Answer:
Its Br on Ap ex
Explanation:
Just got it wrong ;( it's B
write three characteristics of mandleef's periodic table?
Answer:
The periodic table is composed of seven horizontal rows or periods and is numbered between 1 and 7. There is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right. The periodic table is composed of eight vertical columns or groups. They are numbered between 1 to 8.
Explanation:
Which object shares similar physical properties with a bar of soap
Answer:
objects with little friction, and little density
Explanation:
substances such as, jelly share similar physical properties
9. Which type of reaction is shown by the equation below?
PAO10(s) + 6 H20 (1) ► 4 H3PO4(ay)
Synthesis
Combustion
оооо
o
Double replacement
Decomposition
0.38 L of HNO3 is titrated to equivalence using 0.14 L of 0.2 MNaOH. What is the concentration of the HNO3HNO3
Answer:
0.074M is concentration of the HNO₃ solution
Explanation:
The reaction of neutralization of nitric acid, HNO₃ with NaOH is:
HNO₃ + NaOH → H₂O + NaNO₃
Where 1 mole of nitric acid reacts per mole of NaOH
Based on the chemical reaction, the moles of NaOH at equivalence point are equal to moles of HNO₃ presents in the solution. With the moles and the volume we can find molarity as follows:
Moles NaOH = Moles HNO₃:
0.14L * (0.2mol NaOH / L) = 0.028mol NaOH = 0.028mol HNO₃
Molarity:
0.028mol HNO₃ / 0.38L =
0.074M is concentration of the HNO₃ solutioni need help ASAP why does detergent turn white in the water when it’s mixed with water
Answer:
because the soap and the water mix and make bubblesl
Explanation:
A 3.45 L container has a pressure of 2.14 atm and contains 0.461 mol of gas. What is the temperature inside the container?
100 points!!
Answer:
the temperature of gas inside the container is 195.2 K.
Explanation:
Given;
volume of gas in the container, V = 3.45 L
pressure of gas in the container, P = 2.14 atm
number of gas moles, n = 0.461 mol
The temperature of gas inside the container is calculated as;
[tex]PV = nRT\\\\T = \frac{PV}{nR}[/tex]
where;
R is gas constant = 0.08205 L.atm/mol.K
[tex]T = \frac{2.14 \ \times \ 3.45}{0.461 \ \times \ 0.08205} \\\\T = 195.2 \ K[/tex]
Therefore, the temperature of gas inside the container is 195.2 K.
A room that is 500 cm x 400 cm x 250 cm contains 65 kg of air. Determine the volume of air in the room and its density.
Answer:
1.3g/L is the density of the air
Explanation:
The room is full of air, the space that the air occupy is:
500 cm x 400 cm x 250 cm = 5.00x10⁷ cm³
The density of a substance is defined as the ratio between the mass of the substance and the space that occupy. We can express the density of air in g/L:
Grams air:
65 kg * (1000g / 1kg) = 65000g
Liters:
5.00x10⁷ cm³ * (1L / 1000cm³) = 50000L
Density:
65000g / 50000L =
1.3g/L is the density of the airIf the pressure in a gas container that is connected to an open-end U-tube manometer is 116 kPa and the pressure of the atmosphere at the open end of the tube is 752 mm Hg, the level of mercury in the tube will
Answer:
The level of mercury in the tube will be 118 mmHg
Explanation:
As per the given data
Pressure of container = P1 = 116 kPa
Pressure of atmosphere = P2 = 752 mmHg
First, we need to convert the pressure of the container in mmHg as follow
P1 = 116 kPa x [tex]\frac{1 atm}{101.325 kPa}[/tex] x [tex]\frac{760 mmHg}{1 atm}[/tex] = 870 mmHg
Hence the pressure in the container is higher than the pressure of the atmosphere and the mercury level will increase.
Now calculate the level of mercury in the tube as follow
Level of Mercury = Pressure of container - Pressure of atmosphere
P = P1 - P2
P = 870 mmHg - 752 mmHg
P = 118 mmHg
A student mixes baking soda and vinegar in a glass. Do you think any new substances are being created in this mixture? If so, how do you know?
