Chemistry

In which of the following groups of ions are the charges all showncorrectly?
1 Answer
a plane flying at 250 mph for 5 hours. how far did the plane fly? will give brainliest
2 Answers
A solid substance turns directly into a gas. Which term describes this change?A)deposition B)evaporationC)meltingD)sublimation
2 Answers
QUESTIONS40. Because stimulantswill be compromised.your ability to use proper judgment on the roadA. increase your heart rateB. overload your nervous systemC. slow down your bodily functionsD. usually cause hallucinations
1 Answer
When planning a simple experiment, what does it mean to test one variable? a During the experiment, the scientist keeps the control the same but changes many other elements he or she is testing. b During the experiment, the scientist has only one element, or variable, that is changed to test the hypothesis. c The scientist can only use simple language and materials when planning the one variable to be tested. d The scientist plans and performs just one science experiment a day to test one variable.
2 Answers
What conversion factor will help solve the problem?2HgO 2Hg + O2How many moles of mercury (II) oxide are needed to make 125 grams of O2 125 g O2 x ___1 mol__O2 x ____________ = mols HgO 32.00 g O2 a2 mol Hg1 mol O2 b216.6 g HgO1 mol HgO c1 mol O22 mol HgO d2 mol HgO1 mol O2
1 Answer
How many ATOMS are in 5 grams of NaCl?
2 Answers
Which of the following is NOT a benefit ofusing renewable energy sources?
2 Answers
Plants have various levels of organization. At which level of organization are the smallest structures in a plant?CellularOrganOrganism Tissue
1 Answer
Which of the following are solutions?Choose more than one if needed1. Gas dissolved in a liquid2. Liquid dissolved in a liquid3. Solid mixed with solid4. Solid dissolved in a liquid
1 Answer
Fluorine gas a 300 K occupies a volume of 500 mL. To what temperature should it be lowered to bring the volume to 300 mL?
2 Answers
A slug travels the length of a log in 2 hours. If the slug's average speed is 1.5 cm / minute how long is the log
2 Answers
1. Cierta muestra fue diluida as: 1 mL MP se agrega 4mL de agua, luego se extrae 0,5 mL y se lleva a 5 mL y de esta ltima se obtiene 0,2 y se aade 1,3 de diluyente. Calcule la dilucin total.
1 Answer
Look at the diagram below, which shows an atom of an element. How many valence electrons does it have? Based on this, would the atom be reactive or unreactive?
1 Answer
What happens with electrons when atoms form covalent bonds?
1 Answer
The net force of a vehicle that is accelerating at a rate of 1.5 m/s2 is 1,800 newtons. What is the mass of the vehicle to the nearest kilogram?
1 Answer
How many moles are in 272 grams of hydrogen peroxide (H2O2) ?
1 Answer
Anyone know the answer
1 Answer
How are plate tectonics and the rock cycle connected? Select the best answer from the choices below. aThe rock cycle keeps the plates from moving too far apart bIgneous rocks that form from magma are a major part of the rock cycle cThe heat from the mantle that fuels plate tectonics also drives the rock cycle dPlate tectonics causes sedimentary rocks to turn into metamorphic rocks
1 Answer
The tablets were crushed, and 4.9993 g of the powder was transferred to a beaker and reacted with HCl. After filtration, the filtrate was transferred to a 100-mL volumetric flask and diluted with water. 20.00 mL of this stock solution were combined with 0.2 M Na3PO4. The resulting precipitate weighed 0.3451 g after drying. Calculate the moles of BiPO4 precipitated, the moles of Bi3 in the stock solution, and the mass of BSS per tablet.
1 Answer
How can water affect the rock cycle?Water can cause rocks to break into sediments through mechanical weathering.Water can cause rocks to be buried deep underground.Water can cause rocks to melt.Water can causer rocks to break into sediments through chemical weathering.
1 Answer
Name the gas that the limewater in the flask is testing for.
1 Answer
Paul swam 7 5/8 miles. His sister swam five times as many miles. How many miles did Paul's sister swim?
1 Answer
Sn(IV) and Br chemical formula
1 Answer