Answer:
I think its false hope I helped pliz mark brainlist
(URGENT) will mark brainliest if you help me answer this
Question 1 options:
OH-
H+
Question 2 options:
OH-
H+
Question 3 options:
soap
bleach
apple juice
ammonia
Question 4 options:
lemon juice
bleach
milk
stomach acid
Question 5 options:
0-3
8-10
0-6
8-14
Question 6 options:
0-3
8-10
0-6
8-14
Question 7 options:
sour
bitter
sweet
salty
Question 8 options:
slippery
brittle
malleable
corrosive
Question 9 options:
slippery
brittle
malleable
corrosive
Question 10 options:
sour
bitter
sweet
salty
Answer:
For Q1: H+
For Q2: OH-
for Q3: Apple juice
For Q4: bleach
For Q5: 0-6
For Q6: 8-14
For Q7: Sour
For Q8: Corrosive
For Q9: Slippery
for Q10: Bitter
Explanation:
What is the mass in grams of 5.67 x 1021 molecules of carbon dioxide?
Answer:
5789.07
Explanation:
the volume of 9.0 M HCl needed to make 200.0 ml of 0.4 M HCl is?
Answer:
4.2 mL
nxnxhxhxhchxhxxhxhx
Which statement describes a reaction at 298 K if AH = 31 kJ/mol, AS = 0.093
kJ/(mol-K)?
O A. Gibbs free energy is negative.
B. It is at equilibrium.
C. It is exothermic.
D. It is not spontaneous.
Answer: (D) it is not spontaneous.
How many moles of H2O(I) are formed from 3.85 mol of propane?
Answer:
15.4 moles
Explanation:
15.4 moles
in an experiment 3.425g of lead oxide was reduced to form 3.105g of lead the empirical formula of the lead oxide is?
Answer:
Pb3O4
Explanation:
According to this question, 3.425g of lead oxide was reduced to form 3.105g of lead in an experiment. Since lead oxide contains both lead (Pb) and oxygen (O) element,
Mass of lead oxide = 3.425g
Mass of lead = 3.105g
Mass of oxygen = (3.425g - 3.105g) = 0.320g
Next, we convert each mass value to mole by dividing by respective molar mass
Pb = 3.105g ÷ 207.2 = 0.0149mol
O = 0.320g ÷ 16 = 0.02mol
Next, we divide each mole value by the smallest (0.0149)
Pb = 0.0149mol ÷ 0.0149mol = 1
O = 0.02mol ÷ 0.0149mol = 1.342
Multiply each ratio value by 3 to get:
Pb = 1 × 3 = 3
O = 1.342 × 3 = 4.026
The whole number ratio, approximately, of Pb and O is 3:4, hence, their empirical formula is Pb3O4.
Sulfur trioxide is a gas that reacts with liquid water to produce aqueous sulfuric Acid or acid rain what is the equation for this reaction do not worry about balancing the equation.
Answer:
SO₃(g) + H₂O(l) → H₂SO₄(aq)
Explanation:
The molecular formula for the involved species are:
Sulfur trioxide = SO₃. ("trioxide" indicates the presence of 3 oxygen atoms).Water = H₂OSulfuric acid = H₂SO₄With the above information in mind we can proceed to write the reaction equation:
SO₃(g) + H₂O(l) → H₂SO₄(aq)Which two elements have similar properties and 8 electrons in their
outermost shells?
O A. Neon and argon
B. Fluorine and chlorine
C. Lithium and sodium
D. Magnesium and calcium
Answer:
A
Explanation:
because they both belong to the Same group eight
How are islands formed? Include plate boundary type.
Answer:
they form when continential plates collide.
Balance this equation (step by step please)
Answer:
[tex]K_{2}CrO_{4} + Pb(NO_{3})_{2} >> 2 KNO_{3} + PbCrO_{4}[/tex]
Reactions:
[tex]K_{2}CrO_{4} + Pb(NO_{3})_{2} >> KNO_{3} + PbCrO_{4}[/tex]
Explanation:
In the reaction, the CrO4(Chromate) is a compound NO3(Nitrate) is a compound as well.
