the two middle ones is the answer
how long does it take for stirring and heat to dissolve in water?
Answer:
5-20 mins
Explanation:
What is the quickest way to dissolve milk in water? Can milk dissolve in all
solvents? Explain your answer.
It dissolves in hot water because of the water temperature, the milk could not take it to mix in the hot water
A rock is an (blank) of minerals.
I don't get this at all.
Please mark as Brainiest. I would be so happy!!!
Answer:
Minerals - composed of orderly arrangements of atoms. Rocks - are composed of minerals. Crystals - solid materials that have an orderly arrangement of atoms. Gems - are rare and beautiful minerals that often are cut from crystals.
Which of the following is a characteristic of both scientific laws and
scientific theories?
A supported by much scientific evidence
B explain why something happens
C based on opinions of scientists
D describes what happens
revious
Answer:
A supported by scientific evidence
How many joules are needed to melt 50 g of ice at 0°C?
Answer:
You need the Delta H fusion for water. Multiply that by 50 grams. Then multiply 50 g x 4.184 x 65 to get joules to raise water to 65 degrees. Add these values together to get total joules.
Explanation:
If you change number of neutrons in an atom, you will also change its-
Answer:
atomic mass. You will have created an isotope.
Explanation:
State two function of blood in our
body?
Answer:
transporting oxygen and nutrients to the lungs and tissues
forming blood clots to prevent excess blood loss
carrying cells and antibodies that fight infection
Explanation:
.......(◍•ᴗ•◍).......
#10- ill mark brainliest and give 5 stars if its correct
Answer:
#10 for?
Explanation:
What should you wear during lab investigations to protect your eyes?
Answer:
goggles
Explanation:
If car has traveled 24 km in 2 hours,what is the average speed
Answer:
The answer is 12 km/hrExplanation:
The average speed can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
where
d is the distance
t is the time taken
So we have
[tex]a = \frac{24}{2} \\ [/tex]
We have the final answer as
12 km/hrHope this helps you
1. Any atom that is electrically neutral must contain -
Answer:
The same number of electrons and protons.
Explanation:
Because a proton has a charge of +1 and an electron has a charge of -1, the ratio of protons to electrons must be 1:1 for the atom to be neutral.
Which of these statements is true about a neutral atom of chromium (Cr)? help
A.has more protons than electrons
B. has fewer subatomic particles than an atom of iron (Fe)
C.has 52 protons and 52 electrons
D.has more electrons than neutrons
Answer : The correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .
Explanation :
The given element is chromium (Cr). The atomic number of chromium is 24.
As we know that the atomic number is either equal to the number of protons or number of electrons.
So, Atomic number = Number of protons = Number of electrons = 24
And we know that mass number is the sum of number of protons and number of neutrons.
Mass number of chromium = 52
Mass number = Number of protons + Number of neutrons
52 = 28 + Number of neutrons
Number of neutrons = 28
And we know that the atomic number of iron (Fe) is 26.
Number of protons = Number of electrons = 26
Mass number of Fe = 56
Number of neutrons = 30
From the given options we conclude that the a neutral atom of chromium has fewer subatomic particles than an atom of iron (Fe).
Hence, the correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .
What are the purposes of theories in science?
b. What makes a theory a “good theory”?
please help
Answer:
Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy).
A good theory in the theoretical sense is (1) consistent with empirical observations; is (2) precise, (3) parsimonious, (4) explanatorily broad, and (5) falsifiable; and (6) promotes scientific progress (among others; Table 1.1).
Read the following excerpt and answer the question:
Scientists often refer to mushrooms as the "dark matter of biology" because we don't know much about them. Mushrooms are not plants
because they have no chlorophyll and cannot make their own food. They are actually fungi and absorb nutrients from their surrounding
environments, and they can even thrive at the bottom of the ocean or in the middle of a desert!
Use your own words to summarize why mushrooms and plants differ in their needs to use radiant energy from the sun.
Answer:
\/
Explanation:
Plants rely directly on the energy from the sun. The chloroplast create glucose from the sun rays through a process known as photosynthesis. Mushrooms, on the other hand, do not have the ability to use the sun's rays to create food, so they instead gather their energy from the nutrients from the soil or decaying things, such as plants, that once used the sun's radiation as sustenance. So basically mushrooms use the radiant energy from the sun indirectly and plants use it directly
Do you know when the transfer of heat/thermal energy has ended
PLEASE PLEASE HEELPPPP
Landslides happen when it rains making the ground heaver and more likeable to a landslide.
Plz help! The best answer will be marked as brainliest!
Make a funny sentence of alloys for Magnesium
Here is an example for Mercury, it HAS to for Magnesium
“I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”
Answer:
Megan trailer said pass the maga mic so I can sing, I'll call the mic magnesium
Explanation:
Get it cuz a mic is made out of magnesium
Write in the name of the molecular geometry for each molecule described below.
A molecule with two atoms and no lone pairs around the central atom has a shape.
A molecule with four atoms and no lone pairs around the central atom has a shape.
A molecule that has two atoms and two lone pairs around the central atom has a shape.
A molecule that has five atoms and no lone pairs around the central atom has a shape.
Answer:
linear
tetrahedral
bent
trigonal-bipyramidal
Explanation:
i just did it one edg
Which of the following is a unit of density? = Mass / volume
A: liters per cubic gram
B:cubic meters
C:grams per cubic centimeter
D:square meters
Answer:
The correct answer is C.
Explanation:
To solve this problem, we should first recall possible units for mass and volume. Mass can be represented with units of grams, kilograms, etc. Volume has units of cubic meters, cubic centimeters, etc.
Therefore, since we know that density is mass divided by volume, the only answer that makes sense here is C. grams per cubic centimeter (where per signifies that grams are being divided by cubic centimeters).
Hope this helps!
with ozone. The following is a chemical reaction for CIO+ Bro - Cl + Br + O2 CI + O3 - CIO + O2 Br + O3 → BrO + O2 a. chlorofluorocarbons b. halons C, UV radiation d. none of the above
Answer:
B. Halons
Explanation:
PLEASE HELP I NEED HELP ASAP I WILL GIVE BRAINLIEST AS SOON AS POSSIBLE
Answer:
1 . 2.393e+ 9
2. ???
3. 3.25e-6
Explanation:
2393 kg = 2.393e+9 mg
43.23 g = 4.323 dam
0.325 cm = 3.25e-6 km
(Note: I'm not 100% that these are correct, but I hope this helps you tho. ^^)
+
The density of a liquid substance is 0.95 g/mL. Three students calculated the density as 0.56 g/mL. Calculate the percent error.
0 41.05 %
41.0 %
O 41.053%
O 41%
Answer:
The answer is 41.05 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual density = 0.95 g/mL
error = 0.95 - 0.56 = 0.39
So we have
[tex]p(\%) = \frac{0.39}{0.95} \times 100 \\ = 41.0526315...[/tex]
We have the final answer as
41.05 %Hope this helps you
Alveolar air (a mixture of nitrogen, oxygen, and carbon dioxide) has a total pressure of 0.998 atm. If the partial pressure of oxygen gas is 0.198 atm and the partial pressure of nitrogen gas is 0.770 atm, what is the partial pressure of carbon dioxide in millimeters of mercury?
Answer:
The partial pressure of carbon dioxide is 22.8 mmHg
Explanation:
Dalton's Law is a gas law that relates the partial pressures of the gases in a mixture. This law says that the pressure of a gas mixture is equal to the sum of the partial pressures of all the gases present.
In this case:
Ptotal=Pnitrogen + Poxygen + Pcarbondioxide
You know that:
Ptotal= 0.998 atmPnitrogen= 0.770 atmPoxygen= 0.198 atmPcarbondioxide= ?Replacing:
0.998 atm=0.770 atm + 0.198 atm + Pcarbondioxide
Solving:
Pcarbondioxide= 0.998 atm - 0.770 atm - 0.198 atm
Pcarbondioxide= 0.03 atm
Now you apply the following rule of three: if 1 atm equals 760 mmHg, 0.03 atm how many mmHg equals?
[tex]Pcarbondioxide=\frac{0.03 atm*760 mmHg}{1 atm}[/tex]
Pcarbondioxide= 22.8 mmHg
The partial pressure of carbon dioxide is 22.8 mmHg
describe 2 physical and 2 chemical changes involved in cooking
Please answer quick!!!
Answer: theres alot let me explain...
Explanation:
Protein denaturation is what makes eggs solidify, collagen break down and convert to gelatin in slow-cooked meat, fish and chicken become more opaque, and all meats firm up and change color. This is primarily achieved by applying heat, but can also occur in the presence of acidic and basic ingredients.
The Maillard reaction is the primary effect taking place in “browning”, and produces more flavor compounds, resulting in more complex flavors in food that we generally find enjoyable. It involves reaction between amino acids (proteins) and a certain class of sugars called reducing sugars — mostly the monosaccharides, such as glucose and fructose.
Caramelization is a secondary browning effect that occurs in foods with sugar content, even though all browning is often referred to as “caramelizing”. It mostly takes place at higher temperatures than Maillard reaction (with the notable exception of fructose).
Pyrolysis, or thermal decomposition (chemical breakdown) begins at higher temperatures. While caramelization is technically in this category, the main effect of this reaction is carbonization. This is what we generally mean when we talk about “burning” food, even though no combustion has taken place. It’s also what happens when we cause oil to smoke and darken. In small, controlled amounts, this can still provide desirable flavors, such as char on the outside of meat and contributing to “wok hei” in stir frying — the latter of which does involve some combustion.
Acid-base reactions produce carbon dioxide, which creates the rise in quick breads such as biscuits. These often occur at room temperature, but some also don’t occur until higher temperatures — which is how “double-acting” baking powder works.
Gluten formation occurs when you mix flour and water, resulting in stretchy doughs and fluffy baked goods. This occurs easily at room temperature.
Why is change good for an
ecosystem?
Answer:
it helps the area develop and help the animals adapt
Explanation:
im new so i hope this helps
The man who was first to see living microorganisms in his pond water was who?
How many grams of calcium nitrate, Ca(NO3)2 (molecular weight 164), contains 24 grams of oxygen atoms?
a
41 g
b
96 g
c
62 g
d
164 g
In which way are sugars usually transported throughout a pine tree?
Answer:
through the tree's fibers
Explanation:
the tree's leaves produce sugar that is transported through the tree's fibers. Sap also contributes means of transportation for these sugars.
do you think pokemon is bad
Take away my first letter and I remain the same. Take away my last letter and I remain unchanged. Remove all my letters and I'm still me. What am I?
Answer:
mail carrier
Explanation: