What are the four states of matter?

Answers

Answer 1

Answer: Solid, Liquid, Gas, and Plasma

Answer 2

Answer: Solid, Liquid, Gas, and Plasma

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How many moles are in 68.5 liters of oxygen gas at STP?

Answers

We can solve this problem when we use the conditions of a gas at standard temperature and pressure. It has been established that at STP where the temperature is 0 degrees Celsius and the pressure is 101.325 kPa, the volume of 1 mole of gas is 22.4 L. We will use this data for the calculations.

68.5 L ( 1 mol O2 / 22.4 L O2 ) = 3.06 mol O2

Explanation:

It is known that at STP, there are 22.4 L present in one mole of a substance.

Therefore, in 68.5 liters there will be 1 mol divided by 22.4 L times 68.5 L.

Mathematically, $68.5 L * (1 mol O_(2))/(22.4 L)$

= 3.05 mol

Hence, we can conclude that there are 3.05 moles present in 68.5 liters of oxygen gas at STP.

All silicate minerals must contain atoms of which of these elements? select all that apply.a. carbon
b. silicon
c. oxygen
d. hydrogen

Answers

All silicate minerals must contain atoms of b.silicon and c. oxygen. These are largely rock minerals that comprise approximately 90 percent of the crust of the Earth. The minerals vary in the composition and structure or ratio of silicon and oxygen.

Answer:

Silicon and oxygen

Explanation:

All silicate minerals must contain silicon and oxygen even though the name might mislead one into thinking it is only just silicon. Actually the suffix -ate in chemistry is used when an element is combined with oxygen. Which is why the carbonate ion has carbon and oxygen, the nitrate ion has nitrogen and oxygenThis repeats itself in the sulphate ion, phosphate ion, chromate ion, manganate ion etc.

I WILL GIVE BRAINLIEST!Pentan-2-ol was heated with an acidified solution of potassium dichromate. Name the product(s) of this reaction.
A) Pentanoid acid
B) Pentanal
C) Pentan-2-one
D) Propanoic acid and ethanoic acid

Answers

Answer:

C) Pentan-2-one

Explanation:

The product of the reaction of pentan-2-ol with acidified potassium dichromate is pentan-2-one.

Pentan-2-ol is a secondary alcohol, and secondary alcohols are oxidized to ketones by acidified potassium dichromate. The reaction is as follows:

CH3CH(OH)CH3 + K2Cr2O7 + H2SO4 → CH3COCH3 + Cr2(SO4)3 + K2SO4 + H2O

Propanoic and ethanoic acids are not products of this reaction.

Therefore, the answer is (C).

bardAI

the trend for ionization energy is a general increase from left to right across a period. However phosphorus is found to have higher first ionization energy value than sulfur. Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion

Answers

Since phosphorus is in the 5th group it has the ability to gain or lose electrons

Technician A says that a leaking head gasket can be tested for by using a chemical tester. Technician B says that a leaking head gasket can be found using an exhaust gas analyzer. Who is correct?

Answers

Answer: Both technicians are correct

Explanation: A chemical tester and exhaust gas analyzer are two important ways to check for gasket leakage

Which factors affect the flow of electric charge? Check all that apply.voltage
ampere
ohm
resistance
volt

Answers

the answers are voltage and resistance

Answer:

It is Voltage and Resistance

Explanation:

I got it correct on Edg2022 (picture above) ^^

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A 1.540 gram sample of an alloy containing only tin and zinc was reacted with excess fluorine gas to produce 2.489 grams in total of a mixture of tin IV fluoride and zinc fluoride. Calculate the percent composition by mass of the two metals in the alloy.

What 2 tools do we use to measure volume?

A measurement of the amount of solute that is dissolved in a given quantity of solvent; usually expressed as mol/L.