Using the ruler, what is the value of A considering significant
figures?

The percentage of water in the wet sponge is 73.34%.

AMOUNT (IN GRAMS) OF WATER IN THE SPONGE:

59.3 - 15.8

= 43.5 grams.

% mass of water = (mass of water ÷ mass of wet sponge) × 100

% mass of water = 43.5/59.3 × 100

% mass of water = 0.73335 × 100

% mass of water = 73.34%

Therefore, the percent of the initial weight that comes from water is 73.34%

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Answer:

Chemistry is the science of matter, its properties, structure, changes or reactions and the energy that accompanies these changes.

Answer:

potassium cyanide, dinitrogen monoxide, aluminum nitrate

Explanation:

Answer:

A. Chemistry.

Explanation:

Answer: A

Explanation:

I would do all of them but A is the true answer because if you wear like slides the chemical can get on your body and it will be bad so wear sneakers when working with labs.

Answer:

Gas pressure is caused when gas particles hit the walls of their container. The more often the particles hit the walls, and the faster they are moving when they do this, the higher the pressure. This is why the pressure in a tyre or balloon goes up when more air is pumped in.

Answer:

none of the above

Explanation:

Answer:

Cells go through the process of mitosis to make new cells.

Explanation:

 During mitosis, a parent cell splits into two new cells, the new cells are called daughter cells, which are copies of the original cells.

Answer:

the results of an investigation thank me later

Explanation:

Answer:

xenon

Explanation:

Xenon is a non-metal, odorless gas, consist of single atoms, colorless, and 8 valence electrons out of everything else on this list.

Answer:

7.2 kg/L

Explanation:

Density = mass ÷ volume

18 kg ÷ 2.5 L = 7.2 kg/L

The units didn't change in this scenario.

Mass/corresponding weight of liquefied phenol = 1.5408 grams

Mass/corresponding weight of propylene glycol = 63.6 grams

Given that :

Total volume of the water bottles = 24 * 15 ml

                                                        = 360 ml

Volume of recipe after pure water is added = 100 ml

the number of units required = Total volume of water / volume of recipe

                                                = 360 / 100 =  3.6 units

i) Determine the Mass ( weight ) of liquefied phenol

amount of liquefied phenol = 0.4 ml * 3.6 = 1.44 ml

given that density of liquefied phenol = 1.07 g/ml

∴ mass of liquefied phenol = density * volume

                                         = 1.07 * 1.44 = 1.5408 grams

ii) Mass( weight ) of propylene glycol

amount = 17 * 3.6 =  61.2 ml

density of propylene glycol = 1.04 g/ml

∴ mass of propylene glycol = 61.2 * 1.04 = 63.648 grams

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Answer:

[Latin (genitive Orionis)] : a constellation on the equator east of Taurus represented on charts by the figure of a hunter with belt and sword. 2 : a giant hunter slain by Artemis in Greek mythology.

Explanation:

Answer:

a constellation on the equator east of Taurus represented on charts by the figure of a hunter with belt and sword. 2 : a giant hunter slain by Artemis in Greek mythology

Orion constellation is one of the brightest and best known constellations in the night sky. It lies on the celestial equator. Orion has been known since ancient times. The constellation is also known as the Hunter, as it is associated with one in Greek mythology.

Answer:B

Explanation: i got it right

The scientists use weather balloons to measure up to about 100,000 feet of elevation. The correct option is D.

A weather balloon, also known as a sounding balloon, is a balloon that carries instruments aloft to transmit data on atmospheric pressure, temperature, humidity, and wind speed using a small, disposable measuring device known as a radiosonde.

Weather balloons can travel up to 24 miles (39 kilometres) before bursting, and a payload can land (via parachute) up to 75 miles (120 kilometres) away, depending on wind conditions at the launch site.

If the balloon is flexible, it will expand as it rises to lower air pressure altitudes.

To prevent them from popping, weather balloons are only partially filled when released.

Thus, the correct option is D.

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To make 1 Molar solution of hemoglobin ; 1600 grams of hemoglobin will be dissolved in 1 liter of water

The molecular weight of Hemoglobin is approximately  16,000 Daltons, when hemoglobin is converted to mM

16000 Dalton = 16000 ( g/mol )

given that 1 Dalton = 1 g/mol

To make 1 molar solution of hemoglobin using 1 liter of water

1 liter = 1000 grams

16000 Dalton = 16000 g/mol

Hence 16,000 grams of Hemoglobin is required to make 1 Molar solution of hemoglobin using 1 liter of water.