Ignore the number in front of the reaction first, calculate how many K, Cr, O, Pb and N in the equation for both left and right side.
Left side: K=2, Cr=1, Pb=1, N=2, O=10
Right side: K=1, Cr=1, Pb=1, N=1, O=7
So we need 3 more oxygen, 1 more nitrogen and 1 more potassium on the right.
If we add a 2 in front of KNO3, there will be 2 potassium, 2 Nitrogen and 6 oxygen, which the reaction complete.
Conclusion:
[tex]K_{2}CrO_{4} + Pb(NO_{3})_{2} >> 2 KNO_{3} + PbCrO_{4}[/tex]
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..
A toy plane with a mass of 1.5kg is flying in the air at 8.0m/s.what is its kinetic energy?
Answer:
48 Joules
Explanation:
Givens
m = 1.5kg
v = 8.0 m/s
Formula
KE = 1/2 m v^2
Solution
KE = 1/2 * 1.5 * 8.0^2
KE = 1/2 * 1.5 * 64
KE = 48 Joules
Given the following equation: C2H60 + 302 + 3H2O + 2CO2
If 2.0 moles of CO2 were produced, how many moles of O2
reacted?
Answer:
Explanation:
2 or 3 is correct
Answer: 3.0 moles
Explanation:
write the chemial formula for H3PO4
Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a weak acid with the chemical formula H3PO4.
Pls help I will give brainlist
Answer:putis
Explanation:
ai domti now
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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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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For the readion 2Na + Ch> 2NaCl, how many grams of Ch are required to read completely with 450 g Na
71.6g
6.09g
3.54g
21.1g
Help! I’ll give brainiest and don’t mind the answer i put .
Need help will mark brainliest!!
I need help with that.
Answer:
The three main cycles of an ecosystem are the water cycle, the carbon cycle and the nitrogen cycle. These three cycles working in balance are responsible for carrying away waste materials and replenishing the ecosystem with the nutrients necessary to sustain life.
Explanation:
cycles such as the water cycle keep the earth hydrated by feeding rain to trees, plants, etc.
Which one(s) make an atom neutral?
a. electron
b. proton
C. proton and neutron
d. electron and proton
Answer: its D
Explanation:
Which type of bonds does potassium form? Which type of bond is most
common?
Answer:
forms an ionic bond. Potassium and iodine have very different electronegativities. The two atoms would form an ionic bond since ionic bonds form between atoms with a large difference in electronegativity
Explanation: look it up
HELLLPP QUICK WILL MARK BRAINLIEST
Answer:
c
Explanation:
list the five groups in the periodic table
Answer:
I think these are the 5 periodic tables.
Question is in the photo
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.
how many grams of NaBr are in 20.5 L at STP
Answer:
94.15
Explanation:
how many protons does gold have
Answer:
gold has 79 protons
Explanation:
i looked it up lol
How does heat enhance the rate of chemical reaction? Explain in short.
Answer: the heat is rapidly changing
Explanation: as the heat continues to rapidly change so does the chemical as it also starts to change, so in a way you could use the example of a skateboard moving. This is because theres also friction in the skateboard which is made from the two things moving together and the heat is slowly increasing causing a reaction to the skateboard wheels so in a way it can cause more rapid changes
With the increase in heat or temperature, the rate of reaction will increase as more molcules will get kinetic energy for effective collisions.
What is the rate of the chemical reaction?The rate of reaction can be d as defined the speed at which the products are fromed from the reactants. The rate of a reaction provides information on how much time under which a chemical reaction can be completed.
The rate of a chemical reaction can be defined as the speed of the conversion of the reactants into products with time. Some reactions are instantaneous, while some chemical reactions take time to achieve the final equilibrium.
In some reactions, a catalyst can be used to increase the rate of the reaction. The catalyst provides the speed to the reaction in both forward and backward reactions by lowering the activation energy.
The pressure of the gaseous reactants increases, and the concentration of gases results in an increase in the rate of reaction. With an increase in the temperature, the average kinetic energy of the reactant molcules will be raised.
Therefore, more molecules will go under effective collisions. Therefore, the rate of reaction will be increased.
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