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What is the maximum volume of hydrogen that can be liberated when 1.2 moles of zinc are added to excess dilute hydrochloride acid at room temperature and pressure?

A greenish blues solid A is heated.
It gives off a colourless gas B and leaves a black solid C.
(i) Name the gas B and give a test for tge gas B?
(ii) Write a balanced chemical equation for the reaction given above?

Upon reaching a downward velocity of 100 miles per hour, 300 newions of drag resist the diver's motion. How large is the skydiver's acceleration?

An object 5.0 cm high is placed 2.0 cm from a converging (convex) lens which is being used as a magnifying glass. The image produced is 6.0 cm from the lens and is 15 cm high.What is the focal length of the lens?

The velocity of an object with a mass of #5 kg# is given by #v(t)= 2 t^2 + 9 t #. What is the impulse applied to the object at #t= 7 #?

What is a physical quantity that has magnitude but no direction?

How do i calculate the number of moles of magnesium, chlorine, and oxygen atoms in 7.70 moles of magnesium perchlorate, #"Mg"("ClO"_4)_2#. Express the number of moles of Mg, Cl, and O atoms numerically, separated by commas. moles of Mg, Cl, O =?

How do you solve the inequality #3x < 5x + 8#?

Who proved j.j thomson incorrect with his cathode ray tube experiments?

What is the strongest power ever found?

Can I solved this problem by using conservation of energy ?

How do you solve for parallax?

Question #c9346

A 2300 kg rocket shuts off its engine 494km above earth's surface. Its velocity at burnout is 3000 m/s directly upward. Ignoring air resistance, what maximum height will the rocket reach?

Question #f6828

If the intensity of a sound from one source is 100 times that of another sound, how much more is the decibel level of the louder sound than the softer one?

Question #78875

What is the fourth root of #16# ?

A car accelerates from #32.0m/s# to rest with an acceleration of #3.20m/s^2#. What is the car's displacement from t=2 to t=3 seconds? What is the car's displacement from t=4 to t=5 seconds?

A solid disk, spinning counterclockwise, has a mass of #7 kg# and a radius of #5 m#. If a point on the edge of the disk is moving at #2 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

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All external forces on the body cancel out. Which statement must be correct?

Question #8c25d

Ryan was 8 when his parents invested $4000 in a certificate of deposit that pays 6%. If Ryan leaves the account alone until it reaches $10,000, how old will he be?

If a single feather were dropped from a height of 3 m, would its fall have projectile motion?

Can someone help me calculate the speed of this please? Thank you very much!

The halflife of cobalt60 is 5.3 years. How many years will it take for 1/4 of the original amount of coblat60 to remain?

How do you multiply #(6x y ) ( 3x ^ { 9} y ^ { 6} ) #?

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Edwin Hubble discovered the universe was expanding by measuring the light of distant stars, and by showing that those distant stars were moving further away from the earth. If this is so, then why is the Andromeda Galaxy moving closer to us?

What are the steps to solving both parts correctly?

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How many superclusters are there in the observable universe?

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What is the compound interest on a threeyear, #$100.00# loan at a #10%# annual interest rate?

Which molecule is involved in transport of oxygen?

How do you evaluate #(5.7\times 10^ { 4} ) ( 3.1\times 10^ { 6} )#?

What is the difference between a radian, an arcsecond and a parsec?

Screenprinting a batch of shirts requires 2 minutes per shirt in addition to 2 minutes of initial setup time. How long does it take to screenprint a batch of 4 shirts?

Question #46824

13 out of 16 students are in grade 8. What proportion could you use to calculate the percent of the students who are in grade 8? Solve your proportion.

How do you convert #( 2x , 2y )# into polar coordinates?

How do you find the limit of #(sin( x  2)) / (x^2  4)# as x approaches 0?

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An object with a mass of #150 g# is dropped into #500 mL# of water at #0^@C#. If the object cools by #72 ^@C# and the water warms by #3 ^@C#, what is the specific heat of the material that the object is made of?

How do you graph #F(x)=log_3(x2)#?

How do you solve and graph #x5<8#?

How do you simplify #(2sqrt7+ sqrt3)(3sqrt7 + √2)#?

You tell your parents that you will pay the 15% tip for dinner. The bill was $130.56. You have $20. Do you have enough to pay the tip? How much should the tip be?

A 10N force at right angle 45 degree above the horizontal has a horizontal component of about ? CHOICES IN THE DETAILS ..

How do you solve for #B# in #A= \frac { 1} { 2} h ( b + B)#?

Question #3ba3f

How do astronomers test the theories of star formation?

What is the Cartesian form of #(49,(3pi)/4)#?

How much heat in kcal does #"26.4 g"# of diethyl ether absorb if it was heated from #12.7^@ "C"# to #30.5^@ "C"#? The specific heat capacity is #"0.895 cal/g"^@ "C"# in this temperature range.

Question #7128c

A line passes through #(5 ,8 )# and #(4 ,9 )#. A second line passes through #(3 ,5 )#. What is one other point that the second line may pass through if it is parallel to the first line?

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How do you graph #y= x+4# by plotting points?

How do you write each realworld example as a rate using labels and then the unit rate: Melissa types 1300 words in 13 minutes?

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How do you evaluate #(2x ^ { 2} ) (  2x ^ { 8} ) ( 3x ^ { 5} )#?

What percent of 15,000 is 18,000?

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Rain is falling vertically with a speed of 30 m/s. The wind is blowing with a speed of 10 m/s in the direction from north to south. In what direction should Paul hold his umbrella to protect himself from the rain?

How do you solve the equation #abs(12x)=9#?

Which two consecutive integers are such that the smaller added to the square of the larger is #21#?

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How do you determine whether the sequence #80, 40, 20, 10, 5,...# is arithmetic and if it is, what is the common difference?

A container has a volume of #24 L# and holds #32 mol# of gas. If the container is compressed such that its new volume is #7 L#, how many moles of gas must be released from the container to maintain a constant temperature and pressure?

What is #(root3(a^2b^2)) sqrt(a^2b^3)# in simplified radical form?

Which quadrants (excluding the origin and axes) does #f(x)=x^2# pass through?

I need some help please? With details, thank you ^^

Can you help me please? Thank you.

Question #35375

Suppose the output force of a machine is 24 N, and the mechanical advantage is 3. What is the input force?

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Two charges of # 1 C # and # 4 C # are at points # (2 ,1,8 ) # and # ( 1,4,2)#, respectively. Assuming that both coordinates are in meters, what is the force between the two points?

How do you graph #y=2cot4x#?

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How many hydrogen atoms in a #250*g# mass of water?

The gas inside of a container exerts #15 Pa# of pressure and is at a temperature of #60 ^o K#. If the pressure in the container changes to #36 Pa# with no change in the container's volume, what is the new temperature of the gas?

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