Which technique can be used to remove air bubbles from a syringe? a) Hold the syringe downward, shake vigorously for 10 seconds, and expel the bubbles through the needle using the syringe plunger. Hold the syringe upright, provide a firm tap or flick to the b) barrel, and expel the bubbles through the needle using the syringe plunger. Hold the syringe upright, shake vigorously for 10 seconds, c) and expel the bubbles through the needle using the syringe plunger. Hold the syringe downward, provide a firm tap or flick to the d) barrel, and expel the bubbles through the needle using the syringe plunger.

Answers

Answer 1

Answer:

Point the syringe upright and tap firmly to move the bubbles to the top and expel by pushing the plunger

Explanation:

If you hold the syringe upside down the bubbles will end up at the bottom of the syringe by the plunger since they float up when tapped


Related Questions

Help, will mark brainiest if the answer is correct(explanation is preferred but not needed).

Answers

Answer:

See graph below

Explanation:

 For this graph of acid-base (strong) the equivalence is just ph = 7

HELP ME OUT PLS!!!!!!!!!

All stars begin their life in a

O black hole

O main sequence

O protostar

O nebula​

Answers

Answer:

nebula

Explanation:

I am well informed

Which type of covalent bond is the least stable?
A.Covalent bonds
B.Double bonds
C.Single bonds
D.Triple Bonds

Answers

Answer:

D because: A Triple bond is when three pairs of electrons are shared between two atoms in a molecule. It is the least stable out of the three general types of covalent bonds.

Question 4 of 15
The types of radiation produced by alpha, beta, and gamma decay differ in
many ways. Which characteristic do they all have in common?
A. The ability to treat cancer
B. The ability to cause cancer
C. The ability to trace the movement of chemicals
D. The ability to damage human tissue

Answers

Answer:

D. The ability to damage human tissue

please give me brainliest.

Which mixture would be easiest to separate based on the size of the particles?
A.
oil and water
B.
vinegar and water
C.
sand and gravel
D.
sugar and water

Answers

Answer:

i believe sand and gravel because you can sift the sand

Explanation:

...................................................

Answers

Explanation:

I honestly don't understand why you post useless questiond

calculate, a can of chicken broth contains 450 mg of sodium chloride in 240.0g of broth. What is the percent by mass of sodium chloride in the broth?

Answers

Answer:

The percent by mass of sodium chloride in the broth is 0.1875 %

Explanation:

Our first step is transforming the sodium chloride figure from mg to g

450mg x 1g/1000 mg= 0.45g

Now, we must calculate the percentage by using the following formula:

0.45g / 240g x 100= 0.1875%

Henceforth, we can conclude that the percentage by mass of sodium chloride in the broth is 0.1875%

The per cent by mass of sodium chloride in the broth is 0.1875 %

What is per cent by mass?

The mass per cent of a component of a compound is the percentage ratio of the mass of the component by the total mass of the compound. The formula is mass per cent = (mass of component / total mass of compound) × 100.

Given data:

Mass of sodium chloride =450 mg = 0.45g

Now, we must calculate the percentage by using the following formula:

[tex]\frac{0.45gX 100}{240g }[/tex]

= 0.1875%

Hence, we can conclude that the percentage by mass of sodium chloride in the broth is 0.1875%

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the only solid figure that has two circular bases is a

Answers

Cylinder

Cylinder A cylinder is a solid figure with two parallel congruent circular bases.

Answer:

Cylinder

Explanation:

A cylinder is a solid figure with two parallel congruent circular bases.

Determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76 × 103 kJ/mol. A. 113 nm B. 885 nm C. 68.0 nm D. 147 nm E. 387 nm

Answers

Answer:

The wavelength of light is 68 nm.

Explanation:

Given data:

Binding energy of electron = 176 × 10³ Kj/ mol or (1.76× 10⁶ j/mol)

Wavelength of light require to remove the electron = ?

Name the following ketone:
o
CH3CCH3

Answers

Answer: the answer is A

Explanation:

just finished this on acellus

Acetone is the name of the following compound and can also be referred to as 2-propanone.

What is a ketone?

ketone, any of a class of organic compounds characterized by the presence of a carbonyl group in which the carbon atom is covalently bonded to an oxygen atom.

Acetone, an organic compound, is chemically described as [tex]CH_3COCH_3[/tex], and can also be referred to as 2-propanone.

Acetone is a hydrocarbon derivative, more specifically a ketone in its simplest form because of its particular functional group.

Hence, acetone is the name of the following compound and can also be referred to as 2-propanone.

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What is the process of photosynthesis

Answers

Answer:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar

If the actual yield for a substance is 39.487g but the theoretical yield is 38.000g, what is
the percent yield?
a. 2%
b. 96%
c. 50%
d. 104%

Answers

Answer:

b. 96%

Explanation:

A lab technician determines the boiling point elevation of an aqueous solution of a nonvolatile, nonelectrolyte to be 1.12 C. What is the solution’s molality?

