Answer:
298.15 K.
Explanation:
Room temperature is generally taken to be 25 °C (around 77 °F). 0 °C is equivalent to 273.15 K, so we add 273.15 to 25 to find that room temperature is around 298.15 K
Explain how you would determine the amount of g in 1.7 mol of Al(OH)2 and give your answer.
Answer:
103.7 grams
Explanation:
[tex]Al(OH)_{2}[/tex]
Al: 1 * 26.98 = 26.98
O: 2 * 16.00 = 32.00
H: 2 * 1.01 = 2.02
26.98 + 32.00 + 2.02 = 61.00
[tex]\frac{1.7mol}{1}[/tex] * [tex]\frac{61.00g}{1mol}[/tex] = 103.7 grams of [tex]Al(OH)_{2}[/tex]
I need help!
It’s question 2!
Answer:
A
Explanation:
Tectonic plates beneath the Earth's surface and crust are always shifting. Earthquakes occur when two plates shift or slip and cause a rupture which then starts an earthquake.
If 220 grams of C3H8 react with 20 grams of O2, how much CO2 can be formed?
Answer:
Explanation:
Identify the element:
1. 1s22s22p63s1
2. [Kr] 5s24d105p
Answer:
1. Sodium, Na
2. You left out the last number of the problem, so I will give you all six possibilities for the last 5p orbital:
5p1: Indium, In
5p2: Tin, Sn
5p3: Antimony, Sb
5p4: Tellurium, Te
5p5: Iodine, I
5p6: Xenon, Xe
How many days is 1.6 x 10^7 minutes?
[tex](1.6 \times {10}^{7}) \: min \times \frac{1 \: hour}{60 \: min} \times \frac{1 \: day}{24 \: hour}[/tex]
[tex] = 11111.11111 \: days[/tex]
(round as you wish)
What are the coefficients of the balanced reaction? _CH4 + _CI2 ➡ _CCI4 + _HCI
Answer:
CH4 + 4Cl2 --> CCl4 + 4HCl
Explanation: Message me if you need a thorough explanation
Which of these characteristics will produce the most water dense water
Answer:
High salinity, low temperature.
Explanation:
A lot of salt is left behind. This leads to water with very high salinity
The salinity of the water increases as more salt is dissolved in it. High temperature, density and salinity produce the most dense water.
What is salinity of water ?Salinity influences the physical properties of water, such as density and heat capacity, together with temperature and pressure.
When two water samples of the same volume are compared, the water sample with the higher salinity will have more mass and be more dense.
The ocean's salinity is raised by both sea ice production and ocean water evaporation. However, processes that reduce salinity, such as the ongoing inflow of fresh water from rivers, precipitation of rain and snow, and melting of ice, constantly balance out these "salinity rising" causes.
Thus, salinity ,density and high temperature produce the water dense.
To learn more about salinity of water refer the link below;
https://brainly.com/question/3096437
#SPJ2
WHOEVER ANSWERS A GOOD ANSWER I WILL GIVE BRAINLIEST!
What would happen to the rate of evaporation if you moved all the containers outdoors into direct sunlight?
Answer:
Molecules contained in a liquid evaporate from the surface area. This means that the larger the surface area, the faster the rate of evaporation. ... This means all the other factors that affect the rate of evaporation are identical. Leave the containers for one hour.
Explanation:
Answer:
Evaporation would accelerate.
Explanation:
Direct sunlight increases the thermal energy on the containers, increasing evaporation.
Is this a balanced equation? 4NH3+ 5O2 – 4NO + 5H20
Answer:
The reaction is not balanced.
Explanation:
The reaction expression is given as:
4NH₃ + 5O₂ → 4NO + 5H₂O
In a balanced reaction equation, the number of atoms on both sides of the expression is the same.
Now let us investigate;
Elements N H O
Reactants 4 12 10
Products 4 10 9
We see that the number of H and O on both sides of the expression is not the same. The reaction is not balanced.
which two types of rock could form after other rock melts into liquid magma
a. sedimentary
b. metamorphic
c. extrusive igneous
d. intrusive igneous
Answer:
a, b
Explanation:
look at rock cycle charts, I knew this since 2nd grade
Answer:
its c and d
Explanation:
I took the test got 100%
According to the rate law, how do concentrations affect rate?
O A. The rate increases as concentrations decrease.
OB. The rate is independent of concentrations.
O C. It is impossible to tell how the rate is affected.
O D. The rate increases as concentrations increase.
Answer:
Explanation:
d
please help which one is it
Answer:
17 g
Explanation:
I need help with this question ASAP this should have 2 answers
Answer:
The correct answer is B. and C. according to me!
Answer:
A. and C.
no explanation...
Which substance contains only one kind of atom?
O A. aluminum
B. ethanol
O C. salt
D. water
Answer:
A
Explanation:
Because ethanol consists C H and O formula C2H5OH
Formula of salt is NaCl
Formula of water is H2O
But fórmula of Aluminum is just Al
aluminum reacts with 42g of iron(ii) sulfate. How many grams of iron are formed?
Answer:
15.44 gm
Explanation:
Hope it is helpful....
1. How many carbon atoms react in this equation?
2C4H10 + 1302 = 8C02 + 10H2O
A. 2
B. 4
C. 6
D. 8
ns
im not so sure but I think the answer is 8. Sorry if im wrong
What is an ion atom?
Which feature of a rosebush is an adaptation for defense?
A. Sharp thorns
B. Showy flowers
C. Deep roots
D. Compound leaves
Brandlist to who help
Answer:
sharp thorns
Explanation:
hope this helps
Answer:
A
Explanation:
Beacause if an animal tries to eat the rose the animal would get chopped by the thorns
dedin acid it bubbles and gives off a vas.
What is the name of this gas?
b
Explain how you would test for this gan
Answer:
hydrogen
Explanation:
it is normaly found in acid
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Explanation:
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Which is one factor that describes a Mediterranean climate?
has many trees
is found in inland areas
has cool and rainy winters
has little to no precipitation
PLEASE I WILL MARK BRAILIEST AND GIVE 30 PTS
Answer:
dry
polar
highlands
temperate marine
temperate continental
Explanation:
i need help please asap
Answer:
Bonding in chemistry is known as chemical bonding which means the interaction or attraction between molecules.
Chemical bonds are of different type such as ionic, covalent, hydrogen, and metallic. Ionic bonds are formed by the transfer of valence electron from one atom to other and there is unequal distribution of electrons between two or more atoms. Ionic bonds forms two oppositely charges ions positively charged (loses electron) or negatively charged (gains electron).
Covalent bond are the strong chemical bonds that form due to equal sharing of electron pairs between atoms. They form a stable element and have stable attraction or repulsive forces.
Brainliest and more points if you do all 3
A 328-g sample of water absorbs 5.78 × 103 J of heat. Calculate the change in temperature for the water. If the water is initially at 25.0 °C, what is its final temperature?
Answer:
The change in temperature for the water is 4.21 C and its final temperature is 29.21 C
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
Q= 5.78*10³ J c= 4.186 [tex]\frac{J}{g*C}[/tex] m= 328 g ΔT= Tfinal-TinitialReplacing:
5.78*10³ J= 4.186 [tex]\frac{J}{g*C}[/tex] *328 g* ΔT
Solving:
ΔT= [tex]\frac{5.78*10^{3} J }{4.186\frac{J}{g*C}*328 g}[/tex]
ΔT= 4.21 C
Being ΔT= Tfinal - Tinitial and Tinitial=25 C, then:
4.21 C= Tfinal - 25 C
4.21 C + 25 C= Tfinal
29.21 C= Tfinal
The change in temperature for the water is 4.21 C and its final temperature is 29.21 C
1
The process of a solid turning into a liquid is called
Answer:
Melting
Explanation:
Once heat is added it will turn to a liquid
Melting is the process of turning solid to liquid.
A teacher wants to perform demonstration that illustrates both chemical and physical changes. Which would be the best demonstration that she could use? A) bending a piece of aluminum B) breaking a matchstick C) dissolving sugar in water D) burning a candle
Answer:
D) burning a candle
A demonstration that contains both physical and chemical changes will be BURNING OF A CANDLE.
This is because when a candle is lighted up, on the top of it (where we see flame) the oxygen and other gases present around will be chemically changed (burned up)
When the wax in the top of the candle will get melted due to the heat of the fire a physical change takes places.
What is always true of a strong base?
A. It does not dissociate at all in solution.
B. None of the original base remains in solution.
C. It partially dissociates into ions in water.
D. It forms a very concentrated solution when dissolved in water.
Explanation:
None of the original base remains in solution.
Answer:
C
Explanation:
How can you find the number of protons from the nuclide symbol?
It is the difference in the mass number and atomic number.
It is half the number in the upper left (half the mass number).
It is the number in the lower left (atomic number).
It is the number in the upper left (atomic number).
It is the number in the upper left (mass number).
Answer: It is the number in the upper left (atomic number).
Explanation: The atomic number is normally the number of protons. I hope this helps.
What happens when Na forms an ionic bond?
O it gains one electron and becomes a -1 anion
it loses one electron and becomes a +1 cation
It loses 2 electrons and becomes a + 2 cation
It shares electrons with the other atom in the bond
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
in this also 1st option is correct because na is also a metal and metal gains electron...
Which statement is completely accurate?
Atoms of the same element can have different numbers of neutrons.
Atoms of the same element can have neutrons but exist without protons.
Atoms of the same element always have different numbers of neutrons.
Atoms of the same element always have different atomic weights.
Answer:The same chemical element can have a different number of neutrons and still be the same element. We refer to the atoms of the same element with different numbers of neutrons as "isotopes"
Explanation:
Write the word and balanced chemical equations for the reaction between:
Potassium hydroxide + hydrochloric acid
Answer:
Potassium hydroxide + Hydrochloric acid → Potassium chloride + Water.
potassium hydroxide + hydrochloric acid = neutralisation