Recent activity by Chris Tophski

Recent activity by Chris Tophski

Nitrogen effuses through a pinhole 1.7 times as fast as another gaseous element under the same conditions. Estimate the other element’s molar mass and determine its probable identity.

answered Nov 15, 2023

1 answer 158k views

What is the ‘?’ in this question 3/7 times ? = 0.1

asked Nov 11, 2023

1 answer 136k views

Express your answer in scientific notation. 0.00045-2.5x10^-5

asked Oct 26, 2023

1 answer 186k views

2. The table below shows a linear relationship between x and y. x y5 36510 19015 15What is the rate of change for this relationship? A. 35 B. -35 C. 540 D. -540

asked Oct 25, 2023

1 answer 217k views

How do you create depth on a piece of paper? A. Create a foreground, mid-ground, background B. All answers apply C. Use a variety of sizes D. Overlap

answered Aug 26, 2023

1 answer 147k views

PLEASE HELP MEE I DONT UNDERSTAND

answered Aug 22, 2023

1 answer 233k views

A certain drug is made from only two ingredients: compound A and compound B. There are 5 milliliters of compound A used for every 7 milliliters of compound B. If a chemist wants to make 1056 milliliters

asked May 22, 2023

1 answer 79.1k views

Identify the subordinating clause in the following sentence. Since the existence of subordinating conjunctions creates dependent clauses, sentences that contain them are either complex or compound-complex.

asked Apr 27, 2023

2 answers 165k views

Please help me! I don’t understand the guided reading questions at all.

answered Apr 18, 2023

2 answers 37.2k views

Kevin and Clark each bought a new book for $50. Kevin sold his book to the used bookstore for 25% less than the original price. Clark sold her book to the used bookstore for 40% less than the original

asked Dec 15, 2022

1 answer 149k views

Can someone plz help me ?

answered Dec 2, 2022

1 answer 224k views

2 H2O2-> 2H20+02 2. What are the reactants in this reaction? 3. What are the products in this reaction? 4. What happened in this particular reaction? What happens in general decomposition reaction?

answered Nov 29, 2022

1 answer 129k views

Mrs. Allen baked 9 pies. She sliced each pie into pieces that are 1/5 of a whole. How many pieces of pie does she have? thx

asked Nov 19, 2022

2 answers 164k views

QUESTION 11 Identify the reaction type. KOH + HNO3 -> H2O + KNO3 O combustion O decomposition O combination O single displacement O double displacement

answered Sep 19, 2022

2 answers 58.7k views

Find the value of B. 200 + 50 + B = 100 + 47 + 10 + 100

asked Sep 9, 2022

2 answers 192k views

The figure shown is a rectangle with a semicircle on each end. What is the area of the figure? Use 3.14 for 7 and round your answer to the nearest tenth.

asked Aug 10, 2022

1 answer 128k views

Please help will mark brainpower pic below

answered Jun 7, 2022

2 answers 117k views

Help! The screenshot is down below!!

asked Jun 5, 2022

1 answer 103k views

7) At what interest rate would a deposit of $50,000 grow to $111,277 in 25 years with continuous compounding? A) 3.2% B) 6.2% C) 1.2% D) 4.2%

asked May 1, 2022

1 answer 15.6k views

B. Why are there such concentrated groups of African Americans living in the American South? PLEASE HELP

asked Apr 9, 2022

1 answer 54.5k views

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