Answer:
i bought it cuz i need a cup?
Explanation:
Answer:
Best chemistry ever tho
Explanation:
LOL
What is the molar mass of Al(NO3)3 · 3H2O?
Answer:
Go to your periodic table and look for each element. Find the mass for Aluminum, Nitrogen, Oxygen, and Hydrogen.
After you find those, for each compound you must add them together and find the least amount of sig figs after the decimal point.
For the first compound, Al(NO3)3, you will have a total of
1 Aluminum atom
3 Nitrogen atoms
9 Oxygen atoms
Aluminum has 26.982 g/mol
Nitrogen has 14.007 g/mol
Oxygen has 15.999 g/mol
Now multiply those numbers by the amount of atoms of each element.
(1)26.982 g/mol = 26.982 g/mol
(3)14.007 g/mol = 42.021 g/mol
(9)15.999 g/mol = 143.991 g/mol
now add all of those numbers together, and you see that their least significant figure after the decimal is 3, so round to 3 digits after the decimal point.
26.983 + 42.021 + 143.991 = 212.994
now do the same for the other compound
to start you off.. you have
6 Hydrogen atoms
3 Oxygen atoms
Hydrogen has 1.009 g/mol
Oxygen has 15.999 g/mol
the least significant figure after the decimal point is 3, so round you 3 digits after the decimal point.
after you finish getting your totals, you. until them and find the greatest sig fig over all. comment on this if you need further instruction :)
Solve the equation.
3 - y = 13
y =
Answer:
First we isolate y by doing - 3
-y = 10
Explanation:
-10 since 3- (-10) is actually 3 + 10 which is 13
Elements make up all things. What is it called
Answer:
Matter
Explanation:
All matter is made up of substances called elements
Is NO ionic or covalent
Something that is made out of natural resources for human use is called
Answer: Man Made Resources?
Explanation: Its when humans create their own things.
Lights give off energy in the form of thermal energy and
energy
Answer: Energy, or the ability to do work, can exist in many different forms. ... The stage lights use electrical energy and give off both light energy and thermal energy, commonly called heat.
Explanation:
Hope this help
heat alwais moves from ____ to _____.
Answer: left to right
Explanation:
If you look up at the night sky long enough, the stars will appear to move across the sky. What is responsible for making the stars appear to move across the sky at night?
A. Earth's Revolution
B. Earth's rotation on its axis
C. Earth's position in its orbit
D. Earth's distance from the sun
Write Lewis dot structures for each of the following molecules. Use VSEPR to determine the shape of each molecule. Use electronegativity values to determine the polarity of each molecule.
PH3
CHCl3
H2CO
XeCl4
PBr5
TeF4
ICl5
BF3
KrF2
SO3
my question is butterfly emerges
DESPERATE WILL GIVE BRAINLIST AND THANKS (PLEASE HURRY )
Look at the Punnett square below which shows the cross between two frogs. Green is the dominant skin color while brown is the recessive skin color. What are the phenotype probabilities?
Question 8 options:
50% green, 50% brown
25% green, 25% brown
100% green, 0% brown
75% green, 25% brown
Which layer of the atmosphere is directly above the troposphere?
exosphere
stratosphere
troposphere
mesosphere
Answer:
stratosphere is directly above troposphere I think
_____ is responsible for bringing gravity into modern science.
Isaac Newton
Galileo Galilei
Albert Einstein
Heelllpp.!!
How many moles are in 78 grams of Chlorine
gas (CI)?
Answer:
Grams of chlorine gas to moles
The SI base unit for amount of substance is the mole. 1 grams Chlorine is equal to 0.028206357713029 mole.
Explanation:
Match the orbital to its diagram.
Answer:
s --- the round single circle
p --- the two lobes
d --- the four lobes
f --- complex shape
The sum of the atomic masses for any compound is the compound’s:
Empirical mass
Compound mass
Atomic mass
Molar mass
IF A CAPPED GLASS BOTTLE IS THROWN INTO A FIRE, WHAT WILL HAPPEN TO THE BOTTLE AND WHY?
Answer:
it will explode (not intensely) there is some oxygen in the bottle so the cap would pop off violently, the longer it stays in the fire the more energy is being pent up.
Explanation:
Answer:
The bottle will increase in both temperature and pressure which will cause the bottle to crack/shatter! Hope this helps :)
Explanation:
The law of Gay-Lussac states that as temperature increases so will pressure.
which factor is abiotic A.)water B.) a plant c.) animal
Answer:
answer is A.) Water
Answer:
a) water
have a good day!
Would water boil at Huntington Beach or at Big Bear. (hint, Huntington beach is at sea level, Big Bear is 6700 ft above sea level) Assume the amount of water and the air temperature are the same in both locations. Explain your answer in detail!
Balance this equation:
CuO + HCl → CuCl + H2O
Answer: CuO + 2 HCl = CuCl2 + H2O
Explanation:
Omg please help me im doing so well in science i have a 100 and this if for a grade and i really need t o kkeep that 100
Answer:
b
Explanation:
This means that it takes more energy or heat to increase water's temperature than it does for most other substances. The specific heat of water is greater than that of dry soil, therefore water both absorbs and releases heat more slowly than land.
PLEASE HELP ME RNNNN!!! A specific characteristic, such as blue eyes, is known as a *
Answer:
A trait is a specific characteristic of an organism. Traits can be determined by genes or the environment, or more commonly by interactions between them. The genetic contribution to a trait is called the genotype.
Explanation:
if not then its a feature,
Describe how PERIODS and GROUPS are set up on the Periodic Table of Elements.
Answer:
Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.
(Love your pfp btw)
Explanation:
when 34 700 j of heat are applied to a 350 g sample of liquid methanol, what must its heat of vaporization be to convert it all to gas?
Answer:
The temperature at which the vapor pressure of a liquid is just equal to the external ... The conversion of a liquid to a gas below the boiling point is called ... equilibrium temperature of the mixture was 36.0 °C. What is the specific heat (J/ g°C) of the metal
Explanation:
Determine the empirical formula of an oxide of silicon from the following: mass of crucible= 18.20g, mass of crucible +silicon =18.48g and mass of crucibe+ oxide of silicon =18.80g
Please help me I don’t understand
balance de CO2 + H2O
Explanation:
6 CO2 + 12 H2O ---->C6H12O6 + 6 O2+ 6 H2O
Which of the following materials are least porous?
Loosely packed gravel
sorted sand and rock
unsorted sand and rock
large pebbles and boulders
How many moles of a gas sample are in a 5.0 L container at 373 K and 203 kPa?
0.33 mole
0.66 mole
1.11 moles
3.05 moles
Answer:0.33
I'm not sure tho
Answer:
0.33
I just took the test.
The general oxidation of a metal ( M ) by a copper ion ( Cu2+ ) is M(s)+Cu2+(aq)⟶M2+(aq)+Cu(s) All the listed metals can be oxidized by Cu2+ ions but the reactions will occur at different rates. Arrange the metals based on how quickly each oxidation by Cu2+ ions should occur.
Answer:
Ba, Ca, Mn, Ni
Explanation:
A sample of nitrogen gas contains 8.23 x 10^23 molecules. What is the volume of this sample at STP?
Please show and explain the steps.
Answer:
30.6 L
Explanation:
Given data:
Number of molecules of nitrogen = 8.23×10²³ molecules
Volume occupy at STP = ?
Solution:
Standard temperature = 273.15 K
Standard pressure = 1 atm
One mole of any substance at STP occupy 22.4 L volume.
Number of moles of nitrogen:
1 mole contain 6.022×10²³ molecules.
8.23×10²³ molecules × 1mol / 6.022×10²³ molecules
1.37 mol
Volume of nitrogen:
1.37 mol × 22.4 L / 1 mol
30.6 L