Someone plz help me :(

Someone Plz Help Me :(

Answers

Answer 1

Answer:

Descriptive investigations use careful observations and measurements to develop findings. Science journals, science logs, and field notebooks are some of the tools scientists use to gather information for descriptive investigations.

Explanation:


Related Questions

what dose gravity measure ?

Answers

Hope this helps


Answer = Gravity is measured by the acceleration that gives to freely falling objects.

Answer:

the acceleration that it gives to freely falling objects.

Explanation:

i took quiz

Write the molecular formula of sodium chloride and water​

Answers

sodium chloride = NaCl
water = H20

True or false: animals use photosynthesis to make food

Answers

False, plants use photosynthesis. Animals use cellular respiration
FALSEEEEEEEEEEEEEEEEEEEEEE

Soot is formed as a candle burns

a
Chemical Change
b
Physical Change

Answers

Answer:

Chemical change

Explanation:

Because a new substance is formed.

please help me it's urgent​

Answers

Answer:

save my photo

who knows you might like it :>

Please help me. I will mark you as a brainleist.​

Answers

Answer:

Your answer is in the attachment. Hope this helps you. Stay blessed.

Match each measurement to the correct number of significant figures it contains.



26.000 cm


0.800 km


0.00050 g


7300 m


3 x 10^5 mL

1

2

3

4

5

6

Answers

Answer:

Answer: a, b, c, d, e, f. a) 1 significant figure b) 3 significant figures c) 2 significant figures d) 4 significant figures e) 5 significant figures f) 6 significant figures Note that non-integers are rounded to the nearest integer and then count as the number of significant figures. For example, rounding 1.5 to two significant figures would mean one significant figure because it is an integer, not because it is a decimal.

Answer explanation: 26.000 cm = 2.6 x 10^2 cm. 0.800 km = 8 x 10^-3 km. 0.00050 g = 5 x 10^-4 g. 7300 m = 7.3 x 10^2 m. 3 x 10^5 mL = 3000000 ml or 300 L

Explanation:

How many significant figures are in each of these measurements?

32.14 cm

4.34 x 10^3 cm

2 g

13000 L

1.007 g/mL

6 mL

0.000005 L

2.7 mL

Answer: a, b and c contain 7 significant figures and the others each have 4 significant figures.

Incorrect answers indicate incorrect choices made for this problem or other problems on the worksheet . Answer explanation: 32.14 cm = 3.214 x 10^2cm 4.34 x 10^3cm = 4.34x10^5 cm 2 g = 2 grams 13000 L = 13 kiloliters 1.

A sunscreen preparation contains 2.70 % by mass benzyl salicylate. If a tube contains 6.0 oz of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture 340 tubes of sunscreen?

Answers

We know that the sunscreen preparation contains a 2.7% by mass of Benzyl Salicylate. From this, we will find that they need 1.559 kg of Benzyl Salicylate to make 340 tubes of sunscreen.

The initial data means that if the total mass of sunscreen is M, then the mass of Benzyl Salicylate will be 2.7% of M, or:

(2.7%/100%)*M = 0.027*M

Now, we know that a tube contains 6.0 oz of sunscreen.

Then M = 6.0oz

A tube contains:

0.027*6.0oz = 0.162 oz.

Then in 340 tubes, we will need 340 times 0.162 oz of Benzyl Salicylate, this is:

340* 0.162 oz = 55.08oz

And we want this quantity in kg.

Knowing that:

1oz = 0.028kg

Then 55.08oz is 55.08 times 0.028kg:

55.08*0.028kg = 1.559 kg

So they will need  1.559 kg of Benzyl Salicylate to make 340 tubes of sunscreen.

If you want to learn more, you can read:

https://brainly.com/question/24398363

Give an example of a non-biological chemical reaction that involves carbon. Name the process that converts a solid compound into a gas.

Answers

Answer:

The process that converts a solid mcompound into a gas is sublimation.

E.g- dry ice, solid iodine and ammonium salts

when the above solid are heated, only particles which are found on the surface of the solid gain enough energy and break all forces of attraction and form a gas.

Explanation:

what is true about chemicals?
A. Chemicals are rarely found on earth
B. Chemicals are never dangerous
C. Chemicals are in many substances in a home
D. Things containing chemicals always cost a lot of money

Answers

hi <3

i believe the correct option would be C

hope this helps :)

What is astronomy? Why is the study of astronomy important to humans?

Answers

Answer and Explanation:: Astronomy is the study space and what it contains. Astronomy should be studied by mankind because our survival is directly linked to the cosmos.  The Earth is heated by its nearest star, the Sun, and its ocean tides are directly connected to its only satellite, the Moon.  

Answer:

Astronomy is the study of stars and planets. It is important to humans because it helps us know if there is a supernova close to earth and more imformation about stars and planets that we need to know.

An explanation for a broad of observation, facts, and tested hypothses is called a

Answers

Answer:

that's is a theory

Explanation:

hope it may help you

who started water conservation in himachal pradesh

Answers

Explanation:

There are government khatris as well, which are maintained by the panchayat. Kuhls are a traditional irrigation system in Himachal Pradesh- surface channels diverting water from natural flowing streams (khuds). A typical community kuhl services six to 30 farmers, irrigating an area of about 20 ha.

Helppppp….. is this right?

Answers

Answer:

there's no attachment

Explanation:

.

Answer:

6 mL = Smallest

600 cL = Middlest

60L = Greater

Describe the color change that would be observed in water in left hand beaker

Answers

Answer:

is there supposed to be a photo with this?

Explanation:

9 The relative abundances of the two isotopes of chlorine are shown in this table:
Relative abundance
Isotope
35C1
75%
3701
25%
Use this information to deduce the mass spectrum of chlorine gas

Answers

Answer:

35.50 atomic mass

Explanation:

1. Multiplicate each isotope mass by its abundance

35 uma x 75% = 26.25 amu

37.01 uma x 25% = 9.2525 amu

2.  Add the values

26.25 +  9.2525  = 35.50 atomic mass

Convert 6.5 cm3 to m3

Answers

the Answer is

6.5e-6 m^3

[6.5e-6 = 6.5 x 10-6 = 0.0000065]

Answer:

0.0000065

Explanation:

To convert a cubic centimeter measurement to a cubic meter measurement, divide the volume by the conversion ratio.

Since one cubic meter is equal to 1,000,000 cubic centimeters, you can use this simple formula to convert:

cubic meters = cubic centimeters ÷ 1,000,000

m³ = 6.5 ÷ 1,000,000

m³ = 0.0000065

Arrange the gases in increasing order of the number of atoms that make up its molecule, from left to right.

Cl₂-CH₄-SO₂-CH₂O-C₂H₄.

thank you!

Answers

Answer:

C₂H₄-CH₄-CH₂O-SO₂-Cl₂

Explanation:

The arrangement of gases in increasing order of the number of atoms that make up its molecule, from left to right, is C₂H₄-CH₄-CH₂O-SO₂-Cl₂.

What are gases?

Gas is one of the matters. It's invisible, and its particles are present very far away from each other. The atoms of the gas move randomly, and they are always in motion.

There are iii kinds of matter, solid, liquid, and gas. When there is a modification in temperature when there is a rise in temperature the solid becomes liquid and eventually, the liquid becomes gas.

The arrangement of gases in it increases the order of the number of atoms. So it can be identified by seeing the moles of elements that are shown in the chemical formula of gas.

Thus, the arrangement of gases is C₂H₄-CH₄-CH₂O-SO₂-Cl₂.

To learn more about gases, refer to the link:

https://brainly.com/question/10110040

#SPJ2

Mg(s) + CuSO4(aq) → Cus) + MgSO4(aq)
What are the products?

Answers

Answer:

Products are copper and magnesium sulphate

Explanation:

[tex]{ \bf{A+B→C+D}}[/tex]

A and B are reactants

C and D are products

A 1-L soda bottle contains dissolved carbon dioxide gas. Which bottle would have the highest concentration of dissolved gas?
a bottle that is sealed
a bottle that was opened 1 minute ago
a bottle that was opened 1 hour ago
a bottle that was opened 1 day ago
Mark this and return

Answers

Answer:

A bottle that is sealed would have the highest concentration.

Explanation:

When you put a gas into a container, the concentration or the amount of mol inside the bottle would be highly concentrated. If you open the bottle, the CO2 would spread outwards and leave the bottle giving more room between each molecule. The longer you open the bottle, the less concentrated the gas will be.

I need help on this, It’s due today. Please, anybody

Answers

Answer:

1 = 252g, 2 = 2mL, 3 = 1.5mL, 4 = 3g, 5 = 225g, 6 = 0.92g/mL, 7 = 0.75g/mL, 8 = 0.71g/mL, 9 = 1.9mL, 10= 1.11mL, 11 = 76.9g

Explanation:

This problem is testing how well you can move around the equation D = m/v where D = Density (g/mL), m= mass of sample (g), v = volume of sample (mL).

Dissolving salt in water is what kind of reaction

O Endothermic reaction
O Exothermic reaction
O No answer text provided
O No answer text provided

Answers

Answer:

endothermic reaction

Explanation:

because salt dissolve water

Answer:

EXOTHERMIC REACTION AS WHEN YOU TOUCH IT YOU WILL FEEL SOME HEAT.

Which result would support the particle theory of light? Increasing the intensity of the light causes electrons to be ejected. Frequencies of light that fall below the frequency threshold of the metal do not eject electrons. There is a time gap between when light strikes the metal and when electrons are ejected.

Answers

Frequencies of light that fall below the frequency threshold if the metal do not eject electrons.

Suppose it takes 21 min for 2.4 g of sugar to completely react with another reagent we added to the flask. What would the reaction rate be

Answers

rate = delta grams/delta time = 2.4/35 = ?

can any one tell me same for ALCL3 I need it urgently plzzz ​

Answers

Lets Form bonds

Al=2,8,3

Lets Write actual configuration or modern

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^3[/tex]

It has valency +3Cl:-2,8,7

Let's write configuration

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^5[/tex]

It has valency -1

Now Criss cross valency (Refer to attachment)

We get

[tex]\\ \sf\longmapsto AlCl_3[/tex]

on what bases are the elements of periodic table classified?​

Answers

The elements can also be classified into the main-group elements (or representative elements) in the columns labeled 1, 2, and 13–18; the transition metals in the columns labeled 3–12; and inner transition metals in the two rows at the bottom of the table (the top-row elements are called lanthanides and the bottom-row ...

Hello,

What are Elements?

Elements are a group of the Periodic Table that shares common valence electron structures. They are arranged in order of increasing Atomic Number.

Now back to the question:-

In modern periodic table they are classified into three parts- metals, non-metals and metalloids.

In detail:-

Metals- Metals are those elements which donate electrons. Ex- Na, K, Rb, Mg, Ca, etc.

Non-metals- Non-metals are those elements which accept electrons. Ex- N, O, F, Cl, etc .

Metalloids- Metalloids are those elements which show property of both metals and non-metals. Ex- B, Si, Ge, etc.

Hope it helps...

(by Benjemin)

Why do scientists use models of molecules?

A. To research the known effects of the molecule on the environment

B. To explain how electrons, protons, and neutrons are arranged

C. To show the structure of molecules, which are too small to see

D. To design an experimental setup to synthesize molecules

Answers

Answer:

C

Explanation:

You want to test the effect of soil acidity on plant growth. Which of the
following is an example of a controlled experiment to test this?
A. The plant type, amount of light, and amount of water are kept
constant while soil acidity is varied for plants in a greenhouse.
B. The soil acidity of plants in a garden that get light and water from
their surroundings is increased after the plants grow to a height of
100 cm.
C. The plant type, soil acidity, amount of light, and amount of water
are all varied and studied in a laboratory.
D. Soil acidity and height of plants growing in a 10 m2 yard are
measured twice in July and twice in August.

Answers

Answer:

I believe the answer to your question would be A. this is because it is controlled with a good habitat and also has good variants that are needed in a good plants growth.

Explanation:

How is gas pressure useful

Answers

Answer: Gas pressure is employed in a variety of industrial operations, and it was the catalyst for the industrial revolution. Many industrial machines were powered by steam in the early twentieth century. To heat the water molecules inside massive boilers, wood was burned.

(b) Liquids and gases flow because…?

Answers

The molecules of gases and liquids are present far apart from each other. In other words, they have more gaps or intermolecular spaces. Due to the large intermolecular forces, the intermolecular attractions are very less and thus liquids and gases can flow.

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