Harvey mixes two liquids. Which observation of the new mixture most likely indicates a precipitate is O A. a cloudy appearance OB. a bubble formation OC. a change in color O D. a change in odor​

Answers

Answer 1

Answer:

A cloudy appearance!!

Explanation:

Hope it helps, just took a quiz.

Answer 2

Answer:

a cloudy appearance

Explanation:

i have big brain


Related Questions

1.0250 - 0.00063 =
O 1.02
1.0243
1.02437
DONE

Answers

Answer:1.0243

Explanation: I think that is it

The answer is B aka 1.0250 :)

a 1 mL pipette delivers a measured volume of .98 mL (calculate the percentage error)

Answers

Answer:

2%

Explanation:

.98 is 98% of one and therefore they are missing 2%

Answer:

2%

Explanation:

The answer is 2%.

100-98 is 2.


2. If an eagle is flying at a constant speed, it is accelerating. True or
False

Answers

Answer:

False

Explanation:

Answer:

:0

Explanation:

1. Measuring instruments, such as rulers and graduated cylinders, are often used in experiments to increase the A clarity of the hypothesis B. testability of the hypothesis C. accuracy of the data sample size of the data 5​

Answers

Answer:

C. accuracy of the data sample size of the data

Explanation:

Measuring instruments, such as rulers and graduated cylinders, are often used in experiments to increase the accuracy of the data sample size which is usually gotten from the taken reading.

Measuring instruments such as rulers have accurate readings which makes measurements in any form very easy and more accuracy.

help me plz, ASAP . (25 points)

Answers

Answer:

what is the question

Explanation:

I really need help with this before 4:50

Your Uncle Danny just moved into a new apartment and wants to make his famous spaghetti sauce for his new
neighbors. Unfortunately, he hasn't unpacked all of his kitchen utensils. His recipe calls for ' a cup of
oregano, however he can only find a teaspoon to measure out his spices. How many teaspoons of oregano
would be the same as a cup?

Answers

Answer:

48 teaspoons

Explanation:

1 cup equals 48 teaspoons.

give an answer to questions 3 will give you 20 point ASSSAAPP​

Answers

Answer:

Explanation:

1. It is five valence electrons.

2. It is four valence electrons.

3. It is six valence electrons.

4. It is two valence electrons.

I do hope I helped you! :)

Answer:

1. c

2. b

3. a

4.d

Explanation:

A recycling center must find a way to separate all of the aluminum cans from those made of nickel or iron. What would be a reliable, efficient way to separate them?

Answers

Answer:

Use a giant magnet to pick up the iron and nickel ones, leaving the aluminum behind.

Explanation:

Stay safe!

A calorimeter made from a can is used to measure the calories in a peanut. During the experiment, the

measured calories were 35% of the true/accepted value given by references

Answers

Answer:

The heat generated per gram of sample in calories is 0.87 g

Explanation:

Given that,

A calorimeter made from a can is used to measure the calories in a peanut.

During the experiment, the  measured calories were 35% of the true/accepted value given by references

Suppose, the mass of peanut is 0.4 g and find the

We need to calculate the heat generated per gram of sample in calories

Using formula of heat generated

[tex]q=\dfrac{q_{penut\ calorimeter}}{m_{peanut}}[/tex]

Put the value into the formula

[tex]q=\dfrac{0.35}{0.4}[/tex]

[tex]q=0.87\ g[/tex]

Hence, The heat generated per gram of sample in calories is 0.87 g

what is hydraulic pressure?

Answers

hydraulic pressures caused by the migration of water molecules and alkali ions into the restricted spaces of the calcite/clay matrix around the dolomite rhombs.

If Mr. Murchison is testing out how the light in his classroom affects how sleepy his students get, what should his dependent variable be?

Answers

Answer:the dimmer the light is,the more sleepy the students become

Explanation:

story that explains an example of a scientific method

Answers

Answer:

I don't understand you question

HELP! WILL GIVE BRAINLY!!!

Density is an intensive physical property because the density of a given substance does not change with the size of the sample. (2 points)
True
False

Answers

Answer:

True

Density = mass/volume

Suppose that a block has a mass of 20 g and a volume of 20 cm^3.

Density = 20 g/20 cm^3 = 1 g/cm^3

Now, you cut the block in half. The half-block has a mass of 10 g and a volume of 10 cm^3.

The density of the half-block is

Density = 10 g/10 cm^3 = 1 g/cm^3

The density stays the same, even though the size of the sample has changed.

Explanation:

Answer:

✅True

Explanation:

Density is an intensive physical property because the density of a given substance does not change with the size of the sample.

IamSugarBee

how does kinetic energy at the bottom of a hill compared to its potential energy at the top​

Answers

Answer:

Kinetic energy would have to work ten times harder than potential energy.

Explanation:

Let’s say you have a boulder and your asked to push it up the hill it would be difficult right? But lets reverse the situation what if you are asked to roll the boulder down the hill it wouldn’t be much work because the hill is basically doing all the work For you. Hope this Helps:)

how to calculate molecular mass?

Answers

you use amount of molecules multiplied by atomic mass

Living sustainably means living on ____—the renewable resources such as plants, animals, soil, clean air, and clean water provided by Earth's natural capital. A. Exponential growth natural income ecosystem services factors of sustainability biodiversity

Answers

Answer:

natural income

Explanation:

Living sustainably in the 21st century means coexisting with the nature. In other words, to live sustainably means to meet the needs of the human without affecting or degrading the mother nature.

In the context, living sustainably means to live from the natural income from the nature's gift to us, using their natural resources and not hurting them or exploiting them. They may be resources from the soil, plants, clean air, animals, nature's clean water,etc.

Why does the copper(I) ion Cu+ have 10 3d electrons?

Answers

Copper, and chromium as well, are two exceptions. Copper has this configuration because a full d10 sub shells has lower energy, therefore it prefers filling up the 3d sub shells with 10 electrons and then leaving the 4s sub shell with only one electron.

How to calculate the amount of water needed to dilute a solution?

Answers

Answer:

Suppose you must prepare 400 ml of a disinfectant that requires 1:8 dilution from a concentrated stock solution with water. Divide the volume needed by the dilution factor (400 ml / 8 = 50 ml) to determine the unit volume. The dilution is then done as 50 ml concentrated disinfectant + 350 ml


1. The density of a substance is 4.8 g/mL. What is the volume of a
sample that is 19.2 g?

Answers

Answer:

d= 4.8g/mL

m= 19.2 g

V=m/d

V= 4 mL

PLS I NEED HELP give me examples of an atom

Answers

Answer:

Neon (Ne)

Hydrogen (H)

Argon (Ar)

Iron (Fe)

Calcium (Ca)

Deuterium, an isotope of hydrogen that has one proton and one neutron.

Plutonium (Pu)

F-, a fluorine anion.

Explanation:

I got u

When an iron nail is ground into powder, its mass ____.
a. stays the same
b. decreases
c. increases
d. cannot be determined

When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?

a. a physical change
b. a chemical change
c. neither a physical change nor a chemical change
d. both a physical change and a chemical change

Answers

Explanation:

(a) The mass of an object remains the same always. It is independent of its location. In this case, an iron nail is ground into powder. It means that its mass will remain unchanged. Hence, (a) is the correct option.

(b) Whenever there is a change of color of an object, a chemical reaction occurs. It shows that a reaction happens there. In this problem, a paper turns yellow-brown upon exposure to sunlight. A chemical reaction takes place there. Hence, (b) is the correct option.

1) The mass of any substance remains the same irrespective of the state.

Thus, an iron nail ground into powder should have the same mass unless parts of it got lost during grinding.

2) A paper that turns yellow-brown upon exposure to sunlight is likely undergoing a chemical change. It could be that the light oxidizes the atoms of the paper.

Chemical changes occur when the atoms of a substance combine with another substance to form new products. New products are not formed in physical changes and the original product can be retrieved by physical means.

More on physical and chemical changes can be found here: https://brainly.com/question/1161517?referrer=searchResults

What lead to the discontinued use of DDT? What were its effects on people? Nature? People- Nature-

Answers

My big dixk jkjejdjjdjjdjdjdjdjdjdjf

rabbit is one of the sweetest animal on world ....change it into positive degree​

Answers

Answer:

rabbit is one of the sweet animal

in the world

Which of the following has a negative charge? A.neutrino B.electron C.alpha particles D.gamma rays

Answers

Answer:

B. Electrons

Explanation:

Protons have a positive (+) charge.

Neutrons have a neutral (0) charge.

Electrons have a negative (-) charge.

Alpha Particles is a helium atom.