Answer:
A student mixes baking soda and vinegar in a glass. ... Yes I do belive that new substances are being formed because there is a chemical reaction between the baking soda and vinegar turning it into a bubbly substances instead of a powder and liquid.
Explanation:
ANSWER
The evidence here is that when you mix baking soda or baking powder and vinegar, the bubbles you saw were carbon dioxide gas.
A carbon dioxide gas is molecules consist of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas.
if a -2 ion has 34 protons, what element is it?
ANSWER
Selenium has 34 protons
What happens to frequency as wavelength
decreases across the electromagnetic
spectrum?
A. Frequency increases.
B. Frequency decreases.
C. Frequency stays the same.
D. Frequency and wavelength are not
related.
Answer:
B. Frequency decreases
a solution of calcium chloride contains 35.0 g calcium chloride 425.0 g water. what is the percentage by mass of calcium chkoride in this solution
Answer:
[tex]\% m/m =7.61\%[/tex]
Explanation:
Hello!
In this case, since the percentage by mass of a solute in a solvent is computed as shown below:
[tex]\% m/m=\frac{m_{solute}}{m_{solute}+m_{solvent}} *100\%[/tex]
Now, as the solute here is calcium chloride and has a mass of 35.0 g and the solvent is water with a mass of 425.0 g, we can compute the percentage by mass as shown below:
[tex]\% m/m = \frac{35.0g}{35.0g+425.0g} *100\%\\\\\% m/m=7.61\%[/tex]
Best regards!
what is the boiling point of water at the top of mount everest where the atmospheric pressure is only 34% as strong
This question is incomplete, the complete is;
Water has a heat of vaporization (ΔHvap) of 44.01 kJ mol-1 and boils at 100 degrees C at sea level.
What is the boiling point of water at the top of Mount Everest where the atmospheric pressure is only 34% as strong as the pressure at sea level?
Answer: the boiling point of water at the top of mount Everest where the atmospheric pressure is only 34% as strong is 74 °C
Explanation:
Given that;
P1 = 1 atm,
T1 = 100°C = 373 K
P2 = P1 × 34% = 1×0.34 = 0.34 atm
T1 = ?
ΔH = 44.01 kJ mol⁻¹ = 44.01×10³ J/mol
R = 8.314 J/k.mol
now using the Clausius - Clapeyron equation;
p1_∫^p2 d.InP = ΔHvap/R T1_∫^T2. 1/T².dT
⇒ In(P2/P1) = ΔHvap/R (1/T1 - 1/T2)
so we substitute;
ln( 0.34/1 ) = ( 44.01×10³ / 8.314) × ( 1/373 - 1/T2)
-1.0788 = 5293.4808 × ( 0.00268 - 1/T2)
-1.0788 = 14.1865 - 5293.4808(1/T2)
5293.4808(1/T2) = 14.1865 + 1.0788
5293.4808(1/T2) = 15.2653
(1/T2) = 15.2653 / 5293.4808
(1/T2) = 0.0028837
T2 = 1 / 0.0028837
T2 = 346.8 K
WE convert to Celsius
t2 =346.8 K − 273.15 = 73.65 °C ≈ 74 °C
Therefore, the boiling point of water at the top of mount Everest where the atmospheric pressure is only 34% as strong is 74 °C
What is the part of the cartridge that actually flies outward (the projectile)?
Answer:
the culotte, the fulminant capsule and the sheath or cap together with remains of powder
Explanation:
A bullet has a nose, sheath or casing, a short propellant charge, and a capsule.
All these components are part of the vouchers. The classification of these is in metallic and semi-metallic.
The cartridge can be given as the combination of the bullet, case, propellant, and primer. The bullet is the part that moves outwards in a projectile.
What is the projectile motion?The projectile motion can be given as the expulsion of the object from the external force, and the movement governed by the gravity and downward force.
The cartridge is the combination of the bullet, case, propellant and the primer.
The bullet is the projectile, the case functions in holding the cartridge parts together, propellant provides the energy for the launch of the projectile, and the primer functions in igniting the propellant.
The force exerted leads to the flushing of bullet in the projectile motile.
Learn more about cartridge, here:
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can y’all please help me
Which term represents an intermolecular force in a sample of water?
1. hydrogen bonding
2. covalent bonding
3. metallic bonding
4. ionic bonding
Answer:
hydrogen bonding
Explanation:
PLEASE HELP ITS DUE IN 1 HOUR!!!!!!
Answer: Sorry I try to download it but it not showing anything, if you take a picture of the work maybe I would do it....
Explanation:
1. Genes are the basic unit capable of transmitting characteristics from one point
generation to the next.
What happened to the missing neutron?
•it will turn into a proton and an electron
•it became gamma radiation
•it got absorbed by the electrons
Answer:
it became gamma radiation, it will turn into a proton and an electron
Explanation:
Chlorhexidine gluconate is available in different products in concentrations of 4% w/v and 0.12% w/v. How many milliliters of the more dilute product may be prepared from each fluidounce of the more concentrated product
Answer:
From each fluidounce, 985.78 milliliters of the more dilute product can be produced.
Explanation:
From the given information:
4% w/v = 4g of solute in 100 mL of solution
0.12% w/v = 0.12g of solute in 100 mL of solution
Since 1 fluidounce = 29.5735 ml
∴
100 mL of solution contains 4g of solute
29.95735 ml will have [tex]\dfrac{4}{100} \times 29.5735[/tex]
= 1.18294g solute
Thus, 1 fluidounce contains 1.18294g solute
So, for the dilute solution, 0.12 g solute yields 100 mL solution
∴ 1.18294g will have [tex]\dfrac{100}{0.12} \times 1.18294[/tex]
= 985.78 ml
What does the law of the conservation of momentum state?
Answer:
The conservation of momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion. ... Momentum is conserved in all three physical directions at the same time.
Bone Injuries
Practices/Activities on How To
Avoid the Injuries
Fracture
Dislocation
Sprain
Answer:
1.=fracture.... Balance: Consider balance training and physical therapy if your body feels off. Use a cane or walker if you need to.
2.=dislocation.... Wearing protective gear during contact sports.
3.=sprain...Take precautions to prevent falls, such as holding handrails on stairways, avoiding slippery surfaces, and keeping your floors uncluttered.
The practices/activities which should be done to avoid the following injuries
include
Fracture- Balance training should be done by individuals as it helps to strengthen the muscles and relieve some of the load the bones are being subjected to in ensuring proper support for the body.Dislocation- Precautions such as wearing of protective gears and proper lightning should be done to prevent individuals from falling and getting bones dislocated. The protective equipment also help to reduce the effect of force on joints which may cause dislocation.Sprain- Activities which involve stretching the muscles of the body should be frequently done to prevent such type of injuries.Read more on https://brainly.com/question/20885020
A sample of an unknown compound is vaporized at 150.°C . The gas produced has a volume of 960.mL at a pressure of 1.00atm , and it weighs 0.941g . Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound.
Answer:
34.02 g.
Explanation:
Hello!
In this case, since the gas behaves ideally, we can use the following equation to compute the moles at the specified conditions:
[tex]PV=nRT\\\\n=\frac{1.00atm*0.960L}{0.08206\frac{atm*L}{mol*K}*(150+273)K} =0.0277mol\\\\[/tex]
Now, since the molar mass of a compound is computed by dividing the mass over mass, we obtain the following molar mass:
[tex]MM=\frac{0.941g}{0.0277mol} \\\\MM=34.02g/mol[/tex]
So probably, the gas may be H₂S.
Best regards!
For every pound a company spends on advertising, it spends £0,75 on its website. Express the
amount spent on advertising to the amount spent on its website as a ratio in its simplest form.
What is the edge length of a 369-g iron cube?(The density of iron is 7.86 g/cm3, and the volume of a cube is equal to the edge length cubed.)
Answer:
edge length = 3.61 cm
Explanation:
Givens
m = 369 gm
d = 7.86 gm / cm^3
v = ?
Formula
v = m / d
Solution
v = 369 / 7.86
v = 46.95 cm^3
============
That's not the answer. You must take the cube root of the volume
side = cube root (46.95)
side = 3.61 cm
The Edge length of the iron cube will be "3.61 cm".
