Answer:
chill
Explanation:
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
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
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:
What is the correct name for OF2?
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 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.
How many grams of AICI: are needed to produce 150 grams of NaCl?
Answer:
18.7g
Explanation:
how is carbon dioxide collected in laboratory
Answer:
Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory.
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).
if a substance has a mass of 8 grams what is its volume
Which block do you think will slide down the ramp most quickly?
Rubber block
Or
Steel block
Please explain why
how many days does it take one moon phase go to the next?
Answer:
1 month i believe sorry if im wrong
Explanation:
what can you infer about a wave with a short wave leagth
Answer:
It has a high frequency
Explanation:
Beryllium
Be
+
Sulfur
So
Be2+ + S2- -> BeS
Product formula : BeS0.3747x + 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:
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-
what is the smallest unit of NaCl?
Answer:
A molecule of Nacl
Maybe
Where does condensation occur?
lithosphere (rocky, crust of earth)
atmosphere (clouds)
hydrosphere (lakes and oceans)
biosphere (where the living things are)
Draw a molecule of ammonia showing the covalent bonds, with
outer-shell electrons only on the atoms.
Answer:
Explained below
Explanation:
Formula for Ammonia is NH3
Now, Nitrogen has 5 electrons in it's outermost shell while hydrogen has only 1 electron.
Thus means that nitrogen needs three more electrons to add to it's five to complete it's octet shell.
Whereas each hydrogen atom will need one extra electron to complete 2 electrons in it's outermost shell.
As depicted in the image attached, Each atom will now have a complete valence shell since the three
Hydrogen(H) atoms share their electrons thereby forming covalent bonds with one Nitrogen(N) atom.
Picture is below! Thanks :)
Answer:
A compound is material formed by chemically bonding two or more chemical elements.And if it can be separated than you know that its a compound.
Explanation:
have a goooooooood day:)
____ 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
The least polar bond is found in a molecule of hi hf hcl hbr
Answer:
HI is least polar
Explanation:
Substance to
be dissolves
less of it
Answer:
solute
Explanation:
can someone help me?
Answer:
Explanation:
c
what reagents can be used to test for unsaturation of hydrocarbons?
Answer:
tite
Explanation:
bulbol tiwjwbwbbsjakajabwvwbe
¿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
What is the charge and size of electrons? *
Answer:
small size and negative
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.
SOMEONE PLEASE HELP!!!
Answer:
1 is correct and 2 is liquid
Explanation: