Answer:
0.67
Explanation:
Molality is mols of solute over kilograms of solvent
there are 58/174 mols of solute, and 0.5 kg of solvent
(58/174)/0.5=0.6666...
Round to the nearest hundreth to get 0.67
4Al + 3O2 --> 2Al2O3 coefficients
Answer:
coefficients: 4, 3, 2
Explanation:
Flame __________ __________ is an instrumental method of analysing metal ions in solutions. What are the 2 missing words in this sentence?
Answer:
emission spectroscope
Explanation:
The flame emission spectroscope is a scientific instrument based on flame testing.
At body temperature, 2404 J is required to evaporate 1 g of water. After vigorous exercise, a person feels chilly because the body is giving up heat to evaporate perspiration. A typical person perspires 25 mL of water after 20 minutes of exercise. How much body heat is used to evaporate this water
Answer: - 1.45 kJ
Explanation:
Using q = m x C x (ΔT)
Given : m = 3.8 g , C = 0.900 J/g°C, = -(450-25)°C = -425°C (Since final temperature is less than the initial, the sign is negative)
q = (3.8 g) x (0.900 J/goC) x ( -425 °C)
= -1453.5 J
= -1.45 kJ
Note that negative sign of q indicates that this much heat is released, when the metal cools down.
please help. im having trouble with this question
Answer:
It's b
Explanation:
what challenges arise when nuclear material is removed from a power plant?
Answer:
it destroy the surrounding area
(Science)
(Quarter 4)
Solve the puzzle game's to have 5 point's
(BEGIN)
( •O•)!?
| |
| |
| |______|________
|________|_____ |
| |
(FINISH)
(real question)
can you know why Sam is nosebleeding
_ ~
(> ㅍuㅍ)>
Explanation:
because of blood pressure
Solid calcium carbonate reacts with hydrochloric acid, forming aqueous calcium chloride, carbon dioxide
gas, liquid water
help balance
Answer:
When hydrochloric acid comes into contact with calcium carbonate, the following chemical reaction ensues: CaCO3 + 2HCl → CaCl + CO2 + H2O, which provides acid neutralization alongside the formation of byproducts
Answer:
C) liquid
Explanation:
edge 2023
What is another name for a Grasshopper?
Answer:
The scientific name of the grasshopper is Caelifera.
Explanation:
hope this helps.
Answer:
caelifera
Explanation:
that’s the scientific name >_<
Predict: How do you think you could use the Gizmo to make the color gray? _____________
_________________________________________________________________________
Observe: Change the Red, Green, and Blue values to 90. What color does this produce?
_________________________________________________________________________
Grey basically is formed by combining black and white colors together.
In this case, one would have to explore other options.
What kind of colors will form grey?The following color combinations can form grey:
By adjusting the other colors, variations of hue will be observed. It is to be noted that the Gizmo is unaccessible on this platform hence the general answer.
Read more about colors at:
https://brainly.com/question/4431200
which two products are formed when lipids are broken down
Answer:
Fatty acids and glycerol.
Explanation:
I hope this helps! :)
(The process is called lipolysis by the way)
How does pathogen infection result in the occurrence of fevers in a host?
Edema caused by the pathogen raises the body temperature..
The pathogens break down the host's hypothalmus..
Pyrogens produced by the pathogen alter the host thermostat.
The interaction between PAMPs and PRPs causes a respiratory burst.
Answer:
The answer is Edema caused by the pathogen raises the body temperature. :)
Have an amazing day!!!
Please rate and mark brainliest!!
what volume of N2 is required to convert 5.0L of hydrogen gas to ammonia? assume that all gases are at the same temperature and pressure and that the reaction is complete
Answer:
Approximately [tex]1.7\; {\rm L}[/tex].
Explanation:
Nitrogen [tex]{\rm N_{2}}\, (g)[/tex] reacts with hydrogen [tex]{\rm H_{2}}\, (g)[/tex] at a [tex]1:3[/tex] ratio to produce ammonia [tex]{\rm NH_3}\, (g)[/tex]:
[tex]{\rm N_{2}}\, (g) + 3\; {\rm H_{2}}\, (g) \to 2\; {\rm NH_{3}}\, (g)[/tex].
The ratio between the coefficient of [tex]{\rm N_{2}}\, (g)[/tex] and the coefficient of [tex]{\rm H_{2}}\, (g)[/tex] is:
[tex]\begin{aligned}\frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}[/tex].
Under the ideal gas assumptions, the same ratio would apply to the volume of [tex]{\rm N_{2}}\, (g)[/tex] and [tex]{\rm H_{2}}\, (g)[/tex] in this reaction:
[tex]\begin{aligned}\frac{V({\rm N_{2}})}{V({\rm H_{2}})} = \frac{n({\rm N_{2}})}{n({\rm H_{2}})} = \frac{1}{3}\end{aligned}[/tex].
[tex]\begin{aligned}V({\rm N_{2}})= \frac{1}{3}\, V({\rm H_{2}})\end{aligned}[/tex].
Given that [tex]V({\rm H_{2}}) = 5.0\; {\rm L}[/tex]:
[tex]\begin{aligned}V({\rm N_{2}}) &= \frac{1}{3}\, V({\rm H_{2}}) \\ &= \frac{1}{3}\times 5.0\; {\rm L} \\ &\approx 1.7\; {\rm L}\end{aligned}[/tex].
(Rounded to [tex]2[/tex] significant figures.)
Complete:
If two or more elements or chemical compounds come into contact with one another and there is enough ________________present, a chemical change may take place.
a. When a substance undergoes a chemical change, the chemical ______________of the substance is altered.
b. A chemical change can also be called a chemical _______________.
question has to do with chemistry and is in the picture.
Answer:
the answer is 69
Explanation:
hope this helps
have an awesome day -TJ
Helpppppppppppppppppp
Answer:
Ch4-Methane ( 5 atoms )
CO2- Carbon Dioxide ( 3 atoms )
H2O- Water ( 3 atoms )
2O2- Oxygen ( 2 atoms )
help me my homework pls
Answer:
1. Boron B 13 2 Non-Metal
2. Aluminium Al 13 3 Metal
3. Tin Sn 14 5 Metal
4. Helium He 18 1 Non- Metal
5. Neon Ne 18 2 Non- Metal
6. Calcium Ca 2 4 Metal
7. Francium Fr 1 7 Metal
8. Gold Au 11 6 Metal
NO LINKS PLEASE! Why does dye dropped into a cup of water eventually spread throughout the water?
A. The water has lattice vectors.
B. The water undergoes a phase transition.
C. The water particles and dye particles exhibit Brownian motion.
D. The water exerts pressure on the container.
Answer:
C
Explanation:
okay, you need to look at the structures of the particles of matter in the solid, liquid and gas.
particles in a solid are in fixed positions, where they can only vibrate in those positions ( take a look at ice, or rather, a brick)liquids have very small or rather, no spaces between them, but they can slide or rub against each other, like people in a really tight crowd I guessgas particles have very large spaces between them and they move randomly. these exibit what's called brownian motion.since water particles (and all other liquid particles) have negligible spacings and limited movement, that allows the dye particles to move from a region of high concentration to that of a low concentration. the aim for this is for the mixture/solution to reach an equilibrium, that is the mixture must get to a point where all regions have the same concentration of the dye.you can refer to your coursebooks :)
correct where wrong please:)
6. Cu + FeSO4
single replacement
Answer:
CuSO4 + Fe
Explanation:
this is because Cu will displace Fe from it's position
cacoH2+2NH4Cl-cacl2+2H2O+HN3
A. how many grame of cacl2 will be formed from the of
A20gm of cacoH2
B 40gm of NH4Cl
Answer:
a 63.428gm
b 41.5 gm
Explanation:
a
70 gm CaCOH2=111gm of CaCl2
40 gm =(111*40)/70
=63.428gm
b
107 gm of NH4Cl =111 gm of CaCl2
40 gm gives =(111*40)/107
=41.5 gm
Which weather condition is NOT associated with warm fronts??
Answer:
A Winter storm usually does not come with a warm fronthey warm front.
Explanation:
When the front passes over an area it means to change in the weather. Many. Many friends cause weather events such as rain thunderstorms gusty winds tornadoes and hurricanes.
What type of change will alter the makeup of the elements or molecules of a substance?
A. chemical
B. physical
C. reactor
help! this is science, Palmas is closer to the equator than Neuquén. Which location has a warmer air temperature and why?
Answer:
Palmas, because more energy is transferred from the sun directly to the surface and then from the surface to the air.
Explanation:
Hope this helps:)....if not then sorry for wasting your time and may God bless you:)
An envelope could be a source of DNA evidence.
True
False
Answer:
True
Explanation:
DNA can be extracted from bite marks, cigarette buds, postage stamps on envelopes, and envelope flaps for DNA analysis.
Answer:
false. a envelope is what the DNA evidence goes in
Explanation:
What part of defense would likely be affected if the pathogen contained a mutation in it's pathogen-associated molecular patterns (PAMPs)?
the pathogen would secrete greater amounts of toxins...
the pathogen would not be able to penetrate the host's physical barriers.
the pathogen might not be recognized by the host.
the pathogen would be easily recognized by the host's TLRs.
Answer:
The pathogen might not be recodnised by the host :)
Here is a link to learn more!!
https://brainly.com/question/13859016
Have an amazing day!!
Please rate and mark brainliest!!
complete and balance the following equation b. na2 co3
the question isnt clear where are the products ir the reactants like __ = ___ + ___
A 4M solution means there are
______ moles of ______
per one _____ of _____.
There are _____ ml within _____ Liter.
Q. How many moles of HCL are within 2,000ml of a 0.4M solution of HCL?
Q. How many grams of KCl are within 2L of a 0.4M KCL solution?
Answer:
Molarity=number of moles÷volume(L)
What are the most likely dates of the full moon
Answer:
C
Explanation:
Answer C Full moon occurs approx 2weeks after new moon
If you have a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2, what is the resulting temperature in K
The resulting temperature of a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2 is 31.8K.
How to calculate temperature?The temperature of a given gas can be calculated by using the ideal gas law equation:
PV = nRT
Where;
P = pressure V = volume n = number of molesR = gas law constantT = temperatureno of moles of Cl2 = 76.33g ÷ 70.91g/mol = 1.08mol
2.35 × 1.2 = 1.08 × 0.0821 × T
2.82 = 0.088T
T = 2.82/0.088
T = 31.8K
Therefore, the resulting temperature of a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2 is 31.8K.
Learn more about temperature at: https://brainly.com/question/11464844
How does a noncompetitive inhibitor decrease the rate of an enzyme-catalyzed reaction?.
Answer:
In fact, the inhibitor and substrate don't affect one another's binding to the enzyme at all. However, when the inhibitor is bound, the enzyme cannot catalyze its reaction to produce a product. Thus, noncompetitive inhibition acts by reducing the number of functional enzyme molecules that can carry out a reaction.
chlorine water exposed to sunlight equation?
Answer:
Cl2 (aq) + 2H2 O HOCl(aq) + Cl-(aq) + H2O Equation 1 The hypochlorous acid dissociates almost immediately into hydrogen and hypochlorite ions (OCl-).
Explanation:
