Someone answer this tysm

Answer:

5.029 × 100

Explanation:

Answer:

1)Mixture is the combination of substance

2)There are two types of mixture such as heterogeneous mixture and homogeneous mixture

3)foreg=Salt solution ,sedimentation

Pure substance

1)Pure substances are also called elements

2)They are made up of small atoms

3)for eg= oxygen,Venadium ,Iron,Oxygen

The relative standard deviation for the set of data obtained by the student is 0.470%

The formula for calculating the relative standard deviation is given below as:

Relative standard deviation (RSD) = (S * 100)/x

where S stands for the standard deviation and x is the mean of the data set.

The following are the steps to calculate to determine the relative standard deviation using the given formula:

Step 1: Calculate the mean of the numbers in the data set.

mean, x = sum of numbers / number of numbers

(40.220 + 40.654 + 40.314 + 40.165 + 40.554)/5

mean = 40.381 g/mol

Step 2: Subtract the mean from each number in the data to determine the deviation for each number and then square the deviations.

(40.220 - 40.381)² = 0.0259

(40.654 - 40.381)² = 0.0745

(40.314 - 40.381)² = 0.00449

(40.165 - 40.381)² = 0.0466

(40.554 -40.381)² = 0.0299

Step 3: Sum the squared deviations.

0.0259 + 0.0745 + 0.00449 + 0.0466 + 0.0299 = 0.181

Step 4: Determine the variance by dividing the sum of the squared deviations by the total number of values.

Variance = 0.181/5 = 0.0362

Step 6: Determine the standard deviation of the data by taking square root of the variance.

Standard deviation, S = √0.0362 = 0.190

Step 7: Determine the relative standard deviation by inserting the values in the formula, (RSD) = (S * 100)/x

RSD = (0.190 * 100)/40.381

RSD = 0.470%

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Answer:

conclusions i think i am not confirmed

Answer:

b-data

Explanation:

right on the unit test review on edge

brainliest???

Answer:

a chemical property

Explanation:

Answer: 60.2g

Explanation:

One mole acetic acid weighs 60.2g

Answer:

weight = Mass × gravity

P= m × g

P=mg

Weight (P) = ? , Mass (m) = 2 kg , gravity (g) = 9.8 m/s²

P= mg

p = 2 × 9.8

P= 19.6 kg.m/s²

P= 19.6 N

I hope I helped you^_^

Answer:

the correct answer is option B batteries use chemicals to store energy

We have that the statement that remains true about batteries is

"Batteries use chemical to store energy "

Option B

-All battery are able to be recharged that is not correct as some batteries are non rechargeable

-A battery is a device composed of petrochemical cells, that rel sole upon the energy from chemical reactions to give off charge

-A battery is a device that is use to store energy. Therefore Batteries to not conserve energy

Hence the statement that remains true about batteries is

"Batteries use chemical to store energy "

Option B

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Answer:juhygjdkeExplanation:

Mendelevium is named for Dmitri Mendeleev who produced one of the first periodic tables.

Abelson first found neptunium in 1940 after uranium had been bombarded by neutrons from the cyclotron at Berkeley, California. ... The element was named after the planet Neptune, which is the first planet beyond Uranus.

Answer in explanation

Explanation:

neptunium was named after the discovery of the planet neptune in september 23 1846

mendelevium was named as dimitri mendeleev

Answer:  This is only a guess:  The "following chemical formula:      " doesn't appear on my screen.  But since you mentioned Mg and Cl, I would guess MgCl2

Explanation:  Mr loses 2 electrons while each Cl gains one each:  Two chlorines for every 1 magnesium.

Answer:C

Explanation:

Answer:

C

Explanation:

To find the new pressure, we will use this formula: P₁V₁/T₁ = P₂V₂/T₂

P₁ = Original pressure (755.2)

V₁ = Original volume (188.5)

T₁ = Original temperature in kelvins (26.7 + 273.15 = 299.85)

P₂ = Final Volume (?)

V₂ = Final volume (210.5)

T₂ = Final temperature in kelvins (165.2 + 273.15 = 438.35)

Here is our equation

(755.2)(188.5)/(299.85) = (210.5)P₂/(438.35)

Hopefully, you have a calculator handy because this equation will end up looking like this:

474.75471 = (0.48021)P₂

Divide both sides by the coefficient

474.75471/0.48021 = (0.48021)P₂/0.48021

P₂ = 988.64

Hey there! Here is the answer:

B.) decrease; increase

Here's why:

As you move from left to right across a period on the periodic table the size of an atom will decrease. As you move from top to bottom down a group on the periodic table the size of an atom will increase.

I really hope this answer helps you out! :)

Answer:

a. Are potentially dangerous and should not be worn.

Answer:

cm

Explanation:

for short measurements

Answer:

A= 15 atoms B= 3

Explanation:

5 x 2 + 5 x 1

3 + 2 x 1

Answer:

Ethylenediaminetetraacetic acid (EDTA), heparin, and citrate are the most commonly used anticoagulants (39–41). pls mark me branilest

Answer:

The outermost (valence) shell of argon has eight electrons, making it exceedingly stable and, thus, chemically inert. Argon atoms do not combine with one another; nor have they been observed to combine chemically with atoms of any other element.So argon is an inert gas

Answer:

because argon have 8 electrons in there outmost shell

which is enough to make it stable

Answer:

right answer is option no c

Explanati  la materia el convino

es carbón ya irogno

ed

Answer:

Basic oxides are oxides that show basic properties in opposition to acidic oxides and that either react with water to form a base; or react with an acid to form a salt and water which are called neutralization reactions.

Explanation:

Mark me as brainiliest

Explanation:

A basic oxide is an oxide that shows basic properties in opposition to acidic oxides and that either ⁕reacts with water to form a base; or ⁕reacts with an acid to form a salt.

Answer:2

Explanation:

Answer:

To produce good or targeted result

It is important to use chemicals of high quality and correct concentrations in experiment so that we can obtain the predictable result in an experiment

Purity of substances/chemicals is very important when performing experiments in the laboratories, because it plays an important role in the determination of the chemical properties of  substances which will have a direct effect on the result obtained from the experiment. likewise using the correct concentration of reagents

During experiments to obtain the best/predictable result in an experiment it is of best practice to make use of chemicals of high quality and also at the exact(needed) concentrations, that way the predictable result of the experiment will be obtained.

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Answer:

C).Iron

Explanation:

Iron has a binding energy of 8.8MeV

Answer:

skip it please, ok...? thank you

The mass of 125 mL of bromine and the volume occupied by 85 g of bromine are:  

Density is simply defined as the mass of an object per unit volume of the object. It can be expressed mathematically as

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

Density = 3.12 g/mL

Volume = 125 mL

[tex]Density = \frac{mass}{volume} \\\\3.12 = \frac{mass}{125}[/tex]

Cross multiply

Mass = 3.12 × 125

Therefore, the mass of bromine is 390 g

Density = 3.12 g/mL

Mass = 85 g

[tex]Density = \frac{mass}{volume } \\\\3.12 = \frac{85}{volume }[/tex]

Cross multiply

3.12 × Volume = 85

Divide both side by 3.12

[tex]Volume = \frac{85}{3.12}\\\\[/tex]

Therefore, the Volume of bromine is 27.24 mL

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Answer:

the answer is actually D. (theories are well established with lots of evidence to support their claims)

Explanation:

i just took the quiz

A hypothesis is a presented reason for a phenomenon based on limited proof and evidence. A scientific theory is an elucidation of an element that has been constantly experimented with and confirmed per scientific approach.

Theories are well established with lots of proof to back their assertions.

Therefore, option D is correct.

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Answer:

2.4* 10⁴ m

Explanation:

1km = 1000m = 10³m

(1*24)km = 10³ * 24 m

=> 24km = 2.4 * 10⁴m