Answer:
90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you
Explanation:
BRIANLIEST!!!!!!
Use the mass to calculate the number of moles in a 347.89 g samples of ammonium
Answer:
20.46 moles
Explanation:
1 mole of NH3 contains 17gm of NH3
so 347.89 gm of ammonia is in,
347.89/17 moles
=20.46 moles
NOTE. There should be ammonia instead of ammonium in question because ammonium is an ion not a compound.
The chemical reaction shown is called photosynthesis. It involves water reacting with carbon
dioxide to produce glucose (see formulae below) and another gas. The chlorophyll in leaves
acts as a catalyst. ON A PIECE OF PAPER. Write a (BN level) word equation. (G Level)
Equation with formulae. (P-E) Balanced chemical equation with states.*
CoH1206
Answer:
See explanation
Explanation:
A word equation refers to a representation of a chemical process using word rather than appropriate chemical formulae.
Hence, the word equation for photosynthesis is this;
six moles of carbon dioxide + six moles of water -----> one mole of glucose + six moles of oxygen gas
The equation with formulae is;
6CO2 + 6H20 -------> C6H1206 + 6O2
Balanced chemical equation with states;
6CO2(g) + 6H20(l) -------> C6H1206(s) + 6O2(g)
3. Charles Law: What is the volume of the air in a Helium balloon that has 135 mL at 67.6 degrees
Fahrenheit if the temperature is raised to 100. degrees Fahrenheit?
Answer:
199.7mL
Explanation:
Using Charles law equation as follows:
V1/T1 = V2/T2
Where;
V1 = initial volume (mL)
T1 = initial temperature (°F)
V2 = final volume (mL)
T2 = final temperature (°F)
According to the information provided in this question, V1 = 135mL, V2 = ?, T1 = 67.6°F, T2 = 100°F
Using V1/T1 = V2/T2
135/67.6 = V2/100
Cross multiply
135 × 100 = 67.6 × V2
13500 = 67.6V2
V2 = 13500/67.6
V2 = 199.704
The new volume in the air in the helium ballon is 199.7mL.
Answer:
199.7mlexplain;
math
Analyze the given diagram of the carbon cycle below. Use complete sentences to explain your answer.
Part 1: Which process does arrow F represent?
Part 2: Explain how matter is conserved during the process.
Part 3: Justify why this process is a recycling of carbon in the carbon cycle.
Answer:
I'm not to sure I'll ask one of my frens to help
What is the volume occupied by 40 grams of argon gas (Ar) at standard conditions?
Answer:volume occupied by 40 grams of argon gas (Ar) at standard conditions = 22.443L
Explanation:
Using the ideal gas law that
PV =nRT
Where p =pressure,
V = volume,
n = number of moles
R = gas constant, and
T= temperature in Kelvin.
Since Argon is at STP( Standard conditions), This means that temperature is 273.15 K and pressure is 1 atm
Also the gas constant= 0.08206 L atm/K mol . we are using this value because its units match the units of our values to aid easy calculation
So,
Number of moles = Mass/ Molar mass
=40g/39.948 g/mol
Number of moles of Argon=1.0013moles.
Now Bringing
pV= nRT
V= nRT/p
=(1.0013mol x 0.08206 L atm/K mol x 273.15 K ) /1atm
Volume =22.443L
The shade or pigment of a mineral is known as
Luster
Hardness
Density
Streak
O Color
Answer:
Streak
Explanation:
The streak of a mineral is the color of the powder produced when it is dragged across an un-weathered surface.
One mole of carbon contains 6.02 x 10^23 _ _ _ _ _ _ _ _ _ _ _ _ _ of carbon.
1 mole of carbon contains 6.02*(10^23) atoms of carbon
Use the half reaction method to balance the following reaction in acid:
I2 + Na2S2O3 -> Na2S2O4 + NaI
Answer:
I2 + 2S2O3^2- --------> S4O6^2- + 2I^-
Explanation:
The correct equation is;
2Na2S2O3 + I2 → Na2S4O6 + 2NaI
Oxidation half equation;
2S2O3^2- --------> S4O6^2- + 2e-
Reduction half equation;
I2 + 2e ----------> 2I^-
Overall balanced redox reaction equation;
I2 + 2S2O3^2- --------> S4O6^2- + 2I^-
Provide an explanation for each of the following strange facts about Mercury:
1. Mercury’s atmosphere is incredibly thin.
2. The length of a Mercury year is about 1.5 times longer than a Mercury day.
3. The temperature range on Mercury is about 590 °C.
Answer:
Explanation:
1. Mercury’s atmosphere is incredibly thin.
It's thin because the atmosphere is made up of atoms blasted off its surface by the Solar wind and also consist of the stream particles coming from the outer layer of the sun
2. The length of a mercury year is about 1.5 times longer than a mercury a day.
Mercury revolves around the sun very quickly but rotates around its axis very very slowly
3.The temperature range on Mercury is about 590 °C.
During the day, temperatures on Mercury's surface can reach Very High But, the planet has no atmosphere to retain that heat
List the phase changes that result of an increase of molecular kinetic energy pls help!! 30 points!
Answer:
Explanation:
The term change of phase means the same thing as the term change of state. ... i.e. during phase change, the energy supplied is used only to separate the molecules ; no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, since kinetic energy of molecules remains the same.
Help please! This is due in 15 mins
Using the partial periodic table, which statement is correct?
*Oxygen (O) has more protons than chlorine (Cl).
*Iron (Fe) has more protons than silver (Ag).
*Sodium (Na) has more protons than carbon (C).
*Hydrogen (H) has more protons than helium (He).
Answer:
Sodium (Na) has more protons than carbon (C).
hope that helps!
Two students performed a lab to see how the density and salinity of water are related. Both beakers began with the same salinity level. Beaker A was left alone, and B was placed under a heat lamp. Students will check the salinity level in the water after a day. The results of the investigation showed that…
Answer: the water avaperatid
because of the heat lamp
hope this helps
Explanation:
The speed of chemical weathering depends on:
water freezing
amount of wind
soil depth
Answer:
Its soil depth
Explanation:
give me a paragraph on what people do when using slim fast?
The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. ... A product is a substance that is present at the end of a chemical reaction.
Answer:
✓ Reactants
✓Reactants
✓ product
Explanation:
The substance(s) to the left of the arrow in a chemical equation are called ..................
A ............... is a substance that is present at the start of a chemical reaction.
A ................. is a substance that is present at the end of a chemical reaction.
Reactants are substances that undergo chemical reaction and are present at the beginning of the reaction and are consumed during the process of the reaction to form a product.
2H2 + O2 ------>2H2O
Here H2 and O2 are Reactants while water H2O is the product ( water)
Products are species that are produced after the chemical reaction have taken place.
CHAPTER
CHAPTER ASSESSMENT
Understanding Main Ideas (Part A)
In the space at the left, write true if the statement is true; if the statement is false,
change the italicized term to make it true.
1. The overall charge of a formula unit for a compound is never zero.
2. In a crystal lattice, each positive ion is surrounded by negative ions.
3. Delocalized valence electrons are typical of ionic compounds.
4. A sulfate ion contains fewer oxygen atoms than a sulfite ion does.
true
5. Metals tend to be malleable and ductile and to have relatively high
melting points.
6. The more negative the lattice energy is, the stronger is the force of
attraction between the ions of an ionic compound.
7. In naming ionic compounds, the cation is named first.
8. When a metal reacts with a nonmetal, the metal tends to gain electrons.
9. In naming a monatomic anion, the suffix -ide is used.
10. The prefix per- is used in naming the anion with the most oxygen atoms.
Answer:
The answer is in correct
what is the element (periodic table of elements) of an m&m
Answer:
Explanation:
There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.
An ice cube, a glass of cold water, and a swimming pool are each exposed to the same amount of sunlight on a hot day. After five minutes, the ice cube is
melted and the cold drink is two degrees warmer, but the temperature of the swimming pool remains unchanged. What is the best explanation for these
observations?
A. The ice cube has a higher heat capacity than the glass of water and the pool.
B. The ice cube has a lower heat capacity than the glass of water and the pool.
C. The ice cube and the glass of water have higher heat capacities than the swimming pool.
D. The ice cube and the glass of water have lower heat capacities than the swimming pool.
Answer:
D
Explanation:
sana makatulong huhu follow me thanks
Answer:
C. the ice cube and the glass of water have higher heat capacity than the swimming pool
How many moles of Aluminum are in 54.0 grams of Aluminum (Al)?
Answer: 2 moles
Explanation:
AM of Al 27
Plz answer the question in the picture.
Answer:
a
Explanation:
a mixture is a material made up of two or more different substances which are not chemically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.
Answer:
A digram show mixture
Because mixture is formed by simple mixing of many substances
And figure A shows different substances
Explanation:
What are calories used for?
hurry pls!
Answer:
Calories are used for physical activity.
Explanation:
Calories provide energy for consumers. You may notice when you drink or eat, you gain more energy. This is because calories are stored in our drinks and foods.
Answer:
They are
Explanation:
They are used to make people obese. The government uses calories to make people weak and unhealthy. For example, McDonalds is known to have many calories in their food. I hate the government.
Q11
1 point
4.8 g of Magnesium reacts with 3.2g of oxygen.
Choose the correct mass of oxygen that will react with 48g of Magnesium?
68g
18g
32g
36g
Answer:
Amount of oxygen react with 48 g of magnesium = 32 gram
Explanation:
Given:
Amount of oxygen react with 4.8 g of magnesium = 3.2 g
Find:
Amount of oxygen react with 48 g of magnesium
Computation:
Using Law of equal proportion;
Amount of oxygen react with 48 g of magnesium = 48(3.2/4.8)
Amount of oxygen react with 48 g of magnesium = 32 gram
can someone plz help me im running out of time !!!!
Balance the chemical equation below using the smallest possible whole number
stoichiometric coefficients.
Q1= C(s)+H2(g) -> C2H6(g)
Q2= NH3(g)+O2(g)-> HCN(aq)+H2O(l)
Answer:
1. C(2)+H2(1) -> C2H6(1)
2. NH3(2)+O2(3)-> HCN(2)+H2O(3)
I am not sure about the second one.
help me pleaseeeeeeeeeeeeeeeeeeeeeeeeee
Answer: nitrogen
Explanation:
Select the correct answer.
In which reaction is precipitation occurring?
A.
MgCl2(aq) + CuSO4(aq) → CuCl2(aq) + MgSO4(aq)
B.
CdSO4(aq) + K2S(aq) → CdS(s) + K2SO4(aq)
C.
NaOH(aq) + NH4Cl(aq) → NaCl(aq) + NH4OH(aq)
D.
K2SO4(aq) + NaOH(aq) → K2OH(aq) + NaSO4(aq)
E.
HNO3(aq) + KOH(aq) → KNO3(aq) + H2O(l)
Answer:
B. CdSO4(aq) + K2S(aq) → CdS(s) + K2SO4(aq)
Explanation:
A precipitate reaction is when a solid forms, so in this case CdS is the precipitate.
why ammonia is a identified as a weak base?
can you explain what it is meant by it only ionise partially?
Answer:
Ammonia doesn't contain any hydroxide ions to begin, but it's dissolved in water acquires hydrogen ion from the water to produce hydroxide as well as ammonium ions. However ammonia doesn't fully convert into hydroxide and ammonium ions in solution that's why ammonia is a weak base.
PLEASE HELPPPP...If you have a mass of 70 kg and you are standing on a platform 8 m above the ground, what is your gravitational potential energy?
Answer: 5491.72
Explanation:
non examples of chemical formulas
Answer:
1+2 = 12
Explanation:
this is a math equation, not a chemical formula
Picture a neutral S atom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be
ASAP PLEASE
Answer:
has 6 valence electrons as its in group 6
the atom will gain electrons
the charge will be 2- as it will gain 2 electrons to be a full configuration