A scientist who wants to study the effects of a new fertilizer on plants would probably

Answer:

Hydrogen is usually classified as a group 1 element since it has one valence electron, just like group 1 metals.

Explanation:

Answer:

All are periodic changes

[And is that a todoroki pfp, I like MHA too

(・∀・) ]

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).

Answer:

B and A.

Explanation:

Many of the great scientists were religious. But the answer is not D.

A scientist may have strong opinions. That was certainly true of Newton. Most of the time he was right. Still the answer is not C. Science requires an open mind.

The answer is between A and B. Many discoveries were made looking at the natural world. That may provide the inspiration. But I don't think it is the answer. I'm going to say A

B is the other answer. Between A and B many scientific truths have been discovered.

Answer:

A. neutral

Explanation:

It's net charge is 0.

Answer:

A. neutral

Explanation:

A neutron is given by formular

[tex]» \: \: {}^{1}_{0}n[/tex]

hence it's net charge is zero

Answer:

Overall, the main function of the corolla is to assist in the reproductive process of the plant. The petals of the corolla are designed to aid in pollination, and therefore, increase the chance of successful reproduction of the flower.

to assist in the reproductive process of the plant...

Answer: mass is the amount of matter in one object or substance

Explanation:

Answer:

Because to them it was just a little bit of fiction. so they don't really think it's necessary to do experiments or make detailed observation

Explanation:

it's just like how we presently today discuss about robot talking to us like humans but it's not yet come to pass .

Explanation:

idea= hypothesis

xperience in nature= read Darwin's theory..

with birds from Galapagos island or rain forest environment., had proven that the shape of a bird's beaks, determined what their diet consisted of In the wild.

captured birds from such countries, has proven, an omnivore or seed eater...through testing plus dissection.

i found this. there's more coming up

Answer:

Use the edit icon to pin, add or delete clips.

Explanation:

hfdknvd hcde

Answer:  0.050 moles of NaOH

Explanation:  The molar mass of NaOH is 40.0g/mole

2.0g/40.0g/mole  =  0.050 moles (2 sig fig)

Answer:

it's yellowish in color plz Mark me as brainliest

Answer:

It's a yellowish color like copper

Comparing the data obtained online, the first group is more precise

The reason the above selection is correct is as follows;

Question: Parts of the question appear missing from a similar question online and included here;

First Group:

[tex]\begin{array}{|c|c|c|c|c|c|c|} Team \ a &Team \ b&Team \ c&Team \ d&Team \ e&Team \ f&Team \ g\\2.77 \ cm&2.60 \ cm&2.80 \ cm&2.65 \ cm&2.75 \ cm&2.65 \ cm& 2.68 \ cm\end{array}\right][/tex]

Second Group

[tex]\begin{array}{|c|c|c|c|c|c|c|} Team \ a &Team \ b&Team \ c&Team \ d&Team \ e&Team \ f&Team \ g\\2.70 \ cm&2.78 \ cm&2.62 \ cm&2.65 \ cm&2.75 \ cm&2.80 \ cm& 2.60 \ cm\end{array}\right][/tex]

Calculations for the first group:

The average = (2.77 + 2.60 + 2.80 + 2.65 + 2.75 + 2.65 + 2.68)/7 = 2.7

The range = 2.80 - 2.60 = 0.20

The approximate ± range of the average = ±0.2/2 = ±0.1

The precision of the first measurement is 2.7 ± 0.1 cm

Calculations for the second group:

The average = (2.70 + 2.78 + 2.62 + 2.65 + 2.75 + 2.80 + 2.60)/7 = 2.7

The range = 2.80 - 2.60 = 0.20

The approximate ± range from the average = ±0.2/2 = ±0.1

The range of values from the average is approximately ±0.1 cm

The precision of the first measurement is 2.7 ± 0.1 cm

Method to determine precision:

Precision is given by the finding the average deviation and the standard deviation as follows;

[tex]\mathbf{Average \ deviation} = \dfrac{\sum \left | x - \mu \right |}{n}[/tex]

[tex]\mathbf{Standard\ deviation} =\sqrt{\dfrac{\sum \left ( x - \mu \right )^2}{n}}[/tex]

Where;

μ = The mean or average = 2.7

n = The number of items (count) of the data = 7

For the first group, we have;

[tex]\mathbf{\dfrac{\sum \left | x - \mu \right |}{n}} = \dfrac{0.07 + 0.1 + 0.1 + 0.05 + 0.05 + 0.05 + 0.02 }{7} = \mathbf{0.062857}[/tex]

The average deviation of the first group = 0.062857

∑(x - μ)² ≈ 0.0328

[tex]\mathbf{The \ standard\ deviation} =\sqrt{\dfrac{0.0328}{7}} \approx \mathbf{0.068452}[/tex]

For the second group, we have;

[tex]\mathbf{\dfrac{\sum \left | x - \mu \right |}{n}} = \dfrac{0.0+ 0.08 + 0.08 + 0.05 + 0.05 + 0.1 + 0.1 }{7} = \mathbf{0.06571428571}[/tex]

∑(x - μ)² ≈ 0.0378

[tex]\mathbf{The \ standard\ deviation} =\sqrt{\dfrac{0.0378}{7}} \approx \mathbf{0.073485}[/tex]

By using the average deviation, and standard deviation values, the deviation of the second group is more than the first group and therefore the first group is more precise

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Answer:

the surface area of a solid reactant.

temperature.  

presence/absence of a catalyst.

Answer:

Water vapor molecules in the air near the can cooled when energy from the air transferred to the cold can. These water molecules slowed down, condensed to liquid water, and then froze to become ice. Your can might have some water and some ice on the outside of it.

Explanation:

Answer:

264.7

Explanation:

26470 cm = 264.7 m

just move the decimal over two spaces.

Answer:

electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.

Answer:

what is the story about actually.i think it's from ur lesson

Explanation:

certain breads mold easily...(fact)..

especially white bread., when exposed to any moisture, from refrigeration, or freezing..

when taken out of (cold environment), humidity in air causes molding because you take it from cold to/warm environment.

check expiration dates, keep refrigerated, and inspect 4 molding. Companies like WMART, buy in bulk, when on shelf, defrosts,, then has molding within expiration dates..

Answer: all of them

Answer:

all the above

Explanation:

We have that The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .

The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .The Hydrogen atom is devoid of any neutron.The hydrogen atom is made up of one electron and one proton.

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Answer:

1. A mental can be hammered into thin sheets and nonmetals are brittle

2. C vanadium

3. C silicon

4. B hydrogen does not have neutron

5. B francium has few valence electrons but they are in a higher energy level

annnoymousheyy avatar

6. A.

protons = 31

neutron = 39

electron = 28

7. C isotopes that are naturally occurring and unstable always exist in trace amount

8. C atomic number

9. B electrons move freely in curved paths around the nucleus

10. A low energy alpha particles passing through a field of high mass number particles

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11. C on the right side of the periodic table

12. A nitrogen

13. A fluorine , chlorine , and iodine

14. C an ionic bond is likely because they will want to give away two valence electrons in order to become stable

15. D -2

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16. The change in atomic number from 10 to 11

implies a change from a noble gas to a highly

reactive group 1 element. As a result of this,

reactivity increases. The atomic number of an element tells us the group to which the element belongs in the

periodic table.

annnoymousheyy avatar

An atomic number of 10 shows a filled outermost shell which is characteristic of the noble gases. Hence, as we move from this atomic number of

10 to an atomic number of 11, reactivity increases

positively. Atomic number 11 corresponds to a highly

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17. The periodic table shows a correlation between the strength of the ionic connection and the position of the elements on the table. Because metals are positively charged and non-metals

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are negatively charged, if you start on the left side of the periodic table and work your way right, the ionic charge and radius will gradually decrease and the charge will lessen.

To clarify, oxygen is a nonmetal with a little negative charge, whereas lithium is a metal with a positive charge

Explanation:

A dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.

A chemical reaction is the process by which substances called reactants are transformed to another substance known as products through the breaking up or building up of bonds between the reactants.

There are different types of chemicals reaction which includes condensation reaction.

Condensation reaction involves the combination of two smaller molecules known as monomers to for one larger molecule known as polymer with the loss of water molecule.

Condensation reaction is specifically called dehydration reaction due to the loss of water molecule that is involved.

Therefore, a dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.

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Answer:

And the ans is yellowish

Nguyên tố hóa học, thường được gọi đơn giản là nguyên tố, là một chất hóa học tinh khiết, bao gồm một kiểu nguyên tử, được phân biệt bởi số hiệu nguyên tử, là số lượng proton có trong mỗi hạt nhân.

Answer:

8

Explanation:

Electronic configuration of Calcium = 2, 8, 8, 2

M shell = 3rd energy level

Maximum number of shells in m shell is 8

We have that this how they differ

Physical properties

Chemical Properties

From the Question we are told that

Silicon properties:

a. blue-gray color

b. brittle

c. doesn't dissolve in water

d. melts at 1410°C

e. reacts vigorously with fluorine

Physical properties

This Refer to Properties that can be seen and  Measured

While

Chemical Properties

This are Refers to the effect of the element in reactions

Therefore

Physical properties

Chemical Properties

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Answer:

The extract is boiled with FeSO4 and acidified with concentrated H2SO4. The appearance on Prussian blue colour indicates the presence of nitrogen

Explanation:

PLS mark it brainliest

ANSWER:

I calculated it in g/cm^3, It equals 0.9982 g/cm^3

The density of water at 20°C is found to be 0.9982 g/mL.  

Density may be defined as the classical measurement of quantity or mass per unit of volume in a particular substance. According to mathematics, density is simply characterized as mass divided by volume. That is:

[tex]Density = \frac{Mass }{Volume }[/tex]

Density typically describes how much space an object or substance takes up in relation to the amount of matter in that object or substance.

Density only significantly depends on the mass of the body as well as the volume occupied by it. The SI unit of density is kg/[tex]m^3[/tex]. The density remarkably does not vary much with respect to the temperature.

Therefore, the density of water at 20°C is found to be 0.9982 g/mL.  

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