Gamma Rays are radiation.

Neutrino is Quantum Physics.

Zinc reacts with hydrochloric acid according to the reaction equation Zn(s)+2HCl(aq)⟶ZnCl2(aq)+H2(g) How many milliliters of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s)?

Answers

Answer:

41.17

Explanation:

n Zn =  mass / m.wt

      = 8.75 /(65.4) = 0.1338 mole

n HCL = ( from the balanced equation )

     2HCL                  Zn

          2mole   → 1  mole

          x  mole     →             0.1338mole

     n HCL = .268 mole

M= mole/liter

6.50= 0.268/x

so u have0.04117  liter = 41.17 ml

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 41.17 ml of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s).

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of moles of zinc=  mass / molecular mass

                                       = 8.75 /(65.4) = 0.1338 mole

number of moles of HCl ( from the balanced equation )

2 moles of HCl reacts with one mole of Zn

number of moles of HCl = 2×0.1338 =0.268 mole

Molarity = number of mole of HCl/volume occupied by solution

6.50= 0.268/volume

Volume of HCl = 41.17 ml

Therefore, 41.17 ml of 6.50 M HCl(aq) are required to react with 8.75 g Zn(s).

To know more about mole, here:

https://brainly.com/question/15209553

#SPJ5

Matter and energy are
OA) similar to work and distance.
OB) interconvertible.
O C) not related to each other.
O D) similar to mass and weight.

Answers

When energy transforms into mass, the amount of energy does not remain the same. When mass transforms into energy, the amount of energy also does not remain the same. However, the amount of matter and energy remains the same. ... You would weigh much less on the Moon because it is only about one-sixth the mass of Earth. So the answer is D

An unknown solid has a mass of 837.21 g. The volume of the solid, determined by water displacement is 37.00 mL. Calculate the density of the solid.

Answers

Answer:

The answer is

22.63 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]Density = \frac{mass}{volume} [/tex]

From the question

mass = 837.21 g

volume = 37.00 mL

The density of the substance is

[tex]Density = \frac{837.21}{37} \\ = 22.62729[/tex]

We have the final answer as

22.63 g/mL

Hope this helps you

what is a compound x in chemistry?​

Answers

it is unknown...................

Answer:

no there is not compound x in chemistry

Is copper penny react
reaction with Nitric
acid a
Chemical or physical
Change?

Answers

Answer:

The reaction that occurs is a redox reaction. The Copper metal (Cu 0)on the copper pennies is oxidized in concentrated nitric acid to produce Cu2+ ions. Copper is easily oxidized to Cu2+, which is blue in aqueous solutions (water) so you should see the solution turn blue as the copper penny reacts.

Have a nice day ;)(^-^)

Taking into account the definition of chemical and physical change, the reaction of the copper penny with nitric acid is a chemical change.

Physical change

Physical changes are those in which the substances involved are the same before and after the change. That is, a physical change is a transformation in which the nature of matter does not change.

Chemical change

Chemical changes are considered to be those in which the substances involved are transformed into totally different ones.

In this way, the initial substances do not exist after the phenomenon has occurred and instead, new substances are formed, different from the initial ones.

That is, a chemical change is a transformation in which the nature of matter varies.

This case

When a penny of copper reacts with nitric acid, a redox reaction occurs where the copper metal in the copper pennies is oxidized to produce Cu²⁺ ions, whereas because the nitric acid oxidizes the copper, the nitric acid itself is reduced to nitric oxide (NO). Nitric oxide then reacts with oxygen in the air to produce nitrogen dioxide (NO₂). This can be represented by:

Cu + 4 HNO₃ → Cu²⁺(ac) + 2 NO₃⁻  + 2 NO₂ + 2 H₂O

Finally,  the reaction of the copper penny with nitric acid is a chemical change because a redox reaction occurs.

Learn more:

https://brainly.com/question/2684420?referrer=searchResultshttps://brainly.com/question/13339068?referrer=searchResults

ANSWER QUICKLY PLEASE!!!
Explain how electron microscopes work and why some scientists might prefer to use electron microscopes instead of light microscopes.

Answers

Answer:

Electron microscopes differ from light microscopes in that they produce an image of a specimen by using a beam of electrons rather than a beam of light. Electrons have much a shorter wavelength than visible light, and this allows electron microscopes to produce higher-resolution images than standard light microscopes.

Explanation:

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