Answer:
Radioactive dating uses the age of a radioactive element to determine the exact age of a sample of rock or fossil.
Explanation:
The method of matching the profusion ratio of a radioactive isotope to a source isotope to ascertain the age of a substance is described radioactive dating. Potassium-Argon dating is the usual generally employed procedure of radiometric dating. Potassium is an ingredient in many traditional minerals and can be practiced to discover the ages of metamorphic and volcanic rocks.
Which properties describe all matter? A. being able to be seen in nature B. having energy and temperature C. having mass and taking up space
Answer:
C. having mass and taking up space
good luck, i hope this helps :)
what can you infer about a wave with a short wave leagth
Answer:
It has a high frequency
Explanation:
How many molecules of CO2 are in 8.6 mol of CO2?
Answer: You’d have to convert from mol to molecule.
Explanation: Like this:
A neutral atom has 12 protons. In chemical bonding, which is the most likely charge of the ion?
A. 2+
B. 1+
C. 2-
D. 6-
The least polar bond is found in a molecule of hi hf hcl hbr
Answer:
HI is least polar
Explanation:
A gas at a pressure of 360 torrs and a volume of 750 ml. If the pressure becomes 1.5 atm what is the new volume?
Answer:
V₂ = 236.84 mL
Explanation:
The relation between pressure and volume is inverse.
We can write it as follows :
[tex]P_1V_1=P_2V_2[/tex]
We have,
P₁ = 360 torrs, V₁ = 750 mL, P₂ = 1.5 atm = 1140 torr.
So,
[tex]V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{360\times 750}{1140}\\\\V_2=236.84\ mL[/tex]
So, the new volume of the gas is 236.84 mL.
0.3747x + 11.598 pls help meeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
that isn't a full equation but I will assume this is = to 0
that makes x 30.95
Explanation:
how many days does it take one moon phase go to the next?
Answer:
1 month i believe sorry if im wrong
Explanation:
How many atoms are there in molecule of glucose (CH12O6)
Answer:
One molecule of glucose has 6 atoms, as you can see in carbon's index. ( C6 ). In 20 molecules there will be 6⋅20 carbon atoms.
Explanation:
what is the other term used to describe tropical cyclone when it is formed in the northwestern part of the pacific ocean
Answer:
Typhoons
Explanation:
A tropical cyclone is a word that is used by meteorologists to explain a rotating, organized system of clouds & thunderstorms that take their origins over tropical or subtropical waters and also possess closed but low-level circulation.
Now, In the Northwest part of the Pacific ocean, these tropical cyclones which are west of the dateline are referred to as Typhoons while In the southwest Pacific and in the Indian Ocean they are called Cyclones. Lastly, those that form over the Atlantic Ocean or eastern Pacific Ocean are referred to as hurricanes
What special label do you have to use when naming ionic compounds with transition metals?
A) Roman Numerals
B) Greek Numerals
Naming Ionic compounds with transition metals requires the use of a roman numeral. The charge of the metal ion must be written in the name of the compound with a roman numeral. This is because transition metals can have more than one valence (or charge).
How is sublimation and deposition different from melting and freezing?
What is the correct name for OF2?
____ NaF + ____ Br2 à ____ NaBr + ____ F2
A. ---, 2, 2, ---
B. 2, ---, ---, 2
C. 2, ---, 2, ---
Answer:
2 NaF + Br2 --> 2NaBr + F2
Explanation:
Well first I notice that there are two flourines on the products side so we need to put a 2 of NaF. Now there are 2 sodiums on the products side so we have to put another two in front of NaBr.
2 NaF + Br2 --> 2NaBr + F2
Where does condensation occur?
lithosphere (rocky, crust of earth)
atmosphere (clouds)
hydrosphere (lakes and oceans)
biosphere (where the living things are)
Balance the following equation (separate your answers with commas):
____AgNO3 + ____Cu --> ___Cu(NO3)2 + ____Ag
What is the charge and size of electrons? *
Answer:
small size and negative
What is Proteins Structure
Answer:
Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule. Proteins are polymers – specifically polypeptides – formed from sequences of amino acids, the monomers of the polymer. ... Protein structures range in size from tens to several thousand amino acids.
SOMEONE PLEASE HELP!!!
Answer:
1 is correct and 2 is liquid
Explanation:
(IMAGE ATTACHED)
(pls help this is due tonight)
Answer:
You can see that the line is going up and is curved in a positive direction.
Explanation:
When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration.
can someone help me?
Answer:
Explanation:
c
Help! Will give will give brainllest
1. An airplane flies 1431 miles in 2 hours 15 minutes. What is its average speed in miles per hour?
2. A train travels 76 miles in 1 7/12 hours. What is its average speed in miles per hour?
3. An airplane flies 1914 miles in 2 3/4 hours. What is its average speed in miles per hour?
4. A train travels 102 miles in 2 5/6 hours. What is its average speed in miles per hour?
5. Tracy runs 26.2 miles in 3 hours and 45 minutes. What is her average pace in minutes and seconds?
Answer:
1. 636miles/hour
2. 53.65milesper hour
3.696miles per hour
4.37.09mikes per hour
5. 6.99miles/hour
Explanation:
you first convert all the time into improper fractions
then work out speed which is got by dividing distance with time
By examining the fossil record, we know that there has been a gradual diversity of species.
true or false?
what is the smallest unit of NaCl?
Answer:
A molecule of Nacl
Maybe
Beryllium
Be
+
Sulfur
So
Be2+ + S2- -> BeS
Product formula : BeS¿Cuántos moles de bióxido de Nitrógeno (NO 2) se forman cuando reaccionan 5 moles de Nitrógeno (N 2)?
Answer:
10 moles de NO2
Explanation:
Tenemos la ecuación de la reacción como sigue;
N2 (g) + 2 O2 (g) → 2 NO2 (g)
Asi que;
Si 1 mol de nitrógeno produce 2 moles de NO2
5 moles de nitrógeno producirán 5 * 2/1 = 10
Por tanto, se producen 10 moles de NO2 moles
The dull coating, or tarnish, on an aluminum lawn chair is produced by a
redox reaction between aluminum and oxygen. What occurs during this
reaction?
A. A double-replacement reaction takes place.
B. The reaction is a single-replacement reaction.
O C. Aluminum atoms lose electrons to oxygen atoms.
D. Aluminum atoms gain electrons from oxygen atoms.
Option C. Aluminum atoms lose electrons to oxygen atoms.
Answer:
C. Aluminum atoms lose electrons to oxygen atoms.
How I Know :
hope this helps you ! good luck ! :)
add me as a friend , ill add back so we can be friends !! <3
☆ REMINDER : ☆
☁ ˖⁺ stay safe we are still in the middle of a pandemic
☁˖⁺ drink plenty of water to stay hydrated
☁ ˖⁺ love yourself and know someone loves you
☁ ˖⁺ never give up and talk to someone if your feelings scared/sad/mad
☁ ˖⁺ its never okay to stay silent .
﹤୨♡୧﹥ have an amazing day/night
A sample of gas in a closed container at a temperature of 100oC and 3 atm is heated to 300oC. What is the pressure of the gas at the higher temperature?
Answer:
6.14 atm
Explanation:
Initial temperature (T₁) = 100 °C
Initial pressure (P₁) = 4 atm
Final temperature (T₂) = 300 °C
Final pressure (P₂) =?
NOTE: Volume = constant (since the system is a closed system)
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = 100 °C
Initial temperature (T₁) = 100 °C + 273 = 373 K
Final temperature (T₂) = 300 °C
Final temperature (T₂) = 300 °C + 273 = 573 K
Finally, we shall determine the pressure at the highest temperature as follow:
Initial temperature (T₁) = 373 K
Initial pressure (P₁) = 4 atm
Final temperature (T₂) = 573 K
Final pressure (P₂) =?
P₁ / T₁ = P₂ / T₂
4 / 373 = P₂ / 573
Cross multiply
373 × P₂ = 4 × 573
373 × P₂ = 2292
Divide both side by 373
P₂ = 2292 / 373
P₂ = 6.14 atm
Thus, the pressure at the highest temperature is 6.14 atm
3. How many atoms are in 85 moles H2O?
Answer:
5.119 *10^25
Explanation:
1 mole = 6.022 * 10^23
[tex]\frac{85 mol H20}{1} =\frac{6.022*10^2^3}{1 mol H20}[/tex]
the moles cancel out so you get
85 * (6.022*10^23)
Plug that into the calculator so you get:
5.119 *10^25
1.When two systems that have the same temperature are put in contact with each other, is there heat transfer going on?
2.When two systems that have different temperatures are put in contact with each other, is there going to be heat transfer? Explain.
Answer:
Sorry I don't know the answer of your question I am sorry.