Answer:
They are stable
Explanation:
majority are stable
Classify the following statement as a prediction, observation, theory,
or law. Please be sure to classify the statement exactly as it is
written!
If he kicks the ball, then it will go into the goal.
Answer:
I believe that it is a prediction.
Explanation:
Because you can't kick the ball and say it will go into the goal. Of course if it is right in front of the goal and you kick it will go in but in both cases if you kick it too hard it will go in and then bounce off the net and roll back out of the goal. So in my opinion it is a prediction.
Question 1: Jensen is a huge fan of Wendy’s, especially their buttermilk ranch dressing. One of his friends told him that they wouldn’t be surprised if he had decided to take a bath with it, so naturally, he wants to do just that. The net weight of a single ranch container is 21.3g and the weight of the packaging is 0.4g, with a volume of 0.75fl oz. Jensen’s perfectly rectangular bathtub has the dimensions 2.3m x 1.2m x 0.46m. Using this information, calculate a) the density of the ranch dressing, b) the mass of ranch dressing needed to fill the tub to the brim, and c) the number of containers of ranch he needs to fill the tub.
Useful Conversions: 1 fl oz = 29.57 mL, 1 cm3 = 1 mL
Answer:
has the dimensions 2.3m x 1.2m x 0.46m. Using this information, calculate a) the density of the ranch dressing, b) the mass of ranch dressing needed to fill the tub
how does gas create pressure?
a. the force of a collision between two gas molecules with the same amount of kinetic energy creates pressure
b. the force of a collision of a gas molecule against the walls of its container create pressure
c. the force of a collision between two gas molecules with different temperatures creates pressure
d. the force of a collision of a gas molecule against the air in a container creates pressure
What does the group number of an element tell you about the electrons?
Answer:
Explanation:
The group number of an element tells about the total number of electrons present in the valence shell or orbit of an atom.
Plz answer fast , (it’s a picture
Answer:
Explanation:
1.4193.61
2.1.69205e7
3.1.57611e14
4.46270.5
Does gold have high lustre?
hello, can someone help? i’ve been stuck on this for a few days... it will be greatly appreciated if u help T-T thanks in advance
Answer:
A
B
C
Explanation:
Remark
Delta H is put on the reactant side of the equation. If delta H is plus the reaction goes to the right. If anything causes delta H to decrease, the reaction shifts left when delta H is originally negative.
One
Delta H is positive which means that heat has to be added before the reaction can take place. If the temperature decreases, then H2 will decrease because delta H is fighting off the temperature decrease The answer is A
Two
Pressure decreases. The side (left or right) with the most number of moles will be favored. The left side has 2 moles. The right side has 4 moles. The right side is favored. Answer: B
Three
The concentration of NH3 increases. That will increase the products. H2 increases. Answer C
Once you have completed a correct water cycle, include a paragraph summary of the process, and how certain steps of the process may affect you.Write your answer in the essay box below.
Answer:
That fresh water hydrates the carbon-based lifeforms on earth. But through evaporation, and transpiration from plants leaf surfaces, it gets back into the atmosphere to feed clouds for the next rainfall. The cycling of liquid water and returning vapor creates our climate and our living environment.
Explanation:
The summary of the water cycle process is given below.
What are the important steps in water cycle?The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.
Water in different phases moves through the atmosphere (transportation). Liquid water flows across land (runoff), into the ground (infiltration and percolation), and through the ground (groundwater).
Groundwater moves into plants (plant uptake) and evaporates from plants into the atmosphere (transpiration). Solid ice and snow can turn directly into gas (sublimation). The opposite can also take place when water vapor becomes solid (deposition).
Therefore, The summary of the water cycle has been explained.
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13. PLEASE HELP
The volume of a gas is 4.0 L, the pressure is 1 atm, and the temperature is 200 K. A chemist
changes one factor while keeping another constant so that the new volume is 5.0 L. Which of
the following could be the new conditions? (4 points)
The final pressure is 0.8 atm, while temperature is kept constant.
The final temperature is 150 K, while pressure remains constant.
The final pressure is 1.5 atm, while temperature is kept constant.
m
The final temperature is 100 K, while pressure remains constant.
Answer:
A the pressure is changed to 0.8
Explanation:
Boyles gas law
The factor that the chemist changed is so that the new volume is 5.0 L is the final pressure is 0.8 atm, while temperature is kept constant.
What is Boyle's law?Robert Boyle studied the relationship between pressure p and volume V of a fixed amount of gas held at a constant temperature in the mid 1600s.
Boyle discovered that the product of pressure and volume remains nearly constant. For an ideal gas, the product of pressure and volume is a constant.
Thus, the correct option is A, The final pressure is 0.8 atm, while temperature is kept constant.
Learn more about Boyle's law
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justify, a substance is not totally consumed after two half lives.
Answer:
The answer is in the explanation
Explanation:
Half-life is defined as the time that a substance requires to decrease its concentration in the half of the initial concentration. For example, if we have 1M of a substance X, after 1 half life the concentration is:
1M / 2 = 0.5M
Now, after the second half-life, the concentration would be:
0.5M / 2 = 0.25M
That is the reason why the substance is not totally consumed after two half lives.
calculate the mols of alt gas if the volume is 0.97 liters at a temperature of 12 C and the pressure is 152 Kpa’s
Answer:
0.062mol
Explanation:
Using ideal gas law as follows;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821Latm/molK)
T = temperature (K)
Based on the information provided;
P = 152 Kpa = 152/101 = 1.50atm
V = 0.97L
n = ?
T = 12°C = 12 + 273 = 285K
Using PV = nRT
n = PV/RT
n = (1.5 × 0.97) ÷ (0.0821 × 285)
n = 1.455 ÷ 23.39
n = 0.062mol
What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 ATM and the temperature is held constant
Answer:
[tex]\boxed {\boxed {\sf P_2= 9 \ atm}}[/tex]
Explanation:
Since the temperature is held constant, we only need to focus on the volume and pressure. We will use Boyle's Law, which states the volume of a gas is inversely proportional to the pressure. The formula is:
[tex]P_1V_1=P_2V_2[/tex]
Originally, the gas had a volume of 150 milliliters and a pressure of 3.0 atmospheres. We can substitute these values into the left side of the equation.
[tex]3.0 \ atm * 150 \ mL = P_2V_2[/tex]
The original gas was compressed to a volume of 50 milliliters, but we don't know the volume.
[tex]3.0 \ atm *150 \ mL= P_2 * 50 \ mL[/tex]
Now, we need to solve for the new pressure (P₂). Multiply on the left side first.
[tex]450 \ atm*mL= P_2 * 50 \ mL[/tex]
Since we are solving for the pressure, we need to isolate the variable. It is being multiplied by 50 mL. The inverse of multiplication is division. Divide both sides by 50 mL.
[tex]\frac{450 \ atm*mL}{50 \ mL}= \frac{P_2 * 50 \ mL}{50 \ mL}[/tex]
[tex]\frac{450 \ atm*mL}{50 \ mL}= P_2[/tex]
The units of milliliters will cancel.
[tex]\frac{450 \ atm}{50 }= P_2[/tex]
[tex]9 \ atm =P_2[/tex]
The new pressure is 9 atmospheres.
