Solve the following problem with the correct number of significant figures.

5.31 cm + 8.4 cm + 7.932 cm

Multiple choice question.

A)
22 cm

B)
21.6 cm

C)
21.642 cm

D)
21.64 cm

Answers

Answer 1
Add them all up and you’ll get ur answer

Related Questions

_C3H602 + _ 02 → _ CO2 +_ H20
balance the equation

Answers

Answer:

balanced plz give correct question

In the above figure, what type of bond is formed?



metallic


ionic


covalent


nonpolar

Answers

The answer is Ionic bond

Answer:

It is an covalent bond.

Explanation: The bond is covalent because all the dots are equaled to each other therefore creating a stable bond. When the bonded atoms have a lower total energy than that of widely separated atoms, a covalent bond forms. The electrons are not moved from one atom to the other in polar covalent bonds, such as that between hydrogen and oxygen atoms, as they are in an ionic bond.

What do molecules put together form?
In other terms what do you call a molecule that is put together with another molecule to form a what?​

Answers


Molecule add molecule is a compound

002 (part 1 of 2) 10.0 points For :393 g of butadiene (C,11,) calculate the number of moles. Answer in units of mol.

Answers

Answer:

7.27 mol C4H6

Explanation:

To calculate moles, divide the molar mass by the grams given

To find molar mass, add the atomic mass of the elements

12.011*4 + 1.008*6 = 54.092 g/mol

393 g * 1 mol/54.092 g = 7.265 mol

Imagine disease kills 85 percent of the wolf population. How will it affect the other organisms?

Answers

Answer:

There would most likely be an overpopulation of the animals the wolfs ate.

Explanation:

Answer:

Many populations will grow way to much. Also others will drop in numbers drastically.

Explanation:

Due to the fact that wolves are predators, the prey they eat will grow 85% more. Now, 85% of the wolf population dies, that`s a lot of prey not eaten. Then the prey that are predators to other animals who are over hunted by their predators will most likely drop in numbers drastically, by I mean 85%. This will throw the ecosystem off so much, humans could be at grave risk.

if you need some points and are good at science help!

Answers

Answer:

region 2 and region 3

Explanation:

you can tell by the color of the land my friends^^

Answer:

2, 3 They are closest to the equator, and the equator marks to hottest places on earth.

Explanation:

I hope this helps you.

If two brown rabbits with the same alleles (BB and BB) are bred, then all of their offspring will have the same alleles (BB)
would it be trust or false ?

Answers

Answer:

true

Explanation:

there is no other combination of alleles that would change the offsprings

How would the reactivity of an element with one valence electron vary from an element with 8 valence electrons

Answers

Answer:

An element with 1only one valence electron is extremely reactive while an element with 8 valence electrons is very stable and does not react most of the times

Explanation:

Valency is the number of electrons in the outermost shell of the atom. It shows the ease with which elements react and combine with each other.

An element can take a maximum of 8 electrons in most of its outermost shells. As a matter of fact, the goal for its stability is to attain a structure with all 8 slots for electrons in its outer shell filled up. The element can either do this by adding or removing electrons.

The ease with which it adds or removes the electrons shows its reactivity. If it has only one electron to lose, (the valence electron) the element will be very reactive because this is relatively easier to do when compared with 2 electrons, three electrons,  and so on. An element with 8 electrons in its outer shell is very stable and does not need to react anymore. an example of this is Neon and Argon.

Pls help me with this question:As a result of this process offspring 1 and offspring 2 will have?

A.the same number of genes but different traits
B.a different number of genes but the same traits
C.the same number of genes and the same traits
D.a different number of genes and different traits

Answers

Answer:

I believe it’s C

Explanation:

I used Socratic and found a quizlet lol

The organism is reproducing asexually. Hence both offspring has the same number of genes and same traits.

What is asexual reproduction?

Asexual reproduction allows for the rapid production of vast numbers of children by a single person. Asexual reproduction is a successful method of reproduction in a stable or predictable environment since all the children will be suited to that environment.

Asexually reproducing organisms may be at a disadvantage in an unstable or unpredictable environment since all of the progeny are genetically similar and might not have the genetic diversity to survive in new or changing settings.

Therefore, the given diagram describes the reproduction of an organism by asexual method and giving offsprings of same number of genes and same traits. Hence, option C is correct.

Find more on asexual reproduction:

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One day on her walk home from school, Leann noticed some rust on an old car.

She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts found on the left side of the equation below?

4 Fe + 3O2 → 2Fe2O3

Answers

Answer:

Iron and Oxygen

Explanation:

Fe is Iron and O2 is Oxygen

Hold the slides for observation

Answers

What is this

Explanation

Cells are the basic units of
A. science
B. atoms
C. life

Answers

Answer:

C

Explanation:

Read it from my 8th grade text book a few years back.

Answer:

C   l i f e

Explanation:

Which has the most effect on tides? *
2 points
Moon
Sun
Earthquakes
Wind
Submit

Answers

The answer would be ~moon~
Because tides are caused by the gravitational force and pull of the moon

Hope this helps

Have a great day/night
i agree that the person who said the moon is indeed correct

How well do you think scientists can predict where a volcano will erupt? How well do you think scientists can predict when a volcano will erupt? Explain.

Answers

Answer:

Volcanologists can predict eruptions if they have a thorough understanding of a volcano's eruptive history, if they can install the proper instrumentation on a volcano well in advance of an eruption, and if they can continuously monitor and adequately interpret data coming from that equipment.

Explanation:

Abel was running a fever of 107 degrees Fahrenheit, what was her temperature in degrees
Celsius?

Answers

Explanation:

we know the formula to convert farenheit to Celsius

=(F-32)(5/9)

=(107-32)(5/9)

(5/9)=375/9= 41.6 degrees Celsius

During spontaneous fission, a nucleus of 25498Cf can produce 11846Pd, four neutrons, and what other nuclide?

Answers

Answer: 52Te - Tellurium

Explanation: Radioactivity occurs when an unstable nucleus of an element decompose into a stable element by emitting particles or forms of eletromagnetic energy. There are types of radioactivity and Spontaneous Fission is one of them.

In Spontaneous Fission, the unstable, also called parent, nucleus splits into two smaller nuclei and emitts one or more neutrons.

The reaction spontaneous fission of Cf is represented below.

25498Cf ⇒ 11846Pd + 4n + X

The characteristics of each element of the equation are:

1) The element Cf has atomic mass 254 and atomic number 98.

2) Element Pd has atomic mass 118 and atomic number 46.

3) Neutron is represented as n, has no atomic number and atomic mass 1.

Given these properties, to determine the other nuclide, we have to find out the nuclide's atomic number, as each element in the periodic table has its own atomic number.

At the left side of the equation, atomic number is 98. At the right side, element X's atomic number is

98 - 46 + 0 = 52

In the periodic table, the element with atomic number 52 is Tellurium, whose symbol is Te.

The other nuclide for the spontaneous fission is Tellurium (Te).

Sodium, Calcium, and Mercury are all examples of
a. metals
b. non metals
C. metalloids
D. none of the above

Answers

Answer:

c

Explanation:

Answer:

None of the above

Explanation:

Mercury is a planet of the 8 planets, Sodium is a mineral that occurs naturally in foods or is added during manufacturing - or both. Naturally occurring sodium is in foods such as celery, beets and milk. Packaged and prepared foods can be big sodium culprits, AND Calcium is a mineral that is necessary for life. In addition to building bones and keeping them healthy, calcium enables our blood to clot, our muscles to contract, and our heart to beat. About 99% of the calcium in our bodies is in our bones and teeth.

1. Name the elements with the following symbols

a. Na
b. H
c. C
d. O

2. What is the symbol for the following elements?

a. Helium
b. Sulfur
c. Copper
d. Lead

Answers

Answer:

1.

a. Sodium

b.Hydrogen

c Carbon

d Oxygen

2.

a He

b S

c Cu

d Pb

Answer:

1.

a. Sodium

b.Hydrogen

c Carbon

d Oxygen

2.

a He

b S

c Cu

d Pb

Explanation:

Hope this will help

4) Complete the following statement: Different elements...
A) Must have a mass number of at least 18.
B) Have more electrons than protons.
C) Have the same number of protons.
D) Have different numbers or protons.

Answers

Have a different number of protons
D.) Have different numbers of protons.

What are the 2 basic parts of an atom?

Answers

Answer:

nucleus and electrons

Explanation:

nucleus contains protons and neutrons

An atom is composed of two regions: the nucleus, which is in the center of the atom and contains protons and neutrons, and the outer region of the atom, which holds its electrons in orbit around the nucleus.

For each problem listed in Column A, select from Column B the letter of the conversion factor that is needed to solve the problem. You may need to use more than one conversion factor to solve the problem.

Answers

kdjwsnakjNAdskjndkjnknjfdskjnfjkngdjknfjkgskjdgjkndfsjknd

When are ionic compounds good conductors of electricity?
A.as solids
B.never
C.as both liquids and solids
D.As liquids

Answers

Answer:

C. as both liquids and solids

Explanation:

The ionic compounds are  good conductors of electricity when they exist as both liquids and solids.

What are ionic compounds?

Ionic compound or electrovalent compound is a type of compound  which is formed between two elements when there is an exchange of electrons which takes place between  the atoms resulting in the formation of ions.

When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge  and forms an ion called the anion.

As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.They are good conductors of electricity of heat, They are hard and brittle and even used as electrolytes.

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Describe the difference between cations represented on group 1/2(red and orange)and those found on the transition metal group(peach)

Answers

Cations have a set positive charge while the charges on transition metals like iron vary


1. The average person inhales an exhales about 2,200 L of O2 a day. How many
moles of oxygen gas is this?

Answers

Answer:4.5 moles

Explanation:

How many moles are there in 17.6g NaOH?

Answers

Answer:

The answer is 39.99711. We assume you are converting between grams NaOH and mole. You can view more details on each measurement unit: molecular weight of NaOH or mol This compound is also known as Sodium Hydroxide.

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.44moles are there in 17.6g NaOH.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. The stoichiometry represents the number of moles.

Mathematically,

number of moles of NaOH =given mass of NaOH÷ molar mass of NaOH

Molar mass of 1 mole of NaOH= 40 g/mol

mass of NaOH=  17.6g

Substituting all the given values in the above equation, we get

number of moles of NaOH = 17.6g ÷  40 g/mol

number of moles of NaOH  =0.44moles

Therefore, 0.44moles are there in 17.6g NaOH.

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How is the Periodic Table helpful to scientists?

Answers

Answer:

Because it helps predict the types of chemical reactions that a particular element is likely to participate in by telling each element's atomic number and usually its atomic weight

Explanation:

the table is useful for modern students and scientists because it helps predict the types of chemical reactions that a particular element is likely to participate in. ... The table tells each element's atomic number and usually its atomic weight. The typical charge of an element is indicated by its group.

Why is it necessary to heat the hydrate gently at first and then more strongly only after most of the water has been driven off

Answers

Answer:

To avoid spattering

Explanation:

If we are heating a hydrate to drive off the water of crystallization, we must initially heat the hydrate gently, at a lower temperature and then more strongly only after most of the water has been driven off in order to to prevent spattering.

Since we obtain the amount of water by the mass difference, Spattering  decreases the mass of water obtained and ultimately results in a lower percent of water being calculated for the hydrate.

Which path shows how gravity causes water to move?

Answers

Answer:

run off

Explanation:

Answer: The answer is stream --> Tributary --> River --> Lake

Draw a physical model that shows the reaction of zinc metal and hydrochloric acid (hydrogen chloride).

Zinc + Hydrochloric Acid Zinc Chloride and Hydrogen Gas
Zn + 2HCI - ZnCl2 + H2

“Be sure to label your model to clearly show how you are representing the atoms, how they are rearranged and
that mass is conserved in the reaction.”

If anyone could maybe send me a drawing it’ll be so appreciated! God bless you all :)

Answers

Answer:

Zinc + Hydrochloric Acid Zinc Chloride and Hydrogen Gas

Zn + 2HCI - ZnCl2 + H2

Explanation:

Be sure to label your model to clearly show how you are representing the atoms

In the ATP cycle, a phosphate group is cut off of

A. ATP to form ADP, absorbing energy.
B. ATP to form ADP, releasing energy.
C. ADP to form ATP, absorbing energy.
D. ADP to form ATP, releasing energy.

Answers

B. ATP to from ATP, Releasing energy

Answer:

B) ATP to form ADP, releasing energy.

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