Answer:
The answer is B
Explanation:
A solution that contains a relatively low concentration of solute is called dilute, and one with a relatively high concentration is called concentrated. If we add more salt to a saturated solution of salt, we see it fall to the bottom and no more seems to dissolve.
When sodium azide is activated in an auto-
mobile airbag, nitrogen gas and sodium are
produced according to the equation
2 NaN_(s) —> Na(s) + 3N2(g).
If 0.42 mol of NaN3 reacts, what mass of
nitrogen would result?
Answer in units of g
Answer:
17.64 grams of nitrogen gas will be produced when 0.42 moles of sodium azide decomposes in the automobile airbag.
Explanation:
From the equation of reaction given below:
2 NaN₃ (s) ----> 2 Na (s) + 3 N₂
Two moles of sodium acid will decompose to produce two moles of sodium atom and three moles of nitrogen gas.
Mole ratio of sodium azide to nitrogen gas is 2 : 3
0.42 moles of sodium azide will produce 3/2 × 0.42 moles of nitrogen gas when It decomposes
Moles of of nitrogen gas produced = 0.63 moles
Molar mass of nitrogen gas = 2 × 14 = 28 g
Mass of nitrogen gas produced = 0.63 × 28 g
Mass of nitrogen gas produced = 17.64 g
Therefore, 17.64 grams of nitrogen gas will be produced when 0.42 moles of sodium azide decomposes in the automobile airbag.
- What is the concentration of hydrogen ions if the pH is 12?
Answer:
1 x 10^-12 mol dm^-3
Explanation:
[H+] = 10 ^ -pH
Therefore, pH 12 = 1 x 10^-12 hydrogen ion concentration
when and if element 119 is discovered predict where it would be placed on the modern periodic table
Answer:yes
Explanation:
Because modern periodic table is designed in such a way that it can accomodate any new elemet which may be discovered in future
We have that for the Question "when and if element 119 is discovered predict where it would be placed on the modern periodic table" it can be said that With the existing information the element 119 will most likely be i the 8th period and the first group of the periodic table
8th period and the first group of the periodic tableFrom the question we are told
when and if element 119 is discovered predict where it would be placed on the modern periodic table
Generally
The Periodic table is naturally designed to accommodate new elements based on there properties
Therefore
With the existing information the element 119 will most likely be i the 8th period and the first group of the periodic table
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Exam
How many miles are there in
12,327 feet?
Answer:
2.3346591
or round to 2.3
Answer:
2.335 miles
Explanation:
2.335 miles is in 12,327 feet.
1 How many different elements (types of atoms) are in this molecule C14H9Cl5?
Which animal response to environmental stimuli is being shown by this map?
camouflage
B)
hibernation
C)
migration
D)
mimicry
The animal shows environmental response by the process of Hibernation, migration, defense, & courtship.
Here in the map, the stimulus is a behavior that is shown in relation to how the animals cope with the environment.
Such as hibernation is the method of sleeping through the entire winter season and waking up in the summer or spring season when food is available in plenty. All the ground animals such as snakes, bears and beavers tend to hibernate.Learn more about the stimuli is being shown by this map.
brainly.com/question/1216346.
plant cells are the only type of cell with a cell wall
true
false
?
Answer:
true
Explanation:
All cells have a cell wall. Plant cells are surrounded by a cell membrane and outside this is a fairly rigid cell wall. The cell wall gives the plant cell a more definite shape than an animal cell. Animal cells do not have a cell wall.
Answer:
True
Explanation:
Animal cells don't have any cell walls while plants do
1. organisms of different species that share similar characteristics most likely have..
2. some members of a species are able to withstand very hot weather conditions due to..
Answer:
1. Parents from both species.
2. Because of natural selection.
Explanation:
how many liters are in 1.5 moles of h2 ?
Answer:
34.35 liters
Explanation:
After setting up the formula using the mole map, you would get 1.5 (mol) times 22.4 (liters)
when is an electric charges neutral ??
Answer:
Atoms of matter are electrically neutral because their nuclei contain the same number of protons as there are electrons surrounding the nuclei. Electric current and charged objects involve the separation of some of the negative charge of neutral atoms.
I NEED THIS ANSWER ASAP!!!
What volume of hydrogen (STP) is produced by dissolving 1.1 moles of aluminum in sulfu- ric acid? 2 Al(s) + 3 H2SO4 → Al2(SO4)3 + 3H2
Answer in units of L.
Answer:
37 L
Explanation:
Reaction is: 2 Al (s) + 3H₂SO₄(aq) → Al₂(SO₄)₃ (s) + 3H₂ (g)
2 moles of Al react to 3 moles of sulfuric acid, in order to produce 1 mol of aluminum sulfate and 3 moles of hydrogen.
So ratio between aluminum and hydrogen is 2:3. We assume the acid is the limiting reactant.
2 moles of Al can produce 3 moles of hydrogen
Then 1.1 moles of Al, will produce (3 . 1 .1)/2 = 1.65 moles
If 1 mol of any gas, occupies 22.4L at STP
1.65 moles of H₂ may ocuppy (1.65 . 22.4) / 1 = 36.96 L ≅ 37L
If we had applied Ideal Gases Law → P . V = n . R .T
At STP. we have 1 atm and 273 K
V = (n . R . T) / P → (1.65 . 0.082 . 273) / 1 = 36.9 L
what is a hydrocarbon
Answer:
A hydrocarbon is any of a class of organic chemicals made up of only the elements carbon (C) and hydrogen (H).
Explanation:
What is the mass in grams of 5.67 x 1021 molecules of carbon dioxide?
Answer:
5789.07
Explanation:
Which of these is not an impact caused by the Asian carp
a
The carp eat native species
b
The carp increase the biodiversity of an area
c
The carp damage boats and boating equipment
d
The carp take up most of the space
Carp do take up space, and damage boats, and they are invasive so they dont increase the biodiversity of an area because biodiversity is different species and a variety of species in an area.
The answer is B because the Asian Carp does not increase the biodiversity in an area.
Which one(s) make an atom neutral?
a. electron
b. proton
C. proton and neutron
d. electron and proton
Answer: its D
Explanation:
which location on the map above marks the Weddell Sea?(Giving brainlist for correct answer)
-A
-B
-C
-D
Answer and Explanation:
D. I think..
The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of...
Answer: increasing frequency or energy and decreasing wavelength.
Explanation:
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light i.e
The electromagnetic spectra consist of radio waves, microwaves, infrared ,Visible , ultraviolet, X rays and gamma rays arranged in order of increasing frequency or increasing energy and decreasing wavelengths.
Identify the acid, base, conjugate acid, and conjugate base in the following reaction.
HNO3 + NH3 + NO3 + NH
HNO3
NH3
NO3
NHA!
Base
Acid
Conjugate acid
Conjugate base
Please answer ignore the answers below in the pic they are wrong
What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
Answer:
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.
75 mL of water is measured in a graduated cylinder. The mass of the water should be
A.
more than 75 grams
B.
less than 75 grams
C.
there is no good way to tell
D.
75 grams
Answer:
D-75 grams
Explanation:
that is the answer
HELP! WILL MARK BRAINLEST 12 PTSOrganize: Use the graphic organizer below to organize three factors that increase the speed a solute dissolves in a liquid.
Answer:
i cant see the pic fully
Explanation:
Answer:
Increasing surface area/making particles smaller (like breaking a sugar cube into smaller pieces so that it covers more area), mixing , increasing temperature.
PLS HELP DUE IN ONE HOUR The atomic size of atoms increases as you move from top to bottom within a group of
the periodic table. Please explain why the size increases. Limit your response to one
sentence. Use your own words to answer.
Answer:
Within a group trend
Explanation:
The atomic radius of atoms generally increases from top to bottom within a group trend. As the atomic number increases down a group, there is again an increase in the positive nuclear charge. As the atomic number increases within a period, the atomic radius decreases.
_____ is an example of a heterogeneous mixture.
A)
Tea
B)
Salad
0
Salt
D)
Mayonnaise
B) Salad
heterogeneous mixtures have a non-uniform composition with components in at least two different phases
Please choose the correct sequence that describes the excitement of an atom.
Such an electron transition raises the atom from the ground state to the excited state.
When energy is added to an atom from an outside source, its electrons move to a higher energy level (orbit)
As a result, the atom emits a photon.
When the atom is in an excited state, the electron can drop from the higher energy level to a lower energy level.
A) 2, 1, 4, 3
B) 4, 3, 2, 1
C) 3, 4, 1, 2
D) 1, 2, 3, 4
A battery lighting a bulb is an example of ____energy converting to____energy.
magnetic
electrical
chemical
gravitational
heat
nuclear
kinetic
CaSO4 +
Al(NO3)3
+
Al; (507)
Ca(NO3)2
Answer:
what are you looking for?
Explanation:
As Earth orbits the Sun, the seasons slowly change from one to the other. 5 points
Which of the following statements explains the occurrence of summer in
the Northern Hemisphere?
Earth is closest to the Sun in summer.
The Northern Hemisphere is tilted toward the Sun in summer.
The Northern Hemisphere is tilted away from the Sun in summer.
All parts of Earth receive more sunlight in summer.
Answer:
The Northern Hemisphere is tilted toward the Sun in summer is the correct answer.I hope this helps
Explanation:
Day turns into darkness as the Earth spins, and summer turns into winter when the Earth completes its whole cycle. Therefore, the Northern Hemisphere is tilted toward the Sun in summer. The correct option is option B.
What is rotation?The circular motion of an item about its center is referred to as rotation. Things can spin in a variety of ways. When a round, three-dimensional object rotates around an imaginary line inside of its center, it is a relatively common type of rotation. This focal point is known as an axis.
The Earth's rotation and revolution effect wind patterns, temperature, ocean currents, and precipitation, which together determine our local weather and the planet's overall climate. the Northern Hemisphere is tilted toward the Sun in summer.
Therefore, the Northern Hemisphere is tilted toward the Sun in summer. The correct option is option B.
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In sweet pea plants, the allele for purple flowers is dominant over the allele for white flowers. If half of the plants in one generation of sweet pea plants has purple flowers, what were the most likely genotypes of the parents?
Explanation:
The genotype for parent is going to be purple flower.
After the crossing is done, we have our p1 to be a purple flower dominant over the the yellow that is to say the parent genotype is going to be a Purple denote a capital P
in terms of ionic charge explain why the ratio of ions is 3:2
Heating Curve Question
How much energy is required to raise the temperature of 88 grams of water at 48°C to steam at 138°
Answer:
Q = 33105.6 J
Explanation:
Given that,
Mass of water, m = 88 grams
The temperature raised from 48°C to steam at 138°.
We need to find the energy required to raise the temperature. The formula for the energy required is given by :
[tex]Q=mc\Delta T[/tex]
Where
c is specific heat of water, c = 4.18J/g °C
So,
[tex]Q=88\times 4.18\times (138-48)\\\\Q=33105.6\ J[/tex]
So, the required energy is 33105.6 J.