What is the pH of a solution of HCL with a concentration of
5 x 10^-4
WILL GIVE BRANLIEST!!! Methane, CH4 is a __ (polar, nonpolar) molecule. In a molecule of methane, the primary intermolecular forces are ___ (London dispersion forces, dipole dipole forces, hydrogen forces, hydrogen bonding)
Answer:
Nonpolar; London dispersion forces
Explanation:
Complete them with correct formulas
Then balance them
Answer:
1. 2Ca + N[tex]_{2}[/tex] → 2CaN
2. 4Li + O[tex]_{2}[/tex] → 2Li[tex]_{2}[/tex]O
3. 2KCl + BaF[tex]_2[/tex] → 2KF + BaCl[tex]_2[/tex]
4. CH[tex]_4[/tex] + 2O[tex]_2[/tex] → CO[tex]_2[/tex] + 2H[tex]_2[/tex]O
Be sure to balance the number of atoms on both sides of each equation only by adding coefficients to the compounds!!!! Those without a coefficient are meant to have a coefficient of 1.
What kind of change is occurring (physical or chemical)? How do you know?
what is A magnet?Write its uses.
Answer:
Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.
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At what temperature will 2.50 moles of ideal
gas produce a pressure of 25.0 atm in a 10.0 L
container
Answer: 1,218K
Explanation:
what is Gay lussac's law
Explanation:
Gay-Lussac's law states that the pressure of a given mass of gas varies directly with the absolute temperature of the gas when the volume is kept constant. Mathematically, it can be written as: {\displaystyle {\frac {P}{T}}=k}. It is a special case of the ideal gas law.
what is the specific heat of a 150g metal that gives off 700J of heat upon cooling from 54 to 32 degrees C
Answer:
-0.21 if you're using C as your temperature.
0.018 if you're using K as your temperature.
Explanation:
This is similar to your other question, where we'll be using the formula for specific heat capacity: Q=mcΔT
Q = heat energy (Joules)
m = mass (g)
c = specific heat capacity > What we're solving for.
ΔT = change in temperature > final temp. - initial temp.
It would be helpful to know the units so you'll know what type of problem you're dealing with and what formula you should use. But you'll usually use this formula if they mention the specific heat of an material.
Let's plug in what we know.
700= (150)(c)(32-54)
700= (150)(c)(-22) we want to solve for c, to make it easier let's multiply the numbers on the right side so we'll have...
700=-3300c
Solve for c.
[tex]\frac{700}{-3300}[/tex] = c
-0.21 = c
This is in C though, your depending on your teacher they might want you to convert C to Kelvin (K). So Here is what it would be if it was in Kelvin.
700= (150)(c)(251)
700=37650c
0.018=c
What do we mean when we say atoms bond together?
Answer:
When two or more atoms chemically bond together, they form a molecule. Sometimes the atoms are all from the same element.
A Compound.
Explanation:
For example, when three oxygen atoms bond together, they form a molecule of ozone (O3). If a molecule forms from atoms of two or more different elements, we call it a compound.
Hope this helps!!
Which of the following statements correctly describes a kingdom in the Domain
Eukarya?
A Kingdom Protista includes single-celled organisms that lack nuclei.
B Kingdom Animalia includes multicellular organisms that make their own food.
C Kingdom Plantae includes multicellular organisms that can move independently.
D Kingdom Fungi includes organisms that get energy by absorbing materials in their
environment.
Answer:
D. Kingdom Fungi includes organisms that get energy by absorbing materials in their environment.
Explanation:
Organisms in the domain Eukarya are characterized by the possession of a well defined NUCLEUS in their cells. Kingdoms in this domain include animalia, plantae and fungi.
- Kingdom animalia contains multicellular organisms that are strictly heterotrophic i.e. cannot synthesize their own food, hence, rely on other organisms for nutrition.
- Kingdom plantae contains multicellular organisms that are capable of movement but not independently i.e. they cannot move from their fixed positions.
- Kingdom Fungi includes organisms that get energy by absorbing materials in their environment via a structure called MYCELIUM.
6. The gas in a steel cylinder is at 55 °C and a pressure of 965 mmHg. What would be the temperature,
in Celsius, when the pressure is 850 mmHg?
Answer:
91.4°C
Explanation:
Gay - Lussac Law => T ∝ P => T = kP => k = T/P with volume (V) and mass (n) constant.
For two different Temperature (T)-Pressure (P) conditions
k₁ = k₂ => T₁/P₁ = T₂/P₂ => T₂ = T₁(P₂/P₁)
T₁ = 55°C = (55 + 273)K = 328K
P₁ = 965 mmHg
T₂ = ?
P₂ = 850 mmHg
T₂ = T₁(P₂/P₁) = 328K(850 mmHg/965 mmHg) = 364K = (364 - 273)°C = 91.4°C
find the mass of an object on earth if its weight is 100N
what is the weight of an object on a planet with gravity of 2m/s^2 and mass 4 kg
if an object has mass of 200 g on earth what is its weight
find the force of an object if its mass is 6 kg and its on earth
finf the mass of an object if its force is 150 N and a = 10 m/s^2
Answer:
0.19 kg
8 N
1.964 N
58.86 N
15 kg
Explanation:
w = Weight of an object = 100 N
g = Acceleration due to gravity of Earth = [tex]9.81\ \text{m/s}^2[/tex]
m = Mass of an object
Weight is given by
[tex]w=mg\\\Rightarrow m=\dfrac{w}{g}\\\Rightarrow m=\dfrac{100}{9.81}\\\Rightarrow m=10.19\ \text{kg}[/tex]
Mass of the object is 0.19 kg
g = [tex]2\ \text{m/s}^2[/tex]
m = 4 kg
[tex]w=mg\\\Rightarrow w=4\times 2\\\Rightarrow w=8\ \text{N}[/tex]
Weight of the object is 8 N.
m = 200 g
[tex]w=mg\\\Rightarrow w=0.2\times 9.81\\\Rightarrow w=1.964\ \text{N}[/tex]
Weight of the object is 1.964 N.
Weight is the force the Earth exerts on an object which is on the surface of the Earth.
m = 6kg
[tex]w=mg\\\Rightarrow w=6\times 9.81\\\Rightarrow w=58.86\ \text{N}[/tex]
The force of the object is 58.86 N.
w = 150 N
a = g = [tex]10\ \text{m/s}^2[/tex]
[tex]m=\dfrac{w}{g}\\\Rightarrow m=\dfrac{150}{10}\\\Rightarrow m=15\ \text{kg}[/tex]
Mass of the object is 15 kg.
If the solubility of a N30 gas is 2.26g/l at 1.26atm of pressure, what is the solubility of
the gas at 0.02atm?
0.12g/L
0.41g/L
0.04g/L
0.27g/L
How many moles of solute would you need to add to 500mL solution to get a
molarity of 3.7 mol/L?
Answer:
7.4 moles solute
Explanation:
From definition of Molarity (M) = moles solute (n)/volume of solution in Liters(V)
=> moles solute (n) = Molarity (M) x Volume (L) = (3.7 moles/L)(0.500L) = 7.4 moles solute
Which of the following statements correctly describes the greenhouse effect
Plz help (it’s a picture)
Answer:
Shown below
Explanation:
Molar mass: 149.09
% Nitrogen: 28.2
% Hydrogen: 8.1
% Oxygen: 43.0
% Phosphorus: 20.8
Which refers to solid ice that condenses and forms on surfaces like grass or windows?
dew
frost
hail
sleet
Frost refers to solid ice that condenses and forms on surfaces like grass or windows.
WHAT IS FROST?Frost refers to a deposit of small white ice crystals formed on solid surfaces when the temperature falls below freezing temperature.
Frost forms when the temperature of the atmosphere is below freezing i.e. < 0°C.
Therefore, frost refers to solid ice that condenses and forms on surfaces like grass or windows.
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one of many cells in the retina of the eye that responds to low light. VOCABULARY
Answer:
I hope this helps you!
Explanation:
The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. ... The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for color vision.
The retina is the back thing of the eye that has the cells that respond to the light. These specialized cells are known as photoreceptors.