Answer:
Explanation:.the device controlled the activation as shown by the water holding room temperature for 15 seconds until activation by crushing the pills. The temperature rose 30° over two minutes, showing a measurable exothermic reaction from the Calcium Chloride dissolving in the water. Pour 5mL water in a quart bag Place Thermometer in the bag to make contact Fill two gelatin 000 capsules with 1 gram of Calcium Chloride Place capsules into the bag Wait 15 seconds to crush the capsules while they are submerged in the water Temperatures - 0 Seconds 75° 15 Seconds - Activation 75° 30 Seconds 85° 60 Seconds 95° 90 Seconds 104° 120 Seconds 105° Test #2 For this trial, the variables of the water Calcium Chloride will be increased by the factor of one.
A 7.0 L sample of gas begins at 2.5 atm and 320. K. What is the new pressure if the temperature is changed to 273 K and the volume remains constant at 7.0 L?
Answer:
2.1 atm
Explanation:
We are given the following variables to work with:
Initial pressure (P1): 2.5 atm
Initial temperature (T1): 320 K
Final temperature (T2): 273 K
Constant volume: 7.0 L
We are asked to find the final pressure (P2). Since volume is constant, we want to choose a gas law equation that relates initial pressure and temperature to final pressure and temperature. Gay-Lussac's law does this:
[tex]\frac{P_{1}}{T_1} =\frac{P_{2}}{T_2} \\[/tex]
We can rearrange the law algebraically to solve for [tex]P_{2}[/tex].
[tex]{P_{2}} =\frac{(T_2)(P_{1} )}{T_1} \\[/tex]
Substitute your known variables and solve:
[tex]P_2 = \frac{273K(2.5atm)}{320K} = 2.1 atm[/tex]
What is the pOH of a substance when [H+] = 5.4 x 10^-8 M
Answer:
pOH = 6.73
Explanation:
First, calculate pH = -log[H+] = -log(5.4 x 10^-8) = 7.27
pOH + pH = 14, so pOH = 14 - 7.27 = 6.73
how many electrons will be in the valence of non- H atoms when they make covalent bonds?
Answer:
Please one time click here
Mark brainliest
Based on the data what can be inferred about the biotic factors of this religion
Answer:
I would say the answer is D
Explanation:
A solution has a volume if 259 mL and contains 0.70 mol MaCl. What is its molarity
Answer:
2.8 m
Explanation:
:)
At a certain grocery store a 0.500 pound container of ground cinnamon cost $6.98 (excluding tax). Cinnamon has a density of 0.560 g/Ml. How much would 500.0 mL of cinnamon cost?
Answer:
The cinnamon cost would be "$8.62". A further explanation is given below.
Explanation:
Cinnamon's density,
= 0.560 g/ml
On converting it into g, we get
= [tex]0.560\times 500[/tex]
= [tex]280 \ g[/tex]
Cinnamon's volume,
= 500 ml
As we know,
1 pound = 435.592 g
Now,
The cost pf cinnamon per pound will be:
= [tex]\frac{6.98}{0.5 \ pound}[/tex]
= [tex]13.96[/tex] ($) per pound
So,
Cinnamon's cost will be:
= [tex]250 \ g\times \frac{1 \ pound}{435.592 \ g}\times \frac{13.96}{1 \ pound}[/tex]
= [tex]8.62[/tex] ($)
As the water molecules re-freeze, what happens to the salt ions that are mixed in with the water?
Answer:
Explanation:
Since salt is composed of two ions Na+ and Cl- it will attract to the opposite poles of the water and form a ion-dipole bond. This will cause the phenomenon freezing point depression where as the name states it will take a lower tempertature to freeze it. So instead of freezing at 0 degrees c it will freeze at a negative 2 or so on.
The salt ions end up slowing the growth of ice as the water molecules re-freeze.
What is Depression at the freezing point?Freezing point depression can be defined as the decreasing of the freezing point of pure solvents upon the addition of different kinds of solutes.
Depression in the freezing point can be defined as a colligative property that is proportional to the molality of the solution.
As liquid water gets colder and colder, the motions of water molecules become slower and slower. When salt is added to water, the saltwater solution is composed of both water molecules and dissolved salt ions.
As a result, salt ions can easily replace some of the water molecules. Saltwater freezes more slowly than pure water due to many of the water molecules would be "crashing" into the ice's surface in pure water and are replaced by salt ions.
Therefore, the salt water will freeze at a lower temperature than the pure water.
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What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?
a. 0.23 mL
b. 4.34 mL
c. 479 mL
I am trying to figure out what blood type the father of my son could have since my son and I are both type A. Also, my brother is type o and my mom is A.
Answer:
It could probably be O.
Explanation:
Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive. For example, if an O gene is paired with an A gene, the blood type will be A.
Calculate the heat absorbed when 68.8 g of ice at -30.0 c is converted to steam at 160 c
Answer: 219 kJ
Explanation:
state the Constituents of the following alloys:magnalium and bronze
Which element would have a larger
atomic radius?
Magnesium (Mg)
Chlorine (CT)
Describe the bonding process when two hydrogen atoms combine to
form a diatomic molecule of hydrogen.
Answer:
The electrons located between the two nuclei are bonding electrons. A hydrogen molecule forms from two hydrogen atoms, each with one electron in a 1 s orbital. The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond. The bond is represented either as a pair of dots or as a solid line.
PLLZZZZ HELPPPP IT IS A TIME ASSIGNMENT !!!
Answer:
plato is the answer
Explanation:
that what i think it it is
Your car burns gasoline as you drive up a large mountain. What energy
transformation is the car performing?
O A. Chemical energy to kinetic energy and gravitational potential
energy
B. Kinetic energy to chemical energy and light energy
C. Chemical energy to kinetic energy and nuclear energy
D. Gravitational potential energy to sound energy and nuclear energy
SUBNI
Answer:
chemical energy to kinetic energy
Explanation:
Answer:
A. Chemical energy to kinetic energy and gravitational potential
energy
Explanation:
pls help what’s the answer?
Need help with this please help ASAP
Answer:
The correct answer would be -
17. 50% chances of round offspring
18. 25% chances two copies of dominant allele in the genotype of offspring
Explanation:
17. In this question it is stated that the Spongebob is heterozygous and has a square body which means the square body is dominant over the round that is present in sponge Susie that means she has two copies of the recessive allele.
S for square trait and s for a round trait then
S s
s Ss ss
s Ss ss
Thus, the correct answer is 50 percent as there are only two copies of ss.
18. in this question Patric and Patti both have heterozygous for the pink (P) body-color dominant over yellow (p). The chances for the true-breeding dominant genotype would be -
P p
P PP Pp
p Pp pp
There is only one out of four rue-breeding dominant offspring will be produced.
Please help ASAP I’ll mark you as brainlister:(((!!!!!!!!
Answer:
c. Gas particles don't interact
Explanation:
Ideal gas particles do not interact with each other.
The gas molecules do not interact with each other except for colliding with each other. Gases expand to completely fill a container; they would not if they were attracted to each other. That being said, they obviously still do, as a result of Dalton's Law.
13. An organic compound is found to contain 77.42% of C, 7.53% of H and
nitrogen. The mass of 1.12L of its vapour at NTP is 4.65g. Determine
the
empirical and molecular formula of the compound.
Answer
7.53% 97% if you divide it you can get the answer
Explanation:
An atom or bonded group of atoms with a positive or neqative charge
Answer:
Radical
Explanation:
Wait did I get your quiz right? Are you asking for the name? If so it's radical
PLZ HELPP!!! WILL GIVE EXTRA POINTS AND BRAINLIEST!!! DUE IN 15 MINUTES!!!
As a scuba diving air tank is filled with air, the air is compressed in the tank to as much as 3000 psi of pressure. When filling the tank, it is observed that the tank becomes warmer.
Which argument BEST explains why this occurs?
A
When air is compressed, it turns solid. A short time later, the air evaporates back into a gas which releases heat.
B
When air is compressed, the molecules line up into a crystalline structure. As the molecules line up, they release energy in the form of heat.
C
When air is put into the tank, it expands rapidly, thereby raising the temperature.
D
Air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature.
Answer:
The gas under pressure subjected to heat can cause the tank to explode. A scuba tank filled to capacity with compressed air at 3000 psi could just as easily go up to 3400-3500 psi if heated
Explanation:
Air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature. Hence option D is correct.
What is pressure?Pressure is defined as the force applied perpendicularly to an object's surface divided by the surface area over which it is applied. The movement of the molecules and the collisions they have with one another and the vessel walls cause the pressure to build up. According to general relativity theory, pressure contributes to the mass-energy cause of gravity by making a gravitational field stronger.
The tank may blow up if the gas within was under pressure and exposed to heat. If heated, the pressure of a scuba tank filled to capacity with compressed air at 3000 psi may readily increase to 3400-3500 psi. Because air molecules are free to move, the temperature in the tank rises as more air is introduced, as the molecules move and collide more quickly.
Thus, air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature. Hence option D is correct.
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How many moles of methane gas are in 44.8 L of CH at STP?
Answer:
2 mol CH 4
Explanation:
43.8 x L
---------------- = 2 mol CH 4
22.4 x L x mol - 1
An intravenous solution of mannitol is used as a diuretic to increase the loss of sodium and chloride by a patient. If a patient receives 30.0 mL of 25% (m/v) mannitol solution, how many grams of mannitol were given?
Answer:
Explanation:
25 % ( m / v ) mannitol solution means 25 gram in 100 cc of water
25 gram in 100 mL of water
grams of mannitol in 30 mL = 25 x 30 / 100
= 7.5 grams .
What are the formulas for the products of the reaction:
Calcium Chloride + Silver Nitrate →
CaAg + ClNO3
CaNO3 + AgCl2
CaAg + ClN
CaNO3 + AgCl
Ca(NO3)2 + AgCl
Answer:
CaCl2 + 2AgNO3 = Ca(NO3)2 + 2AgCl
Explanation:
Calcium chloride reacts with silver nitrate to produce calcium nitrate and silver(1) chloride
SeS3 covalent compound name?
Answer:
Selenium trisulfide
Oday, you will observe drops of liquid water and compare them to drops of liquid isopropanol, noting whether either liquid evaporates. Given that the energy transferred in from the air will be the same for both liquids, make a prediction about whether both drops or only one drop will evaporate within five minutes. Explain your prediction below.
Answer:
Liquid isopropanol.
Explanation:
Liquid isopropanol will evaporate earlier than water because the boiling point of isopropanol is less than water. That liquid which have high boiling point require more heat energy for change into vapor state as compared to those liquids that has low boiling point. The isopropanol has boiling point i.e. 82.5 °C while on the other hand, water has boiling point i.e. 100 °C so we can say that isopropanol will evaporate first.
The liquid that will be the first to evaporate within 5 minutes is; Liquid Isopropanol
We have the 2 liquids as;
Liquid Isopropanol
Liquid water
Now, since we are dealing with the one that will evaporate within five minutes, we need to know their boiling points.
From online research;
Boiling point of liquid isopropanol is 82.5°C
Boiling point of liquid water is 100°C
Now, we are told that the same energy is transferred for both liquids. However, boiling point of the liquid with the lower boiling point will be achieved first and as a result will evaporate first since the next stage after boiling point is evaporation of steam.
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what is the SI unit that represents the amount of substance?
Answer:
Mole
Explanation:
In solids, amount of substance is given by;
n = mass/molar mass
n will have a unit of mole
However, in liquids, amount of substance is;
n = concentration × volume
Again, n will be in mole
Thus, the SI unit that represents the amount of substance is mole
How can you tell if an ion is a polyatomic ion if all you have is the name?
I can't seem to figure this out! Please help me out!
:)
Answer:
All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
Answer: All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
Explanation:
DO 25 through 37 WRITE IF ITS TRUE OR FALSE FOR EACH ONE. ILL MARK YOU AS BRAINLIEST IF YOU COMPLETE IT AND ALSO SEND ME YOUR CASHAPP NAME SO I SEND YOU $25.
What is the correct illustration of the bonding that occurs in H2O?
Answer:
covalent is the bonding that occurs in H2O
Explanation: