Answer:
Insecticides are not good for health. Their use is harmful to other animals, birds and humans. But, without their use, it is not possible to grow the required amount of food. So, "the use of insecticide is not an interest, but an obligation".
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.
4Al + 3O2 --> 2Al2O3 coefficients
Answer:
coefficients: 4, 3, 2
Explanation:
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. :)
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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
What are the most likely dates of the full moon
Answer:
C
Explanation:
Answer C Full moon occurs approx 2weeks after new moon
please help. im having trouble with this question
Answer:
It's b
Explanation:
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.
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Which property describes a mixture? select three options. it can be separated by physical methods. it has a single chemical composition. it can appear different from different sources. it cannot be described by a chemical symbol or formula. it cannot have more than one state of matter.
The property of mixture which describes a mixture are it can be separated by physical methods, it can appear different from different sources and it cannot be described by a chemical symbol or formula.
What are mixtures?Mixtures are the compounds which are formed by the addition or combination of one or two elements or compounds.
As in the mixtures many states of matters are present and it will be filtered by using various physical methods, and it is not chemically shown by single chemical symbol or formula. Mixtures are also of two types:
Homogeneous mixtures are those in which equal compositions all over the volume is present.Heterogeneous mixtures are those in which different composition all over the volume is present.Hence options (1), (3) and (4) are correct.
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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)
Helpppppppppppppppppp
Answer:
Ch4-Methane ( 5 atoms )
CO2- Carbon Dioxide ( 3 atoms )
H2O- Water ( 3 atoms )
2O2- Oxygen ( 2 atoms )
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.
What type of change will alter the makeup of the elements or molecules of a substance?
A. chemical
B. physical
C. reactor
Microwaves make _________ get hot. They make water molecules _______ against each other. The water molecules turn into ___________ and _____________ the popcorn.
please help
Answer:
food , push , gas , pop
Explanation:
what is emission spectrum and absorption spectrum?
Answer:
When matter interact with EMR then spectrum is obtained. We can understand both spectra using Bohr's hydrogen spectrum. let's have a look on Bohr's hydrogen spectrum what does it say. It says when a electron gains energy it moves from one energy level to other(lower to higher) which is Absorption phenomenon. When the electrons returns from excited state to ground state they emits several spectral lines. this spectrum is called as emission spectrum. inshort the
Emission spectrum is spectrum of electromagnetic radiations that were emitted from the higher energy state(Excited state) to lower energy state(Ground state). and study of emission spectrum is known as AES (Atomic Emission spectroscopy).
When an atom or ion is subjected to EMR, it absorbs certain level of radiations, and when this absorbed energies are studied under spectroscopy they are plotted as absorption spectrum, and study of Absorption spectrum is known as AAS (Atomic Absorption spectroscopy).
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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:
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
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.
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 _______________.
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)
Will give brainliest
sorry i know this:
4. 2 methyl 2 heptene
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:)
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.
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
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
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.
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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 >_<
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:
6. Cu + FeSO4
single replacement
Answer:
CuSO4 + Fe
Explanation:
this is because Cu will displace Fe from it's position
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.)
what challenges arise when nuclear material is removed from a power plant?
Answer:
it destroy the surrounding area
