perience
How many significant figures does each of the following numbers contain?
11. 163.890
12. 00560
13. 156, 100
14. 906,301
15. 6.022 x1023
16. 5.60 x 10-5
Dorform the fol

Answers

Answer 1

Answer:

11

Explanation:


Related Questions

True or False: Neutrons have both a positive and negative charge

Answers

Answer:

false

Explanation:

Answer:

false

Explanation:

The movement of air caused by differences in air pressure is __________________.

Answers

Answer:

wind

Explanation:

it would be naturally caused by the pressure

Answer:

temperature or pressure differences

Explanation:

The independent variable is the variable that you measure.
True or False?

Answers

Answer:

Maybe false

Explanation:

.........

An atom of an element has 2 electrons in the 1st energy level and 5 on the 2nd energy level what element is it ?

Answers

the element is nitrogen

5+2=7

What is the best explanation of an organelle?

Answers

An organelle is a structure within the cytoplasm of a eukaryotic cell that is enclosed within a membrane and performs a specific job. Although ribosomes are not enclosed within a membrane, they are still commonly referred to as organelles in eukaryotic cells.

Answer: A organelle is a structure within the cytoplasm of a eukaryotic cell that is enclosed within a membrane and performs a specific job and although ribosomes are not enclosed within a membrane, they are still commonly referred to as organelles in eukaryotic cells.

Find the density of a 720.0 g block of Titanium with these dimensions: L = 10.0 cm, W = 8.0 cm, H = 2.0 cm

Answers


D=m/V=0.72/0.1x0.08x0.02=4500(kg/m3)

please show the work :(What is the estimated force applied to the box if the acceleration is .40 m/s2?

force (N) acceleration (m/s2)
10 .20

? .40​

Answers

Answer:

20N

Explanation:

Given parameters:

        Force(N)     Acceleration(m/s²)  

            10                   0.2

           ?                      0.4

Unknown:

The force applied when the acceleration is 0.4m/s²

Solution:

From newton's second law of motion;

 Force = mass x acceleration

 Since we are using the same box, let us find the mass of the box;

      Force  = mass x acceleration

         10 = mass x 0.2

            mass = [tex]\frac{10}{0.2}[/tex]  = 50kg

Now,

 The force in the second instance will be;

      Force  = 50 x 0.4  = 20N

Select all that apply. Choose the chemical formulas that are matched with their
correct name.


MgF2, magnesium (II) fluoride

BeO, beryllium oxide

NaCl, sodium chloride

AlF3, aluminum trifluoride

CaCl2, calcium chloride

Answers

Answer:

i think just these

NaCl

CaCl2

List the following particles in size order, from biggest to smallest?
A Molecules, electrons, atoms incorrect answer
B Atoms, molecules, electrons incorrect answer
C Electrons, atoms, molecules incorrect answer
D Molecules, atoms, electrons

Answers

Answer:

D. Molecules, atoms, electrons.

Explanation:

I did a quiz on this and got it right

Answer:

D. Molecules, atoms, electrons.

Explanation:

i did the test trust i got it right

Microwave warming Popcorn is a  example of

A. Conduction
B. Convection
C. Radiation
D. None of these

Answers

Answer:

A

Explanation:

Ttu67j5ri76tio5777t65y75ircyjutfjgtfv

What mass of NO2 can be produced when 678 mL of oxygen at STP and 256 grams of NH3 are mixed together?

Answers

Answer:

WHT55

Explanation:

i experianced this before

Why do atoms form bonds with other atoms?
SELECT ALL THAT APPLY
a
To ensure that both atoms in the bond have eight total
electrons.
b To obey the octet rule.
С
To fill the outer electron shells of both atoms.
d
To achieve a more stable electron configuration for both
atoms.

Answers

c i believe if not i am sorry

The smallest unit that combines chemically or physically to form molecules and compounds is called an atom. They are composed of electrons and protons and neutrons in the nucleus.

The correct answer is:

Option d. To achieve a more stable electron configuration for both atoms.

This can be explained as:

Atoms do not always bond to complete eight electrons in their shells.

Atoms do not react to follow the octet rule.

Electrons don't need to be filled in the shells of atoms of both the shells as some atoms lose electrons too.

Therefore to achieve stable configuration atoms bond with other atoms.

To learn more about atoms and stability follow the link:

https://brainly.com/question/7615695

¿Por qué un trozo de sal común es frágil y se puede romper fácilmente cuando se le somete a una fuerza y no ocurre lo mismo con un trozo de metal que se deforma antes de romperse?

Answers

Answer:

Explanation:

La sal común es un compuesto iónico, es decir que sus átomos (Na y Cl) están unidos entre sí por fuerzas electrostáticas, y el metal está unido entre sí por uniones metálicas. La naturaleza de estas uniones es diferente y en base a las fuerzas de atracción que hay entre los átomos en compuestos con este tipo de uniones, la propiedades físicas generales serán diferentes.

