 mole of NaBH4?

Answers

Answer:

The answer is 158.033949. I assume you are converting between grams KMnO4 and mole.

Explanation:

Which of the following chemical equations is balanced?
а) 4Fe +302 → 2Fe2O3
b) 3Fe +302 + 3Fe2O3
c) 2Fe + 02 → Fe2O3
d) 4Fe + 202 + 3Fe2O3

Answers

Answer:

A, 4Fe 3O2 → 2Fe2O3

What is the atomic mass of carbon if it has 6 protons, 8 neutrons, and 6 electrons in it?

Answers

Answer:

14 amu

Explanation:

The atomic mass is equal to the sum of protons and neutrons. There are 6 protons and 8 neutrons. 6+8=14amu

Chemistry Conversion: Convert 3.0099 dumps to wigs. 6375.23 dumps = 1 wig Round your answer to 5 sig figs. dumps and wigs is not a real unit just used for example.

Answers

Answer:

There are 0.00047212 wig in 3.0099 dumps.

Explanation:

In this problem, we need to convert 3.0099 dumps to wigs.

6375.23 dumps = 1 wig (given)

1 dump = (1/6375.23) wig

To convert 3.0099 dumps to wigs, multiply 3.0099 by (1/6375.23).

3.0099 dumps = [tex]\dfrac{1}{6375.23}\cdot3.0099[/tex]

= 0.00047 wig

Hence, there are 0.00047212 wig in 3.0099 dumps.

Which best describes the Group 1 metals?
a) hard or soft?
b) high density or low density?
c) high melting point or low melting point?
d) reactive or unreactive, with water?​

Answers

Answer:

a) Soft

b) low density

c) low melting point

d)reactive with water

Besides surface area
and rock composition,
what is the third main
factor in determining
how rock is affected
by weathering?
A weight
B. color
C Climate
D. density

Answers

Answer:

A

Explanation:

Besides surface area and rock composition, the climate is the third main factor in determining how rock is affected by weathering. Therefore, option (C) is correct.

What is weathering?

Weathering can be described as the deterioration of rocks, soils, and minerals through contact with water, gases, and biological organisms. Weathering takes place in situ and is distinct from erosion, which includes the transport of rocks and minerals by agents such as snow, water, ice, wind, waves, and gravity.

Weathering is divided into physical weathering and chemical weathering. Physical weathering includes the breakdown of rocks and soils through the mechanical effects of ice, heat, water, or other agents.

Chemical weathering includes the chemical reaction of water, gases, and biologically formed chemicals with rocks and soils. The materials left after the rock breaks combine with organic matter to form soil.

Many landforms and landscapes on the surface of the earth are the results of weathering processes.

Learn more about weathering, here:

https://brainly.com/question/14426457

#SPJ2

Smallest particle which possesses the properties of compound called ​

Answers

Answer:

Molecule

Explanation:

Answer:

molecule

Explanation:

............

Which element has 7 valence electrons and 3 electron shells?

Answers

It’s halogens. Hope this helps ((:

It snows one inch of snow. Snow is ice. There is now 1 inch of snow on your car and 1 inch of snow on your wooden deck. The sun comes out and all the snow begins to melt. Which melts first? [Assume both get equal amounts of sunlight] *

Answers

The snow on the car?

The overall force acting on an object after all the forces are combined is _________
force?

Answers

Answer:

Hi... Your answer is total force

Select the correct answer. Which statement best describes how chemical equations demonstrate conservation of mass? OA The number of reactants is the same as the number of products. B. The compounds are the same on each side of the reaction. OC. The number of atoms of each element is the same on each side of the equation. OD. The state of matter is the same on each side of the equation.​

Answers

Answer: C. The number of atoms of each element is the same on each side of the equation.

Explanation:

The Law of Conservation of Matter shows that it is not possible for matter to either be created nor for it to be destroyed so the number of atoms of each element on the reactant side of the equation must equal the number of atoms in each element on the product side of the equation.

This is why the following equation is incomplete:

H₂ + O₂ ⇒ H₂O

The oxygen atoms are not the same on either side.

Equation will therefor have to be balanced which will make it:

2H₂ + O₂ ⇒ 2H₂O

Notice now that atoms are the same on both sides.

25 cm3 of 0.2 mol / dm3 sodium hydroxide (NaOH) neutralises 10 cm3 of dilute sulfuric
acid (H2SO4). What is the concentration of the sulfuric acid?

Answers

Answer:

too simple question i don't have book pen now otherwise solved it

Which of the following is a characteristic of reliable scientific study? (5
points)

Answers

Answer:I need the options

Explanation:

Why are bubbles and color changes not always chemical change?

Answers

The formation of a gas is a clue to chemical changes. The bubbles of gas that you observed form when an antacid is dropped into water is an example of change. Another clue that a chemical change has occurred is the formation of a solid.
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