help please
According to the data what kind of substance is gastric juice?

A.
it is a weak acid since the blue litmus paper turns red and the pH is 1.7

B.
it is a strong base since the blue litmus paper turns red and the pH is 1.7

C.
it is a strong acid since the blue litmus paper turns red and the pH is 1.7

D.
it is a weak base since the blue litmus paper turns red and the pH is 1.7

According to the website that I use to figure out things about science or chemistry and that stuff... The answer is 3.5 L KBr x 1.7 mol KBr solute / 1 L KBr solution x 1 mol Cl2 / 2 mol KBr x 70.9 g Cl2 / 1 mol Cl2 = 211 g Cl2.

Answer:

0.38

Explanation:

The formula for finding density is mass/volume. So the equation becomes 6.39/16.5 which gives you 0.38

Answer:

Acetone

Explanation:

Chromatography has to do with the separation of substances by eluting the components of the solute using a mobile phase. The composition of the mixture to be separated decides the mixture of solvents (mobile phase) that are to be used for elution.

In this case the mixture to be separated comprises of substance A which is polar and substance B which is non polar. It is observed that the mobile phase moves B up the plate but not the polar substance, A. This means that a polar solvent such as acetone should be added to the mobile phase in order to achieve better elution of A.

Answer:

devide by avogadro constant 6.02*10^23

Explanation:

Answer:

HAT IS THE QUESTIN? hehehe

Explanation:

lol

Answer:

1×10^5

Explanation:

Pressure = Force/Area

P= 10/0.0001

P= 10000

P=1×10^5

Answer:

529.50g

Explanation:

Molar mass find by looking at the periodic table and add all the molar mass of the chemicals together

Mg=24.30g

N=14.01g

O=16.00g

Mg(NO3)2=24.30+(14.01+16.00x3)x2=148.32g/mol

148.32x3.57=529.50g

Answer:

1.46 mol of H₂

Explanation:

This easy question can be solved by a rule of three.

At STP conditions, we know that 1 mol of any gas is contained in 22.4L.

So let's make the operation:

22.4L is the volume for 1 mol of any gas, at STP

32.6 L may be the volume for (32.6 . 1) /22.4 = 1.46 moles.

We can also apply, the Ideal Gases Law.

At STP conditions, Temperature is 273.15 K and pressure is 1 atm

P . V = n . R . T

n = (P . V) / R. T → (1 atm . 32.6L) / (0.082 . 273.15K)

n = 1.455 mol

Answer:

0.974 atm; 740 mm Hg; 98.7 kPa; 0.987 bar

Answer:

Upthrust.

An upthrust is that outward protruding force that acts opposite to the weight of the object

Answer:

is there an attachment to this question? i can help if u insert one :)

Explanation:

(●'◡'●)

Answer:

d

Explanation:

because the water has to be more , the KBR Is (excess) but however it is saturated!

thank you

Answer:

[tex]\boxed {\boxed {\sf C. \ Provide \ the \ water \ needed}}[/tex]

Explanation:

Photosynthesis is an extremely important process for plants, algae, and some bacteria. It helps create their "food", which is glucose. It is turned into energy so the organism can grow, repair damages, and carry out other processes.

The equation for photosynthesis is as follows:

[tex]H_2O+CO_2+energy \rightarrow C_6H_{12}O_6 + O_2[/tex]

Water, carbon dioxide, and light energy from the sun are converted to glucose and oxygen.

Roots are important for obtaining water. Since they reach into the soil, they can absorb the water. Then, capillary action draws the water up the stem into the xylem and then into the leaves, where photosynthesis occurs.

Answer:

alkali metals

alkali earth metals

transition metals

non metals

noble gases

halogens

rare earth metals

Explanation:

Answer:

translate DNA into RNA I hope it helps

Answer: The pH of the solution is 8.8

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.pOH is calculated by taking negative logarithm of hydroxide ion concentration

[tex]pH=-\log [H^+][/tex]

[tex]pOH=-log[OH^-][/tex]

pH+pOH=14

Putting in the values:

[tex]pH+5.2=14[/tex]

[tex]pH=8.8[/tex]

Thus pH of the solution is 8.8

Answer:

it loses 3 electrons

Explanation:

Tell me if I’m right

Answer:

See explanation

Explanation:

1) The reaction of magnesium with oxygen is;

Mg(s) + O2(g) -----> MgO2(s)

The oxidizing agent is the reactant whose oxidation number decreases from left to right in the reaction equation. The oxidation state of oxygen decreased from zero to -2 hence oxygen is the oxidizing agent in the reaction.

2) The advantages of fuel cell includes;

i) it is a clean source of energy

ii) Fuel cells operate quietly and do not constitute noise pollution

One disadvantage of the fuel cell is that its operation is costly.

3) Electrolytic and voltaic cell are similar because they are both electrochemical cells and involve a transfer of electrons between two electrodes.

Electrolytic cells do not operate spontaneously while voltaic cells operate spontaneously. In the volatic cell the anode is negatively charged while the cathode is positively charged. In the electrolytic cell, the anode is positively charged while the cathode is negatively charged.

Answer:

Heyya!

Here are your answers along with the questions:-

Answer:

Ocean waves are longitudinal waves, Sound waves are transverse waves. Ocean waves are electromagnetic waves, Sound waves are mechanical waves. A Sound wave of over 20,000 Cycles per Seconds is inaudible to Humans.

Explanation:

Answer:

Ocean waves are mechanical waves while Sound waves are electromagnetic waves

Explanation:

Jennifer has a jar full of stones. For one year, Jennifer shakes the jar several times each day. The illustration below shows the changes that occurred after one year, and this shows that because of the fragmentation, this happens.

Initially, before a year, there were many rocks, but as she continuously shrank the box, that led to the fragmentation. Due to vibration for a long time, the larger rocks break into the smaller particles as a result of the amount of rocks converted into the small particles and sands. These smaller stone fragments may then accumulate at the bottom of the jar as a result of this there is a decrease in the overall number of stones in the jar.

Learn more about the rock fragments here

https://brainly.com/question/30182426

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Answer:  A pressure of 0.681 atm would be exerted by 0.023 grams of oxygen [tex](O_2)[/tex] if it occupies 31.6 mL at [tex]91^{o}C[/tex].

Explanation:

Given : Mass of oxygen = 0.023 g

Volume = 31.6 mL

Convert mL into L as follows.

[tex]1 mL = 0.001 L\\31.6 mL = 31.6 mL \times \frac{0.001 L}{1 mL}\\= 0.0316 L[/tex]

Temperature = [tex]91^{o}C = (91 + 273) K = 364 K[/tex]

As molar mass of [tex]O_2[/tex] is 32 g/mol. Hence, the number of moles of [tex]O_2[/tex] are calculated as follows.

[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{0.023 g}{32 g/mol}\\= 0.00072 mol[/tex]

Using the ideal gas equation calculate the pressure exerted by given gas as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the value into above formula as follows.

[tex]PV = nRT\\P \times 0.0316 L = 0.00072 mol \times 0.0821 L atm/mol K \times 364 K\\P = \frac{0.00072 mol \times 0.0821 L atm/mol K \times 364 K}{0.0316 L}\\= 0.681 atm[/tex]

Thus, we can conclude that a pressure of 0.681 atm would be exerted by 0.023 grams of oxygen [tex](O_2)[/tex] if it occupies 31.6 mL at [tex]91^{o}C[/tex].

Answer:

_________(question)__________

. A green colour substance 'X' is heated strongly. Its colour changes to 'Y' and smell of burning sulphur is given out.

Explanation:

___(answer)___

a.

_______________

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Friction acts in the opposite direction to the direction of an object's motion. Therefore, option (b) is correct.

Friction can be defined as the resistance provided by the surfaces that are in contact when they pass over each other. Friction offers the traction that is required to walk without slipping.

Friction can be described as a force that is dependent on external factors.  Friction depends upon the nature of the two surfaces that are in contact and on the smoothness or roughness of the two contacted surfaces. When one body moves over the surface of another, these irregularities on the surface of the bodies get entangled and develop friction.

Friction depends upon the force that is exerted on these surfaces and increases when the force is applied along with the irregularities. Types of Friction are Rolling friction, Static friction, Sliding friction, and Fluid friction.

The force of friction acts in the opposite direction to the direction of an object's motion.

Learn more about friction, here:

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Answer:

Three ways I can come up with are increasing the temperature, increased the amount of solvent, and using a solvent with similar polarity as the solute.

Explanation:

Answer:

[tex]T_f=57.3\°C[/tex]

Explanation:

Hello there!

In this case, for this calorimetry problem, it is possible to realize that the hot water at 87.6 °C is cooled down whereas the cold water at 34.5 °C is heated up, according to:

[tex]Q_{cold}=-Q_{hot}[/tex]

Which in terms of mass, specific heat (cancelled out because they have the same value for being water) and temperature difference, is:

[tex]m_{cold}C_{cold}(T_f-T_{cold})=-m_{hot}C_{hot}(T_f-T_{hot})\\\\m_{cold}(T_f-T_{cold})=-m_{hot}(T_f-T_{hot})[/tex]

Thus, solving for the final temperature, we obtain:

[tex]T_f=\frac{m_{cold}T_{cold}+m_{hot}T_{hot}}{m_{cold}+m_{hot}}[/tex]

Then, we plug in to obtain:

[tex]T_f=\frac{200g*34.5\°C+150g*87.6\C}{200g+150g}\\\\T_f=57.3\°C[/tex]

Best regards!

Answer:

c solid metal

Explanation:

it's made of iron and nickel

Answer:

D) solid metal

Explanation:

Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe. Elements that dissolve in iron, called siderophiles, are also found in the core.

The inner core is solid because it is made of very dense, or heavy, materials - like iron and nickel. Even though it is very hot, these materials don't "melt" very easily, so they stay solid.

Answer:

Here is every answer for analog and digital (in order)

Analog:

Digital (in order):

Explanation:

I did mine in bullet points, hopefully this helped!

Analog:

Signal Shape: Smooth and continuous

Numerical Values for Signal Estimations: Analog signals speak to one ceaseless variable as the result of another ceaseless time-based variable.

Amount of Information that can be transmitted: analog circuits can conduct as it were reasonably low-speed information communications.

Energy necessities: light, sound, temperature, position, and pressure Privacy and security : not encrypted

Clarity of Signal: clamor influences clarity and quality, commotion is amplified,

Digital:

Signal shape: stepping, square, and discrete

Numerical Values for Signal Measurements: digital communication methods transmit a complete measured value, in other words both a numeric value and a unit of measurement

Amount of data that can be transmitted: First of all, it is theoretically possible to transmit digital signals directly.

Energy requirements: voltage, accoustic pressure.

Privacy and security: encrypted

Clarity of signal: noise is lower in amplitude, electronics can ignore the noise, quality of signal is maintained, signal is high

Analog signal could be a continuous signal which speaks to physical estimations.

Digital signals are discrete time signals created by computerized balance.

Example :Human voice in discuss, analog electronic gadgets. Computers, CDs, DVDs, and other advanced electronic gadgets.

Answer:

E. 5.049

Explanation:

Multiply the concentration by volume (in liters) first to get moles of NaOH. Then multiply by the molar mass of NaOH to convert to grams.

0.18 M • 0.7000 L = 0.126 mol NaOH

0.126 mol • 39.997 g/mol = 5.040 g --> The closest answer seems to be e. 5.049 g