En el caso de los metales, los átomos metálicos están colocados unos sobre otros de forma ordenada, pero no fijamente retenida, y los electrones de valencia están delocalizados a través de todo el cristal metálico. Por esta razón, cuando se le aplica una fuerza a un metal, estos átomos pueden deslizarse unos sobre otros. Ésta es la propiedad que le da a los metales su maleabilidad.

En el caso de los compuestos iónicos, los aniones y cationes que lo componen están ordenados en el cristal de una forma más rígida y por eso cuando se les aplica una fuerza éstos compuestos se rompen mucho más fácil, ya que no pueden deformarse.

When is the potential energy transformed into kinetic energy?

Answers

When it is in motion, i.e no longer stopped

Explanation:

If a ball is lifted to a certain height, it gains potential energy. If it is then dropped, the potential energy is converted into kinetic energy as it looses height but gains speed.

It is transformed when it is moving

Ayala is making salad dressing. She mixes oil and
vinegar in a blender until a smooth consistency is
formed. Explain whether this is a heterogeneous or a
homogeneous mixture and why.

Answers

Answer:

A heterogeneous mixture

Explanation:

A heterogeneous mixture is a mixture that is not uniform in composition. This means that we can tell that there is more than one component in the mixture. An example of a heterogeneous mixture would be milk and cereal.

The opposite is a homogeneous mixture, which is uniform in composition. An example of a homogeneous mixture is air. There are many different particles surrounding us, but we can't tell.

A salad dressing that consists of oil and vinegar is another example of a heterogeneous mixture. Its consistency is smooth, but oil and vinegar can't dissolve each other, which means that we will see droplets of oil and vinegar. Since we can tell that it contains these components, this is a heterogeneous mixture.

Answer:

Sample Response: A homogeneous mixture can only form when one of the substances can dissolve the other one. Oil and water cannot dissolve each other, so they must form a heterogeneous mixture with small particles of vinegar dispersed throughout the oil, yet not dissolved.

when a substance melts the kinetic energy

A Decreases then increase

B Decrease

C Stays the same

D Increase

Answers

Answer:

C stays The same.

Is the answer.

Answer = C

the overall kinetic energy level between the two substances actually remains the same

How do you separate a mixture?

Answers

Answer:

We can seperate a mixture by various methods

Explanation:

Distillation, Evaporation, filtration and chromatography

PLEASE HELP!!!!!! SpongeBob Scientific Method Practice

Mr. Krabbs wants to make Bikini Bottoms a nicer place to live. He has created a

new sauce that he thinks will reduce the amount of bodily gas that comes out after

eating krabby patties from the Krusty Krab. He brings in 100 customers that

always have gas problems. He has 50 of them (Group A) eat krabby patties with

the new "Gas-free" sauce. The other 50 (Group B) eat krabby patties with sauce

that looks just like the Gas-free sauce but is really the old sauce with food

coloring. Both groups were told that they were getting Gas-free sauce. Two

hours after eating the krabby patties, 30 customers in Group A reported having fewer

gas problems and 2 customers in Group B reported having fewer gas problems.

I

1. What is Krusty Krab's hypothesis? Krusty Krab's hypothesis is that he thinks his

new sauce will reduce the amount of bodily gas that comes out after eatin

Answers

Answer:

The hypothesis is that the new sauce used in hamburgers will be able to reduce the incidence of body gases in customers.

Explanation:

A hypothesis is an assumption about a specific topic that is being researched. In the case shown in the question above, Krusty Krab believes that the new sauce he wants to use in hamburgers is capable of reducing the amount of body gases created by the body. Krusty Krab wanted to do scientific research where he analyzed the efficiency of this new sauce, but he assumes that the new sauce is efficient in reducing the creation of these gases. This is a hypothesis.

A 2.9 kg model rocket accelerates at 15.3 m/s2 with a force of 44 N. Before launch, the model rocket was not moving. After the solid rocket engine ignited, hot gases were pushed out from the rocket engine nozzle and propelled the rocket toward the sky.

Which of Newton’s laws apply in this example? Check all that apply.

Answers

Answer:

newton's firts law

Explanation:

because it states that everybody continue its state in rest unless an external force is appy to change its state from rest to motion.

Answer:

A, B, C

Explanation:

which of the following lists show the elements in order, from those having the least protons to those having the most protons in the atoms?

A. K, Mg, N, O
B. C, Al, P, Cl
C. Li, Be, H, He
D. Na, Ne, He, H​

Answers

Answer is b, trust. :)

The elements that have least protons to those having the most protons in the atoms are:

B. C, Al, P, Cl

Protons in an atom:

There is an equal number of protons and electrons in an atom. So when moving across a period in a periodic table the number of electrons increases which also shows the increases in a number of protons. So as the atomic number increases, the number of protons and electrons also increases.

Thus, the order of elements having least to greatest protons are:

C, Al, P, Cl

C has 6 atomic number, Aluminium has 13 atomic number , Phosphorus has 14 atomic number and atomic number of chlorine is 17.

Thus, option B is correct.

Find more information about Atomic number here:

brainly.com/question/1805828

Which property do metalloids share with nonmetals?

Answers

Answer:

Both can react to form acidic compunds. Both are brittle.

Explanation:

The chemical equation represents a reaction between ammonia and oxygen to form nitrogen monoxide and water. 4 N H 3 ( g ) + 5 O 2 ( g ) → 4 NO ( g ) + 6 H 2 O ( g ) What is the limiting reagent when a 4.50 g sample of ammonia is mixed with 15.80 g of oxygen?

Answers

The limiting reagent : NH₃

Further explanation

A method that can be used to find limiting reactants is to divide the number of moles of known substances by their respective coefficients, and small or exhausted reactants become a limiting reactant

Reaction

4NH₃(g)+5O₂(g)⇒4NO(g)+6H₂O(g)

mol NH₃ :

[tex]\tt \dfrac{4.5}{17}=0.265[/tex]

mol O₂ :

[tex]\tt \dfrac{15.8}{32}=0.494[/tex]

mol ratio

NH₃ :

[tex]\tt \dfrac{0.265}{4}=0.06625[/tex]

O₂ :

[tex]\tt \dfrac{0.494}{5}=0.0988[/tex]

Limiting reactants : NH₃ (smaller ratio)

The limiting reagent when a 4.50 g sample of ammonia is mixed with 15.80 g of oxygen is NH₃

Calculation of limiting reagent:

The limiting reactant refers to the reactant that gets consumed first in a chemical reaction and thus it limits how much product can be created or developed. A method that can be used to determine limiting reactants that to divide the number of moles by their respective coefficients.

So,

For mol NH₃ :

[tex]= 4.5\div 17[/tex]

= 0.494

For mol O₂ :

[tex]= 15.8 \div 32[/tex]

= 0.494

For mol ratio

NH₃ :

[tex]= 0.265 \div 4[/tex]

= 0.06625

O₂ :

[tex]= 0.494 \div 5[/tex]

= 0.0988

Based on the above calculations we can say that it is NH₃

learn more about the oxygen here: https://brainly.com/question/19803828

WILL MARK YOU BRAINLEIST What do sound waves need to have to travel from one place to another?

What do sound waves need to have to travel from one place to another?

Question 5 options:

steel


water


air


a medium

Answers

THE ANSWER ABOVE IS INCORRECT!! The right answer would be a medium!

Answer:

a medium!!!!

Explanation:

ITS CORRECT!!!! I GOT IT RIGHT ON MY TESTTTTT! I PROMISEEE

help me out plz!!!!​

Answers

I don’t see a problem anywhere

how to write the ionic formula for the K1+, MnO41- pair of ions

Answers

Answer:

Ionic formula: KMnO4

Explanation:

Pottasium permanganate (KMnO4) is an ionic compound that contains a combination of pottasium cations (K+) and permanganate anion (MnO4-). The pair of ions that make up the ionic compound cancel out each other to make it neutral.

K+ (aq) + MnO4- (aq) → KMnO4 (aq)

MnO4- contains 1 atom of manganese with a (+7) charge and four atoms of oxygen with a (-2) charge each. This forms a +7 for Mn and -8 for O4, hence, a net total of -1.

I need someones help

Answers

Answer:

y or z one of those two i think its z but im so sorry if im wrong if not z then try y also I learned this last year.

I need help with the bottom part of the paper

Answers

Answer:

ur really pretty :)

Explanation:

What Most Often Causes The Availability Of Water To Change?
A. type of plants
B. type of soil
C. local geography

Answers

Answer:the answer is C

Explanation:


Which gas is made from more than one element?

Answers

water, carbon, dioxide and methane

Here is a model of the sun earth system at a certain point in earths orbit around the sun based on the model which statement best explains my point is is experiencing summer

Answers

Answer:

the earth is tilted towards the sun

Explanation:

In the context, there is a sun and earth system and at a certain point when the earth is moving in its orbit around he sun, some point on the earth experiences the summers season. This is because at this point of the earths revolution, the point on the earth is facing the sun and is also tilted towards the sun. So at this point the sun rays fall directly at the surface. While the place which is tilted away from the sun, experiences winter season.

Answer:

Earth's northern hemisphere is tilted toward the Sun.

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