Answers

Answer:

2.19m

Explanation:

quizlet

Which types of particles are involved in a fission reaction?

A neutral neutron strikes a large neutral nucleus.

A positive proton strikes a large positive nucleus.

A neutral neutron strikes a large positive nucleus.

A positive proton strikes a large neutral nucleus.

Answers

The first one a neutral neutron strikes a large neutral nucleus

Consider the following reaction where Kc = 55.6 at 698 K.

H2(g) + I2(g) 2HI(g)

A reaction mixture was found to contain 2.29×10-2 moles of H2(g), 3.80×10-2 moles of I2(g) and 0.254 moles of HI(g), in a 1.00 liter container.

Is the reaction at equilibrium?
If not, what direction must it run in order to reach equilibrium?

The reaction quotient, Qc, equals
.

The reactionfill in the blank 2

A. must run in the forward direction to reach equilibrium.
B. must run in the reverse direction to reach equilibrium.
C. is at equilibrium.

Answers

Answer:

B

No the reaction is not at equilibrium

The reaction must run to the left (reactants) to reach equilibrium

Qc = 74.14

Explanation:

Qc = (0.254)^2 / ((2.29 x 10-2)(3.8 x 10-2))

Qc = 74.14

74.14 > 55.6

Qc > Kc

is mixing water and glue a chemical or physical change?

Answers

Answer:

physical

Explanation:

because it would still remain as a liquid. if you were to add borax or something to it, then it would be a chemical change.

What is the pH of
0.000519 M NaOH?

Answers

The pH of the sodium hydroxide (NaOH) solution at the given concentration of 0.000519 M is determined as 10.72.

What is pH of solution?

The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration  [H+] of the given solution.

Concentration of the basic solution, [OH⁻] = 0.000519

pOH = -log[OH⁻]

pOH = -log[0.000519]

pOH = 3.28

pH of the solution

pH + pOH = 14

pH = 14 - pOH

pH = 14 - 3.28

pH = 10.72

Thus, the pH of the sodium hydroxide (NaOH) solution at the given concentration of 0.000519 M is determined as 10.72.

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What is the molarity of a solution made by adding 1.565 moles of
PbNO3 to 0.500 L?
300. M
31.3 M
3.13 M
1.56 M

Answers

Answer:

3.13M

Explanation:

Using the Molaitry equation ( M = n/v ) just plug numbers in and solve.

Which characteristic of an outermost shell is required for an atom to not need any electrons?

1 electron
more than 2 electrons
more than 21 electrons
a full

Answers

Answer:

A full.

Explanation:

An electron needs to have a full octet do not need any more electrons. So the correct option is D.

What is a valence shell?

The s and p electrons in the outermost shell are valence electrons. Core electrons are those found in the inner shell. Valence electrons are little subatomic particles that we come across as we examine and investigate an element's atom. We can trace the valence electrons and forecast the sorts of bonds with the aid of Lewis structures.

The majority of valence electrons are negatively charged particles, and they are all grouped in various orbitals or shells. Additionally, these electrons are in charge of how atoms interact with one another and create chemical bonds.

However, not every electron belongs to an atom. A chemical bond or molecule can only be created by the electrons that are found in the outermost shell. Valence electrons are the name given to this sort of electron.

Therefore the correct option is D.

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Which of the following are true about photosynthesis and cellular respiration. (Select all that apply.)


The products of one process are the reactants of the other.


The relationship between them enables life to survive as we know it.


They both happen only in plants.


They both take place in human cells.

Answers

Answer:

2 and 4 are the best answers

Explanation:

Answer:

A and B

Explanation:

Took the k12 test.

calculate the concentration of HCL

Answers

to find:

the concentration of HCI

solution:

[tex]mass \: formula \: of \: hci = 1 + 35.5[/tex]

[tex] = 36.5[/tex]

[tex]mass = relative \: formula \: mass \times amount[/tex]

[tex] = 36.5 \times 0.125[/tex]

[tex] = 4.56g | {dm}^{3} [/tex]

hence, the concentration of HCI is 4.56g/dm3.

Which of these activities would a Forensic toxicologist NOT preform?

a. Determine the chemical
makeup of alcohol

b. Determine if drugs played a role in an accident.

c . Determine if drugs played a role in a perpetrator actions.

d. Determine if a person died of natural causes or a poison.

Answers

Answer:

A

Explanation:

because I know it from doing a test

Ammonia is a gas for which reliable analytical methods are available to determine its concentration in other gases. To measure flow in a natural-gas pipeline, pure ammonia gas is injected into the pipeline at a constant rate of 72.3 kg/min for 12 min. Five miles downstream from the injection point, the steady-state ammonia concentration is found to be 0.382 wt %. The gas upstream from the point of ammonia injection contains no measurable ammonia. How many kilograms of natural gas are flowing through the pipeline per hour?

Answers

amount of ammonia injected:

72.3 kg/min x 12 min = 867.6 kg

ammonia concentration = 0.382%

[tex]\tt 0.382\%=\dfrac{mass~amonia}{mass~ammonia+mass~natural~gas}\times 100\%\\\\0.00382=\dfrac{867.6}{867.6+mass~natural~gas}\\\\mass~natural~gas=226,252.88~kg/12min=1131264.4~kg/h[/tex]

A manometer measures 450 torr of pressure in a container with 0.500-L sample of carbon dioxide, CO2. The gas is compressed to a volume of 0.100 L. What is the new pressure reading in the manometer?

Answers

Let's see

Apply boyles law

P1V1=P2V2450(0.5)=0.1P_2225=0.1P_2P_2=2250Torr

a pharmaceutical company wants to extract an ingredient from pomace supplied by a certain food processing plant. which process is the most efficient with the lowest environmental impact

A. Catalyst extraction
B. High pressure, high temperature water extraction
C. Organic solvent extraction
D. Enzyme extraction

Answers

Answer: high pressure, high temperature water extraction

Explanation:

Answer:

C). high pressure, high temperature water extraction

Explanation:

Which substance will hold its shape?

plasma
liquid
gas
solid

Answers

Answer:

solid

Explanation:

plasma = no

liquid= shapes is container it is in

gas = shaped to container also

PLEASE QUICKLY HELP:)

which entry-level job would give you the best experience for a career in the lodging sector?

Choose one answer correctly!

A. Hostess
B. Réservation agent
C. Sever
D. Tour guide​

Answers

Answer:

i think Hostess but id K a lodging sector is an The hospitality industry encompasses a wide range of services and activities such as lodging, restaurants, food services, and convention centers. The lodging sector consists of hotels, motels, resorts, and bed and breakfasts.

Explanation:

Determine the empirical formula of a compound containing 48.38 grams of carbon, 8.12 grams of hydrogen, and 53.5 grams of oxygen

Answers

As with most stoichiometry problems, it is necessary to work in moles. The ratio of the moles of each element will provide the ratio of the atoms of each element.

Get the mass of each element by assuming a certain overall mass for the sample (100 g is a good mass to assume when working with percentages).

Remeber that percentages are a ratio multiplied by 100. You must convert percentages back to their decimal value before working with them.

(.4838) (100 g) = 48.38 g C

(.0812 ) (100 g) = 8.12 g H

(.5350) (100 g) = 53.38 g O

Convert the mass of each element to moles of each element using the atomic masses.

(48.38 g C) (1 mol/ 12.10 g C) = 4.028 mol C

(8.12 g H) (1 mol/ 1.008 g H) = 8.056 mol H

(53.38 g O) (1 mol/ 16.00 g O) = 3.336 mol O

Find the ratio or the moles of each element by dividing the number of moles of each by the smallest number of moles.

Use the mole ratio to write the empirical formula.


Reactivity Series
Iron, tin and zinc all react with dilute hydrochloric acid to produce hydrogen.
Plan an experiment to determine the order of reactivity of iron, tin and zinc.
You are provided with powdered samples of the metals and common laboratory apparatus.

Answers

Answer:

Measuring electode potential

Explanation:

Make an electrode of all of them and measure standard reductive potential metals with lower srp will be more reactive

The metals which are placed above the hydrogen in the reactivty series can produce hydrogen gas with HCl. The order of reactivity of given metals is as follows: Zinc > iron > tin.

What is reactivity series?

The reactivity series of elements or the activity series can be defined as the arrangement of metals in descending order according to their reactivities.

The metals placed at the top of the activity series are strong reducing agents and can be readily oxidized. These metals readily tarnish/corrode. The reducing ability becomes weaker while moving down the reactivity series.

The electropositivity of the elements decreases as we move down in the reactivity series of metals. All metals which are placed above hydrogen in the activity series can able to release hydrogen gas upon reacting with dilute HCl.

Therefore, the metals Iron, tin, and zinc release hydrogen gas when they react with the HCl. The order of reactivity is according to their reduction potential which is Zinc > iron > tin.

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What is the electrical conductivity of Copper and Glass?

Please help

Answers

Answer:

Table of Resistivity and Conductivity at 20°C

Material ρ (Ω•m) at 20 °C Resistivity σ (S/m) at 20 °C Conductivity

Deionized water 1.8×105 5.5×10−6

Glass 10×1010 to 10×1014 10−11 to 10−15

Explanation:

Table of Resistivity and Conductivity at 20°C

Material ρ (Ω•m) at 20 °C Resistivity σ (S/m) at 20 °C Conductivity

Deionized water 1.8×105 5.5×10−6

Glass 10×1010 to 10×1014 10−11 to 10−15

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