Answer:
They are branch of science.
Explanation:
hope this helps
Answer:
Branch's of science yk
Explanation:
I'm smart lol
Susan said, "if I fertilize my geranium plants, they will blossom"
Choose the correct step in the scientific method
A. recognize a problem
B. from hypothesis
C. test the hypothesis with an experiment
D. draw conclusions
Answer:
This is called a hypothesis, which can be identified by the if... then... format.
So, the correct option is B. Form a hypothesis.
Let me know if this helps!
Answer:
C
Explanation:
what is local unit?
.
Answer:
Explanation:
Local unit means a county, city, village, or township.
best way to separate a solid from a liquid what separation technique is needed
Answer:
Filtiration technique
Explanation:
6. What type of bond is called covalent bond?
Answer:
ECovalent bond, in chemistry, the interatomic linkage that results from the sharing of an electron pair between two atoms. The binding arises from the electrostatic attraction of their nuclei for the same electrons. ... Silicon, carbon, germanium, and a few other elements form covalently bonded solids.
Please make me Brain liest );
PLS HELP WILL GIVE BRAINLIEST
it is a simple chemistry question
i thought F has 9 electrons, so why does this structure show 8 electrons.
Answer:
The IUPAC structure only shows bond pairs and lone pairs. In the flouromethane structure above, there is only one bond pair and three lone pairs of electrons. Therefore there is one electron remaining, but since it doesn't not make up a pair, it is ignored in the structure but theoretically it is present.
[tex].[/tex]
Answer:
therefore there is one electron remaining , but since it doesn't make up a pair . It is ignored in the structure but theoretically it is present .
What are the standard temperature and pressure conditions enthalpy is usually measured under
Answer:
temperature must be 273 Kelvin (0°C)
pressure must be 1 atm
50 POINTS!!! PLEASE HELP!!
How did elements with more than 2 protons, such as
the carbon in our cells, form?
A. They formed from hydrogen and helium slamming into each
other in the first few minutes after the big bang.
B. They were formed at the same time as hydrogen and helium right after the big bang.
C. They formed 400 million years after the universe formed in giant fusion reactors known as stars.
D. They are formed when lighter elements are pulled together by gravity to form a planet.
Answer:
D. They are formed when lighter elements are pulled together by gravity to form a planet.
Hope it helps you.The elements with more than 2 protons, such as the carbon in our cells, form when lighter elements are pulled together by gravity to form a planet. The correct option D.
What are elements?
Elements are a substance that has a given number of proton in the nuclei, and they can not be divided into any simpler form in a chemical reaction. Elements are present in the periodic table.
The elements that have 2 protons are formed when the lighter elements collide together in the earth from gravity and constitute a new element.
Thus, the correct option D. They are created when lighter elements are pulled together by gravity to constitute a planet.
Learn more about elements, here:
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A student conducts an experiment to determine how the temperature of water affects the time for sugar to dissolve. In each trial, the
student uses a different amount of water and a different temperature of water.
What is wrong with this experimental design?
The fact that the student used different amount of water (another independent variable) is wrong with the experimental design
WHAT ARE THE COMPONENTS OF AN EXPERIMENT?
An experiment aims at solving a scientific problem or answering a scientific question. An experiment should contain a variable being changed called INDEPENDENT VARIABLE and a variable being measured called DEPENDENT VARIABLE. In an ideal experiment, only one independent variable should be used while every other variable should be kept constant. This is done so as not to affect the result of the experiment.In the experiment conducted by the student in this question, two independent variables were used i.e. the different amount of water and the different temperatures. This is what is wrong about the experimental design.
In a nutshell, the fact that two independent variables were used by the student is what is wrong about the experimental design.Learn more at: https://brainly.com/question/967776
Answer: In an ideal experiment, only one independent variable should be used while every other variable should be kept constant.
why hydrogen and oxygen all around us dows not form water
Answer:together doesn't make water
Explanation:
together doesn't make water
Question 3 of 10
How are prefixes used to name compounds?
O A. Prefixes are used to indicate the number of atoms in both
covalent and ionic compounds.
O B. Prefixes are used to tell how many of each kind of atom are in
covalent compounds.
O C. Prefixes are used to tell how many of each kind of atom are in
ionic compounds.
O D. A prefix is used only for the name of the second element in
covalent compounds.
the answer is highly possible to be C
Prefixes are used to indicate the number of atoms in both
covalent and ionic compounds.
Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral.
Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other. Since hydrogen is a nonmetal, binary compounds containing hydrogen are also usually covalent compounds.
