What is the mass in grams of o.0135
mol of the element sodium, Na?

Answers

Answer 1

Answer:

0.311g

Explanation:

n= m

M

where n is moles

m is mass of substance

M is molar mass

Mn = m

0.0135×23=m

0.311=m


Related Questions

Which waves have the highest frequencies?
A. microwaves
B.UV
C. waves with the lowest energy
D. waves with the highest energy

Answers

Answer:

D. Waves with the highest energy

Explanation:

The more energy the higher the frequency. More specifically there will be more energy per photon.

Microwaves are on the low end of the electromagnetic spectrum while UV is higher but there are more waves with more energy such as gamma rays.

25 cm of liquid 'A' and 20 cm of liquid
'B' are mixed at 25°C and the volume of
solution was measured to be 44.8 cm3
then correct reaction is
(A) A Hmix = 0, solution shows
ideal

Answers

Answer:

The correct option is;

(B) [tex]\Delta H_{mix} < 0[/tex], solution shows negative deviation

Explanation:

The given parameters are;

The available volume of liquid A = 25 cm³

The available volume of liquid B = 20 cm³

The volume of the solution (mixture) = 44.8 cm³

Therefore, we have;

[tex]\Delta _{mix} V < 0[/tex]

Which is one of the prerequisite for the formation of negative deviation

When a non-ideal solution shows negative deviation according to Raoult's Law, we have;

[tex]\Delta _{mix} H < 0[/tex], we have more heat released due to new molecular interactions.

What is the volume of kristas rock

Answers

Answer : The volume of kristas rock is 30 mL.

Explanation :

From the given image we conclude that:

Initial volume of liquid = 150 mL

Final volume of liquid = 180 mL

Now we have to determine the volume of kristas rock.

Volume of kristas rock = Final volume of liquid - Initial volume of liquid

Volume of kristas rock = 180 mL - 150 mL

Volume of kristas rock = 30 mL

Therefore, the volume of kristas rock is 30 mL.

А. B
Which of the following is true about the picture above? What would it be?

Answers

Answer:

Container A is a solution and Container B is a colloid.

Explanation:

Container A is a solution as the tyndall efffect is not present. You cannot see the light bean through the glass.

Container B is a suspension or a colloid as you can see the beam through the glass.

The first option proposes Container A is a colloid...this is not correct

The third option is not true as the tyndall effect is only displayed in container B

The fourth option is not correct the tyndall effect is not present in container A meaning it would not be a suspension or a colloid and you can see the tyndall effect in container B indicating its not a solution

what are the units for the volume of a solid volume of a liquid ​

Answers

Answer:Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.

Explanation:

Dilute hydrochloric acid reacts with sodium

2HCl(aq) + Na2CO3(aq) + 2NaCl(aq) + H2O(l) + CO2(g)

A Explain why effervescence is seen during the reaction.

Answers

Answer:

Because the reaction releases CO2 gas

Explanation:

therefore creating an effervecence within the solution as the carbonate dissociates

which molecule or ion has a linear shape?
a. BeCl2
b. PH3
c. ClO4-
d. PCl5​

Answers

Answer:

bec12 is it.one or i it is under 180

Using the Periodic Table predict which elements will have similar chemical properties or reactivity.
Group of answer choices

rubidium, yttrium, and zirconium

nitrogen, sulfur, and bromine

magnesium, strontium, and barium

cadmium. calcium, and carbon

Answers

Answer:

magnesium. stronsium. barium. they are have similar group in IIA

What happens to an egg that is not fertilized?
OIt is reabsorbed by the body
O It travels back up the fallopian tube.
OIt exits during childbirth.
O It is released during menstruation​

Answers

Answer:

D.  It is released during menstruation

Explanation:

The egg that is not fertilized is  released during  the process of menstruation​.

What is menstruation?

Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone levels and is a sign that pregnancy has not occurred.

The first period, a point in time known as menarche, usually begins between the ages of 12 and 15.Menstruation starting as young as 8 years would still be considered normal.The average age of the first period is generally later in the developing world, and earlier in the developed world. The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women. In adults, the range is between 21 and 31 days with the average being 28 days.

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what turns colour in an acid and base

Answers

Answer:

Chemists use a solution called Universal Indicator to identify acids and bases. ... The Universal Indicator Color Guide shows that Universal Indicator turns red when it is added to a strong acid, it turns purple when it is added to a strong base, and it turns a yellowish-green when it is added to a neutral solution.

Explanation:

Answer:

Phenolphthalein

Explanation:

how many picoliters are in 3.16 mL

Answers

Answer:

3.16×10⁹ pL

Explanation:

Given data:

Volume in mL = 3.16

Volume in picoliters = ?

Solution:

Picoliter and milliliters are units of volume. Milliliter is greater unit than picoliter.

1 mL = 10⁹ pL

Now we will convert the 3.16 mL into pL.

3.16 mL × 10⁹ pL/ 1 mL

3.16×10⁹ pL

Stan gets frustrated while working on his math homework, and he tears his paper into several pieces. What kind of change has his
paper gone through?

Answers

Answer:

Physical Change

Explanation:

What is a physical change? A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.

what is the median number of 69,64,63,66?

Answers

the answer is 67.5. hope this helps
65

First put them in order from least to greatest. Then remove outer numbers. You are then left with 64 and 66. The number in the middle of 64 and 66 is 65.

What is Mercury's proximity to the sun

Answers

Answer:

46.943 million km

Explanation:

From an average distance of 36 million miles (58 million kilometers), Mercury is 0.4 astronomical units away from the Sun.

Answer:

29.169 million miles

Explanation:

From an average distance of 36 million miles(58 million kilometers,Mercury is 0.4 astronomical units away from the sun.

Which tissues and organs belong to the Musculoskeletal System?​

Answers

It is made up of the bones of the skeleton, muscles, cartilage, tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together. The musculoskeletal system's primary functions include supporting the body, allowing motion, and protecting vital organs.
skeleton, muscles, cartilage, tendons, ligaments, joints ect.

round 2 significant figures. 5,239

Answers

Answer:

5200

Explanation:

Quick
Choch
Place each description in the correct category.
represented by symbols
Elements
Compounds
made of one type of atom
represented by formulas
cannot be broken down
can be chemically broken down
made of two or more types of atoms

Answers

Answer:

a i believe

Explanation:

a

Not all protists use flagella or cilia to move. Give an example of another way protists move and identify the type of protist that uses that mode of movement.​

Answers

Answer: One of the most striking features of many protist species is the presence of some type of locomotory organelle, easily visible under a light microscope. A few forms can move by gliding or floating, although the vast majority move by means of “whips” or small “hairs” known as flagella or cilia, respectively. (Those organelles give their names to informal groups—flagellates and ciliates—of protists.) A lesser number of protists employ pseudopodia. Those same organelles may be used in feeding as well.

Explanation:

what is a well-tested, explanation that unifies a broad range of observations and hypotheses

Answers

Scientific theory is that

How does the atomic radii trend explain the electronegativity trend?

Answers

Answer: electronegativity decreases.

Explanation: This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

How are electrically neutral atoms different than they form

Answers

A normal atom has a neutral charge with equal numbers of positive and negative particles. That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons.

An atom is said to be electrically neutral if it has an equal amount of protons and electrons. On the other hand, an atom is electrically charged if its protons and electrons are not distributed evenly.

What are neutral atoms?

Neutral atoms are defined as when an atom has an equal amount of protons and electrons, it also has an equal number of electric charges, both positive and negative. As a result, every element in the periodic table has a neutral atomic structure.

Normal atoms have an equal amount of positive and negative particles and a neutral charge. Accordingly, an atom with a neutral charge is one in which the atomic number is matched by the number of electrons.

Thus, an atom is said to be electrically neutral if it has an equal amount of protons and electrons. On the other hand, an atom is electrically charged if its protons and electrons are not distributed evenly.

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5. The diagram above shows what happened when an irregular solid was immersed in water. This irregular solid has the same mass as a gold block, which is 2 cm wide by 2 cm high by 5 cm long. Using the method described in the passage, compare the density of the unknown with the density of gold.
A. Equal to gold
B. Less than gold
C. Greater than gold
D. Cannot be determined​

Answers

The answer is going to be C hope this helps please make me a Brainly

The density of the unknown will be greater than the density of gold.

An overview will be given since the diagram isn't given. The formula to calculate the density of an irregular shape will be the mass divided by the volume.

The density is the mass per volume. From the information given, since they've the same mass, then it means that the volume of the gold will be more than the volume of the unknown. Therefore, the density of the unknown will be greater than gold.

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The protons and neutrons are in the nucleus of the atom, while the electrons are on the outside. How would you calculate the number of neutrons in an atom? Subtract the atomic mass and the atomic number. Add the atomic mass and the atomic number. Subtract the number of protons from the atomic number. Add the number of protons to the atomic number. ​

Answers

Yes.....................

How does Newton’s laws explain motion

Answers

Explanation:

Newton's second law is a quantitative description of the changes that a force can produce on the motion of a body. It states that the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.

Material
Specific Heat
(J/gºC)
Use this chart showing the different specific heat of
various materials to answer the questions.
Which material has the highest specific heat? waterv
Which material has the lowest specific heat?
Which material has the ability to absorb twice as much
heat as aluminum when placed in the same
environment of mass and temperature?
aluminum
0.90
iron
0.44
lead
0.16
sand
0.83
steel
0.49
wood
1.80
water
4.18
) Intro
Done
6 of 9

Answers

Answer:

1. C

2. A

3. B

Explanation:

I took the Assignment

The material with highest specific heat is water.

The material with lowest specific heat is lead.

The material that has the ability to absorb twice as much heat as aluminium is wood.

What is specific heat? Specific heat is the quantity of heat that are required to raise the temperature of one gram of a substance by one Celsius degree. The units of specific heat are usually calories or joules per gram per Celsius degree.

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When coal is burned, sulfur is released into the air, where it reacts with oxygen to produce sulfur dioxide and sulfur trioxide. Which of the following is true of this process?

A. The identity of each reactant remains the same.
B.Sulfur dioxide and sulfur trioxide are the reactants in this change.
C.The products have different chemical properties than those of the reactants.
D. The products contain more sulfur atoms and fewer oxygen atoms than the reactants.

Answers

Answer:

c

Explanation

they have different properties now

Answer will be ‘C’. The products have different chemical properties than those of the reactants.

What is the mass in grams of each of the following?
a. 2.50 mol of sulfur, S
b. 1.80 mol of calcium, Ca
c. 0.50 mol of carbon, C
d. 3.20 mol of copper, Cu

Answers

a) 80

b) 36

c)6

d)64

All in grams

the formula ; n= m

M

was used .

where n is moles

m is mass of a substance

M is molar mass

The mass of the substance is the product of the moles and the molar mass. The mass of sulfur = 80 gm, calcium = 72 gm, carbon = 6 gm, and copper = 201.6 gm.

What is mass?

Mass of any substance is the amount of the constituent particle it holds together and can be measured in grams. The mass has been calculated from the moles of the substance and its molar mass.

The mass of sulfur is calculated as,

Mass = moles × molar mass

= 2.50 mol × 32 g/mol

= 80 gms

The mass of calcium is calculated as,

Mass = moles × molar mass

= 1.80 mol × 40 g/mol

= 72 gms

The mass of carbon is calculated as,

Mass = moles × molar mass

= 0.50 mol × 12 g/mol

= 6 gms

The mass of copper is calculated as,

Mass = moles × molar mass

= 3.20 mol × 63 g/mol

= 201.6 gms

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What is the picture displayed?
Proton , atom , element, cell

Answers

Answer:

I can't see the picture so I can't answer

5. Aidan is on a carnping trip with his family. As the temperature decreases
Aidan suggests building a campfire. Which of the following explains why
heat moves from the campfire to the people sitting around it? *

Answers

Answer:

Because heat flows from warmer objects to cooler objects

Explanation:

The letters ROYGBIV represent the colors of visible light. Arrange them in order of:
Increasing energy

Answers

Visible and Ultraviolet Spectroscopy

Violet: 400 - 420 nm.

Indigo: 420 - 440 nm.

Blue: 440 - 490 nm.

Green: 490 - 570 nm.

Yellow: 570 - 585 nm.

Orange: 585 - 620 nm.

Red: 620 - 780 nm.

Hope this helps
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