which two formulas represent compounds?

A.NaCI
B.HCI
C.H2
D.Ag

Answers

Answer 1

Answer: A and B

Explanation: A and b are Sodium chloride and Hydrogen chloride which are both compounds.

Answer 2

Answer: A. NaCI

Explanation: APEX


Related Questions

Is Magnesium less reactive than Aluminum ? Yes or No

Answers

Answer:

The answer is no

Answer:

yes

Explanation:

some metals are reactive than others. Example: (a) Magnesium is more reactive than silver. (b) Magnesium reacts with oxygen but silver doesn't because magnesium is more reactive than silver.

please mark me brainliest hope this helps! god bless


Which of the following is a chemical property of a sheet of paper?

A. The paper can be burned.
B. The paper can be crumbled.
C. The paper does not attract a magnet.
D. The paper does not conduct electricity.

Answers

Answer:

A

Explanation:

Flammability is a chemical property. The paper crumbling would be a physical property. The inability to attract a magnet or conduct electricity would be considered electrical properties

If you worked at a job for 9.00/hour, what type of correlation is the number of hours worked and your take-home pay?

Answers

Answer:

There is a linear correlation between the number of hours worked and take-home pay. And more exactly, a direct proportionality. [tex]C = 9\cdot t[/tex]

Explanation:

From statement we deduce that amount of hours worked ([tex]t[/tex]) (Independent variable, measured in hours) is directly proportional to take-home pay ([tex]C[/tex]) (dependent, measured in monetary units), since proportionality ratio is constant and, therefore, there exists a linear correlation between both variables. That is:

[tex]C \propto t[/tex]

[tex]C = k\cdot t[/tex] (Eq. 1)

Where [tex]k[/tex] is the proportionality ratio, measured in monetary units per hour. If we know that [tex]k = 9\,\frac{m.u.}{h}[/tex], then the resulting correlation is:

[tex]C = 9\cdot t[/tex]

There is a linear correlation between the number of hours worked and take-home pay.

Which metal is most likely to form more than one kind of positively charged ion?
A.Sodium
B.Barium
C.Nickel
D.Magnesium

Answers

C. Nickel, hope this helps!

Answer:

D.Magnesium

Explanation:

Cause imma nerd

organize the following location's from the smallest to largest respectively
A.Texas
B.United states
C.North America
D.City of Mission
E.Hidalgo county​

Answers

E. , D. , A. , B. , C.


Which type of matter is always made up of only one kind of atom?
A. Element
B. Mixture
C. Molecule
D. Compound
pls answer fast

Answers

Answer:

A. element

Explanation:

Answer: Element

Explanation: A substance that is composed of only one type of atom is called an element. At this point, what should amaze you is that all forms of matter in our universe are made with only 118 different building blocks.

Because of metallic bonding, when light is pointed at metals, they become
Oshiny
O malleable.
O ductile.
O conductive,

Answers

Metals become shiny when light is pointed at them.

Owing to the electronic configuration of metals ,metallic bonding exists in metals because of which when light is pointed at them they become shiny.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/14283892

#SPJ6

2. Mixtures can be solid, liquid or gas. It can be homogeneous or
heterogeneous and are made up of two or more components. Which of
the following mixtures where components are not visible??​

Answers

Answer:

A solution is a special type of homogeneous mixture where the ratio of solute to solvent remains the same throughout the solution and the particles are not visible with the naked eye, even if homogenised with multiple sources.

Explanation:

Mixtures can be either homogeneous or heterogeneous': a mixture in which constituents are distributed uniformly is called homogeneous, such as salt in water, otherwise it is called heterogeneous, such as sand in water.

Which statement best describe what happens during a chemical change

Answers

Answer:

both the identity and the properties of a substance change.

Answer:

its A both the identity and the properties of a substance change

Explanation:

got it right on edge

Which two parts are needed to make a neutral atom of nitrogen A. Electron clouds with a total of 14 electrons B. Electron cloud is a total of seven electrons C. A nucleus with seven protons and seven neutrons D. A nucleus with three protons and four neutrons

Answers

Answer:

B. Electron cloud is a total of seven electrons

C. A nucleus with seven protons and seven neutrons

Explanation:

An atom is consist of three subatomic particles: electron, proton, and neutron. Proton are positively charged particles and neutron have neutral charge, they both are present inside the nucleus in the center of the atom whereas electrons are negatively charged and surround the nucleus in a definite orbit.

Nitrogen is an element with 7 electrons in its outer orbit. As electrons are negatively charged so nitrogen atom will require 7 protons inside the nucleus to form a neutral atom of nitrogen. So, A neutral atom of nitrogen will consist of 7 electrons and 7 protons.

As, neutron has neutral charge so it will not affect the composition of neutral atom of nitrogen.

Hence, the correct options are:

"B. Electron cloud is a total of seven electrons

C. A nucleus with seven protons and seven neutrons ".

Answer:

B and C

Explanation:

How much energy is required to heat 0.24 KG lutetium from 296.2K to 373.5 K? The specific heat for lutetium is 0.154 J/g-K

Answers

Answer:D. 2857 joules

Explanation:

Not going to lie I guessed but got it right

According to specific heat capacity, 3596.208 joules of energy is required to heat 0.24 kg of lutetium from 296.2 K to 373.5 K.

What is specific heat capacity?

Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.

It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.

It is given by the formula ,

Q=mcΔT

Substitution in above formula gives, q= 0.24×154×97.3=3596.208 Joules.

Thus, 3596.208 joules of energy is required to heat 0.24 kg of lutetium from 296.2 K to 373.5 K.

Learn more about specific heat capacity,here:

https://brainly.com/question/1747943

#SPJ2

Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?

boiling point
shape
hardness
odor

Answers

Answer:

D odor

Explanation:

Answer: odor

Explanation:


If you had 4 protons and 5 neutrons you created which element *

Answers

Answer:

Beryllium

Explanation:

No. of protons = 4

No. of electrons = 4 (number of protons and neutrons are the same)

No. of neutrons = 5

You need to look at the number of electrons of the outer shell (group no.) there are and how many shells there are (period no.)

Then look at the period table of elements to find the element

Explain how your answer to CTQ 6 is consistent with your answer to CTQ 5.

Answers

Answer:

up 1

Explanation:

is sandy, silt, or clay loam better? and why?

Answers

clay soils are often rich in plant nutrients. In contrast, sandy soils can drain water too quickly for healthy plant growth and tend to be low in nutrients, but they are easier to work.

1 point
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

Answers

Explanation:

Nitrogen-14 is the most abundant isotopes of Nitrogen.

which describes the substances that form covalent bonds

Answers

Phosphorus and chlorine bond to form phosphorus trichloride

Answer:

both Non metal's G

Explanation:

i did the test

Explain the term catalyst and how it affects the rate of a chemical reaction.

Answers

Answer:

Catalyst. A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. Energy diagrams are useful to illustrate the effect of a catalyst on reaction rates.

Explanation:

Which particle changes to create an isotope of an atom?
A.proton
B.neutron
C.electron

Answers

Answer:

A

Explanation:

proton

I need help with this. Plzzzzz

Answers

Answer:what do you nned help with

Explanation:

Which has the least potential energy?

gases
liquids
solids

Answers

Answer

The answer is SOLIDS

Explanation:

The plasma state would have the least potential energy.

describe the relationship between the mass volume and density of material

Answers

Answer: For a given mass and volume, how much physical space a material takes up, of an object or substance, the density remains constant at a given temperature and pressure. The equation for this relationship is ρ = m / V in which ρ (rho) is density, m is mass and V is volume, making the density unit kg/m3.

Explanation:

after the nutrients are extracted, where does the food go, waiting to be expelled?

Answers

Answer:

Nutrients advance through the alimentary canal to the stomach and small intestine, and waste materials continue from the small intestine to the colon (large intestine) and anus.

Explanation:

Radioactive isotope X has a half-life of 500,000 years. This isotope may be found in some types of volcanic rocks. A particular sample of volcanic rock taken from a layer that covered up some of the earliest known human-like footprints contains 0.125 mg of isotope X. The volcanic rock sample originally contained 8.00 mg of isotope X. How long ago were these footprints made. I need the equation. Thanks. please I am stuck on this question. PLEASE

Answers

Answer: The footprints were made [tex]2.99\times 10^6years[/tex] years long ago.

Explanation:

Radioactive decay follows first order kinetics.

Half-life of isotope X= 500,000 years

[tex]\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{500000}=0.00000139year^{-1}[/tex]

The equation for first order kinetics is :

[tex]N=N_o\times e^{-\lambda t}[/tex]

N = amount left after time t  = 0.125 mg

[tex]N_0[/tex] = initial amount  = 8.00 mg

[tex]\lambda[/tex] = rate constant

t= time  

Putting the values we get:

[tex]0.125=8.00\times e^{- 0.00000139years^{-1}\times t}[/tex]

[tex]0.0156=e^{- 0.00000139years^{-1}\times t}[/tex]

[tex]t=2.99\times 10^6years[/tex]

The footprints were made [tex]2.99\times 10^6years[/tex] years long ago.

please help asappp
will mark branliest!!