Metal + Nonmetal —> ionic compound (usually)Metal + Polyatomic ion —> ionic compound (usually)Nonmetal + Nonmetal —> covalent compound (usually)Hydrogen + Nonmetal —> covalent compound (usually)Learn more about covalent and ionic compounds.
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what is used in conjunction with a scale balance to weigh dry chemicals
A graduated cylinder is filled 32.6 ml with water and a piece of granite is placed in the cylinder displacing the level to 40.7 ml what is the volume of the granite piece in cubic centimeters
Answer: 8.1
Explanation:
good luck
which property is a physical property
Answer:
a
Explanation:
because it is matter . It has change in molèculaŕ level
A Brønsted-Lowry acid Question 9 options: A) has a lower pH than vinegar. B) is any species that donates a proton. C) is any species that accepts a proton. D) is limited to aqueous solutions.
Answer:
B) is any species that donates a proton.
Answer:
A Brønsted-Lowry acid is any substance (molecule or ion) that can donate a hydrogen ion (H+).
A Brønsted-Lowry base is any species that can accept a hydrogen ion (H+).
Explanation:
In short, acids have the ability to donate protons and bases have the ability to accept protons.
Take the following reaction for example:
H2SO4+NH3⇌NH+4+HSO−4
Sulfuric acid (H2SO4) is the Brønsted-Lowry acid because it donates a hydrogen ion. Ammonia (NH3) is the Brønsted-Lowry base because it accepts the hydrogen ion.
The Brønsted-Lowry theory also introduces the concept of conjugate acid-base pairs. A conjugate acid-base pair are two species that differ by a (H+) ion.
Based on the reaction above, the ammonium ion
(NH+4) is the conjugate acid of the base ammonia and the hydrogen sulfate ion (HSO−4) is the conjugate base of sulfuric acid.
Here's a tip to let you know which substance is the conjugate acid and which substance is the conjugate base:
A conjugate base has one less (H+) proton than the acid you started with.
A conjugate acid has one more (H+) proton than the base you started with.
So option c is correct
Is any spcies that denotes a proton
Explanation:
plz search rhe chemistry project on any topic..
IF NOT THEN SORRY :)
Two graduated cylinders, one filled with water to 20 millimeters and one containing a rock and water filled to 32 millimeters.
Use the image to determine the volume of the rock.
Initial volume:
mL
Final volume:
mL
Volume of rock:
cm3
Answer:
1. 20
2. 32
3. 12
Explanation:
How is polyethene formed?
A. None of these
B. The double bond on reactive ethene molecules breaks allowing them to bond with each other and form a chain.
C. Double bonds are very strong. This means when ethene is heated, hydrogens will be removed before the double bonds break. When ethene molecules lose hydrogens, their carbons bond with each other forming branching chains.
D. Polyethene is formed by the formation of double bonds between carbons in ethane molecules.
Answer:
c
Explanation:
because 2× is strong. hydrogen will be remove
Help!!!!!!!!!!!!!!!!!!
[tex]\\ \rm\longmapsto 9.7300\times 10^2+9.8700\times 10^3[/tex]
[tex]\\ \rm\longmapsto 9.73\times 10^4+9.87\times 10^3[/tex]
[tex]\\ \rm\longmapsto 19.6\times 10^{4+3}[/tex]
[tex]\\ \rm\longmapsto 19.6\times 10^7[/tex]
Answer:
1.0843 × 10^4
Explanation:
9.7300 × 10^2 + 9.8700 × 10^3
= 10843
1.0843 × 10^4
= 10843
which of the following two conditions will favor a spontaneous reaction?
a) an increase in entropy and a decrease in enthalpy
b) an increase in both entropy and in enthalpy
c) a decrease in entropy and a decrease in enthalpy
d) a decrease in entropy and an increase in enthalpy
Two metals with equal mass will absorb heat according to their heat absorbing capacity.
The increase in entropy will cause the solid substance to break into multiple pieces.
When these solute particles detach from each other they will form a solution. Entropy increase will cause the temperature to increase.
Decrease in enthalpy is an exothermic reaction which releases heat from the reaction and then desired products will be formed.
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50. Carbon mono-oxide can be prepared by heating following substance with Conc. H2SO4. a. Oxalic acid b. Acetic acid c. Ethanoic acid d. All ic 252
A
Carbon monoxide gas can be prepared in lab by heating formic acid or oxalic acid with conc. H2SO4.
Procedure: Small amount of oxalic acid crystal is taken in a round- bottomed flask and all the apparatus are fitted as shown in figure. When conc. H2SO4 is poured in the flask through thistle funnel and heated then a mixture of CO and CO2 gas is formed. The mixture of gas is passed through a bottle containing NaOH solution where the CO2 gas is absorbed by NaOH.
2NaOH + CO2 → Na2CO3 + H2O
The pure CO gas is then collected in a gas jar by downward displacement of water.
why metals are not often used to
make clothes
Answer:
They would be to heavy and you would be really stiff
Explanation:
Imagine walking in a suit made of iron or tin
You would feel like the Tin Man
You would be stiff
Metals are hard and heavy
How many grams of liquid water are produced when 60 grams of ice melt?
Answer: 60 Grams of water are produced, because you can't get more than the amount that was in the original ice cube
Explanation:
How many moles of Ba(OH)2 are present in 205 mL of 0.600 M Ba(OH)2?
Answer:
Explanation:
0.180 moles of Ba(OH)2 are present.
Answer:
[tex]\boxed {\boxed {\sf 0.123 \ mol \ Ba(OH)_2}}[/tex]
Explanation:
Molarity is a measure of concentration in moles per liter. It is calculated using the following formula:
[tex]molarity= \frac{moles \ of \ solute}{liters \ of \ solution}[/tex]
The molarity of the solution is 0.600 M Ba(OH)₂. 1 molar (M) is also equal to 1 mole per liter, so the molarity is 0.600 moles of Ba(OH)₂ per liter.
The volume of the solution is 205 milliliters, however, we need to convert the volume to liters. Remember that 1 liter contains 1000 milliliters.
[tex]\frac { 1 \ L}{1000 \ mL}[/tex][tex]205 \ mL * \frac { 1 \ L}{1000 \ mL} = \frac {205}{1000} \ L = 0.205 \ L[/tex]Now we know the molarity and volume, but the moles are still unknown.
molarity = 0.600 mol Ba(OH)₂/ L moles of solute = x liters of solution = 0.205 LSubstitute these values into the formula.
[tex]0.600 \ mol \ Ba(OH)_2 /L = \frac{x}{0.205 \ L}[/tex]
We are solving for x or the moles of solute, so we must isolate the variable. It is being divided by 0.205 liters. The inverse of division is multiplication. Multiply both sides by 0.205 L.
[tex]0.205 \ L *0.600 \ mol \ Ba(OH)_2 /L = \frac{x}{0.205 \ L} * 0.205 \ L[/tex]
[tex]0.205 \ L *0.600 \ mol \ Ba(OH)_2 /L =x[/tex]
The units of liters cancel.
[tex]0.205 *0.600 \ mol \ Ba(OH)_2 =x[/tex]
[tex]0.123 \ mol \ Ba (OH)_2 = x[/tex]
The original measurements had at least 3 significant figures. Our answer currently has 3 sig figs, so we don't need to round.
There are 0.123 moles of barium hydroxide.
A scientist wants to know: "If salt is added to water, would the
solution still boil at the same temperature?"
torcses
Answer:
no, the sollution will boil at a higher temperature because the density of the sollution will increase when salt is added to it
Convert 15,000 seconds into minutes
Answer:
250 minutes
Explanation:
60 seconds = 1 minute
15000 secods = 15000 / 60
1500 secons = 250 minutes
to Separate camphor from sand we use_______process.
Answer:
to Separate camphor from sand we use sublimation process.Hope it is helpful to youQuestion 2 of 10
How might the government make sure scientific research is done in an ethical
way?
A. By encouraging scientists to perform within their own ideas of
right and wrong
B. By letting public opinion determine what is ethical in scientific
research
C. By allowing scientists to do what they think is best
D. By taking away research funds if certain ethical standards are not
met
Answer:
C I think. If I am wrong please correct me.
Explanation:
The word "atom" comes from the Greek word
Answer:
1) atomos. 2) uncuttable.
Explanation:
none
Experts believe that a good night sleep is vital to a success in school. Would kids that sleep 8 or
more hours a night get better grades than kids who sleep less than 7 hours a night?
Make a hyphotesis
Answer:
kids who sleep 8 or more hours a night
Explanation:
I hypothesize that kids who sleep 8 plus hours a night because your brain needs a good night's sleep to regenerate .
A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes?
- Molecules in both the metal and the surrounding air will start moving at lower speeds.
-Molecules in both the metal and the surrounding air will start moving at higher speeds.
-The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
-The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
Answer:
it will dilute to its natrual state. so c
Explanation:
