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Chemistry
Chemistry
High School
How much energy is required to heat 0.24 KG lutetium from 296.2K to 373.5 K? The specific heat for lutetium is 0.154 J/g-K
Chemistry
College
Calculate the density of anobject with a mass of 58g and avolume of 20 mL.Enter
Chemistry
High School
What two elements fill their last electron in the 5s sublevel?
Chemistry
High School
2. Explain how energy originates and is emitted from a star.
Chemistry
High School
Radioactive isotope X has a half-life of 500,000 years. This isotope may be found in some types of volcanic rocks. A particular sample of volcanic rock taken from a layer that covered up some of the earliest known human-like footprints contains 0.125 mg of isotope X. The volcanic rock sample originally contained 8.00 mg of isotope X. How long ago were these footprints made. I need the equation. Thanks. please I am stuck on this question. PLEASE
Chemistry
High School
Luciana explains to Eric how electricity flows in a circuit. Which sentences are a part of her explanation? Select all that apply.A. Without a resistor, electricity cannot flow in a circuit. B. Without a switch, electricity cannot flow in a circuit. C. For electricity to flow in a circuit, the circuit must be complete. D. An insulator such as plastic is needed for electricity to flow in a circuit. E. A conductor is needed for electricity to flow in a circuit.
Chemistry
College
In two to three sentences, explain the trend for atomic size. Why does this trend occur?
Chemistry
High School
Which of the following pairs of elements belong to the same period?
Chemistry
High School
HELP PLEASE!!!chemistry question
Chemistry
Middle School
Compound: ________________. Found in apatite soil, contain phosphorus (P)
Chemistry
High School
N(p+) = 12, N(n0) = 14, N(e-) = 10
Chemistry
High School
There are several ways to model a compound. One type of model is shown. A central C attached to 3 C's by 1 line each, each of the 3 C's being attached to 3 H's by a 1 line each. The central C is also attached by 1 line to a C, which is attached to 2 H's and a C by a single line each. The C is attached by 2 lines to an O ad by 1 line to another O. The O with 1 line is attached by 1 line to an H. What is the chemical formula for the molecule modeled? CHO C4H11O2 C6H12O2 C6H9O
Chemistry
High School
Draw a heating curve for a solid Pls pls helppppp I will mark u as Brainly and award 30 points !!!!
Chemistry
High School
19. Who was the first female astronomerA.AristotleB.En HeduAnnaC.ArchimedesD.Plato
Chemistry
College
Ok here is the next one Im counting on you Thanks.
Chemistry
High School
How many bromine atoms are present in 38.7 g of CH2Br2
Chemistry
College
True or false: An oxidation number is not the same as an actual charge on an ion. True false question. True False
Chemistry
College
Which changes MUST happen for elements to become a compound
Chemistry
High School
A car travels at 35.0 mi/hr. How far has it gone in 2455 seconds?
Chemistry
High School
Is wax ionic or covalent? why?
Chemistry
High School
What is the correct lewis dot structure for2412Mg 2+?
Chemistry
College
The graph shows the average monthly rainfall for aforested area.In which month is a high alert for fire danger mostlikely?A. AprilB. AugustC. MayD. October
Chemistry
High School
H2+ 02 H2Ohow do you balence this
Chemistry
High School
Please answer correctly !!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!! And explain please !!!!!!!!!!!!
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