Given values,
Weight of iron cube,
m = 369 g
Density of iron,
d = 7.86 g/cm³
The volume of iron cube will be:
→ [tex]V = \frac{m}{d}[/tex]
[tex]= \frac{369}{7.86}[/tex]
[tex]= 46.95 \ cm^3[/tex]
As we know that the volume of cube is "[tex]a^3 \ cm^3[/tex]".
hence,
→ [tex]a^3 = 46.95 \ cm^3[/tex]
or,
→ [tex]a = (46.95 \ cm^3)^{\frac{1}{3} }[/tex]
[tex]= 3.61 \ cm[/tex]
Thus the above answer is correct.
Learn more:
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1. A 40,000 kg plane is accelerating at a rate of 4m/s2. How much force does the engine put forth?
Answer:
160000
Explanation:
F=ma
m=40000
a=4
if a 40,000 kilogram plane is accelerating at a rate of 4 meters/second², then the force generated by the engine would be 160000 Newtons.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem we have to find out the force generated by the engine of the plane if a 40,000-kilogram plane is accelerating at a rate of 4 meters/second²,
The mass of the plane = 40000 kilograms
The acceleration of the plane = 4 meters/second²
The force generated by the engine of the plane = 40000×4
= 160000 Newtons
Thus, the engine would generate a force of 160000 Newtons.
To learn more about Newton's second law here, refer to the link;
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#SPJ2
When sound waves move through a medium, in what direction to do the particles in the medium move?
5. A car has a gasoline tank with a capacity of 18.0 gallons. How many liters is this equal to? (- 2.1134 pints, gallon = 4 quarts , 1 quart = 2 pints)
Answer:
16.14 liter
Explanation:
The tank capacity of a car is a measure of the amount of gallons or liters of liquid a tank (of any shape e.g. rectangular, cylindrical) can hold at maximum due to its volume. The S.I unit of the tank capacity is the m³, but it can be measured in liters, gallons and any other unit of volume.
We need to convert the volume from gallons to liters
1 gallon = 3.78541 liters
18 gallon = [tex]18\ gallon*\frac{3.78541\ liter}{1\ gallon} =16.14\ liter[/tex]
In the Minnesota Department of Health set a health risk limit for benzene in groundwater of . Suppose an analytical chemist receives a sample of groundwater with a measured volume of . Calculate the maximum mass in milligrams of benzene which the chemist could measure in this sample and still certify that the groundwater from which it came met Minnesota Department of Health standards. Be sure your answer has the correct number of significant digits.
Answer:
3.10 × 10⁻⁴ mg
Explanation:
In the Minnesota Department of Health set a health risk limit for benzene in groundwater of 10.0 μg/L. Suppose an analytical chemist receives a sample of groundwater with a measured volume of 31.0 mL. Calculate the maximum mass in milligrams of benzene which the chemist could measure in this sample and still certify that the groundwater from which it came met Minnesota Department of Health standards. Be sure your answer has the correct number of significant digits.
Step 1: Given data
Concentration limit (C): 10.0 μg/LVolume of the sample (V): 31.0 mLStep 2: Convert "V" to L
We will use the conversion factor 1 L = 1000 mL.
31.0 mL × 1 L/1000 mL = 0.0310 L
Step 3: Calculate the maximum mass of benzene (m)
We will use the following expression.
m = C × V = 10.0 μg/L × 0.0310 L = 0.310 μg.
Step 4: Convert "m" to mg
We will use the conversion factor 1 mg = 1000 μg.
0.310 μg × 1 mg/1000 μg = 3.10 × 10⁻⁴ mg
18. Predict the products for this single replacement reaction.
Cuso, + ALS
AL(S03)2 + Cu
Al(S0.)2 + Cu
O Al(SO.), + Cu
NR
19. Predict the products for this double replacement reaction.
Baci, + H,PO->?
BaPO4 + HCI
BaPO. + HCl
Ba(POJZ + HCI
Ba,(PO.)2 + HCI
PLEASE HELP ITS FOR A TEST I WOULD APPRECIATE IT !!
Answer:
3rd response
4th response
Explanation:
i lowkey feel like im doing this whole chem exam for u lol. good luck anyway! u rock!
