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A 10.0 g sample of potassium bromide is treated with perchloric acid solution. The reaction mixture is cooled and solid KClO4 is removed by filtering, then it is dried and weighed.
KBr (aq) + HClO4 (aq) KClO4 (s) +HBr (aq) The product weighed 8.8 g. What was the percent yield?

Why does the dehydration of alcohol yield more alkene products?

What conflicts and issues has Trevor Noah faced? How did these conflicts shape his identity?

State and explain Pythagorean theorem

A pom-pom manufacturer makes each of its pom-poms with 35% white strands (w), 25% blue strands (b), and 40% red strands (r). If each pom-pom has a total of 80 strands, how many of strands of each color are needed to make a pair of pom-poms? In this activity, you'll work through this pom-pom problem step by step. See attached filed for further information.

The neutral atoms of all of the isotopes of the same element have ___.

1. What behavioural expectations would you set for Bradley to improve his interactions with other children and educators? List three expectations/goals.

   Bradley is a three-year-old boy who attends your service two days a week. He has been in the pre-school room for the last three months and during that time his behaviour has become increasingly challenging. Bradley is openly defiant to all but one of the educators. He refuses to follow directions, join in on group time, or participate in planned activities. When asked to join a group, he screams ‘No’, and, if pressed, will swear and throw objects at the educators. He wanders aimlessly around the room, sabotaging the other children’s work, knocking over their block constructions, or scribbling on their drawings. He lashes out physically towards the other children for no apparent reason, and they are now so scared of him that they avoid him whenever possible. When the educators have tried to discuss Bradley’s increasingly disturbing behaviour with his family they have appeared disinterested and make flippant remarks like ‘kids will be kids’ or ‘that’s boys for you’.

   Yesterday Bradley attempted to run away from the service by sneaking out to the outdoor play area and trying to scale the fence. When an educator tried to get him down from the fence, he kicked her in the face, causing her nose to bleed.

Did you have been other countries?

A solution contains 1.0 x 10-5 M Na3PO4. What is the minimum concentration of silver nitrate that would cause precipitation of solid silver phosphate (Ksp = 1.8 x 10-18)?

What volume of 0.0441M sulphuric acid is required to titrate 25cm^3 of 0.1M sodium hydrogen carbonate(round off to two decimal places)

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a figure in the second quadrant is reflected over the y-axis. In which quadrant will the reflected figure appear

. A 1.248 g limestone rock, which contains CaCO3 and other compounds, is pulverized and treated with 30.00 mL of 1.035 M HCl solution. The excess acid requires 11.56 mL of 1.010 M NaOH for neutralization. Calculate the percent by mass of calcium carbonate in the rock, assuming it is the only substance reacting with the HCl solution.

1) What is dipole moment...?

2) Does RuBisCO enzyme have dipole moment...?

The volume V of an ideal gas varies directly with the temperature T and inversely with the pressure P. A cylinder contains oxygen at a temperature of 310 degrees K and a pressure of 18 atmospheres in a volume of 120 liters. Find the pressure if the volume is decreased to 105 liters and the temperature is increased to 350 degrees K.

Round your answer to two decimal places.

Locate the centroid of the shaded area. Dimensions are in mm.

1*10,10*1,2*3,4*5,6*7, answer

Consider the peptides Gly-Pro-Ser-Glu-Thr (open Chain) and Gly-Pro-Ser-Glu-Thr with a peptide bond linking the Thr and the Gly. Are these peptides chemically the same?

A mass of 3.3214 g of sodium bicarbonate was dissolved and diluted to 250.00 ml of aqueous solution. A 29.55OX mL of sodium bicarbonate solution was used to neutralise 25.00 ml of H2SO4 solution during a titration. Calculate the molar concentration of H2SO4 solution. 

If the resistance of a Nichrome wire is 100.00 Ω at 11.5°C.
i. What is its resistance of at 0.0°C?
ii. What is the resistance of a carbon rod at 25.8°C if its resistance is 0.0160Ω at
0.0°C?

A survey of 1800people who took trips revealed that 128 of them included a visit to a theme park. Based on those survery results, a management consultant claims that less than 88 % of trips include a theme park visit. Test this claim using the 𝛼=0.01significance level.

The test statistic is
The critical value is

 Can you find a vector quantity that has a magnitude of zero but components that are
different from zero? Explain. Can the magnitude of a vector be less than the magnitude
of any of its components? Explain

What is delta

Explane Autotrophic & Heterotrophic Nutrition

Who can help you better than a medical student in science!

what is a junior problem

What are the uses of exponential function in differantial equation?

which of the following statements bests describes microsleep