Answers

Answer:c

Explanation:

Answer:

C is the answer

are in the outermost energy level

helppppppppppppppppppppppppppppppppppppppppppppppppp

Answers

Answer:   it is a

Explanation:

What group of organic compounds include starch?
a Carbohydrates
b Lipids
Thing
C Proteins
d Nucleic Acids

Answers

The answer is A.) Carbohydrates.

psoriasis is a disease that causes a red rash on the skin. which body system does psoriasis affect?
a. respiratory
b. integumentary
c. immune
d. digestive
e. circulatory​

Answers

Answer:

The answer to this question is integumentary.

Explanation:

The answer is that because that is your skin area and so if you have a rash then if will affect that part.

It's b. integumentary

I got the test right

PLEASE APEZ HELP I DONT UNDERSTAND
A teacher placed a plastic cup of warm coffee with a lid in the freezer.
Which statement describes the frozen coffee in comparison with the warm
coffee?
A. The amount of coffee is the same.
B. The speed of the coffee molecules has increased.
C. The temperature of the coffee has increased.
D. The arrangement of the coffee molecules is the same.

Answers

Answer: The answer is A

Explanation:.

Most metals are NOT ____ ? Liquid at room temperature, ductile, malleable, good conductors of heat and electricity.

Answers

Liquid at room temperature

Most metals are not liquid at room temperature. Therefore, option A is correct.

Most metals are not liquid at room temperature, except for a few specific exceptions such as mercury (Hg) and gallium (Ga). These metals have relatively low melting points, which allows them to exist in a liquid state at or near room temperature.

The majority of metals, however, exhibit a solid state at room temperature. This solid state is characterized by a regular arrangement of atoms or ions in a crystal lattice structure. The strength of metallic bonds holds the atoms together, giving metals their solid and rigid form.

To learn more about the metal, follow the link:

https://brainly.com/question/29404080

#SPJ6

Other Questions
first pirson to type 1 i will see if i can give brainlist but idk how bot i will try The poles appear to be slightly flattened in a Robinson Projection.Question 18 options: True False What happens to the plates and the mantle at plateboundaries How do Marshall court rulings support entrepreneurship and economic growth? According to Castiglione, what is the proper bodily frame for a courtly man? Why is extra height undesirable? Solve for b in the following equation. - 2 = 4b = 12b = 24b = 36b = 1 A student uses the following steps to prove the sine sum identity. The proof is incorrect. Which steps is incorrect Read, look, and select the best image for this dialogue, paying attention to whether it is formal or informal.Cul es su nombre, seor?Soy el seor Smith.Mucho gusto, seor Smith.El gusto es mo, seora. Dad greeting infant daughter Middle aged couple greeting a man in a suit Young boy and girl greeting each other Dad greeting daughter Calculating Rate of change A deck of cards has dimensions 8.9cm x 5.72cm x 1.82 cm. What is the volume of the deck in cubic centimeters? How can limited resources benefit the problem-solving capability in an organization?A. It encourages one to be resourceful.B. It is cost effective.C. It reduces the time taken to solve the problem.D. It makes one aggressive.E. It makes an employee more efficient Which wonder of the ancient world did Nebuchadrezzar create? * A certain even integer is 32 less than twice the next even integer. Find the integer.I know the answer is 28 but I do not know how to get to that answer. I could use help ASAP. Favorite place in the world and why? 3-5 sentences.ASAP A group of students formed a circle during a game. The circumference of the circle was about 43.96 feet, and the diameter of the circle was 14 feet.Which expression best represents the value of ? A. 43.967 B. 43.9614 C. 743.96 D. 1443.96 help!!! 3 Peter measured the width of a room as 28 feetand the length as 17 feet. About how manysquare feet does the room cover?Area = length X width HELP!!!!!!!!!!! Simplify7/9/14 Keith 1,342 cupcake rounds to 1,300 and joe 1,347 cupcake rounds to 1,350 who round to the nearest hundred? Twice the product of m and a decreased by thesquare of the sum of m and nWhich of the following is an expression for thestatement above?A) 2mn-(m? +n?)B) 2mn-(m+n)?C) (m+n)2 2mnD) (m? +n?)-2mn Lex be a random variable that represents the pH of arterial plasma (le, acidity of the blood). For healthy adults, the mean of the distribution is - 7.4.1 A new drug for arthritis hasbeen developed. However, it is thought that this drug may change blood pH. A random sample of 31 patients with arthritis took the drug for 3 months. Blood tests showed that x = 8.6 withsample standard deviations - 2.7. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the blood.USE SALT(a) what is the level of significance?what is the value of the sample test sisse? (Round your answer to three decimal places)