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Answer:

do what you can do not what people tell you to do

Explanation:

Answer:

maybe with baking soda and vinegar

Explanation:

The concentration of the solution is  [tex]26.1 g CsCl/100 g H_2O[/tex].

We have  34.29 mL of water, whose density is 0.9975 g/mL. The corresponding mass of water is:

[tex]34.29 mL \times \frac{0.9975g}{mL} = 34.20 g[/tex]

8.91 g of CsCl (solute) are in 34.20 g of water (solvent). We can calculate the concentration of Bam's solution in units of g solute/100 g solvent, using the following expression.

[tex]C = \frac{mass\ solute }{mass\ solvent } \times 100 = \frac{8.91 g }{34.20 g } \times 100 = 26.1 g CsCl/100 g H_2O[/tex]

The concentration of the solution is  [tex]26.1 g CsCl/100 g H_2O[/tex].

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Explanation:

the mass of the object is 123.97-89.62=34.35g

the volume is 55.4-47.3=8.1ml

the density is 34.35/8.1=4.2g/ml

Answer:

That would be helium, with a melting point of 0.95 K (-272.20 °C)—although this happens only under considerable pressure (~25 atmospheres). At ordinary pressure, helium would remain liquid even if it could be chilled to absolute zero.

Answer:

By evaluating the intermolecular forces and size!

Explanation:

Essentially the stronger the forces the higher the melting point... Here is a list of interemolecular forces (the first will be the weakest).

1) Dispersion forces (Exhibited by evrey molecule) (Weakest)

2) Dipole-Dipole

3) Hydrogen bonding

4) Ionic bonds (Strongest)

The stronger the forces it has then the higher the melting point. Also aromatic structures have a higher melting point as well. A general rule of thumb is, the larger the structure is then the higher thee melting point it.

Answer:

#1 Is a

Explanation:

Answer:

To find the number of neutrons in an isotope, subtract the number of protons from the atomic mass of the isotope. The atomic number of the element equals the number of protons.

Answer:

i don't understand

Explanation:

Ii don't understand

[tex]\begin{gathered} {\underline{\boxed{ \rm{\red{Mass \: = \: Density × Volume}}}}}\end{gathered} [/tex]

[tex]\large\bf\blue{ \diamond} \: \rm \: \: 30 \: \times \: 2 \\ \\ \large\bf\blue{ \diamond} \: \rm \: 60 \: kg[/tex]

Mass of object is 60 kg

Answer:

112 L O2.

Explanation:

Explanation:

CH4(g)+2O2(g)=CO2(g)+2H2O. 58.2l/22.4l=2.60moles CH4*2=5.20 moles H2O

Answer:

54.883, so rougly about 54.9 liters.

Explanation:

To convert gallons to liters, multiply the amount of gallons by 3.785.

14.5 * 3.785 = 54.883

Taking into account the change of units, the size of the tank is 54.88 liters.

In first place, the rule of three is a tool used to quickly solve problems involving a proportional relationship between two variables.

The rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), the direct rule of three should be applied.

The rule of three is applied as follows, with A, B and C being known values ​​and D being an unknown value: if A maintains a certain relationship with B, and it is known that C and D have the same relationship, it is possible to calculate the unknown value D using the following expression:

[tex]D=\frac{CxB}{A}[/tex]

In this case, the rule of three can be applied as follows: if 1 gallon is equal to 3.785 liters, 14.5 gallons are equal to how many liters?

[tex]D=\frac{14.5 gallonsx3.785 liters}{1 gallon}[/tex]

Solving:

D= 54.88 liters

In summary, the size of the tank is 54.88 liters.

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Using the laws of indices, the 2.71 x 10^-2 x 1.00 x 10^-6 would give a significantly smaller value while 2.71 x 10^-2 / 1.00 x 10^-6 will give a significantly larger value.

The laws of indices can be used to solve problems that involves a base and an index.

In this case; if we apply the multiplication law;

[tex]2.71 x 10^-2 x 1.00 x 10^-6 = 2.71 x 10^-8[/tex]

This result is significantly smaller than [tex]2.71 x 10^-2[/tex]

Using the division law;

[tex]2.71 x 10^-2 / 1.00 x 10^-6 = 2.71 x 10^4[/tex]

This result is significantly larger than [tex]2.71 x 10^-2[/tex].

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Answer:

please I don't understand the question, rewrite it