Answer:
C = (m / M) / (V / 1000) = (10 / 170) / (750 / 1000) = 0.078 M
Explanation:
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How does the water help a fossil form?
The answer is 1
Please help with these two I’ll give you brainiest!
what is the mass of 0.23 moles of CF4? *
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Answer:
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When two continental plates diverge, there is a valley in between these two plates that forms as the continental crust widens. What geological event is
a result of this interaction?
A) Hurricanes
B) Volcanoes
C) Tsunamis
D) Earthquakes
Answer:
B. Volcanoes
Explanation:
B. Volcanoes
Answer:
B:Volcanoes
Explanation:
because valley rift develops
Do all materials respond to heat in the same way?
Answer:
No.
Materials like water get evaporated when heated, but materials like camphor get sublimed that is they directly get converted into gaseous form when heated, while materials like copper gets melted on heating
Write the net ionic equation of HNO3+Fe--> Fe(HNO3)2 +H2
Answer:
nitric acid + iron=iron+[nitric acid ] 2 hydrogen
The net ionic equation will be Fe → [tex]Fe^{2+}[/tex].
What is net ionic equation?The net ionic equation would be a chemical equation which only indicates the elements, compounds, as well as ions instantly involved in a chemical reaction.
The given chemical equation is:
HNO3+Fe → Fe(HNO3)2 +H2
It can be written in term of ionic equation.
[tex]H^{+}[/tex] + [tex]NO_{3}^{-}[/tex]+Fe → [tex]Fe^{2+}[/tex] + [tex]H^{+}[/tex] + [tex]NO_{3}^{-}[/tex]
Hydrogen ion and nitrate ion will be canceled each other.
Hence, the net ionic equation will be
Fe → [tex]Fe^{2+}[/tex]
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Variables – this experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve. (they drop an antacid in hot water and one in cold water)
• What is the independent variable? (2 points)
• What is the dependent variable? (2 points)
Explanation:
You can think of independent and dependent variables in terms of cause and effect: an independent variable is the variable you think is the cause, while a dependent variable is the effect. In an experiment, you manipulate the independent variable and measure the outcome in the dependent variable.
What medium do selsmic waves travel through?
A
The alr
B
The ground
C
Water
D
Outer space
HELP PLSSS
A 2.5 L container holds a sample of hydrogen gas at 297 K and 120 kPa.
If the pressure increases to 330 kPa and the volume remains constant, what will the new temperature be?
Round your answer to one decimal place.
Answer:
T2 = 816.8 ( To one d.p)
Explanation:
Volume= 2.5 L
Initial Temperature T1 = 297 K
Initial Pressure P1 = 120 kPa
Final Pressure P2 = 330 kPa
Final Temperature T2 = ?
The relationship between pressure and temperature is given by the equation;
P1 / T1 = P2 / T2
T2 = P2 * T1 / P1
Inserting the values;
T2 = 330 * 297 / 120
T2 = 816.75 K
I need help with this!
Answer:
FILTRATION.
filter the solution and separate sand and salt solution
evaporation
evaporate the water and salt mixture and salt will be left as a solid
Hydrogen gas and nitrogen gas are used to make ammonia (NH3). Calculate the rate of reaction if the concentration of hydrogen changed from 0.74 M to 0.088 M over 65
seconds
Answer:
(b) The change favors the reactants which has more gas molecules. ... Describe the effect of increasing the concentration of nitrogen gas or hydrogen gas inside the ... (c) The change causes an decrease in ammonia favoring the reactants. ... (c) Catalysts do not affect the equilibrium only the rate of reaction
As a human being, we are considered to be a ..... because we rely on other organism for food
Answer:
As a human being, we are considered to be a heterotroph because we rely on other organisms for food.
Weather conditions (high or low temperature) to the mineral wool.
Answer:
high temperature
Explanation:
Four identical flasks, at the same temperature and pressure, contain the gases CH4, H2, CO2 and Kr respectively. Which flask contains the greatest number of particles?
H2
CH4
CO2
Kr
all are the same
Answer:
All the gases have the same number of molecules.
Identify this reaction
HBr+ Al(OH)3 —-> H2O + AlBr3
Neutralization reaction
Hello, in the following reaction HBr is strong acid when reacts with Amphoteric Aluminium hydroxide gives water & AlBr3 as salt.
We know that in neutralization reaction
acid & bases reacts to give salt and water. Hence following reaction is neutralization reaction.
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Determine the empirical formula of a compound containing 63.50 % silver, 8.25 % nitrogen, and the remainder oxygen.
Answe AgNO₃
1:1:3 ratio
Who likes Science, Biology, Chemistry and physics ..? what is the similar to all of the following subjects..?
Answer:
Explanation:
They're all forms of science!
The compound that forms between nitrogen and chlorine is
a. ionic
b. molecular/covalent
Answer:
Covalent bonding is a type of chemical bonding which is characterized by atoms sharing electrons. For nitrogen and chlorine to covalently bond, nitrogen needs 3 electrons. Chlorine only has one electron therefore two more chlorine molecules are needed. Because one atom of nitrogen needs 3 atoms of chlorine to bond, the formula will be NCl3.
someone help ,, I'll give brainliest lolll .
Answer:
The last one
Explanation:
Can someone help me please?
Answer:
SUN
Explanation:
Hope this helps! Plz mark as brainliest!
Which of these describes the flow of energy as rock salt is dissolved in water?
Answer:
When salt dissolves in water, sodium and chloride ions are pulled apart to form new weak bonds with water molecules. Pulling them apart takes energy, while forming new bonds with the water molecules releases energy. Hope it helped (=^･ｪ･^=)
How many grams are in 2.0 x 10-5 moles of uranium?
Answer choices
5.3 x 10-3 grams
4.8 x 10-3 grams
1.4 x 10-3 grams
2.2 x 10-3 grams
Answer:
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Which of the following describes an exothermic reaction?
An exothermic reaction is described by ΔH(reactants) is greater than ΔH( products) and the correct option is option A.
What is Exothermic reaction?The word exothermic means “releasing heat.” Energy, often in the form of heat, is released as an exothermic reaction proceeds.
Enthalpy of a reaction is defined as the heat energy change (Δ H) that takes place when reactants go to products. If heat is absorbed during the reaction, Δ H is positive; if heat is released, then Δ H is negative.
ΔH value negative –> energy released –> exothermic reaction
ΔH value positive –> energy absorbed –> endothermic reaction
Therefore, an exothermic reaction is described by ΔH(reactants) is greater than ΔH( products) and the correct option is option A.
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How many moles of a gas are in a 2.2-liter balloon at 600 mmHg and 85 C. Also asks to identify the P, V, N, R, and T. If unknown then put "?"
We have that for the Question "How many moles of a gas are in a 2.2-liter balloon at 600 mmHg and 85 C." it can be said that Moles of gas is
n= 0.059 moles of gas
From the question we are told
How many moles of a gas are in a 2.2-liter balloon at 600 mmHg and 85 C. Also asks to identify the P, V, N, R, and T. If unknown then put "?"
Generally the equation for the is mathematically given as
[tex]P=\frac{600}{760}\\\\P=0.789atm[/tex]
Therefore
[tex]n=\frac{PV}{RT}\\\\Therefore\\\\n=\frac{PV}{RT}\\\\n=\frac{0.789*2.2}{0.08206*(85 + 273)}\\\\[/tex]
n= 0.059 moles of gas
Therefore
Moles of gas is
n= 0.059 moles of gas
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Why does shaking the drink crystals in a water bottle help the solute dissolve faster?
Answer:
Shaking exposes the salts to the solvent more quickly. Shaking helps more water evaporate. Shaking equalizes the water temperature. Shaking causes more ions to precipitate out of solution.
Explanation:
A teacher sprinkles some iron shavings on a clear tray . She places two magnets in the shavings with the north ends facing each other . Based on the cause-and-effect relationship between the magnets, which phenomenon is the teacher modeling for her students ?
Answer:
Field of repulsion.
Explanation:
An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).
This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.
Cause and effect can be defined as the relationship between two things or events in which an occurrence one (cause) leads to the occurrence of another (effect).
In this scenario, a teacher sprinkles some iron shavings on a clear tray. She places two magnets in the shavings with the north ends facing each other. Based on the cause-and-effect relationship between the magnets, the phenomenon the teacher is modeling for her students is field of repulsion.
Generally, the two north ends of a magnet have the same polarities and as such are considered to be like charges.
Hence, the field of repulsion is a phenomenon that is based on the fact that like charges repel while unlike charges attract. Thus, the north end of a magnet would repel the north end of another magnet placed beside it.
When a sound is louder what
measurement gets bigger?
Answer:
amplitude or pitch
Explanation:
5. What kind of model is represented in the image below?"
A. mathematical
B. physical
C. virtual
Answer:
virtual
Explanation:
because we cannot touch or sense it
What is the identity of the element that has 19 protons and 22 neutrons?
Answer:
A titanium ion
Which of the following is the main cause of acid rain?
water vapor
photosynthesis
ozone depletion
smog
Answer:
photosynthesis
Explanation:
Answer:
Photosynthesis
Explanation:
I had it on a quiz.